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1

Orthopedic services  

MedlinePLUS

... orthopedic conditions. Your health care provider may order: Arthrograms (joint x-ray) Bone scans Computed tomography (CT) ... Mosby Elsevier; 2007. Silverstein JA, Moeller JL, Hutchinson MR. Common issues in orthopedics. In: Rakel RE, ed. ...

2

Orthopedic radiology  

SciTech Connect

This book is a presentation on orthopedic radiology. The book features coverage of the skeleton by anatomic area, with use of radiographs. Each chapter presents radiologic coverage of normal anatomy, normal variants, and common disorders for each system.

Weissman, N.W.; Sledge, C.B.

1986-01-01

3

[Manual medicine and orthopedics].  

PubMed

Manual medicine (MM) is a manual medical technique to identify and treat reversible dysfunction especially of the musculoskeletal system. The origins of MM were derived from empirical observations but MM is nowadays based on anatomy, biomechanics and neurophysiology. Besides special training in palpation according to precise topographic anatomic knowledge, the diagnostics of segmental or articular dysfunction are also based on knowledge about afferent convergence of multiceptive neurons located in proprioceptive and nociceptive layers of the brain stem and spinal cord. This leads to activation of motor and sympathetic reactions with the consequence of segmental or regional dysfunction. Manual therapy aims to eliminate noci-afferents as well as to activate inhibitory receptive fields. This can be achieved either by a single high velocity manipulative impulse or by slow-soft rhythmic repetitive mobilization. The special medical education and training in MM is outlined in relation to the Bologna postgraduate concept. As MM is basically used in relation to the musculoskeletal system it should definitely be incorporated into the specialization for orthopedics and traumatology and become part of the examination. In outpatient medicine an orthopedic and trauma surgeon without MM expertise will be inferior to a general practitioner with this expertise. PMID:24048264

von Heymann, W; Locher, H

2013-10-01

4

21 CFR 888.4540 - Orthopedic manual surgical instrument.  

Code of Federal Regulations, 2010 CFR

...nonpowered hand-held device intended for medical purposes to manipulate tissue, or for use with other devices in orthopedic surgery. This generic type of device includes the cerclage applier, awl, bender, drill brace, broach,...

2009-04-01

5

Integrating computers into orthopedic research.  

PubMed

The role of computers in orthopedic research and education is expanding rapidly. Its potential to manipulate large amounts of data and execute multiple complex assignments with great speed and accuracy indeed make the computer an awe-inspiring device. An important instrument in research is the computerized database, a collection of related data arranged so that useful information may be retrieved. Computer models derived from classical physics and fluid mechanics have been used to study motion of both extremities and spinal articulations. Computers also have found usefulness in clinical orthopedic research. The orthopedist of the future will use the computer directly in clinics and private practice for patient evaluation, computer-assisted preoperative planning, and financial recordkeeping. PMID:1923969

Aguilar, E A; Baratta, R V; D'Ambrosia, R

1991-08-01

6

Biodegradable Orthopedic Implants  

Microsoft Academic Search

Over the past 30 years, there have been significant advances in the development of biodegradable materials [79]. In particular, these materials have received attention for use as implants to aid regeneration of orthopedic defects [49,91]. Every year more than 3.1 million orthopedic surgeries are performed in the United States alone [1]. However, although current treatments using nondegradable fixation materials have

Johnna S. Temenoff; Antonios G. Mikos

7

Nanobiomaterial applications in orthopedics  

Microsoft Academic Search

Advancements in nanobiotechnology are revolutionizing our capability to understand biological intricacies and resolve biological and medical problems by developing subtle biomimetic techniques. Nanocomposites and nanostructured materials are believed to play a pivotal role in orthopedic research since bone itself is a typical example of a nanocomposite. This article reviews current strategies using nanobiomaterials to improve current orthopedic materials and examines

Elizabeth M. Christenson; Kristi S. Anseth; Jeroen J. J. P. van den Beucken; Casey K. Chan; Batur Ercan; John A. Jansen; Cato T. Laurencin; Wan-Ju Li; Ramalingam Murugan; Lakshmi S. Nair; Seeram Ramakrishna; Rocky S. Tuan; Thomas J. Webster; Antonios G. Mikos

2007-01-01

8

Orthopedics Clinic Assistant System.  

National Technical Information Service (NTIS)

This research proposed a system, which integrated the complete patient information, including the medical images, for assisting orthopedics clinic diagnosis. The system concurrently operated with legacy systems and conformed itself to correspond with the ...

S. Tang Y. Huang M. Hsiao T. Lee S. Young

2001-01-01

9

Selfprotective smart orthopedic implants.  

PubMed

In this review, we discuss current advances leading to an exciting change in implant design for orthopedic surgery. The initial biomaterial approaches in implant design are being replaced by cellular-molecular interactions and nanoscale chemistry. New designs address implant complications, particularly loosening and infection. For infection, local delivery systems are an important first step in the process. Selfprotective 'smart' devices are an example of the next generation of orthopedic implants. If proven to be effective, antibiotics or other active molecules that are tethered to the implant surface through a permanent covalent bond and tethering of antibiotics or other biofactors are likely to transform the practice of orthopedic surgery and other medical specialties. This new technology has the potential to eliminate periprosthetic infection, a major and growing problem in orthopedic practice. PMID:17187471

Parvizi, Javad; Antoci, Valentin; Hickok, Noreen J; Shapiro, Irving M

2007-01-01

10

Tourniquets in orthopedic surgery  

PubMed Central

Tourniquets are commonly used in limb surgeries, be it orthopedic or plastic surgeries. But the inflation pressures, the duration, and release guidelines are still not clear. According to a survey, majority of orthopedic surgeons inflate the tourniquet to fixed pressures for the upper and the lower limbs without considering the baseline blood pressure of the patient on whom the tourniquets are being applied. This review was designed to recall and review the safe use of tourniquets and the various techniques that can be employed to minimize the complications of tourniquet use. Google, science direct, and pubmed were searched for appropriate literature and relevant articles were identified.

Sharma, Jai Prakash; Salhotra, Rashmi

2012-01-01

11

Orthopedic Composite Materials.  

National Technical Information Service (NTIS)

The program was designed as a pilot project to establish new techniques for making orthopedic prosthetic materials. The basic idea was to make metal supported ceramic composites, so that the metal provided strength (and an element of ductility) and the re...

B. J. Shaw

1972-01-01

12

Engineering Orthopedic Tissue Interfaces  

PubMed Central

While a wide variety of approaches to engineering orthopedic tissues have been proposed, less attention has been paid to the interfaces, the specialized areas that connect two tissues of different biochemical and mechanical properties. The interface tissue plays an important role in transitioning mechanical load between disparate tissues. Thus, the relatively new field of interfacial tissue engineering presents new challenges—to not only consider the regeneration of individual orthopedic tissues, but also to design the biochemical and cellular composition of the linking tissue. Approaches to interfacial tissue engineering may be distinguished based on if the goal is to recreate the interface itself, or generate an entire integrated tissue unit (such as an osteochondral plug). As background for future efforts in engineering orthopedic interfaces, a brief review of the biology and mechanics of each interface (cartilage–bone, ligament–bone, meniscus–bone, and muscle–tendon) is presented, followed by an overview of the state-of-the-art in engineering each tissue, including advances and challenges specific to regenerating the interfaces.

Yang, Peter J.

2009-01-01

13

Blood management in orthopedic surgery  

Microsoft Academic Search

The orthopedic surgeon has several options available for blood conservation. Preoperative autologous donation (PAD) of blood is a cost-effective measure when the cost of managing transfusion-transmitted infectious disease is considered; overuse and underuse are expensive problems, however. Hemodilution, while used successfully in prostate surgery, is logistically impractical in joint replacement centers. Intraoperative blood salvage, although costly, is useful in orthopedic

Thomas P. Sculco

1995-01-01

14

Virtual reality orthopedic surgery simulator  

Microsoft Academic Search

This paper describes a highly interactive virtual reality orthopedic surgery simulator. The simulator allows surgeons to use various surgical instruments to operate on virtual rigid anatomic structures, such bones, prostheses and bone grafts, to simulate every procedure on the rigid structures for complex orthopedic surgeries, including arthroplasty, corrective or open osteotomy, open reduction of fractures and amputation. A comparative study

Ming-Dar Tsai; Ming-Shium Hsieh; Shyan-Bin Jou

2001-01-01

15

Prions and orthopedic surgery.  

PubMed

Prions are a novel class of infectious agents that cause subacute encephalopathy in man and animals as human Creutzfeldt-Jakob disease (CJD), sheep scrapie and bovine spongiform encephalopathy (BSE). Previously, prions were shown to be transmitted by neuro- and ophthalmosurgical measures and by application of brain-derived therapeutic hormones. Recently, prions have been detected in blood specimens of experimentally infected monkeys indicating a principal threat to transfusion medicine, furthermore in human or bovine materials used in reconstructive surgery. In this article the risk of prion transmission from the surgeon to the patient or vice versa during (orthopedic) surgery is reevaluated including the issues of blood transfusion. This is accomplished based on recent epidemiologic findings and biometric calculations on the spread of prions in animals and humans as well as in terms of experimental data on artificially contaminated medical materials and devices. The overall risk of prion transmission in orthopedic surgery is considered very low if adequately prepared and sterilized materials and devices are used. PMID:12789474

Doerr, H W; Cinatl, J; Stürmer, M; Rabenau, H F

2003-06-01

16

Tissue bioengineering in orthopedics.  

PubMed

The use of cells for the purpose of orthopedic tissue engineering started more than 300 years ago. The first attempt of bone grafting was reported in 1668 by the Dutch surgeon Job-Van Meek'ren. In 1867, Ollier performed a series of experiments using transplanted periosteum and concluded that transplanted periosteum and bone remained alive and formed new bone. The osteogenic potential of transplanted bone marrow was later documented by Goujon in 1869, then by Macewen in 1881. Efforts of Albee and Phemister highlighted further the utility of bone transplantation for the healing of fractures and bone defects. The techniques for autografting pioneered by these individuals remained largely unchanged until today. Advances in understanding of the biology of osteogenic cells, the availability of many highly purified peptide growth factors, and the capacity to create highly specialized implantable materials have launched an explosion of new advances in bone grafting and bone regeneration, all under the banner of tissue engineering. This new field is rapidly expanding the armamentarium of orthopedic surgeons in every setting in which bone healing is required. Composites of cells and matrices are at the core of this revolution. PMID:22783330

Hernigou, Philippe; Homma, Yasuhiro

2012-05-29

17

Tissue bioengineering in orthopedics  

PubMed Central

Summary The use of cells for the purpose of orthopedic tissue engineering started more than 300 years ago. The first attempt of bone grafting was reported in 1668 by the Dutch surgeon Job-Van Meek’ren. In 1867, Ollier performed a series of experiments using transplanted periosteum and concluded that transplanted periosteum and bone remained alive and formed new bone. The osteogenic potential of transplanted bone marrow was later documented by Goujon in 1869, then by Macewen in 1881. Efforts of Albee and Phemister highlighted further the utility of bone transplantation for the healing of fractures and bone defects. The techniques for autografting pioneered by these individuals remained largely unchanged until today. Advances in understanding of the biology of osteogenic cells, the availability of many highly purified peptide growth factors, and the capacity to create highly specialized implantable materials have launched an explosion of new advances in bone grafting and bone regeneration, all under the banner of tissue engineering. This new field is rapidly expanding the armamentarium of orthopedic surgeons in every setting in which bone healing is required. Composites of cells and matrices are at the core of this revolution.

Hernigou, Philippe; Homma, Yasuhiro

2012-01-01

18

Locking Mechanism for Orthopedic Braces.  

National Technical Information Service (NTIS)

A locking mechanism for orthopedic braces is described which automatically prevents or permits the relative pivotable movement between a lower brace member and an upper brace member, the locking mechanism also including a secondary manually operable latch...

J. I. L. Chao C. H. Epps

1977-01-01

19

Locking Mechanism for Orthopedic Braces.  

National Technical Information Service (NTIS)

A locking mechanism for orthopedic braces is described which automatically prevents or permits the relative pivotable movement between a lower brace member and an upper brace member. The upper and lower brace members are provided with drilled bores within...

J. I-lechao C. H. Epps

1976-01-01

20

76 FR 20690 - International Consortium of Orthopedic Registries; Public Workshop  

Federal Register 2010, 2011, 2012, 2013

...FDA-2011-N-0002] International Consortium of Orthopedic Registries; Public Workshop AGENCY...entitled ``International Consortium of Orthopedic Registries (ICOR).'' The [[Page...facilitate discussion among FDA and worldwide orthopedic registries that have orthopedic...

2011-04-13

21

Functional Outcome of Frozen Shoulder after manipulation under anaesthesia  

Microsoft Academic Search

Objective: To analyze and compare the functional outcome in adhesive capsulitis after manipulation under anaesthesia and keeping the extremity in abduction and external rotation combined with local steroid injection v\\/s manipulation under anaesthesia combined with local steroid alone, in terms of range of motion. Methods: A comparative prospective study was done at the department of Orthopedics Surgery, Liaquat National Hospital,

Athar Zubairi; Intikab Taufiq

22

Growth factors in orthopedic surgery.  

PubMed

Growth factors have represented an essential issue of interest for the researchers and clinicians in orthopedics and trauma over the last 40 years. In the last 10 to 15 years, the advances registered in this field have permitted the identification of the most active cellular and humoral factors as well as the improvement of their use in the orthopedic and trauma surgery. Their domain of application has been continuously enlarged and the results have been visible from the beginning. The authors present their appreciation on the actual state of this subject as well as their experience with results and related conclusions. PMID:20302195

Zaharia, Comeliu; Niculescu, Marius; Despa, Nicoleta; Simionescu, Maya; Jinga, Victor; Fleseriu, Irina

23

Bleeding disorders in orthopedic surgery.  

PubMed

With increasing recognition of the complications related to coagulopathies, it is of paramount importance for all orthopedic surgeons to possess a basic knowledge of common bleeding disorders. The evaluation of the coagulopathic patient requires a careful history, physical examination, and laboratory evaluation. Bleeding disorders commonly include quantitative and qualitative platelet and coagulation factor disorders and coagulation inhibitors. The management of these coagulopathies that can be encountered in elective and nonelective practice is often ignored. With appropriate knowledge and a multidisciplinary approach with hematologists and cardiologists, surgeons can perform minor and major orthopedic procedures safely and effectively. PMID:23218621

Mansour, John; Graf, Kenneth; Lafferty, Paul

2012-12-01

24

Common orthopedic problems of the newborn.  

PubMed

Newborn orthopedic problems are cause for major concern, both economically and emotionally, for the family. Dysplasia of the hip and abnormal feet can be successfully diagnosed and treated with proper assessment and early recognition. This article reviews the orthopedic examination for the newborn infant, discusses the major orthopedic problems encountered in the neonate, and provides guidelines that will impact the course of the condition for both the patient and family for those professionals working in orthopedics. PMID:9769351

Fernbach, S A

1998-12-01

25

Orthopedic Management of Spina Bifida  

ERIC Educational Resources Information Center

|The management of orthopedic problems in spina bifida has seen a dramatic change over the past 10 years. The negative effects of spasticity, poor balance, and the tethered cord syndrome on ambulatory function are better appreciated. There is less emphasis on the hip radiograph and more emphasis on the function of the knee and the prevention of…

Thomson, Jeffrey D.; Segal, Lee S.

2010-01-01

26

Atlas of pediatric orthopedic radiology  

SciTech Connect

The book illustrates and discusses general principles including bone growth, dysplasia, trauma, infection, positional abnormalities, and metabolic disease, followed by detailed consideration of each region of the extremities and then the trunk. Those radiographic findings of orthopedic importance are emphasized, with images selected for their instructive value.

Oestreich, A.E.; Crawford, A.H.

1986-01-01

27

Porous metal for orthopedics implants  

PubMed Central

Summary Porous metal has been introduced to obtain biological fixation and improve longevity of orthopedic implants. The new generation of porous metal has intriguing characteristics that allows bone healing and high osteointegration of the metallic implants. This article gives an overview about biomaterials properties of the contemporary class of highly porous metals and about the clinical use in orthopaedic surgery.

Matassi, Fabrizio; Botti, Alessandra; Sirleo, Luigi; Carulli, Christian; Innocenti, Massimo

2013-01-01

28

Tissue manipulation  

US Patent & Trademark Office Database

An apparatus and method for manipulating and anchoring tissue is provided. The invention is directed to solving the problem of manipulating and anchoring tissue within a joint when access to that tissue is limited, for example, during arthroscopic surgery.

2012-01-24

29

Orthopedic Gene Therapy in 2008  

PubMed Central

Orthopedic disorders, although rarely fatal, are the leading cause of morbidity and impose a huge socioeconomic burden. Their prevalence will increase dramatically as populations age and gain weight. Many orthopedic conditions are difficult to treat by conventional means; however, they are good candidates for gene therapy. Clinical trials have already been initiated for arthritis and the aseptic loosening of prosthetic joints, and the development of bone-healing applications is at an advanced, preclinical stage. Other potential uses include the treatment of Mendelian diseases and orthopedic tumors, as well as the repair and regeneration of cartilage, ligaments, and tendons. Many of these goals should be achievable with existing technologies. The main barriers to clinical application are funding and regulatory issues, which in turn reflect major safety concerns and the opinion, in some quarters, that gene therapy should not be applied to nonlethal, nongenetic diseases. For some indications, advances in nongenetic treatments have also diminished enthusiasm. Nevertheless, the preclinical and early clinical data are impressive and provide considerable optimism that gene therapy will provide straightforward, effective solutions to the clinical management of several common debilitating disorders that are otherwise difficult and expensive to treat.

Evans, Christopher H; Ghivizzani, Steven C; Robbins, Paul D

2008-01-01

30

21 CFR 888.4540 - Orthopedic manual surgical instrument.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Orthopedic manual surgical instrument. 888.4540 Section 888... MEDICAL DEVICES ORTHOPEDIC DEVICES Surgical Devices § 888.4540 Orthopedic manual surgical instrument. (a) Identification....

2013-04-01

31

Vascular Injuries Associated with Elective Orthopedic Procedures  

Microsoft Academic Search

The objective of this study was to review the diagnosis, management, and outcome of the rare iatrogenic arterial injury associated with elective orthopedic joint procedures. A retrospective review was conducted of all patients presenting to the vascular surgery service with arterial injury after elective orthopedic procedures between 1997 and 2002. Clinical records were reviewed for presentation, type of injury, management,

Jeffrey S. Wilson; Ana Miranda; Brad L. Johnson; Murray L. Shames; Martin R. Back; Dennis F. Bandyk

2003-01-01

32

Imaging of orthopedic trauma and surgery  

SciTech Connect

This book bridges the communication gap, between the radiologist and the orthopedic surgeon in regard to trauma. It also combines ease of use with authoritative information, and includes in each discussion a review of the pertinent anatomy, mechanism of injury, and radiology and orthopedic classification.

Berquist, T.H.

1986-01-01

33

Orthopedics  

SciTech Connect

This book presents a method of assessing a variety of entities with pathologic impact on the skeleton. The book covers 97 skeletal abnormalities or diseases. Each case is presented as a question (consisting of a radiography followed by a short clinical history and a query such as What is the abnormality '') followed by an answer (consisting of additional radiographs, an explanation of the radiographic abnormality and causative disease process, and one or two references).

Stoker, D.J.; Tilley, E.A.

1988-01-01

34

Can orthopedic trials change practice?  

PubMed Central

Background and purpose The impact of large, randomized trials in orthopedic surgery on surgeons' preferences for a particular surgical approach remains unclear. We surveyed surgeons to assess whether they would change practice based upon results of a large, multicenter randomized controlled hip fracture trial. Methods We conducted a cross-sectional survey among International Hip Fracture Research Collaborative (IHFRC) surgeons and surgeons who were members of Arbeitsgemeinschaft fuer Osteosynthesefragen - Association for the Study of Internal Fixation (AO/ASIF) to determine the likelihood that they would change practice based on findings of a proposed large, multicenter randomized controlled trial (the Hip Fracture Evaluation with Alternatives of Total Hip Arthroplasty versus Hemi-Arthroplasty (HEALTH) study). We asked surgeons their current preferences for the management of displaced femoral neck fractures and whether a trial that definitively revealed a substantial improvement in function and quality of life with no difference in risk of revision surgery was important and would cause them to change practice. Results Of 883 surgeons surveyed, 210 responded from IHFRC and 586 from AO/ASIF (a response rate of 90%). Most surgeons (61%) preferred hemiarthroplasty (HA) for treating displaced femoral neck fractures. 72% of responding surgeons believed that a substantial improvement in patient function with total hip arthroplasty (THA) and no adverse effects on revision surgery would be an important finding. Moreover, of 483 surgeons who preferred hemiarthroplasty, 62% would change their practice based upon the findings of the trial. Interpretation Large clinical trials in orthopedics are worthwhile endeavors, as they have the potential to change practice among surgeons. Surgeons seem willing to adopt alternative surgical approaches if the evidence is compelling and sound.

Dijkman, Bernadette G; Kooistra, Bauke W; Pemberton, Julia; Sprague, Sheila; Bhandari, Mohit

2010-01-01

35

Carbon nanostructures for orthopedic medical applications.  

PubMed

Carbon nanostructures (including carbon nanofibers, nanostructured diamond, fullerene materials and so forth) possess extraordinary physiochemical, mechanical and electrical properties attractive to bioengineers and medical researchers. In the past decade, numerous developments towards the fabrication and biological studies of carbon nanostructures have provided opportunities to improve orthopedic applications. Therefore, the aim of this article is to provide an up-to-date review on carbon nanostructure advances in orthopedic research. Orthopedic medical device applications of carbon nanotubes/carbon nanofibers and nanostructured diamond (including particulate nanodiamond and nanocrystalline diamond coatings) are emphasized here along with other carbon nanostructures that have promising potential. In addition, widely used fabrication techniques for producing carbon nanostructures in both the laboratory and in industry are briefly introduced. In conclusion, carbon nanostructures have demonstrated tremendous promise for orthopedic medical device applications to date, and although some safety, reliability and durability issues related to the manufacturing and implantation of carbon nanomaterials remain, their future is bright. PMID:21929458

Yang, Lei; Zhang, Lijuan; Webster, Thomas J

2011-09-01

36

Biology for the Visually or Orthopedically Impaired  

NSDL National Science Digital Library

The article suggests methods of working with visually and orthopedically disabled students in the biology laboratory setting to maximize their learning of basic concepts of biology and how to use the scientific method.

Dorothy Tombaugh (Euclid Senior High School;); Roy Tombaugh (;)

2006-06-07

37

Hyperbaric oxygen therapy in orthopedic conditions.  

PubMed

As is well known, the origins and development of hyperbaric medicine are closely tied to the history of diving medicine. Our HBO2 studies stemming from diving medicine date back to 1972. We concentrated our early basic research on dysbaric osteonecrosis. There are now good indications that HBO2 is helpful in a variety of orthopedic conditions. However, hyperbaric medicine in orthopedics is still relatively new and some aspects of it remain controversial. PMID:15233171

Kawashima, M; Tamura, H; Nagayoshi, I; Takao, K; Yoshida, K; Yamaguchi, T

2004-01-01

38

Underwater manipulator  

DOEpatents

Self-contained, waterproof, water-submersible, remote-controlled apparatus is described for manipulating a device, such as an ultrasonic transducer for measuring crack propagation on an underwater specimen undergoing shock testing. The subject manipulator includes metal bellows for transmittal of angular motions without the use of rotating shaft seals or O-rings. Inside the manipulator, a first stepper motor controls angular movement. In the preferred embodiment, the bellows permit the first stepper motor to move an ultrasonic transducer [plus minus]45 degrees in a first plane and a second bellows permit a second stepper motor to move the transducer [plus minus]10 degrees in a second plane orthogonal to the first. In addition, an XY motor-driven table provides XY motion.

Schrum, P.B.; Cohen, G.H.

1993-04-20

39

Underwater manipulator  

DOEpatents

Self-contained, waterproof, water-submersible, remote-controlled apparatus is provided for manipulating a device, such as an ultrasonic transducer for measuring crack propagation on an underwater specimen undergoing shock testing. The subject manipulator includes metal bellows for transmittal of angular motions without the use of rotating shaft seals or O-rings. Inside the manipulator, a first stepper motor controls angular movement. In the preferred embodiment, the bellows permit the first stepper motor to move an ultrasonic transducer .+-.45 degrees in a first plane and a second bellows permit a second stepper motor to move the transducer .+-.10 degrees in a second plane orthogonal to the first. In addition, an XY motor-driven table provides XY motion.

Schrum, Phillip B. (Clairton, PA); Cohen, George H. (Pittsburgh, PA)

1993-01-01

40

[Research and analysis to Shui nationality medicine treatment orthopedics & traumatology].  

PubMed

To investigated Shui nationality folk medicine's awareness to orthopedics & traumatology, the history of orthopedics & traumatology treatment, Shui nationality folk doctors' practicing medicine, heritage, diagnosis and treatment methods and tools, etc, through investigated drug resources category and distribution characteristics of Shui nationality medicine to orthopedics & traumatology treatment, explored and finished Shui nationality medicine orthopedics & traumatology treatment theoretical system. After more than 5 years' exploration and finishing, preliminarily formed the theoretical system framework and medicine application characteristics of Shui nationality medicine treating orthopedics & traumatology. Shui nationality medicine treatment orthopedics & traumatology has distinctive national style, and worthy to further exploration and research. PMID:23947150

Hu, Jian-Shan; Li, Pu; Yang, Yong; Chen, Xin-Chun; Lin, Li

2013-05-01

41

Bibliometric analysis of the orthopedic literature.  

PubMed

Bibliometric indicators are used to assess research performance. The goal of this study was to explore publication output to construct a picture of orthopedics that may be beneficial to researchers and orthopedic specialists. All orthopedics articles published in 61 journals from 2000 to 2011 were retrieved from the Science Citation Index Expanded database. The numbers of articles, citations, authors, institutions, and journals were analyzed and subjected to quantitative and qualitative comparisons. The number of published orthopedics articles increased between 2000 and 2011. Articles published by authors from the United States always ranked first in number, although the United States' share is decreasing in the world literature. Authors from the United States published the most-cited articles and the most articles in journals with top-10 impact factors; moreover, the United States also had the greatest share of experts and highly ranked institutions. The United Kingdom, Germany, and Japan were always within the world's top 4 in terms of numbers of articles and citations. The shares of Germany, South Korea, and China among total orthopedics articles increased, especially that of China. In 2011, China ranked the fifth in the world, with its world share increasing from 0.64% in 2000 to 5.05% in 2011. However, China lags behind in average citations per article, top research institutions, and most prolific authors. According to the total citations per article, the University of Pittsburgh, Harvard University, and the Hospital for Special Surgery were the most prolific institutions. PMID:24093695

Hui, Zhaoyang; Yi, Zhongmei; Peng, Jun

2013-10-01

42

[The manipulators].  

PubMed

During their long careers of counseling couples, Giovanna Stoll and Maurice Hurni have encountered couples in which psychological violence is exercised. Their book, ¿The Hate of Love, the Oddness of the Place,¿ explores strategies used in couples by one or both partners to subjugate the other and to be victorious in an ongoing struggle between the two. Two case examples are presented. Confronted with such deliberate meanness, health professionals long ago adopted a neutral stance on such behavior in an attempt to maintain professional distance from their clients. However, Stoll and Hurni abandoned their neutrality in the face of certain particularly brutal behaviors. The author describes Stoll and Hurni¿s professional experiences and the children of manipulative parents. The employer who pits his employees against each other is also discussed. Such manipulators are unable to have true friends, just as they are unable to live within loving, communicative relationships. They behave in calculated fashion, having only relationships which they deem to be useful and opportune. Respect, the capacity to give and receive, and empathy are alien notions to those who manipulate others. 40% of 1500 women aged 20-60 years old interviewed in a study of violence within the family report having been subjected to psychological violence during their married lives. 14% of these women report being either often or always sad. Women risk being denigrated, humiliated, harassed, controlled, and deprived. PMID:12159225

Tschui, M

1997-01-01

43

Collagen scaffolds for orthopedic regenerative medicine  

NASA Astrophysics Data System (ADS)

Collagen and collagen-based scaffolds offer distinct advantages when selected as biomaterials for use across a broad spectrum of regenerative medicine applications. However, relatively poor mechanical properties are often perceived to limit their usefulness for orthopedic applications. These problems can be overcome through enhanced crosslinking mechanisms or through the addition of a second, stiffer phase such as hydroxyapatite, thus allowing tailored composite scaffolds to meet specific tissue requirements. This overview will highlight the current state of the art of these scaffolds, and consider the exciting prospects and future directions of collagen-based technologies for orthopedic regenerative medicine.

Cunniffe, Gráinne M.; O'Brien, Fergal J.

2011-04-01

44

[Prophylaxis of venous thromboembolism in orthopedic surgery].  

PubMed

The patients undergoing major orthopedic surgery, which includes total hip replacement (THR), total knee replacement (TKR), and hip fracture surgery (HFS), represent a group that has a particularly high risk for venous thromboembolism (VTE), and routine thromboprophylaxis has been standard of care for >20 years. The following article summarizes data derived from numerous randomized clinical trials of thromboprophylaxis following THR, TKR, and HFS; areas of orthopedic surgery for which there are much less data, including knee arthroscopy and isolated lower extremity injuries, are also reviewed. PMID:20228720

Giuseppini, M U; Guiducci, S; Bardelli, M

2010-02-01

45

Between psychology and pedagogy: "moral orthopedics" and case studies of children in fin-de-siècle French medicine.  

PubMed

In the latter decades of the 19th century, European physicians debated a controversial practice that mixed placebos with suggestion therapy to treat children diagnosed with neurotic disorders and behavioral problems. Designed to optimize suggestibility in juvenile patients, this "moral orthopedics" offered parents and therapists the message that children could be saved from becoming victims of their own personalities, of familial neuroses, or even of public health problems. Case studies, published in medical journals and books, circulated accounts of innovative strategies to treat childhood hysteria and to change habits that were considered destructive. Moral orthopedics actualized the insight that suggestibility could be therapeutically productive for juvenile subjects. However, because its adherents sought to manipulate patients' behavior and health by influencing unconscious thought, moral orthopedics provoked questions of expertise and disciplinary propriety among domains of medicine, law, and philosophy. This article reconstructs the controversy surrounding moral orthopedics by examining case studies. I argue that adherents of moral orthopedics did overcome philosophical objections raised against the method, and that they did so through what physician Edgar B6rillon referred to as "education of the will." PMID:21688751

Rose, Anna Christina

2011-02-01

46

Molecular imaging promotes progress in orthopedic research  

Microsoft Academic Search

Modern orthopedic research is directed towards the understanding of molecular mechanisms that determine development, maintenance and health of musculoskeletal tissues. In recent years, many genetic and proteomic discoveries have been made which necessitate investigation under physiological conditions in intact, living tissues. Molecular imaging can meet this demand and is, in fact, the only strategy currently available for noninvasive, quantitative, real-time

Philipp Mayer-Kuckuk; Adele L. Boskey

2006-01-01

47

Injectable biodegradable materials for orthopedic tissue engineering  

Microsoft Academic Search

The large number of orthopedic procedures performed each year, including many performed arthroscopically, have led to great interest in injectable biodegradable materials for regeneration of bone and cartilage. A variety of materials have been developed for these applications, including ceramics, naturally derived substances and synthetic polymers. These materials demonstrate overall biocompatibility and appropriate mechanical properties, as well as promote tissue

Johnna S Temenoff; Antonios G Mikos

2000-01-01

48

Synthetic biodegradable polymers as orthopedic devices  

Microsoft Academic Search

Polymer scientists, working closely with those in the device and medical fields, have made tremendous advances over the past 30 years in the use of synthetic materials in the body. In this article we will focus on properties of biodegradable polymers which make them ideally suited for orthopedic applications where a permanent implant is not desired. The materials with the

John C. Middleton; Arthur J. Tipton

2000-01-01

49

Imaging of orthopedic trauma and surgery  

SciTech Connect

This book discusses imaging of orthopedia trauma and surgery. A review of the pertinent anatomy, mechanism of injury, and radiology and orthopedic classification is provided for each topic discussed. The book employs recent advances in technique and focuses on adult skeletal trauma, and joint replacement.

Berquist, T.H.

1986-01-01

50

Characteristics of highly successful orthopedic surgeons: a survey of orthopedic chairs and editors  

PubMed Central

Background Highly successful orthopedic surgeons are a small group of individuals who exert a large influence on the orthopedic field. However, the characteristics of these leaders have not been well-described or studied. Methods Orthopedic surgeons who are departmental chairs, journal editors, editorial board members of the Journal of Bone and Joint Surgery (British edition), or current or past presidents of major orthopedic associations were invited to complete a survey designed to provide insight into their motivations, academic backgrounds and accomplishments, emotional and physical health, and job satisfaction. Results In all, 152 surgeons completed the questionnaire. We identified several characteristics of highly successful surgeons. Many have contributed prolific numbers of publications and book chapters and obtained considerable funding for research. They were often motivated by a “desire for personal development (interesting challenge, new opportunities),” whereas “relocating to a new institution, financial gain, or lack of alternative candidates” played little to no role in their decisions to take positions of leadership. Most respondents were happy with their specialty choice despite long hours and high levels of stress. Despite challenges to their time, successful orthopedic surgeons made a strong effort to maintain their health; compared with other physicians, they exercise more, are more likely to have a primary care physician and feel better physically. Conclusion Departmental chairs, journal editors and presidents of orthopedic associations cope with considerable demands of clinical, administrative, educational and research duties while maintaining a high level of health, happiness and job satisfaction.

Klein, Guy; Hussain, Nasir; Sprague, Sheila; Mehlman, Charles T.; Dogbey, Godwin; Bhandari, Mohit

2013-01-01

51

Manipulating Graphene  

NASA Astrophysics Data System (ADS)

Graphene is both strong and flexible, making it a promising material for nanoscale hinges and other three-dimensional structures. Using sacrificial layers and surfactants, we are able to demonstrate control over the adhesion of monolayer graphene to a substrate. By patterning gold on the surface of the graphene, we created arrays of rigid pads bridged by graphene strips that can be decoupled from the surface in an aqueous environment. The pads allow us to manipulate the graphene both on and off the surface using lasers or micromanipulators. Our methods yield fundamental material data on graphene such as the macroscopic bending stiffness, and demonstrate the feasibility of a graphene hinge. We are currently exploring the use of magnetic control as a method for applying forces to stretch and fold graphene. We have already created micron-sized permanent magnets made of iron and successfully released them from the substrate, and are now integrating them into graphene devices.

Ruyack, Alexander; Blees, Melina; Roberts, Samantha; Martin, Chris; Barnard, Arthur; McEuen, Paul L.

2013-03-01

52

Manipulating Representations.  

PubMed

The present paper proposes a definition for the complex polysemic concepts of consciousness and awareness (in humans as well as in other species), and puts forward the idea of a progressive ontological development of consciousness from a state of 'childhood' awareness, in order to explain that humans are not only able to manipulate objects, but also their mental representations. The paper builds on the idea of qualia intended as entities posing regular invariant requests to neural processes, trough the permanence of different properties. The concept of semantic differential introduces the properties of metaphorical qualia as an exclusively human ability. Furthermore this paper proposes a classification of qualia, according to the models-with different levels of abstraction-they are implied in, in a taxonomic perspective. This, in turn, becomes a source of categorization of divergent representations, sign systems, and forms of intentionality, relying always on biological criteria. New emerging image-of-the-world-devices are proposed, whose qualia are likely to be only accessible to humans: emotional qualia, where emotion accounts for the invariant and dominant property; and the qualic self where continuity, combined with the oneness of the self, accounts for the invariant and dominant property. The concept of congruence between different domains in a metaphor introduces the possibility of a general evaluation of truth and falsity of all kinds of metaphorical constructs, while the work of Matte Blanco enables us to classify conscious versus unconscious metaphors, both in individuals and in social organizations. PMID:22347988

Recchia-Luciani, Angelo N M

2011-05-20

53

Bone Adhesives in Trauma and Orthopedic Surgery  

Microsoft Academic Search

Adhesives, especially bone adhesives, are resorbed and degraded to non-toxic products after fulfilling their function in contact\\u000a with the living organism. The use of such bone adhesives has found growing interest in all fields of medicine in the last\\u000a 50 years. The dream of trauma and orthopedic surgeons for alternatives to osteosynthesis and pins is reflected in the development\\u000a of

Christian Heiss; Ralf Kraus; Dominique Schluckebier; Ann-Christin Stiller; Sabine Wenisch; Reinhard Schnettler

2006-01-01

54

Ceramics for Prosthetic Application- Orthopedic, Dental and Cardiovascular.  

National Technical Information Service (NTIS)

Contents: Biological, chemical, and structural criteria for use of ceramics in biological systems; Ceramics for bone repair (orthopedic) applications; Ceramics for dental applications; Ceramics for cardiovascular applications.

D. E. Niesz V. J. Tennery

1974-01-01

55

Orthopedic surgery in the United States Army: a historical review.  

PubMed

The contribution of American military surgeons to the development of orthopedic surgery has not previously been explored. The experiences of American military surgeons in conflicts from the Civil War to Iraq and Afghanistan have advanced the orthopedic discipline, resulting in important developments within the field, as well as scientific discoveries that have benefited both the civilian and military communities. From advances in wound care, to spinal surgery, intramedullary nailing of long bone fractures, and external fixation, American military surgeons have been pioneers of orthopedic surgery. The goal of this review was to survey the American military orthopedic experience from the American Revolution to the wars in Iraq and Afghanistan. PMID:21702390

Schoenfeld, Andrew J

2011-06-01

56

[The prevention of postoperative deep venous thrombosis in orthopedic surgery].  

PubMed

In a non-comparative prospective trial, efficacy was studied of the use of clexane (enoxiparin) in the prophylaxis of the lower limb deep vein thrombosis and the pulmonary artery thromboembolism in orthopedic surgery. Enrolled in the study were 48 orthopedic patients. Kinds of operations performed included total hip arthroplasty (n = 40), total knee arthroplasty (n = 2), other challenging orthopedic operations (n = 6). Analysis of results of the treatment having been undergone by the patients revealed no case of thrombosis of lower limb deep veins or hemorrhagic complications. Thus, clexane is an effective and reliable prophylaxis modality for thromboembolic complications in orthopedic surgery. PMID:10626456

Rybachuk, O I; Besiedyns'ky?, S M; Huliaiev, D V

1999-09-01

57

Orthopedic Resident Anatomy Review Course: A Collaboration between Anatomists and Orthopedic Surgeons  

ERIC Educational Resources Information Center

|A challenge for new residents and senior residents preparing for board examinations is refreshing their knowledge of basic science disciplines, such as human gross anatomy. The Department of Orthopaedics at the University of Utah School of Medicine has for many years held an annual Orthopedic Resident Anatomy Review Course during the summer…

DeFriez, Curtis B.; Morton, David A.; Horwitz, Daniel S.; Eckel, Christine M.; Foreman, K. Bo; Albertine, Kurt H.

2011-01-01

58

Prevention of VTE in Orthopedic Surgery Patients  

PubMed Central

Background: VTE is a serious, but decreasing complication following major orthopedic surgery. This guideline focuses on optimal prophylaxis to reduce postoperative pulmonary embolism and DVT. Methods: The methods of this guideline follow those described in Methodology for the Development of Antithrombotic Therapy and Prevention of Thrombosis Guidelines: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines in this supplement. Results: In patients undergoing major orthopedic surgery, we recommend the use of one of the following rather than no antithrombotic prophylaxis: low-molecular-weight heparin; fondaparinux; dabigatran, apixaban, rivaroxaban (total hip arthroplasty or total knee arthroplasty but not hip fracture surgery); low-dose unfractionated heparin; adjusted-dose vitamin K antagonist; aspirin (all Grade 1B); or an intermittent pneumatic compression device (IPCD) (Grade 1C) for a minimum of 10 to 14 days. We suggest the use of low-molecular-weight heparin in preference to the other agents we have recommended as alternatives (Grade 2C/2B), and in patients receiving pharmacologic prophylaxis, we suggest adding an IPCD during the hospital stay (Grade 2C). We suggest extending thromboprophylaxis for up to 35 days (Grade 2B). In patients at increased bleeding risk, we suggest an IPCD or no prophylaxis (Grade 2C). In patients who decline injections, we recommend using apixaban or dabigatran (all Grade 1B). We suggest against using inferior vena cava filter placement for primary prevention in patients with contraindications to both pharmacologic and mechanical thromboprophylaxis (Grade 2C). We recommend against Doppler (or duplex) ultrasonography screening before hospital discharge (Grade 1B). For patients with isolated lower-extremity injuries requiring leg immobilization, we suggest no thromboprophylaxis (Grade 2B). For patients undergoing knee arthroscopy without a history of VTE, we suggest no thromboprophylaxis (Grade 2B). Conclusions: Optimal strategies for thromboprophylaxis after major orthopedic surgery include pharmacologic and mechanical approaches.

Francis, Charles W.; Johanson, Norman A.; Curley, Catherine; Dahl, Ola E.; Schulman, Sam; Ortel, Thomas L.; Pauker, Stephen G.; Colwell, Clifford W.

2012-01-01

59

Second consultant opinion for elective orthopedic surgery.  

PubMed Central

We abstracted records of 369 patients whose recommendations for elective orthopedic surgery were not confirmed by a second opinion consultant. Six months or more after the initial recommendation for surgery, 82 per cent had not had the operation performed, irrespective of the diagnosis and the characteristics of the physician recommending surgery. Reasons for consultant non-confirmation included: use of a cast, brace, or corrective footwear preferable (26.3 per cent), symptoms not severe enough (18.4 per cent), and physical therapy/exercises preferable (17.8 per cent).

McCarthy, E G; Finkel, M L

1981-01-01

60

Imaging of orthopedic trauma and surgery  

SciTech Connect

This book presents papers on imaging techniques for diagnosis of trauma of bones. A comparative evaluation is presented for planning of proper diagnosis and treatment. Various techniques discussed are routine radiography; computerized tomography, NMR imaging, angiography, ultrasonography; and use of radioisotopes. The mechanism of injury of bone joints of upper and lower limbs and spine is discussed after discussing the anatomy of each in the beginning of each paper. Topics titled are healing of fractures; fractures of pelvis; knee; shoulder; foot and ankle; fractures of humerus; stress fractures; and orthopedic radiology. Prosthesis use and plastic surgery of joints is also discussed.

Berquist, T.H.

1985-01-01

61

Discourse and manipulation  

Microsoft Academic Search

Manipulation’ is one of the crucial notions of Critical Discourse Analysis that require further theoretical analysis. This article offers a triangulated approach to manipulation as a form of social power abuse, cognitive mind control and discursive interaction. Socially, manipulation is defined as illegitimate domination confirming social inequality. Cognitively, manipulation as mind control involves the interference with processes of understanding, the

Teun A. VanDijk

2006-01-01

62

Young Children's Attitudes toward Orthopedic and Sensory Disabilities.  

ERIC Educational Resources Information Center

|Attitudes of 64 nondisabled children (three to seven years old) toward orthopedic and sensory disabilities were examined via the Test of Early Attitudes toward Disability. Responses indicated that bias against orthopedic and sensory disabilities increases with age but is not present among three-year-olds. (Author/CL)|

DeGrella, Lanier H.; Green, Virginia P.

1984-01-01

63

CRIGOS: a compact robot for image-guided orthopedic surgery  

Microsoft Academic Search

The CRIGOS (compact robot for image-guided orthopedic surgery) project was set up for the development of a compact surgical robot system for image-guided orthopedic surgery based on user requirements. The modular system comprises a compact parallel robot and a software system for planning of surgical interventions and for supervision of the robotic device. Because it is not sufficient to consider

Guido Brandt; Andreas Zimolong; Lionel Carrat; Philippe Merloz; Hans-Walter Staudte; Stéphane Lavallée; Klaus Radermacher; Günther Rau

1999-01-01

64

Learning Blood Management in Orthopedic Surgery through Gameplay  

Microsoft Academic Search

Orthopedic surgery treats the musculoskeletal system, in which bleeding is common and can be fatal. To help train future surgeons in this complex practice, researchers designed and implemented a serious game for learning orthopedic surgery. The game focuses on teaching trainees blood management skills, which are critical for safe operations. Using state-of-the-art graphics technologies, the game provides an interactive and

Jing Qin; Yim-Pan Chui; Wai-Man Pang; Kup-Sze Choi; Pheng-Ann Heng

2010-01-01

65

Analysis of NHSLA claims in orthopedic surgery.  

PubMed

National Health Service (NHS) statistics in the United Kingdom demonstrate an increase in clinical negligence claims over the past 30 years. Reasons for this include elements of a cultural shift in attitudes toward the medical profession and the growth of the legal services industry. This issue affects medical and surgical health providers worldwide.The authors analyzed 2117 NHS Litigation Authority (NHSLA) orthopedic surgery claims between 1995 and 2001 with respect to these clinical areas: emergency department, outpatient care, surgery (elective or trauma operations), and inpatient care. The authors focused on the costs of settling and defending claims, costs attributable to clinical areas, common causes of claims, and claims relating to elective or trauma surgery. Numbers of claims and legal costs increased most notably in surgery (elective and trauma) and in the emergency department. However, claims are being defended more robustly. The annual cost for a successful defense has remained relatively stable, showing a slight decline. The common causes of claims are postoperative complication; wrong, delayed, or failure of diagnosis; inadequate consent; and wrong-site surgery. Certain surgical specialties (eg, spine and lower-limb surgery) have the most claims made during elective surgery, whereas upper-limb surgery has the most claims made during trauma surgery.The authors recommend that individual trusts liaise with orthopedic surgeons to devise strategies to address areas highlighted in our study. Despite differences in health care systems worldwide, the underlying issues are common. With improved understanding, physicians can deliver the service they promise their patients. PMID:22588416

Khan, Irfan H; Jamil, Wiqqas; Lynn, Sam Mathew; Khan, Osman H; Markland, Kate; Giddins, Grey

2012-05-01

66

Biomaterial systems for orthopedic tissue engineering  

NASA Astrophysics Data System (ADS)

The World Health Organization has estimated that one out of seven Americans suffers from a musculoskeletal impairment, annually incurring 28.6 million musculoskeletal injuries---more than half of all injuries. Bone tissue engineering has evolved rapidly to address this continued health concern. In the last decade, the focus of orthopedic biomaterials design has shifted from the use of common engineering metals and plastics to smart materials designed to mimic nature and elicit favorable bioresponse. Working within this new paradigm, this thesis explores unique chemical and materials systems for orthopedic tissue engineering. Improving on current titanium implant technologies, porous titanium scaffolds were utilized to better approximate the mechanical and structural properties of natural bone. These foam scaffolds were enhanced with bioactive coatings, designed to enhance osteoblastic implant colonization. The biopolymer poly(L-lysine) was incorporated into both hydroxypatite and octacalcium phosphate mineral phases to create modified organoapatite and pLys-CP coatings respectively. These coatings were synthesized and characterized on titanium surfaces, including porous structures such as titanium mesh and titanium foam. In addition, in vitro osteoblastic cell culture experiments probed the biological influences of these coatings. Organoapatite (OA) accelerated preosteoblastic colonization of titanium mesh and improved cellular ingrowth into titanium foam. Alternatively, the thin, uniform pLys-CP coating demonstrated significant potential as a substrate for chemically binding biological molecules and supramolecular assemblies. Biologically, pLys-CP demonstrated enhanced cellular attachment over titanium and inorganic calcium phosphate controls. Supramolecular self-assembled nanofiber assemblies were also explored both as stand-alone tissue engineering gels and as titanium coatings. Self-supporting nanofiber gels induced accelerated, biomimetic mineralization. Osteoblasts encapsulated in mineralizing gels became dormant, down-regulating glucose-lactate metabolism, cell proliferation, and alkaline phosphatase expression. Still viable, though, these cells up-regulated cell proliferation and alkaline phosphatase expression upon release from the gel. These self-assembled nanofibers were also applied to titanium surfaces, where they influenced calcium phosphate nucleation and growth on those surfaces. Each of these materials systems is the product of a valuable integration of materials science, chemistry, and medicine. By creatively combining elements of these different disciplines, it is possible to design new and exciting approaches to orthopedic tissue engineering.

Spoerke, Erik David

2003-06-01

67

Bioactive glass coatings for orthopedic metallic implants  

SciTech Connect

The objective of this work is to develop bioactive glass coatings for metallic orthopedic implants. A new family of glasses in the SiO2-Na2O-K2O-CaO-MgO-P2O5 system has been synthesized and characterized. The glass properties (thermal expansion, softening and transformation temperatures, density and hardness) are in line with the predictions of established empirical models. The optimized firing conditions to fabricate coatings on Ti-based and Co-Cr alloys have been determined and related to the glass properties and the interfacial reactions. Excellent adhesion to alloys has been achieved through the formation of 100-200 nm thick interfacial layers (Ti5Si3 on Ti-based alloys and CrOx on Co-Cr). Finally, glass coatings, approximately 100 mu m thick, have been fabricated onto commercial Ti alloy-based dental implants.

Lopez-Esteban, Sonia; Saiz, Eduardo; Fujino, Sigheru; Oku, Takeo; Suganuma, Katsuaki; Tomsia, Antoni P.

2003-06-30

68

Overview of orthopedic shock wave devices  

NASA Astrophysics Data System (ADS)

This presentation will cover the various types of shock wave devices that are known to have completed serious patient studies for orthopedic applications. This will include high energy and low energy instruments, as well as focused and unfocused devices, and the method which each device uses to generate a shockwave. The presentation will not be limited only to those devices that have been FDA approved, but will include those that are currently in trials or are expected to begin trials with the FDA in the near future. The power of the equipment, the applications, and the number of treatment sessions generally used will be examined. Some of the devices which are evaluated in particular are the equipment from HMT, Dornier, Siemens, and Storz.

Brown, Roy; Schultheiss, Reiner

2003-10-01

69

Application of Stem Cells in Orthopedics  

PubMed Central

Stem cell research plays an important role in orthopedic regenerative medicine today. Current literature provides us with promising results from animal research in the fields of bone, tendon, and cartilage repair. While early clinical results are already published for bone and cartilage repair, the data about tendon repair is limited to animal studies. The success of these techniques remains inconsistent in all three mentioned areas. This may be due to different application techniques varying from simple mesenchymal stem cell injection up to complex tissue engineering. However, the ideal carrier for the stem cells still remains controversial. This paper aims to provide a better understanding of current basic research and clinical data concerning stem cell research in bone, tendon, and cartilage repair. Furthermore, a focus is set on different stem cell application techniques in tendon reconstruction, cartilage repair, and filling of bone defects.

Schmitt, Andreas; van Griensven, Martijn; Imhoff, Andreas B.; Buchmann, Stefan

2012-01-01

70

The management of complex orthopedic injuries.  

PubMed

As advancements are made in the prevention of automobile fatalities, an increase in the incidence of pelvic and lower extremity injuries has occurred. These remain the leading causes of impairment and loss of years of productive life. Pelvic trauma has a high initial mortality rate when severe. However, with early resuscitation and transport, more survivors arrive in our trauma centers harboring these injuries. Owing to early stabilization and mobilization of the traumatized patient, a decrease in complications in these patients has been noted. Both the trauma surgeon and the orthopedic trauma surgeon should work as a team and remain in continuous communication during the treatment of these patients. Open fractures are among the most difficult problems to manage; early and aggressive decisions can prevent a lifetime of complications and physical impairment. As previously stated, to obtain good outcomes, open fractures must be treated initially at the accident scene followed by timely transport to the trauma center for definitive care. It must be remembered that the golden time to prevent major complications is 6 hours. Intra-articular fractures of the lower extremity involve a major weight bearing joint. Post-traumatic arthritis and impairment develop in joints where joint congruity is not achieved. To preserve normal function, there should be articular congruity, stable fixation, axial alignment with the rest of the extremity, and restoration of full range of motion. Immediate stabilization of long bone fractures has many advantages in the multiply injured patient, such as improved long-term function, prevention of deep venous thrombosis and decubitus ulcer, decreased need for analgesia, and reduction in the incidence of adult respiratory distress syndrome and fat emboli. Patients with femoral shaft fractures should undergo immediate stabilization of the fracture within 24 hours of injury. We have presented a series of orthopedic injuries that have high mortality and high morbidity which, if not treated expediently, yield a high degree of impairment. PMID:8782479

Alonso, J E; Lee, J; Burgess, A R; Browner, B D

1996-08-01

71

Twitter as a communication tool for orthopedic surgery.  

PubMed

Twitter is a social networking Web site that has changed the way information is communicated. This study involved identifying, categorizing, and reviewing orthopedic Twitter profiles. A total of 412 profiles were identified. Of those, 176 (50.3%) were surgeons; 89 (50.5%) were based in the United States and 77 (43.8%) were not (10 unclassified). Most surgeons were young; 66% of surgeons were board certified within the past 10 years. Only a small percentage of orthopedic surgeons and practices currently use Twitter, but the use of social networking for orthopedic communication is likely to play an increasing role in future clinical practice. PMID:22050252

Franko, Orrin I

2011-11-01

72

Venous Thromboembolism Prophylaxis in Orthopedic Surgery. Clinician Research Summary.  

National Technical Information Service (NTIS)

A systematic review of 179 articles published between January 1980 and May 2011 sought to determine the comparative effectiveness, benefits, and adverse effects of venous thromboembolism (VTE) prophylaxis for patients undergoing orthopedic surgery. The re...

2012-01-01

73

The Effects of Standardized Feedback on Orthopedic Patient Evaluation Skills.  

ERIC Educational Resources Information Center

|A study examined whether there are performance differences between surgery clerks provided corrective reinforcement on orthopedic history and physical examination write-ups and those assessed by traditional feedback means when both groups are exposed to the feedback instrument. (MLW)|

DaRosa, Debra A.; And Others

1984-01-01

74

45 CFR 1308.12 - Eligibility criteria: Orthopedic impairment.  

Code of Federal Regulations, 2012 CFR

...to Public Welfare (Continued) OFFICE OF HUMAN DEVELOPMENT SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES THE ADMINISTRATION FOR CHILDREN...learning. An orthopedic impairment involves muscles, bones, or joints and is...

2012-10-01

75

45 CFR 1308.12 - Eligibility criteria: Orthopedic impairment.  

Code of Federal Regulations, 2011 CFR

...to Public Welfare (Continued) OFFICE OF HUMAN DEVELOPMENT SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES THE ADMINISTRATION FOR CHILDREN...learning. An orthopedic impairment involves muscles, bones, or joints and is...

2011-10-01

76

Shape-Memory Materials: Possible Uses in the Orthopedic Field.  

National Technical Information Service (NTIS)

The properties of shape-memory materials--capable of regaining an initial preimposed shape and thus of developing a preprogrammed state of stress (tension or compression)--are examined, especially those usable for orthopedic applications. The alloys of th...

G. Airoldi L. Parrini

1981-01-01

77

Clinical and economic consequences of bleeding following major orthopedic surgery  

Microsoft Academic Search

BackgroundMajor orthopedic surgery patients who receive antithrombotics as prophylaxis against VTE may be at higher risk of bleeding. The clinical and economic consequences of this complication may be relevant to therapeutic decision-making.

Montserrat Vera-Llonch; May Hagiwara; Gerry Oster

2006-01-01

78

Passive navigation principle for orthopedic interventions with MR fluoroscopy  

Microsoft Academic Search

Introduction  Of late, computer-assisted surgery has become a novel challenge for orthopedic surgeons. However, for orthopedic interventions\\u000a magnetic resonance (MR) fluoroscopy is in its early stages of development. The authors have developed an innovative passive\\u000a navigation concept, which is potentially applicable for many magnetic resonance image (MRI)-guided musculoskeletal interventions.\\u000a With this method, no switching between different planes is required, since the

Hermann J. Bail; Ulf K. M. Teichgräber; Florian Wichlas; Jens C. Rump; Thula Walter; Christian J. Seebauer

2010-01-01

79

Orthopedic injuries associated with backyard trampoline use in children  

PubMed Central

Introduction Trampolining on an outdoor oval or circular trampoline is a popular activity for children but is associated with a number of orthopedic injuries, especially in children between the ages of 5 and 15 years. In this paper we review the orthopedic injuries in children associated with backyard trampoline use, through our experience with a series of children admitted to the Winnipeg Children's Hospital, the only tertiary care pediatric centre in Manitoba. Methods We reviewed the charts, x-ray films and operative reports for 80 children under 16 years old (mean 9 yr, with 14 [18%] children between 2 and 4 yr) with an orthopedic injury sustained when using a trampoline in the backyard. We noted the mechanism of injury and type and severity of orthopedic injury sustained. Results Fifty-two (65%) children were injured on the trampoline mat, and 24 (30%) were injured when they were ejected from the trampoline. Sixty (75%) children sustained a fracture or fracture-dislocation. Forty-eight (80%) orthopedic injuries occurred in the upper extremity. No child died as a result of a trampoline injury. Conclusion The use of the “backyard” trampoline by young children can cause significant orthopedic injury.

Black, G. Brian; Amadeo, Ryan

2003-01-01

80

Evolution of manipulated behavior.  

PubMed

Abstract Many social behaviors are triggered by social partners. For example, cells in a multicellular organism often become soma via extrinsically regulated differentiation, while individuals in a eusocial colony often become helpers via extrinsic caste determination. One explanation for social triggering is that it informs when it is beneficial to express the behavior. Alternatively, social triggering can represent manipulation where social partners partially or completely control the focal individual's behavior. For instance, caste determination in primitively eusocial taxa is typically accomplished via differential feeding or dominance hierarchies, suggesting some manipulation. However, selection would favor resistance if manipulation is detrimental to manipulated parties, and the outcome of the manipulation conflict remains intricate. We analyze the coevolution of manipulation and resistance in a simple but general setting. We show that, despite possible resistance, manipulated behavior can be established under less stringent conditions than spontaneous (i.e., nonmanipulated) behavior because of resistance costs. The existence of this advantage might explain why primitive eusocial behavior tends to be triggered socially and coercively. We provide a simple condition for the advantage of manipulated behavior that may help infer whether a socially triggered behavior is manipulated. We illustrate our analysis with a hypothetical example of maternal manipulation relevant to primitive eusociality. PMID:24021397

González-Forero, Mauricio; Gavrilets, Sergey

2013-08-20

81

[Dento-facial orthopedics and osteopathy].  

PubMed

Osteopathy has grown rapidly. Given their common action on children and adolescents, the collaboration between dentofacial orthopedics and osteopathy is increasingly common. It therefore becomes necessary and urgent to investigate whether, based on data acquired from science, there is evidence of possible interrelations between the two disciplines. After reviewing the literature, very few scientific publications demonstrate the utility of osteopathy and its relationships with other disciplines. However, the relationship between occlusion and posture seem relatively proven, especially in the sagittal direction. On the other hand, although the mobility of the cranial bones is established, the primary respiratory motion is still subject to controversy, even among osteopaths. This, even as orthodontics has long been accused of countering the primary respiratory motion of cranial bones (PRM). Today osteopaths do not reject orthodontics anymore, because the return to a physiological bite situation is considered beneficial. According to expert opinion (without proof, however), some orthodontic devices (like headgears) which block the sutures are still to be avoided and require appropriate monitoring osteopathy. The controversy over the adverse effects of orthodontic treatment is becoming more nuanced by osteopaths, and modern orthodontics claiming a «global» approach of patient, collaboration may be possible in future year. PMID:22105682

Fournier, Romain; Aknin, Jean-Jacques; Bourgier, Sophie; Gebeile-Chauty, Sarah

2011-11-23

82

Innovative magnetic scaffolds for orthopedic tissue engineering.  

PubMed

The use of magnetism in tissue engineering is a very promising approach, in fact magnetic scaffolds are able not only to support tissue regeneration, but they can be activated and work like a magnet attracting functionalized magnetic nanoparticles (MNPs) injected close to the scaffold enhancing tissue regeneration. This study aimed to assess the in vivo biocompatibility and osteointegrative properties of novel magnetic scaffolds. Two hydroxyapatite/collagen (70/30 wt %) magnetic scaffolds were magnetized with two different techniques: direct nucleation of biomimetic phase and superparamagnetic nanoparticles (MNPs) on self-assembling collagen fibers (MAG-A) and scaffold impregnation in ferro-fluid solution (MAG-B). Magnetic scaffolds were implanted in rabbit distal femoral epiphysis and tibial mid-diaphysis. Histopathological screening showed no inflammatory reaction due to MNPs. Significantly higher bone healing rate (?BHR) results were observed in MAG-A in comparison to MAG-B. Significant differences were also found between experimental times with an increase in ?BHR from 2 to 4 weeks for both scaffolds in trabecular bone, while only for MAG-B (23%, p < 0.05) in cortical bone. The proposed magnetic scaffolds seem to be promising for magnetic guiding in orthopedic tissue engineering applications and they will be suitable to treat also several pathologies in regenerative medicine area. PMID:22499413

Panseri, S; Russo, A; Giavaresi, G; Sartori, M; Veronesi, F; Fini, M; Salter, D M; Ortolani, A; Strazzari, A; Visani, A; Dionigi, C; Bock, N; Sandri, M; Tampieri, A; Marcacci, M

2012-04-12

83

The white blood cell scan in orthopedics  

SciTech Connect

A new nuclear scanning technique was found more specific for bone, joint, and soft tissue infections than any previously described scanning technique. The leukocyte scan, whereby a patient's own cells are labeled with a radioactive tagging agent (/sup 111/In oxine), can distinguish an active infectious process from other pain-inducing conditions. Ninety-seven /sup 111/In labeled autologous leukocyte scans were performed in 88 patients. The findings in 17 of 40 patients scanned for possible acute osteomyelitis, six of nine for suspected septic arthritis, and six for possible soft tissue infections, were positive. Subsequent clinical courses verified the infectious nature of these processes in all patients. Patients who had chronic osteomyelitis (14), bony metastases (four patients), heterotopic ossification (three), and degenerative arthritis (two) demonstrated negative findings. Of the seven patients scanned for acute long-bone fractures, one demonstrated positive findings. Nine scans demonstrated positive findings without determined causes. The leukocyte scan is a useful addition to the diagnostic tools of the orthopedic surgeon.

Propst-Proctor, S.L.; Dillingham, M.F.; McDougall, I.R.; Goodwin, D.

1982-08-01

84

Giant Optical Manipulation  

NASA Astrophysics Data System (ADS)

We demonstrate a new principle of optical trapping and manipulation increasing more than 1000 times the manipulation distance by harnessing strong thermal forces while suppressing their stochastic nature with optical vortex beams. Our approach expands optical manipulation of particles into a gas media and provides a full control over trapped particles, including the optical transport and pinpoint positioning of ˜100?m objects over a meter-scale distance with ±10?m accuracy.

Shvedov, Vladlen G.; Rode, Andrei V.; Izdebskaya, Yana V.; Desyatnikov, Anton S.; Krolikowski, Wieslaw; Kivshar, Yuri S.

2010-09-01

85

Manipulators in teleoperation  

SciTech Connect

Teleoperated manipulators represent a mature technology which has evolved over nearly 40 years of applications experience. The wide range of manipulator concepts developed thus far reflect differing applications, priorities, and philosophies. The technology of teleoperated manipulators is in a rapid state of change (just as are industrial robotics) fueled by microelectronics and materials advances. Large strides in performance and dexterity are now practical and advantageous. Even though improved controls and sensory feedback will increase functionality, overall costs should be reduced as manipulator fabrication and assembly labor costs are reduced through improved manufacturing technology. As these advances begin to materialize, broader applications in nonnuclear areas should occur.

Hamel, W.R.

1985-01-01

86

Manipulator mounted transfer platform  

DOEpatents

This invention is comprised of a transfer platform for the conveyance of objects by a manipulator includes a bed frame and saddle clamp secured along an edge of the bed fame and adapted so as to secure the bed frame to a horizontal crosspiece of the manipulator. The platform may thus move with the manipulator in a reciprocal linear path defined by a guide rail. A bed insert may be provided for the support of conveyed objects and a lifting bail may be provided to permit the manipulator arm to install the bed frame upon the crosspiece under remote control. 5 figs.

Dobbins, J.C.; Hoover, M.A.; May, K.W.; Ross, M.J.

1988-10-12

87

Manipulator mounted transfer platform  

DOEpatents

A transfer platform for the conveyance of objects by a manipulator includes a bed frame and saddle clamp secured along an edge of the bed frame and adapted so as to secure the bed frame to a horizontal crosspiece of the manipulator. The platform may thus move with the manipulator in a reciprocal linear path defined by a guide rail. A bed insert may be provided for the support of conveyed objects and a lifting bail may be provided to permit the manipulator arm to install the bed frame upon the crosspiece under remote control.

Dobbins, James C. (Idaho Falls, ID); Hoover, Mark A. (Idaho Falls, ID); May, Kay W. (Idaho Falls, ID); Ross, Maurice J. (Pocatello, ID)

1990-01-01

88

[Evolution on rotation manipulation].  

PubMed

Through review of ancient literature, the developing history of rotation manipulation is traced, various rotation manipulation techniques in different historical periods are analyzed, and evolution process of rotation manipulation is also summarized. It is found that uni-direction rotation was mainly adopted before the establishment of the Republic of China (1911). Influenced by Japanese technique, back and fro rotation took place of the uni-direction rotation, and became the mainstay of the rotation manipulations. However, it is held that the uni-direction rotation has stronger stimulative effects as well as soft tissue relaxation effect, which can be applied for treatment of various diseases. PMID:24032195

Zhang, Yi

2013-07-01

89

Orthopedic manifestations and implications for individuals with Costello syndrome.  

PubMed

Costello syndrome is a rare genetic condition caused by heterozygous alterations in HRAS and characterized by multi-system abnormalities. Individuals with Costello syndrome usually present with severe feeding difficulties in infancy, short stature, coarse facial features, increased tumor risks, cardiac and neurological complications, intellectual disability and orthopedic complications. This study further defines the orthopedic manifestations affecting individuals with Costello syndrome. We studied 43 participants and performed medical records review, clinical examinations and orthopedic inquiry forms. In 23 participants, hip and or spinal imaging assessments were completed. Serial radiographs were analyzed when available. A total of 25 orthopedic manifestations were identified. Ten manifestations were seen in the majority of the participants: hypotonia (87%), ligamentous laxity (85%), scoliosis (63%), kyphosis (58%), characteristic hand deformities (85%), ulnar deviation of the wrist (63%), elbow (55%) and shoulder contractures (65%), tight Achilles tendon (73%), and pes planus (53%). Other characteristics of special note were hip dysplasia (45%), foot deformities requiring surgical intervention (38%) and osteopenia/osteoporosis (47%). We also studied the development of the hips and spine. Uni- or bilateral hip dysplasia was congenital in some, while it developed throughout childhood in others. Spinal involvement included scoliosis, kyphosis, lordosis, and curvature reversal (thoracic lordosis and lumbar kyphosis). Based on these findings, we recommend routine referral to an orthopedic surgeon as well as instituting screening protocols for hips and spine for individuals with Costello syndrome. PMID:23813656

Detweiler, Stacey; Thacker, Mihir M; Hopkins, Elizabeth; Conway, Laura; Gripp, Karen W

2013-06-27

90

[The German Orthopedics Society 1918-1932. Developments and trends].  

PubMed

The German Orthopedic Society was founded in 1901. The period between 1918 and 1932 was characterized by the aftermath of World War I. Up to the middle of the 2nd decade, orthopedic surgeons mainly treated soldiers and civilians affected by the war. Almost every congress dealt with amputations and artificial limbs. At the same time, orthopedic surgery became a specialty at the German universities, legitimizing it as a subject of its own. Besides the large number of victims of the First World War who had to be treated by orthopedic surgeons, there was a second group of patients, the so-called cripples. These handicapped people had not previously been treated in general. A new law established in 1920 guaranteed the government's support for treatment and education of these patients. This law was called "Krüppel-Fürsorge-Gesetz," which entailed welfare but also resocialization of the handicapped, including their return to work. The German nation recognized the economic benefit of this law and accepted the financial burden. During this period, German orthopedic surgeons developed many important surgical techniques, diagnostic tests, and technical findings for the production of orthoses and artificial limbs. Some examples of techniques are described in the article: UVirradiation for the treatment of rickets according to K. Huldschinsky, Borggreve's rotationplasty of the leg (Umkehrplastik), hallux valgus arthroplasty according to Brandes, and Bragard's sign. PMID:11681087

Rauschmann, M A; Heine, M C; Thomann, K D

2001-10-01

91

Intrinsically motivated hierarchical manipulation  

Microsoft Academic Search

We present a framework for the programming of manipulation behavior by means of an intrinsic reward function that encourages the building of deep control knowledge. We show how this framework can be used to teach new manipulation skills in a hierarchical and incremental fashion. We demonstrate the contributions of this paper on a humanoid robot through three incremental learning stages.

Stephen Hart; Shijaj Sen; Roderic A. Grupen

2008-01-01

92

A Mobile Manipulator  

Microsoft Academic Search

This paper describes a robot that challenges the usual dis- tinction between locomotion and manipulation. This mo- bile manipulator, named the mobipulator, looks like a small car with four independently powered wheels, none of them steered. It is designed to move a piece of paper or some other laminar object about on the surface of a desk. The wheels are

Matthew T. Mason; Dinesh K. Pai; Daniela Rus; Lee R. Taylor; Michael A. Erdmann

1999-01-01

93

Cell manipulation in microfluidics.  

PubMed

Recent advances in the lab-on-a-chip field in association with nano/microfluidics have been made for new applications and functionalities to the fields of molecular biology, genetic analysis and proteomics, enabling the expansion of the cell biology field. Specifically, microfluidics has provided promising tools for enhancing cell biological research, since it has the ability to precisely control the cellular environment, to easily mimic heterogeneous cellular environment by multiplexing, and to analyze sub-cellular information by high-contents screening assays at the single-cell level. Various cell manipulation techniques in microfluidics have been developed in accordance with specific objectives and applications. In this review, we examine the latest achievements of cell manipulation techniques in microfluidics by categorizing externally applied forces for manipulation: (i) optical, (ii) magnetic, (iii) electrical, (iv) mechanical and (v) other manipulations. We furthermore focus on history where the manipulation techniques originate and also discuss future perspectives with key examples where available. PMID:23403762

Yun, Hoyoung; Kim, Kisoo; Lee, Won Gu

2013-02-13

94

Osteopathic Manipulative Treatment  

PubMed Central

Dermatological diseases, such as dysesthesia syndromes, stasis dermatoses, and hyperhidrosis are difficult to treat due to their complex etiologies. Current theories suggest these diseases are caused by physiological imbalances, such as nerve impingement, localized tissue congestion, and impaired autonomic regulation. Osteopathic manipulative therapy targets these physiological dysfunctions and may serve as a beneficial therapeutic option. Osteopathic manipulative therapy techniques include high velocity low amplitude, muscle energy, counterstrain, myofascial release, craniosacral, and lymphatic drainage. An osteopathic manipulative therapy technique is chosen based on its physiological target for a particular disease. Osteopathic manipulative therapy may be useful alone or in combination with standard therapeutic options. However, due to the lack of standardized trials supporting the efficacy of osteopathic manipulative therapy treatment for dermatological disease, randomized, well-controlled studies are necessary to confirm its therapeutic value.

Campbell, Shannon M.; Walkowski, Stevan

2012-01-01

95

Manipulator comparative testing program  

SciTech Connect

The Manipulator Comparative Testing Program examined differences among manipulator systems from the United States and Japan. The manipulator systems included the Meidensha BILARM 83A, the Model M-2 of Central Research Laboratories Division of Sargent Industries (CRL), and the GCA Corporation PaR Systems Model 6000. The site of testing was the Remote Operations Maintenance Demonstration (ROMD) facility, operated by the Fuel Recycle Division in the Consolidated Fuel Reprocessing Program at the Oak Ridge National Laboratory (ORNL). In all stages of testing, operators using the CRL Model M-2 manipulator had consistently lower times to completion and error rates than they did using other machines. Performance was second best with the Meidensha BILARM 83A in master-slave mode. Performance with the BILARM in switchbox mode and the PaR 6000 manipulator was approximately equivalent in terms of criteria recorded in testing. These data show no impact of force reflection on task performance.

Draper, J.V.; Handel, S.J.; Sundstrom, E.; Herndon, J.N.; Fujita, Y.; Maeda, M.

1986-01-01

96

An Overview of Dexterous Manipulation  

Microsoft Academic Search

Presents an overview of research in dexterous manipulation. We first define robotic dexterous manipulation in comparison to traditional robotics and human manipulation. Next, kinematics, contact types and forces are used to formulate the dexterous manipulation problem. Dexterous motion planning is described, which includes grasp planning and quality measures. We look at mid- and low-level control frameworks, and then compare manipulation

Allison M. Okamura; Niels Smaby; Mark R. Cutkosky

2000-01-01

97

Mesenchymal stem cell therapy in horses: useful beyond orthopedic injuries?  

PubMed

In the past decade, mesenchymal stem cells (MSC) have received much attention in equine veterinary medicine. The first therapeutic use of equine MSC was reported in 2003. Since then, the clinical application of MSC has been exploding with thousands of horses now treated worldwide. At present, MSC are mainly used in veterinary medicine to treat musculoskeletal diseases based on their ability to differentiate into various tissues of mesodermal origin. This is in marked contrast to human medicine, where MSC therapies are primarily focused on immune-mediated, inflammatory, and ischemic diseases. In this review, both orthopedic as well as non-orthopedic clinical applications of equine MSC are discussed. A brief overview is provided on the potential of MSC for non-orthopedic injuries with emphasis on those diseases, which occur in both humans and horses. PMID:23697553

De Schauwer, Catharina; Van de Walle, Gerlinde R; Van Soom, Ann; Meyer, Evelyne

2013-05-22

98

Awareness of substance abuse in orthopedic patients: a survey of orthopedic surgeons.  

PubMed

We surveyed 178 orthopedic physicians in the Washington, DC, area to ascertain the effect on patient care of previous education in the area of drug and alcohol issues. The return rate was 75%. Of the respondents, 99% were male, average age was 46.7 years (+/- 9.3), and average number of years in practice was 15.2 (+/- 9.6). A majority of respondents indicated that they did not have training in the abuse potential of analgesics (92 [69%]), characteristics of benzodiazepine abuse (77 [58%]), or when to seek the assistance of an addiction medicine specialist for patients with chronic pain (106 [80%]). Only 41 (31%) of the orthopedists indicated that they inquire about alcohol and drug use before prescribing opiates for more than a week. We offer suggestions for self-education for interested physicians. PMID:1749977

Schwartz, R H; Johnson, N P; Hornung, C A; Phelps, G L; Berg, E W

1991-12-01

99

78 FR 17940 - Certain Computerized Orthopedic Surgical Devices, Software, Implants, and Components Thereof...  

Federal Register 2010, 2011, 2012, 2013

...2945] Certain Computerized Orthopedic Surgical Devices, Software, Implants, and Components...entitled Certain Computerized Orthopedic Surgical Devices, Software, Implants, and Components...and Procedure filed on behalf of MAKO Surgical Corp. on March 19, 2013. The...

2013-03-25

100

The impact of functional jaw orthopedics in subjects with unfavorable class II skeletal patterns  

Microsoft Academic Search

ObjectiveTo evaluate the outcomes of functional jaw orthopedics (FJO) followed by fixed appliances in Class II patients showing cephalometric signs predictive of unfavorable responsiveness to orthopedic treatment.

Tiziano Baccetti; James A. McNamara

2010-01-01

101

[Technical orthopedics : Importance in an increasingly operatively oriented faculty].  

PubMed

The foundation of the German Society for Orthopedics in 1901 was due to a separation from the faculty of surgery because a surgical approach alone did not adequately deal with the symptoms. Orthopedists were initially considered as a fringe group. The conservative treatment approach was initially at the forefront and operative measures were a side line. The main aim was the rehabilitation of patients into a normal life as best as possible. In the conservative area treatment with orthopedic technical aids and appliances rapidly came to play an important role and a great multitude of technical appliances were developed with sometimes very different possible applications.Despite the clearly improved operative treatment approaches in orthopedics and trauma surgery, technical orthopedics still plays a substantial role even today. Healing and supportive aids and appliances are of decisive importance for the treatment of a multitude of diseases and handicaps. They stabilize and improve operative treatment results and often result in new approaches. This depends on cooperation between technicians, therapists and physicians in a team, even in the scientific field. Evidence-based studies on the effectiveness of technical aids are currently still uncommon but recently some clear evidence for effectiveness could be shown. Scientifically this is a very varied field of work. The demographic development presents new requirements which must be dealt with. Technical solutions are often very promising especially in this field. Technical orthopedics remains an important component of the specialty of orthopedics and trauma surgery and with an increasing tendency due to more recent research and development. PMID:23955523

Greitemann, B; Maronna, U

2013-10-01

102

Intrathecal catheterization after unintentional dural puncture during orthopedic surgery  

Microsoft Academic Search

Purpose  We investigated whether inserting an intrathecal catheter and leaving it in place for 24 h after an unintentional dural puncture\\u000a in orthopedic patients reduced the incidence of post-dural puncture headache (PDPH).\\u000a \\u000a \\u000a \\u000a Methods  The study consisted of 427 patients in whom a total of 21 unintentional dural punctures had occurred during orthopedic surgery\\u000a performed between 2002 and 2006. Seven patients (phase I; evaluated

Ayda Turkoz; Aysu Kocum; H. Evren Eker; Hacer Ulgen; Mustafa Uysalel; Gulnaz Arslan

2010-01-01

103

Meningococcal purpura fulminans in children: I. Initial orthopedic management  

Microsoft Academic Search

Background  Purpura fulminans is a rare and extremely severe infection, mostly due to Neisseria meningitidis frequently causing early orthopedic lesions. Few studies have reported on the initial surgical management of acute purpura\\u000a fulminans. The aim of this study is to look at the predictive factors in orthopedic outcome in light of the initial surgical\\u000a management in children surviving initial resuscitation.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  Nineteen

E. Nectoux; A. Mezel; S. Raux; D. Fron; M. Maillet; B. Herbaux

2010-01-01

104

[Orthopedic aspects in interdisciplinary multimodal therapy of chronic back pain].  

PubMed

The effect of interdisciplinary multimodal therapy of chronic back pain is well documented. With elapsing time changing diagnostic focuses, therapeutic strategies and objectives have to be considered. The chronicity leads to a modification of the relevance of structure-related diagnosis and therapy and changes the significance of the classic orthopedic instruments. The requirement of a rational causal therapy in chronic back pain still remains but the focal points shift to the consideration of somatic, psychological and social disposing and supporting factors.The aim of this paper is to reflect the necessary orthopedic expertise in the context of the pathomechanics of chronic back pain and the interdisciplinary teamwork. PMID:21523420

Weh, L; Marnitz, U

2011-06-01

105

Spinal manipulative therapy.  

PubMed

Spinal manipulative therapy is growing in popularity and acceptance, as judged by the increasing number of practitioners in physical therapy and medicine and by the results of clinical trials. Manipulation is the skilled, gentle, passive movement of a joint (or spinal segment) either within or beyond its active range of motion. This definition is broad enough to encompass a great variety of techniques, ranging from the more traditional thrust to oscillation and distraction. Manipulation is rendered effective by a combination of mechanical, neurophysiologic, and biomechanical mechanisms. PMID:6225596

Paris, S V

1983-10-01

106

Update: Biochemistry of Genetic Manipulation.  

ERIC Educational Resources Information Center

|Various topics on the biochemistry of genetic manipulation are discussed. These include genetic transformation and DNA; genetic expression; DNA replication, repair, and mutation; technology of genetic manipulation; and applications of genetic manipulation. Other techniques employed are also considered. (JN)|

Barker, G. R.

1983-01-01

107

Stability of orthopedic and surgically assisted rapid palatal expansion over time  

Microsoft Academic Search

At the present time no reports are available on the stability between orthopedic and surgically assisted rapid palatal expansion. This study was designed to examine and compare the dental and skeletal changes over time for both orthopedic maxillary expansion and surgically assisted palatal expansion. The study was divided into two groups. Group one was orthopedically expanded and consisted of 14

Jeffrey L. Berger; Valmy Pangrazio-Kulbersh; Thomas Borgula; Richard Kaczynski

1998-01-01

108

Semiconductor physics: Magnetic manipulations  

Microsoft Academic Search

A deft technique allows magnetic atoms to be placed one by one in a semiconductor crystal. It's a further step towards an ambitious goal: a computer chip that might simultaneously store and manipulate data.

Nitin Samarth

2006-01-01

109

Polynomial Manipulation with APL.  

National Technical Information Service (NTIS)

A simple but effective system for the manipulation of polynomials of several variables in APL is presented. The system is especially advantageous in situations where more sophisticated symbolic computing systems are not available, or have failed to solve ...

B. Billard

1978-01-01

110

Classifying human manipulation behavior  

Microsoft Academic Search

This paper presents a taxonomy for detailed classification of human and anthropomorphic manipulation behavior. This hand-centric, motion-centric taxonomy differentiates tasks based on criteria such as object contact, prehension, and the nature of object motion relative to a hand frame. A sub-classification of the most dexterous categories, within-hand manipulation, is also presented, based on the principal axis of object rotation or

Ian M. Bullock; Aaron M. Dollar

2011-01-01

111

Office orthopedics: thumb spica casting for scaphoid fractures.  

PubMed

Fracture of the scaphoid bone of the wrist is a common orthopedic problem and is accurately diagnosed by determining the mechanism of injury based on the history, performing a specific physical examination maneuvers and interpreting radiographic findings. Skill in the application of the thumb spica cast enables the family physician to provide appropriate and definitive care for many of these patients. PMID:7668203

Richard, J R

1995-09-15

112

Why patients choose regional anesthesia for orthopedic and trauma surgery  

Microsoft Academic Search

Background. While both surgeons' and anesthesiologists' preference of regional over general anesthesia is increasing, the patients' preference remains limited. Little is known about why patients choose regional anesthesia. The aim of our study was to answer this question with regard to orthopedic and trauma surgery. Methods. The study was carried out prospectively from 1999 to 2001 and included 238 patients

Linda E. Pelinka; Hartmut Pelinka; Martin Leixnering; Walter Mauritz

2003-01-01

113

Information on Polymeric Materials Used in Orthopedic Devices.  

National Technical Information Service (NTIS)

This report provides information on the two polymeric materials most commonly used in the fabrication of orthopedic implants. The work was done as part of Task 80-01 NBS-FDA/BMD Interagency Agreement. The two materials described are ultra high molecular w...

J. M. Crissman G. B. McKenna

1984-01-01

114

Regulation of human osteoblast integrin expression by orthopedic implant materials  

Microsoft Academic Search

Integrins are transmembrane proteins that mediate attachment to extracellular matrix (ECM) proteins. Integrins act as ECM receptors and are believed to play a role in signal transduction and gene regulation, potentially influencing several cellular functions, including differentiation, growth, and migration. Several integrins have previously been found in bone cells in vivo and in vitro. Because the biologic fixation of orthopedic

R. K. Sinha; R. S. Tuan

1996-01-01

115

Strategies for minimizing blood loss in orthopedic surgery  

Microsoft Academic Search

Several major orthopedic surgical procedures including hip arthroplasty, femoral osteotomy, and spinal fusion may result in significant blood loss and the need for allogeneic blood transfusions. Due to the heightened awareness of the potential deleterious effects of allogeneic blood product administration, several techniques have been evaluated to determine their efficacy in limiting perioperative blood loss. The following article will discuss

Joseph D Tobias

2004-01-01

116

Technical Approaches toComputer-Assisted Orthopedic Surgery  

Microsoft Academic Search

Surgical navigation systems and medical robotic devices are increasingly being used during trauma and orthopedic surgery. This article tries to present the underlying technology of these devices and to describe different approaches to the various aspects of the methods. To structure the variety of available products and presented research modules, a new categorization for these approaches is proposed. Examples of

Frank Langlotz; Lutz-Peter Nolte

2004-01-01

117

Bioabsorbable Implants: Review of Clinical Experience in Orthopedic Surgery  

Microsoft Academic Search

Bioabsorbable implants are widely used in orthopedic surgery today and the worldwide market is expanding rapidly. Despite the popularity of these implants, reports of complications continue to appear in the literature. Although the complications rarely have an adverse affect on long-term outcomes, the reports are too numerous to be mere isolated incidents related to one specific implant. Complications have been

Catherine G. Ambrose; Thomas Oscar Clanton

2004-01-01

118

Ten strategies to reduce blood loss in orthopedic surgery  

Microsoft Academic Search

In any operative procedure, careful surgical dissection with precise hemostasis is one of the most effective ways to minimize surgical blood loss and reduce the need for allogeneic red blood cell transfusion. Several other techniques contribute to reduce blood loss in major orthopedic procedures. These techniques are reviewed and include rehearsal of the procedure and positioning the patient to reduce

Carl L. Nelson; H. Jerrel Fontenot

1995-01-01

119

Experimental and clinical performance of porous tantalum in orthopedic surgery  

Microsoft Academic Search

Porous tantalum, a new low modulus metal with a characteristic appearance similar to cancellous bone, is currently available for use in several orthopedic applications (hip and knee arthroplasty, spine surgery, and bone graft substitute). The open-cell structure of repeating dodecahedrons is produced via carbon vapor deposition\\/infiltration of commercially pure tantalum onto a vitreous carbon scaffolding. This transition metal maintains several

Brett Russell Levine; Scott Sporer; Robert A. Poggie; Craig J. Della Valle; Joshua J. Jacobs

2006-01-01

120

Orthopedic pitfalls in the ED: Slipped capital femoral epiphysis  

Microsoft Academic Search

Slipped capital femoral epiphysis (SCFE), though a relatively common disorder, is frequently missed on initial presentation. Symptoms can be vague, the physical examination unrevealing, and radiographic abnormalities subtle. Prompt diagnosis of SCFE is important, however, to improve clinical outcome. The emergency physician needs to remain vigilant for this diagnosis to avoid this orthopedic pitfall. This article examines the clinical presentation,

Andrew D. Perron; Mark D. Miller; William J. Brady

2002-01-01

121

The role of biomechanics in orthopedic and neurological rehabilitation  

Microsoft Academic Search

Movement is fundamental to human well-being, function and participation in work and leisure activities. As a result, regaining optimal movement abilities and independence frequently become central foci of rehabilitation programs developed for individuals recovering from serious orthopedic and neurologic injuries. Further, preventing additional injury to the locomotor system becomes essential for effective long-term management of chronic medical conditions such as

KORNELIA KULIG; JUDITH M. BURNFIELD

2008-01-01

122

Production of new titanium alloy for orthopedic implants  

Microsoft Academic Search

The beta titanium alloys is one of the most promising groups of the titanium alloys. This fact is due to the good formability, mechanical properties and potential applications; moreover, these alloys present the highest level of mechanical, fatigue and corrosion resistance. The beta titanium alloys present the lowest elastic modulus, an interesting property for orthopedic implants. A ? alloy recently

E. B. Taddei; V. A. R. Henriques; C. R. M. Silva; C. A. A. Cairo

2004-01-01

123

Manipulators and Manipulation: Public Opinion in a Representative Democracy  

Microsoft Academic Search

Politicians and special interests have attempted to capture and manipulate citizens for as long as recorded history. The question is not whether elites attempt to manipulate citizens but whether and to what degree they succeed. Is public opinion relatively autonomous from the willful strategies of politicians and private interests to manipulate it in specific directions? Or, are citizens willfully manipulated

Lawrence R. Jacobs

2001-01-01

124

Mainstreaming Preschoolers: Children with Orthopedic Handicaps. A Guide for Teachers, Parents, and Others Who Work with Orthopedically Handicapped Preschoolers.  

ERIC Educational Resources Information Center

This guide to mainstreaming preschoolers with orthopedic handicaps is one of a series of eight manuals on mainstreaming preschoolers developed by Project Head Start. The guide is addressed to parents, teachers, and other professionals and paraprofessionals. Chapter I presents information on the meaning, benefits and implementation of…

Kieran, Shari Stokes; And Others

125

Manipulator comparative testing program  

SciTech Connect

The Manipulator Comparative Testing Program compared performance of selected manipulator systems under typical remote handling conditions. The site of testing was the Remote Operations and Maintenance Demonstration Facility operated by the Consolidated Fuel Reprocessing Program of the Oak Ridge National Laboratory. Three experiment examined differences among manipulator systems from the US and Japan. The manipulator systems included the Meidensha BILARM 83A, Central Research Laboratories' (CRL's) Model M-2, and GCA PaR systems Model 6000. Six manipulator and control mode combinations were evaluated: (a) the BILARM in master-slave mode without force reflection; (b) the BILARM in master-slave mode with force reflection; (c) the Model M-2 in master-slave mode without force reflection; (d) the Model M-2 in master-slave mode with force reflection; (e) the BILARM with switchbox controls; and (f) the PaR 6000 with switchbox controls. The experiments also examined differences between master-slave systems with and without force reflections, and differences between master-slave systems and switchbox-controlled systems.

Draper, J.V.; Handel, S.J.; Sundstrom, E.; Herndon, J.N.; Fujita, Y.; Maida, M.

1986-01-01

126

Stainless steel decontamination manipulators  

SciTech Connect

Three, large-volume coverage manipulator systems were designed and built for the Defense Water Processing Facility at the Savannah River Laboratory. These stainless steel systems will be used for high-pressure spray decontamination of waste containers and large process equipment modules. Each system has a manipulator arm, folding boom, and vertical drive and guide structure. Handling capacity is 45 kg, horizontal reach is 4.6 m with a 180-deg swing motion, and the vertical travel is 6 m. The system is remotely removable and replaceable in modules using an overhead crane and an impact wrench. The manipulator arm has seven motions: Shoulder rotation and pivot, elbow pivot, wrist pivot and rotation, and grip open-close. All motions are variable speed and are slip-clutch protected to prevent overloading from external forces (collisions).

Sullivan, R.J.

1986-01-01

127

ELECTRONIC MASTER SLAVE MANIPULATOR  

DOEpatents

A remote control manipulator is described in which the master and slave arms are electrically connected to produce the desired motions. A response signal is provided in the master unit in order that the operator may sense a feel of the object and may not thereby exert such pressures that would ordinarily damage delicate objects. This apparatus will permit the manipulation of objects at a great distance, that may be viewed over a closed TV circuit, thereby permitting a remote operator to carry out operations in an extremely dangerous area with complete safety.

Goertz, R.C.; Thompson, Wm.M.; Olsen, R.A.

1958-08-01

128

Computer Algebra versus Manipulation  

ERIC Educational Resources Information Center

|In the UK there is increasing concern about the lack of skill in algebraic manipulation that is evident in students entering mathematics courses at university level. In this note we discuss how the computer can be used to ameliorate some of the problems. We take as an example the calculations needed in three dimensional vector analysis in polar…

Zand, Hossein; Crowe, David

2004-01-01

129

Risk of surgical site infection in patients undergoing orthopedic surgery.  

PubMed

This study aimed to identify risk factors associated with surgical site infections in orthopedic surgical patients at a public hospital in Minas Gerais, Brazil, between 2005 and 2007. A historical cohort of 3,543 patients submitted to orthopedic surgical procedures. A descriptive analysis was conducted and surgical site infection incidence rates were estimated. To verify the association between infection and risk factors, the Chi-square Test was used. The strength of association of the event with the independent variables was estimated using Relative Risk, with a 95% confidence interval and p<0.05. The incidence of surgical site infection was 1.8%. Potential surgical wound contamination, clinical conditions, time and type of surgical procedure were statistically associated with infection. Identifying the association between surgical site infection and these risk factors is important and contributes to nurses' clinical practice. PMID:22249670

Ercole, Flávia Falci; Franco, Lúcia Maciel Castro; Macieira, Tamara Gonçalves Rezende; Wenceslau, Luísa Cristina Crespo; de Resende, Helena Isabel Nascimento; Chianca, Tânia Couto Machado

130

Radiation exposure from fluoroscopy during orthopedic surgical procedures  

SciTech Connect

The use of fluoroscopy has enabled orthopedic surgeons to become technically more proficient. In addition, these surgical procedures tend to have less associated patient morbidity by decreasing operative time and minimizing the area of the operative field. The trade-off, however, may be an increased risk of radiation exposure to the surgeon on an annual or lifetime basis. The current study was designed to determine the amount of radiation received by the primary surgeon and the first assistant during selected surgical procedures involving the use of fluoroscopy. Five body sites exposed to radiation were monitored for dosage. The results of this study indicate that with appropriate usage, (1) radiation exposure from fluoroscopy is relatively low; (2) the surgeon's dominant hand receives the most exposure per case; and (3) proper maintenance and calibration of fluoroscopic machines are important factors in reducing exposure risks. Therefore, with proper precautions, the use of fluoroscopy in orthopedic procedures can remain a safe practice.

Riley, S.A. (St. Luke's Hospital, Cleveland, OH (USA))

1989-11-01

131

Door breaching robotic manipulator  

NASA Astrophysics Data System (ADS)

As unmanned systems become more commonplace in military, police, and other security forces, they are tasked to perform missions that the original hardware was not designed for. Current military robots are built for rough outdoor conditions and have strong inflexible manipulators designed to handle a wide range of operations. However, these manipulators are not well suited for some essential indoor tasks, including opening doors. This is a complicated kinematic task that places prohibitively difficult control challenges on the robot and the operator. Honeybee and iRobot have designed a modular door-breaching manipulator that mechanically simplifies the demands upon operator and robot. The manipulator connects to the existing robotic arm of the iRobot PackBot EOD. The gripper is optimized for grasping a variety of door knobs, levers, and car-door handles. It works in conjunction with a compliant wrist and magnetic lock-out mechanism that allows the wrist to remain rigid until the gripper has a firm grasp of the handle and then bend with its rotation and the swing of the door. Once the door is unlatched, the operator simply drives the robot through the doorway while the wrist compensates for the complex, multiple degree-of-freedom motion of the door. Once in the doorway the operator releases the handle, the wrist pops back into place, and the robot is ready for the next door. The new manipulator dramatically improves a robot's ability to non-destructively breach doors and perform an inspection of a room's content, a capability that was previously out of reach of unmanned systems.

Schoenfeld, Erik; Parrington, Lawrence; von Muehlen, Stephan

2008-05-01

132

Meningococcal purpura fulminans in children: I. Initial orthopedic management  

PubMed Central

Background Purpura fulminans is a rare and extremely severe infection, mostly due to Neisseria meningitidis frequently causing early orthopedic lesions. Few studies have reported on the initial surgical management of acute purpura fulminans. The aim of this study is to look at the predictive factors in orthopedic outcome in light of the initial surgical management in children surviving initial resuscitation. Methods Nineteen patients referred to our institution between 1987 and 2005 were taken care of at the very beginning of the purpura fulminans. All cases were retrospectively reviewed so as to collect information on the total skin necrosis, vascular insufficiency, gangrene, and total duration of vasopressive treatment. Results All patients had multiorgan failure; only one never developed any skin necrosis or ischemia. Eighteen patients lost tissue, leading to 22 skin grafts, including two total skin grafts. There was only one graft failure. Thirteen patients were concerned by an amputation, representing, in total, 54 fingers, 36 toes, two transmetatarsal, and ten transtibial below-knee amputations, with a mean delay of 4 weeks after onset of the disease. Necrosis seems to affect mainly the lower limbs, but there is no predictive factor that impacted on the orthopedic outcome. We did not perform any fasciotomy or compartment pressure measurement to avoid non-perfusion worsening; nonetheless, our outcome in this series is comparable to existing series in the literature. V.A.C.® therapy could be promising regarding the management of skin necrosis in this particular context. While suffering from general multiorgan failure, great care should be observed not to miss any additional osseous or articular infection, as some patients also develop local osteitis and osteomyelitis that are often not diagnosed. Conclusions We do not advocate very early surgery during the acute phase of purpura fulminans, as it does not change the orthopedic outcome in these children. By performing amputations and skin coverage some time after the acute phase, we obtained similar results to those found in the literature.

Mezel, A.; Raux, S.; Fron, D.; Maillet, M.; Herbaux, B.

2010-01-01

133

Knowledge of levels of evidence criteria in orthopedic residents.  

PubMed

The purpose of the levels of evidence system is to provide a framework for critical evaluation of orthopedic literature. This rating system is based on guidelines from the Oxford Centre for Evidence-Based Medicine and is currently in use in several orthopedic surgery journals. The purpose of this study was to investigate resident knowledge of the levels of evidence criteria used in classification of clinical articles. Thirty-eight residents from 5 orthopedic surgery training programs, from year-in-training 3 to 5, determined the levels of evidence rating of 10 blinded articles representing all levels of evidence types in the orthopedic literature. Residents were then provided with a levels of evidence information sheet and asked to re-rate each article. The mean percentage correct for the initial rating was 29.5% and for the post-education rating was 41.3%, with significant improvement after levels of evidence education (P<.001). The year-in-training-3 group had the highest mean percentage correct for the average of both tests (46.7%) compared to year-in-training-4 (34.2%) and year-in-training-5 (25.4%). Residents were significantly more accurate scoring therapeutic (41.1% correct pre-levels of evidence; 51.6% post-levels of evidence) than prognostic studies (6.6% correct pre-levels of evidence; 28.9% post-levels of evidence) (P<.001). Residents graded the level of evidence correctly in fewer than half the papers. These findings indicate that resident knowledge of levels of evidence criteria is limited and suggest a need for more education in this area. PMID:19634849

Wolf, Jennifer Moriatis; Athwal, George S; Hoang, Bang H; Mehta, Samir; Williams, Allison E; Owens, Brett D

2009-07-01

134

Orthopedic communication about osteoarthritis treatment: Does patient race matter?  

PubMed Central

Objectives To understand racial disparities in the use of total joint replacement, we examined whether there were racial differences in patient-provider communication about treatment of chronic knee/hip osteoarthritis in a sample of African American and white patients referred to Veterans Affairs (VA) orthopedic clinics. Methods Audio-recorded visits between patients and orthopedic surgeons were coded using the Roter Interaction Analysis System and the Informed Decision Making Model. Racial differences in communication outcomes were assessed using linear regression models adjusted for study design, patient characteristics, and clustering by provider. Results The sample (N=402) included 296 white and 106 African American patients. Most patients were male (95%) and 50-64 years old (68%). Almost half (41%) reported an income <$20,000. African American patients were younger and reported lower incomes than white patients. Visits with African American patients contained less discussion of biomedical topics (Beta=-9.14, 95% CI=-16.73,-1.54) and more rapport-building statements (Beta=7.84, 95% CI=1.85,13.82) than visits with white patients. However, no racial differences were observed with regard to length of visit, overall amount of dialogue, discussion of psychosocial issues, patient activation/engagement statements, physician verbal dominance, display of positive affect by patients or providers, or discussion related to informed decision making. Conclusions In this sample, communication between orthopedic surgeons and patients regarding the management of chronic knee/hip osteoarthritis did not, for the most part, vary by patient race. These findings diminish the potential role of communication in VA orthopedic settings as an explanation for well-documented racial disparities in the use of total joint replacement.

Hausmann, Leslie R.M.; Hanusa, Barbara H.; Kresevic, Denise M.; Zickmund, Susan; Ling, Bruce S.; Gordon, Howard S.; Kwoh, C. Kent; Mor, Maria K.; Hannon, Michael J.; Cohen, Peter Z.; Grant, Richard; Ibrahim, Said A.

2011-01-01

135

Mending injured athletes: a track record of orthopedic advances.  

PubMed

Physicians have long been closely allied with competitive sports. In 157 AD, Galen served as a physician to Greek gladiators.(1) Severe musculoskeletal trauma certainly shortened the careers of ancient pugilists who survived their matches. However, modern gladiators-from pick-up basketball players to football professionals-often get to "play another day" because of advances in orthopedic surgery, particularly those of the last 30 years. PMID:20086486

Schnirring, Lisa

2003-09-01

136

Bromfenac, acetaminophen, and placebo in orthopedic postoperative pain  

Microsoft Academic Search

In a double-blind, placebo-controlled, single-dose, parallel-group study, oral doses (5, 10 and 25 mg) of the prostaglandin synthetase inhibitor bromfenac were compared with acetaminophen (1000 mg) and placebo for postoperative orthopedic pain. Analgesic measurements were made by nurse observers by use of standard verbal rating and visual analog scales. For most pain intensity and pain relief measurements, 1000 mg acetaminophen

Henry J McQuay; Dawn Carroll; Terry Frankland; Mark Harvey; Andrew Moore; H J McQuay DM

1990-01-01

137

Tissue Engineering Strategies for the Regeneration of Orthopedic Interfaces  

Microsoft Academic Search

A major focus in the field of orthopedic tissue engineering is the development of tissue engineered bone and soft tissue grafts\\u000a with biomimetic functionality to allow for their translation to the clinical setting. One of the most significant challenges\\u000a of this endeavor is promoting the biological fixation of these grafts with each other as well as the implant site. Such

Helen H. Lu; Siddarth D. Subramony; Margaret K. Boushell; Xinzhi Zhang

2010-01-01

138

Postoperative constipation risk assessment in Turkish orthopedic patients.  

PubMed

This descriptive, correlational study was conducted to describe constipation risk assessment and the affecting factors of constipation risk of patients who have undergone major orthopedic surgery. Data were collected using a patient information form and the Constipation Risk Assessment Scale (CRAS) on the second postoperative day. Data were analyzed using the SPSS version 11.5 for Windows. The mean age of the 83 patients studied was 53.75 ± 21.29 years. Subjects were hospitalized in the orthopedic wards for 14.39 ± 15.17 days, and their current bowel habit was 2.18 ± 1.80 stools per week. Of the sample, 63.9% were female, 69.9% of the patients had a history of previous surgery, 45.8% had hip/knee arthroplasty surgery, and 55.4% had bowel problems during the hospitalization period. Patients had a medium risk for constipation according to the CRAS subscale (gender, mobility, and pharmacological agents). Total CRAS score was 12.73 ± 4.75 (medium risk) on the second postoperative day. In addition, age, marital status, educational level, having a history of surgery, and bowel elimination problems did have a significant effect on constipation risk. On the basis of the findings from this study, nurses must learn the postoperative constipation risk of orthopedic patients to implement safe and effective interventions. PMID:22472670

?endir, Merdiye; Büyük?ylmaz, Funda; A?t?, Türkinaz; Gürp?nar, ?engül; Yazgan, ?lknur

139

Overview of ultrasound usage trends in orthopedic and sports physiotherapy  

PubMed Central

Background The purpose of this study is to examine current beliefs about the use, the clinical importance, the theoretical fundamentals and the utilization criteria of therapeutic ultrasound (TUS) among physical therapists on the clinical practice in orthopedic and sports physiotherapy in Brazil. Methods A brief survey was developed based on previous studies and was sent to 55 physical therapists with advanced competency in orthopedics and sports physiotherapy. The questions addressed general topics about the professional profile and ultrasound usage and dosage. Results Our data show the wide availability and frequent use of TUS in this sample of physical therapists. TUS is used in distinct musculoskeletal injuries and/or disorders in both acute and chronic conditions. Muscles, tendons and ligaments represented the major structures where TUS is used. Questions on the basic theory of TUS demonstrated a lack of knowledge of the ultrasound physiological effects as well as its interaction with biological tissues and TUS absolute contraindication. Conclusion A Brazilian profile about the US usage and dosage in orthopedic and sports physiotherapy is presented and highlights the need for a continuous upgrading process and further research into its effects.

2012-01-01

140

Basis for spinal manipulative therapy: A physical therapist perspective  

PubMed Central

Physical therapists internationally provide spinal manipulative therapy (SMT) to patients with musculoskeletal pain complaints. SMT has been a part of physical therapist practice since the profession’s beginning. Early physical therapist clinical decision making for SMT was influenced by the approaches of osteopathic and orthopedic physicians at the time. Currently a segmental clinical decision making approach and a responder clinical decision making approach are two of the more common models through which physical therapist clinical use of SMT is directed. The focus of segmental clinical decision making is upon identifying a dysfunctional vertebral segment with the application of SMT to restore mobility and/or alleviate pain. The responder clinical decision making approach attempts to categorize individuals based on a pattern of signs and symptoms suggesting a likely positive response to SMT. The present manuscript provides an overview of common physical therapist clinical decision making approaches to SMT and presents areas requiring further study in order to optimize patient response.

Bialosky, Joel E.; Simon, Corey B.; Bishop, Mark D.; George, Steven Z.

2012-01-01

141

REMOTELY OPERATED MANIPULATOR  

DOEpatents

A manipulator is described for performing, within an entirely enclosed cell containling radioactive materials, various mechanical operations. A rod with flexible fingers is encompassed by a tubular sleeve shorter than the rod. Relative movement between the rod and sleeve causes the fingers to open and close. This relative movement is effected by relative movement of permanent magnets in magnetic coupling relation to magnetic followers affixed to the ends of the rod and sleeve. The rod and its sleeve may be moved as a unit axially or may be rotated by means of the magnetic couplings. The manipulator is enclosed within a tubular member which is flexibly sealed to an opening in the cell. (AEC)

Hutto, E.L.

1961-08-15

142

Manipulation of Pose Distributions  

Microsoft Academic Search

For assembly tasks parts often have to be oriented before\\u000a\\u0009\\u0009 they can be put in an assembly. The results presented in\\u000a\\u0009\\u0009 this paper are a component of the automated design of parts\\u000a\\u0009\\u0009 orienting devices. The focus is on orienting parts with\\u000a\\u0009\\u0009 minimal sensing and manipulation. We present a new approach\\u000a\\u0009\\u0009 to parts orienting through the manipulation of pose\\u000a\\u0009\\u0009 distributions. Through

Mark Moll; Michael A. Erdmann

2002-01-01

143

The Effect of Transdermal Nitroglycerin on Spinal S(+)Ketamine Antinociception Following Orthopedic Surgery  

Microsoft Academic Search

Study Objectives: To determine whether combination of transdermal nitroglycerine (a nitric oxide generator) would enhance analgesia from epidural S(+)-ketamine (a N-methyl-d-aspartate antagonist) in patients undergoing orthopedic surgery with combined spinal anesthesia.Design: Randomized, double-blind study.Setting: Orthopedic surgery unit of a teaching hospital.Patients: 60 ASA physical status I and II patients scheduled for minor orthopedic knee surgery.Interventions: Patients were randomized to one

Gabriela R Lauretti; Ana-Paula M Oliveira; Alexandre M Rodrigues; Cleber A. J Paccola

2001-01-01

144

Stroke following Chiropractic Manipulation  

Microsoft Academic Search

We present 3 cases of stroke due to arterial dissection following chiropractic manipulation: (1) a 31-year-old woman with left vertebral dissection developed a large cerebellar infarct, (2) a 64-year-old man developed a left parietal infarct due to left carotid dissection and (3) a 51-year-old man developed right Horner’s syndrome, fluctuating dysarthria, left facial droop, and left arm weakness due to

Joseph S. Jeret; Mark Bluth

2002-01-01

145

Aggregate Interview Method of ranking orthopedic applicants predicts future performance.  

PubMed

This article evaluates and describes a process of ranking orthopedic applicants using what the authors term the Aggregate Interview Method. The authors hypothesized that higher-ranking applicants using this method at their institution would perform better than those ranked lower using multiple measures of resident performance. A retrospective review of 115 orthopedic residents was performed at the authors' institution. Residents were grouped into 3 categories by matching rank numbers: 1-5, 6-14, and 15 or higher. Each rank group was compared with resident performance as measured by faculty evaluations, the Orthopaedic In-Training Examination (OITE), and American Board of Orthopaedic Surgery (ABOS) test results. Residents ranked 1-5 scored significantly better on patient care, behavior, and overall competence by faculty evaluation (P<.05). Residents ranked 1-5 scored higher on the OITE compared with those ranked 6-14 during postgraduate years 2 and 3 (P?.5). Graduates who had been ranked 1-5 had a 100% pass rate on the ABOS part 1 examination on the first attempt. The most favorably ranked residents performed at or above the level of other residents in the program; they did not score inferiorly on any measure. These results support the authors' method of ranking residents. The rigorous Aggregate Interview Method for ranking applicants consistently identified orthopedic resident candidates who scored highly on the Accreditation Council for Graduate Medical Education resident core competencies as measured by faculty evaluations, performed above the national average on the OITE, and passed the ABOS part 1 examination at rates exceeding the national average. PMID:23823057

Geissler, Jacqueline; VanHeest, Ann; Tatman, Penny; Gioe, Terence

2013-07-01

146

Laser Manipulation of Beams  

NASA Astrophysics Data System (ADS)

State-of-the-art short pulse high peak power solid state lasers, interacting with relativistic charged particle beams, provide many opportunities in probing new scientific phenomena and in creating new probes for further investigations. Probing mutual phase-space characteristics of particle and photon beams, generating hard gamma rays by Compton back scattering for photon-photon collisions and nuclear spectroscopy, guiding short pulse lasers for particle acceleration and synchronization of particle and photon beams to nanometers and femtoseconds scales --- all provide significant opportunities. We will outline the various laser manipulation of beams and techniques for applications in particle and nuclear physics and synchrotron radiation sources.

Chattopadhyay, Swapan

1997-05-01

147

Single Molecule Manipulation  

NASA Astrophysics Data System (ADS)

Single-molecule manipulation studies open a door for a close-up investigation of complex biological interactions at the molecular level. In these studies, single biomolecules are pulled while their force response is being monitored. The process is often nonequilibrium, and interpretation of the results has been challenging. We used the atomic force microscope to pull proteins and DNA, and determined the equilibrium properties of the molecules using the recently derived nonequilibrium work theorem. I will present applications of the technique in areas ranging from fundamental biological problems such as DNA mechanics, to complex medical processes such as the mechanical activation of von Willebrand Factor, a key protein in blood coagulation.

Kiang, Ching-Hwa

2011-10-01

148

Orthopedic deformities in Emery-Dreifuss muscular dystrophy.  

PubMed

Orthopedic deformities in Emery-Dreifuss muscular dystrophy are discussed based on a study of four patients and an extensive literature review. The condition is characterized by slowly progressive humeroperoneal muscle weakness; ankle equinus, elbow flexion, and neck extensor muscle contractures; paravertebral muscle tightness; and cardiac abnormalities involving bradycardia and atrioventricular conduction defects. Tendo Achilles lengthening is warranted, since patients remain ambulatory for several decades. Scoliosis occurred in three patients but stabilized in the absence of treatment. Recognition of the condition is important to allow for heart pacemaker insertion because the usually asymptomatic cardiac abnormalities are associated with a high incidence of sudden death in mid-adult life. PMID:2056082

Shapiro, F; Specht, L

149

Effect of social media in health care and orthopedic surgery.  

PubMed

With the growth of social media platforms, their potential to affect health care, and orthopedics specifically, continues to expand. We reviewed the literature to obtain all pertinent information on social media in health care and examined its strengths and weaknesses from patient and physician perspectives. Health care professionals have slowly begun to use social media to stay connected with patients. The recent use of networking sites aims to improve education, provide a forum to discuss relevant medical topics, and allow for improved patient care. The use of social media, with the understanding of its limitations, may help promote patient happiness and safety and serve as an educational platform. PMID:22495836

Saleh, Jenine; Robinson, Brooke S; Kugler, Nathan W; Illingworth, Kenneth D; Patel, Pranay; Saleh, Khaled J

2012-04-01

150

Meningococcal purpura fulminans in children. II: Late orthopedic sequelae management  

Microsoft Academic Search

Background  Purpura fulminans is a rare and extremely severe infection, mostly due to Neisseria meningitidis. Nineteen patients were followed up immediately after the initial multivisceral failure in order to diagnose late-onset orthopedic\\u000a sequelae. We report our experience with these 19 patients, in light of our medical follow-up protocol and surgical management.\\u000a \\u000a \\u000a \\u000a \\u000a Materials and methods  Nineteen patients were referred for acute purpura fulminans

E. Nectoux; A. Mezel; S. Raux; D. Fron; C. Klein; B. Herbaux

2010-01-01

151

Parasites and supernormal manipulation.  

PubMed

Social parasites may exploit their hosts by mimicking other organisms that the hosts normally benefit from investing in or responding to in some other way. Some parasites exaggerate key characters of the organisms they mimic, possibly in order to increase the response from the hosts. The huge gape and extreme begging intensity of the parasitic common cuckoo chick (Cuculus canorus) may be an example. In this paper, the evolutionary stability of manipulating hosts through exaggerated signals is analysed using game theory. Our model indicates that a parasite's signal intensity must be below a certain threshold in order to ensure acceptance and that this threshold depends directly on the rate of parasitism. The only evolutionarily stable strategy (ESS) combination is when hosts accept all signallers and parasites signal at their optimal signal intensity, which must be below the threshold. Supernormal manipulation by parasites is only evolutionarily stable under sufficiently low rates of parasitism. If the conditions for the ESS combination are not satisfied, rejector hosts can invade using signal intensity as a cue for identifying parasites. These qualitative predictions are discussed with respect to empirical evidence from parasitic mimicry systems that have been suggested to involve supernormal signalling, including evicting avian brood parasites and insect-mimicking Ophrys orchids. PMID:11749709

Holen, Ø H; Saetre, G P; Slagsvold, T; Stenseth, N C

2001-12-22

152

Hydraulic manipulator research at ORNL  

SciTech Connect

Recently, task requirements have dictated that manipulator payload capacity increase to accommodate greater payloads, greater manipulator length, and larger environmental interaction forces. General tasks such as waste storage tank cleanup and facility dismantlement and decommissioning require manipulator life capacities in the range of hundreds of pounds rather than tens of pounds. To meet the increased payload capacities demanded by present-day tasks, manipulator designers have turned once again to hydraulics as a means of actuation. In order to successfully design, build, and deploy a new hydraulic manipulator (or subsystem), sophisticated modeling, analysis, and control experiments are usually needed. Oak Ridge National Laboratory (ORNL) has a history of projects that incorporate hydraulics technology, including mobile robots, teleoperated manipulators, and full-scale construction equipment. In addition, to support the development and deployment of new hydraulic manipulators, ORNL has outfitted a significant experimental laboratory and has developed the software capability for research into hydraulic manipulators, hydraulic actuators, hydraulic systems, modeling of hydraulic systems, and hydraulic controls. The purpose of this article is to describe the past hydraulic manipulator developments and current hydraulic manipulator research capabilities at ORNL. Included are example experimental results from ORNL`s flexible/prismatic test stand.

Kress, R.L.; Jansen, J.F. [Oak Ridge National Lab., TN (United States); Love, L.J. [Oak Ridge Inst. for Science and Education, TN (United States)

1997-03-01

153

Complementary and alternative medicine interventions for the orthopedic patient: a review of the literature  

Microsoft Academic Search

New branches of established disciplines are continually being developed to help patients with chronic orthopedic ailments. What is thought to be conventional treatment varies between countries and changes over time. Therefore the boundary between complementary and conventional medicine remains blurred and constantly shifting. This article reviews the most frequently used CAM interventions for the orthopedic population and will include the

Mary Lou Galantino; Christina Boothroyd; Sandra Lucci

2003-01-01

154

[The motivation of patients to visit private stomatology institutions for the orthopedic stomatological care].  

PubMed

The article deals with the results of sociological survey of patients concerning the motivation of their appealability to private stomatology institutions for the orthopedic stomatological care. The survey data includes the information needed for planning functioning and management of orthopedic stomatological service. PMID:21400736

Kustov, I N

155

Age, Physical Activity, Physical Fitness, Body Composition, and Incidence of Orthopedic Problems.  

ERIC Educational Resources Information Center

|Effects of age, physical activity, physical fitness, and body mass index (BMI) on the occurrence of orthopedic problems were examined. For men, physical fitness, BMI, and physical activity were associated with orthopedic problems; for women, physical activity was the main predictor. Age was not a factor for either gender. (JD)|

Research Quarterly for Exercise and Sport, 1989

1989-01-01

156

Military Curricula for Vocational & Technical Education. Orthopedic Specialist, Classroom Course 10-13.  

ERIC Educational Resources Information Center

|These military-developed curriculum materials for a course for orthopedic specialists are targeted for students from grades 11 through the adult level. The course is designed to provide a working knowledge of the application of casts, traction, and splints to orthopedic patients and the removal of these devices; a working knowledge of assisting…

Brooke Army Medical Center, Fort Sam Houston, TX. Health Care Research Div.

157

A virtual reality simulator for orthopedic basic skills: A design and validation study  

Microsoft Academic Search

Orthopedic drilling as a skill demands high levels of dexterity and expertise from the surgeon. It is a basic skill that is required in many orthopedic procedures. Inefficient drilling can be a source of avoidable medical errors that may lead to adverse events. It is hence important to train and evaluate residents in safe environments for this skill. This paper

Mithra Vankipuram; Kanav Kahol; Alex McLaren; Sethuraman Panchanathan

2010-01-01

158

The Orthopedically Disabled Child: Psychological Implications with an Individual Basis. July 1984 Revision.  

ERIC Educational Resources Information Center

This study describes the implications of the Individual Psychology of Alfred Adler and field theory associated with Kurt Lewin in understanding orthopedically disabled children and points out that orthopedically disabled youngsters have a remarkable range of individual differences both in type of disability as well as level of adjustment.…

Sigmon, Scott B.

159

Timing for effective application of anteriorly directed orthopedic force to the maxilla  

Microsoft Academic Search

Class III malocclusion with retrusive maxilla can be orthopedically corrected in the deciduous and mixed dentition, with reverse-pull headgear in combination with rapid palatal expansion. The literature recommends this procedure be carried out before the patient is 8 years old to obtain the optimal orthopedic result. This statement, however, has not been supported by scientific data. The current study examined

Daniel Merwin; Peter Ngan; Urban Hagg; Cynthia Yiu; Stephen H. Y. Wei

1997-01-01

160

Use and usability of custom-made orthopedic shoes.  

PubMed

The goal of this study was to investigate the use of custom-made orthopedic shoes (OS) and the association between the use of OS and the most relevant aspects of their usability. Over a 6-month period, patients meeting the inclusion criteria were recruited by 12 orthopedic shoe companies scattered throughout the Netherlands and asked to complete a questionnaire composed of a pre- and post-OS section. Patients with different pathologies were included in the study (n = 339; response 67%). Mean age of the patients was 63 +/- 15 years, and 38% were male. Three months after delivery, 81% of the patients used their OS frequently (4-7 days/week), 13% occasionally (1-3 days/week), and 6% did not use their OS. Associations were found between use and all measured aspects of usability (p-values varied from <0.001 to 0.028). Patients who used their OS more often had a more positive opinion regarding all the aspects of usability. We conclude that all aspects of the usability of OS are relevant in relation to their use and should be taken into account when prescribing and evaluating OS. PMID:20437329

van Netten, Jaap J; Jannink, Michiel J A; Hijmans, Juha M; Geertzen, Jan H B; Postema, Klaas

2010-01-01

161

An orthopedic tissue adhesive for targeted delivery of intraoperative biologics.  

PubMed

Tissue adhesives can bind together damaged tissues and serve as tools to deliver and localize therapeutics to facilitate regeneration. One emerging therapeutic trend in orthopedics is the use of intraoperative biologics (IOB), such as bone marrow (BM) and platelet-rich plasma (PRP), to stimulate healing. Here, we introduce the application of the biomaterial chondroitin sulfate succinimidyl succinate (CS-NHS) to deliver IOB in a hydrogel adhesive. We demonstrate the biomaterial's ability to bind various tissue types and its cellular biocompatibility with encapsulated human mesenchymal stem cells (hMSCs). Further, we examine in detail the CS-NHS adhesive combined with BM aspirate for use in bone applications. hMSCs were encapsulated in CS-BM and cultured for 5 weeks in osteogenic medium. Quantitative RT-PCR demonstrated osteogenesis via upregulation of the osteogenic transcription factor Runx2 and bone markers alkaline phosphatase and osteocalcin. Significant deposition of calcium and osteocalcin was detected using biochemical, histological, and immunohistochemical techniques. Shear testing demonstrated that the CS-BM adhesive exhibited an adhesive strength approximately an order of magnitude stronger than fibrin glue and approaching that of a cyanoacrylate adhesive. These results indicate that CS-NHS is a promising delivery tool for IOB in orthopedic applications requiring a strong, degradable, and biocompatible adhesive that supports bone growth. PMID:23097279

Simson, Jacob; Crist, Joshua; Strehin, Iossif; Lu, Qiaozhi; Elisseeff, Jennifer H

2012-10-23

162

Citrate-based Biodegradable Injectable hydrogel Composites for Orthopedic Applications  

PubMed Central

Previous studies have confirmed that natural bone apatite crystals are bound with citrate-rich molecules. Citrates on apatite crystals impact bone development and its load-bearing function. However, such understanding has never been translated into bone biomaterials design. Herein, a first citrate-based injectable composite material for orthopedic applications is developed based on our recently developed biodegradable poly(ethylene glycol) maleate citrate (PEGMC) and hydroxyapatite (HA). PEGMC contains rich carboxylic groups that could chelate with calcium-containing HA thus facilitating polymer/HA interactions, similar to natural citrate-bound apatite crystal. The crosslinking of poly(ethylene glycol) diacrylate (PEGDA) with PEGMC/HA composites allows an addition control over degradation and mechanical properties of the crosslinked PEGMC/HA (CPEGMC/HA) composites. CPEGMC/HA composite can serve as an ideal injectable cell carrier as confirmed by the enhanced DNA content, ALP activity, and calcium production through a human fetal osteoblast encapsulation study. Ex vivo study on porcine femoral head demonstrated that PEGMC/HA is a potentially promising injectable biodegradable bone material for the treatment of osteonecrosis of the femoral head. Development of biodegradable citrate-based injectable PEGMC/HA composite is an initial step for the development of the next generation of bone tissue engineering and orthopedic biomaterials.

Gyawali, Dipendra; Nair, Parvathi; Kim, Harry K.W.; Yang, Jian

2013-01-01

163

Adherence to perioperative antibiotic prophylaxis among orthopedic trauma patients  

PubMed Central

Background The goal of this study was to assess whether patients receive their antibiotic prophylaxis as prescribed. We also investigated what doses and durations of antibiotics are typically ordered, which patients actually receive antibiotics and factors causing the ordered antibiotic regimen to be altered. Methods We performed a retrospective review of 205 patient charts and sent a national survey to all surgeon members of the Canadian Orthopaedic Trauma Society (COTS) about antibiotic prophylaxis in the setting of surgical treatment for closed fractures. Results In all, 93% (179 of 193) of patients received an appropriate preoperative dose of antibiotics, whereas less than 32% (58 of 181) of patients received their postoperative antibiotics as ordered. The most commonly stated reason for patients not receiving their postoperative antibiotics as ordered was patients being discharged before completing 3 postoperative doses. There was a 70% (39 of 56) response rate to the survey sent to COTS surgeons. A single dose of a first-generation cephalosporin preoperatively followed by 3 doses postoperatively is the most common practice among orthopedic trauma surgeons across Canada, but several surgeons give only preoperative prophylaxis. Conclusion Adherence to multidose postoperative antibiotic regimens is poor. Meta-analyses have failed to demonstrate the superiority of multidose regimens over single-dose prophylaxis. Single-dose preoperative antibiotic prophylaxis may be a reasonable choice for most orthopedic trauma patients with closed fractures.

Lundine, Kristopher M.; Nelson, Susan; Buckley, Richard; Putnis, Sven; Duffy, Paul J.

2010-01-01

164

Host specificity of parasite manipulation  

PubMed Central

Recently we presented how Camponotus ants in Thailand infected with the fungus Ophiocordyceps unilateralis are behaviorally manipulated into dying where the conditions are optimal for fungal development. Death incurred in a very narrow zone of space and here we compare this highly specific manipulation with a related system in Brazil. We show that the behavioral manipulation is less fine-tuned and discuss the potential explanations for this by examining differences in ant host and environmental characteristics.

2012-01-01

165

Subliminal manipulation of smoking.  

PubMed

Subliminal advertising techniques have increased in usage and are commonly accepted, particularly regarding cigarette smoking. Considering the high cost of such subliminal methods, their use can be justified only by tangible results, measured by an increase in cigarette sales. The results of our studies confirm the physiological and psychological effects of subliminal stimulation that have already been reported in the specialized literature. Our research on smoking prevention led us to study the sophisticated advertising strategies used by the tobacco industry. We have shown that revealing the subliminal stimuli-at least the visual ones-is extremely useful for teenagers. The enlightened teenager becomes able to recognize the subliminal manipulation concealed in advertising, and the risk of becoming its victim. Such educational efforts have their merits, particularly at the school level. PMID:9216802

Frydman, M

1996-01-01

166

Vacuum tool manipulator  

DOEpatents

Apparatus for manipulating a vacuum hose in a reactor vessel comprises a housing with two opposing openings, an arm carried by the housing and deployable from a stowed position essentially completely within the housing to an extended position where the arm extends through the two openings in a generally horizontal position. The arm preferably has a two-fingered gripping device for gripping the vacuum hose but may carry a different end effector such as a grinding wheel. The fingers are opened and closed by one air cylinder. A second air cylinder extends the device. A third air cylinder within the housing pivotally pulls the opposing end of the arm into the housing via a pivoting member pivotally connected between the third air cylinder shaft and the arm. 6 figures.

Zollinger, W.T.

1993-11-23

167

Vacuum tool manipulator  

DOEpatents

Apparatus for manipulating a vacuum hose in a reactor vessel comprises a housing with two opposing openings, an arm carried by the housing and deployable from a stowed position essentially completely within the housing to an extended position where the arm extends through the two openings in a generally horizontal position. The arm preferably has a two-fingered gripping device for gripping the vacuum hose but may carry a different end effector such as a grinding wheel. The fingers are opened and closed by one air cylinder. A second air cylinder extends the device. A third air cylinder within the housing pivotally pulls the opposing end of the arm into the housing via a pivoting member pivotally connected between the third air cylinder shaft and the arm.

Zollinger, William T. (3927 Almon Dr., Martinez, GA 30907)

1993-01-01

168

Interactive protein manipulation  

SciTech Connect

We describe an interactive visualization and modeling program for the creation of protein structures ''from scratch''. The input to our program is an amino acid sequence -decoded from a gene- and a sequence of predicted secondary structure types for each amino acid-provided by external structure prediction programs. Our program can be used in the set-up phase of a protein structure prediction process; the structures created with it serve as input for a subsequent global internal energy minimization, or another method of protein structure prediction. Our program supports basic visualization methods for protein structures, interactive manipulation based on inverse kinematics, and visualization guides to aid a user in creating ''good'' initial structures.

SNCrivelli@lbl.gov

2003-07-01

169

Manipulating and grasping forces in manipulation by multifingered robot hands  

Microsoft Academic Search

A new definition of grasping and manipulating forces for multifingered robot hands is proposed. First, a short discussion of the grasping and manipulating forces for two-fingered hands with linear motion is given to explain the motivation more clearly and to give the basic idea of the new definition. Then, for three-fingered hands, based on a representation of the internal force,

Tsuneo Yoshikawa; Kiyoshi Nagai

1991-01-01

170

Manipulating and Visualizing Proteins  

SciTech Connect

ProteinShop Gives Researchers a Hands-On Tool for Manipulating, Visualizing Protein Structures. The Human Genome Project and other biological research efforts are creating an avalanche of new data about the chemical makeup and genetic codes of living organisms. But in order to make sense of this raw data, researchers need software tools which let them explore and model data in a more intuitive fashion. With this in mind, researchers at Lawrence Berkeley National Laboratory and the University of California, Davis, have developed ProteinShop, a visualization and modeling program which allows researchers to manipulate protein structures with pinpoint control, guided in large part by their own biological and experimental instincts. Biologists have spent the last half century trying to unravel the ''protein folding problem,'' which refers to the way chains of amino acids physically fold themselves into three-dimensional proteins. This final shape, which resembles a crumpled ribbon or piece of origami, is what determines how the protein functions and translates genetic information. Understanding and modeling this geometrically complex formation is no easy matter. ProteinShop takes a given sequence of amino acids and uses visualization guides to help generate predictions about the secondary structures, identifying alpha helices and flat beta strands, and the coil regions that bind them. Once secondary structures are in place, researchers can twist and turn these pre-configurations until they come up with a number of possible tertiary structure conformations. In turn, these are fed into a computationally intensive optimization procedure that tries to find the final, three-dimensional protein structure. Most importantly, ProteinShop allows users to add human knowledge and intuition to the protein structure prediction process, thus bypassing bad configurations that would otherwise be fruitless for optimization. This saves compute cycles and accelerates the entire process, so that more and larger problems can be attempted. Currently, the program designers are working to make ProteinShop more applicable and adaptable to different protein folding methodologies. If users could manipulate structures from a biological point of view, and then put them back in the queue for more optimization, the process of experimentation and discovery in protein research could be greatly enhanced. The group is also investigating the use of stereoscopic rendering and three-dimensional input devices to remove the limitations of a two-dimensional interface. Clearly, protein-folding research will have far-reaching ramifications. It could lead to new insights about diseases ranging from Alzheimer's to Cystic fibrosis, which scientists believe are caused by protein folding gone wrong. A better understanding of protein structures could also lead to the engineering of altogether new proteins, and shed light on how drugs bind proteins to alter their structure and function. Above all, ProteinShop is an important tool that will help scientists unravel one of the most challenging problems that theoretical and computational chemistry has to offer.

Simon, Horst D.

2003-12-05

171

Information Manipulation Through the Media  

Microsoft Academic Search

This article models media manipulation in which a sender or senders manipulate information through the media to influence receivers. This article shows that if there is only 1 sender who has a conditional preference for maintaining its credibility in reporting accurate information and if the receivers face a coordination situation without information about their opponents' types, the sender could influence

Hanjoon Michael Jung

2009-01-01

172

Neurophysiological effects of spinal manipulation  

Microsoft Academic Search

Background context: Despite clinical evidence for the benefits of spinal maniputation and the apparent wide usage of it, the biological mechanisms underlying the effects of spinal manipulation are not known. Although this does not negate the clinical effects of spinal manipulation, it hinders acceptance by the wider scientific and health-care communities and hinders rational strategies for improving the delivery of

Joel G Pickar

2002-01-01

173

Modeling Manipulation in Medical Education  

ERIC Educational Resources Information Center

|As residents and medical students progress through their medical training, they are presented with multiple instances in which they feel they must manipulate the healthcare system and deceive others in order to efficiently treat their patients. This, however, creates a culture of manipulation resulting in untoward effects on trainees' ethical and…

Dailey, Jason I.

2010-01-01

174

Experiments with Desktop Mobile Manipulators  

Microsoft Academic Search

This paper describes our work on Desktop Robotics. The main focus is two robots that locomote and manipulate paper on a desktop. One robot uses wheels for both manipulation and locomotion. The other robot uses wheels for locomotion and a sticky foot to lift and carry pieces of paper. We outline the goals of our work on desktop robotics, describe

Matthew T. Mason; Dinesh K. Pai; Daniela Rus; Jon Howell; Lee R. Taylor; Michael A. Erdmann

1999-01-01

175

Task Compatibility of Manipulator Postures  

Microsoft Academic Search

Inperforming a manipulation task, humans tend to adopt arm postures that most effectively utilize the motion and strength capabilities of the arm. Selecting arm postures that are compatible with the task requirements has become almost instinctive to humans. By mimicking this approach in robotic manipulation, we can exploit the full capability of a manipu lator in performing a task. An

Stephen L. Chiu

1988-01-01

176

Image Manipulation: Then and Now.  

ERIC Educational Resources Information Center

|The images of photography have been manipulated almost from the moment of their discovery. The blending together in the studio and darkroom of images not found in actual scenes from life has been a regular feature of modern photography in both art and advertising. Techniques of photograph manipulation include retouching; blocking out figures or…

Sutton, Ronald E.

177

Micro teleoperation with parallel manipulator  

Microsoft Academic Search

In this paper, we discuss about micro teleoperation with haptic interfaces. We developed the micro teleoperation systems for micro tasks, such as assembly or manufacturing. We show about structure of master\\/slave manipulators, its control and experimental results of teleoperation with the manipulators in this paper. We introduce the haptic interface that provides operators the sense as if he\\/she touches the

Noriaki ANDO; Masahito OHTA; H. Hashimoto

2000-01-01

178

Neurophysiological effects of spinal manipulation  

Microsoft Academic Search

Background context: Despite clinical evidence for the benefits of spinal maniputation and the appar- ent wide usage of it, the biological mechanisms underlying the effects of spinal manipulation are not known. Although this does not negate the clinical effects of spinal manipulation, it hinders acceptance by the wider scientific and health-care communities and hinders rational strategies for improving the delivery

Joel G. Pickar

2002-01-01

179

Concurrent set manipulation without locking  

Microsoft Academic Search

Set manipulation consists of the actions insert, delete, and member on keys. We propose a concurrent set manipulation algorithm that uses no locking at all and requires no aborts, relying instead on atomic read-modify-write operations on single (data) locations. The algorithm satisfies order-preserving serializability through conditions that are strictly looser than existing algorithms

Vladimir Lanin; Dennis Shasha

1988-01-01

180

Bone drilling haptic interaction for orthopedic surgical simulator.  

PubMed

Drilling procedure is widely used in orthopedic surgery to position reduced fractured bones and prosthetic components. However, successful execution of bone drilling requires a high level of dexterity and experience, because the drilling resistance is large and sometimes vibrates violently to difficultly grasp the hand-piece or even break the slender drill. This paper introduces haptic functions that are added to a volume based surgical simulator to simulate the drilling process. These haptic functions compute drilling forces and torques based on reliable metal removing theorem. Therefore, accurate prediction for the drilling process can be obtained to provide effective surgery training and rehearsal. A simulation example of screw and plate surgery for positioning the hip trochanter fracture illustrates the practicality and versatility of the proposed method. PMID:17568576

Tsai, Ming-Dar; Hsieh, Ming-Shium; Tsai, Chiung-Hsin

2007-06-12

181

Infection Mitigation Efficacy of Photoactive Titania on Orthopedic Implant Materials  

PubMed Central

In order to impede infection and achieve accelerated wound healing in the postorthopaedic surgery patients, a simple and benign procedure for creating nanotubular or nanofibrillar structure of photoactive TiO2 on the surface of Ti plates and wires is described. The nanoscale TiO2 films on titanium were grown by hydrothermal processing in one case and by anodization in the presence of dilute mineral acids under mild and benign conditions in the other. Confocal microscopy results demonstrated at least 50% reduction in the population of E. coli colonies (concentration 2.15 × 107?cells/mL) on TiO2-coated implants upon an IR exposure of up to 30?s; it required ?20?min of exposure to UV beam for the same effect. These findings suggest the probability of eliminating wound infection during and after orthopedic surgical procedures by brief illumination of photoactive titania films on the implants with an IR beam.

Azad, Abdul-Majeed; Hershey, Ryan; Aboelzahab, Asem; Goel, Vijay

2011-01-01

182

[The use of a rapid infusion system in orthopedics].  

PubMed

Major orthopedic surgery such as partial resection of the pelvis and subsequent implantation of a prosthesis is highly connected with massive bleeding. Therefore we tested the hypothesis that the use of a rapid infusion device, which was originally designed for liver transplantations, can prevent hypovolemic shock. We studied 20 patients: in one group (n = 10) the iv volume was given in a conventional way (37 degrees C) by use of pressure infusion bags. Patients of the second group (n = 10) received the iv volume via the Rapid Infusion system (Haemonetics Corp., Braintree, MA). We can conclude that with this new device for rapid volume replacement it is possible to keep the patient's vital functions stable even during times of excessive bleeding and to prevent from metabolic consequences following hypovolemic shock. PMID:7831946

Kurz, A; Geyer, R; Heilinger, D; Popov, M; Farynjak, B; Hackl, W; Windhager, R; Kotz, R; Redl, G

183

Barriers to the Clinical Translation of Orthopedic Tissue Engineering  

PubMed Central

Tissue engineering and regenerative medicine have been the subject of increasingly intensive research for over 20 years, and there is concern in some quarters over the lack of clinically useful products despite the large sums of money invested. This review provides one perspective on orthopedic applications from a biologist working in academia. It is suggested that the delay in clinical application is not atypical of new, biologically based technologies. Some barriers to progress are acknowledged and discussed, but it is also noted that preclinical studies have identified several promising types of cells, scaffolds, and morphogenetic signals, which, although not optimal, are worth advancing toward human trials to establish a bridgehead in the clinic. Although this transitional technology will be replaced by more sophisticated, subsequent systems, it will perform valuable pioneering functions and facilitate the clinical development of the field. Some strategies for achieving this are suggested.

2011-01-01

184

Orthopedic Correction of Growing Hyperdivergent, Retrognathic, Patients with Miniscrew Implants  

PubMed Central

Traditional orthodontic treatments do not adequately address the skeletal problems of retrognathic, hyperdivergent, Class II adolescents; the few approaches that do require long-term patient compliance. This paper introduces a novel approach using miniscrew implants (MSIa) and growth to treat retrognathic hyperdivergent adolescents. Nine consecutive patients were evaluated at the start of treatment (13.2 ±1.1 years of age) and again at the end of the orthopedic phase (after 1.9 ±0.3 years). Each patient had two MSIs placed in either side of the palate. Coil springs (150 g) extended from the MSIs to a RPE, which served as a rigid segment for intruding the maxillary premolar and molars. Two additional MSIs were placed between the first mandibular molars and second premolars; coil spring (150 g) extended from the MSIs to hold or intrude the mandibular molars. Prior to treatment, the patients exhibited substantial and significant mandibular retrusion (Z-score=?1.0), facial convexity (Z-score=0.7), and hyperdivergence (Z-score=1.6). Treatment produced consistent and substantial orthopedic effects. The chin was advanced an average of 2.4 mm, the SNB angle increased by 2.1°, the mandibular plane angle decreased 3.9°, and facial convexity decreased by approximately 3.2°. Questionnaires showed that this treatment approach was not painful or uncomfortable; the majority of the patients indicated that they were very likely to recommend the treatment to others. Treatment was accomplished by titrating the amount of orthodontic intrusion performed based on the individuals’ growth potential.

Buschang, Peter H.; Carrillo, Roberto; Rossouw, P. Emile

2010-01-01

185

Applications of finite element simulation in orthopedic and trauma surgery  

PubMed Central

Research in different areas of orthopedic and trauma surgery requires a methodology that allows both a more economic approach and the ability to reproduce different situations in an easy way. Simulation models have been introduced recently in bioengineering and could become an essential tool in the study of any physiological unity, regardless of its complexity. The main problem in modeling with finite elements simulation is to achieve an accurate reproduction of the anatomy and a perfect correlation of the different structures, in any region of the human body. Authors have developed a mixed technique, joining the use of a three-dimensional laser scanner Roland Picza captured together with computed tomography (CT) and 3D CT images, to achieve a perfect reproduction of the anatomy. Finite element (FE) simulation lets us know the biomechanical changes that take place after hip prostheses or osteosynthesis implantation and biological responses of bone to biomechanical changes. The simulation models are able to predict changes in bone stress distribution around the implant, so allowing preventing future pathologies. The development of a FE model of lumbar spine is another interesting application of the simulation. The model allows research on the lumbar spine, not only in physiological conditions but also simulating different load conditions, to assess the impact on biomechanics. Different degrees of disc degeneration can also be simulated to determine the impact on adjacent anatomical elements. Finally, FE models may be useful to test different fixation systems, i.e., pedicular screws, interbody devices or rigid fixations compared with the dynamic ones. We have also developed models of lumbar spine and hip joint to predict the occurrence of osteoporotic fractures, based on densitometric determinations and specific biomechanical models, including approaches from damage and fracture mechanics. FE simulations also allow us to predict the behavior of orthopedic splints applied to the correction of deformities, providing the recovering force-displacement and angle-moment curves that characterize the mechanical behavior of the splint in the overall range of movement.

Herrera, Antonio; Ibarz, Elena; Cegonino, Jose; Lobo-Escolar, Antonio; Puertolas, Sergio; Lopez, Enrique; Mateo, Jesus; Gracia, Luis

2012-01-01

186

Hydroxyapatite-nanotube composites and coatings for orthopedic applications  

NASA Astrophysics Data System (ADS)

Hydroxyapatite (HA) has received wide attention in orthopedics, due to its biocompatibility and osseointegration ability. Despite these advantages, the brittle nature and low fracture toughness of HA often results in rapid wear and premature fracture of implant. Hence, there is a need to improve the fracture toughness and wear resistance of HA without compromising its biocompatibility. The aim of the current research is to explore the potential of nanotubes as reinforcement to HA for orthopedic implants. HA- 4 wt.% carbon nanotube (CNT) composites and coatings are synthesized by spark plasma sintering and plasma spraying respectively, and investigated for their mechanical, tribological and biological behavior. CNT reinforcement improves the fracture toughness (>90%) and wear resistance (>66%) of HA for coating and free standing composites. CNTs have demonstrated a positive influence on the proliferation, differentiation and matrix mineralization activities of osteoblasts, during in-vitro biocompatibility studies. In-vivo exposure of HA-CNT coated titanium implant in animal model (rat) shows excellent histocompatibility and neobone integration on the implant surface. The improved osseointegration due to presence of CNTs in HA is quantified by the adhesion strength measurement of single osteoblast using nano-scratch technique. Considering the ongoing debate about cytotoxicity of CNTs in the literature, the present study also suggests boron nitride nanotube (BNNT) as an alternative reinforcement. BNNT with the similar elastic modulus and strength as CNT, were added to HA. The resulting composite having 4 wt.% BNNTs improved the fracture toughness (˜85%) and wear resistance (˜75%) of HA in the similar range as HA-CNT composites. BNNTs were found to be non-cytotoxic for osteoblasts and macrophages. In-vitro evaluation shows positive role of BNNT in osteoblast proliferation and viability. Apatite formability of BNNT surface in ˜4 days establishes its osseointegration ability.

Lahiri, Debrupa

187

Manipulability, force, and compliance analysis for planar continuum manipulators.  

PubMed

Continuum manipulators, inspired by the natural capabilities of elephant trunks and octopus tentacles, may find niche applications in areas like human-robot interaction, multiarm manipulation, and unknown environment exploration. However, their true capabilities will remain largely inaccessible without proper analytical tools to evaluate their unique properties. Ellipsoids have long served as one of the foremost analytical tools available to the robotics researcher, and the purpose of this paper is to first formulate, and then to examine, three types of ellipsoids for continuum robots: manipulability, force, and compliance. PMID:12492083

Gravagne, Ian A; Walker, Ian D

2002-06-01

188

Comparing Mechanisms by their Vulnerability to Manipulation  

Microsoft Academic Search

This paper introduces a method to compare direct mechanisms based on their vulnera- bility to manipulation or deviation from truthful reporting. We explore the following idea: if a player can manipulate mechanism whenever some player can manipulate mechanism ', then is more manipulable than '. Our notion generates a partial ordering on mech- anisms based on their degree of manipulability.

Parag A. Pathak; Tayfun Sonmez

189

Wallenberg's syndrome following neck manipulation.  

PubMed

We describe 4 patients ages 28 to 41 with lateral medullary infarction (Wallenberg's syndrome) following chiropractic neck manipulation. In 3 patients, angiography documented dissection of the extracranial 3rd segment of the vertebral artery near the atlantoaxial joint. The onset of neurologic symptoms following manipulation varied from immediate to 4 days. All had good recovery with minor residual deficits. Although the association between chiropractic neck manipulation and vertebral-basilar artery distribution infarction is well known, we emphasize its occurrence in young healthy individuals without commonly regarded predisposing factors. PMID:2181339

Frumkin, L R; Baloh, R W

1990-04-01

190

Manipulability and object recognition: is manipulability a semantic feature?  

PubMed

Several lines of evidence exist, coming from neuropsychology, neuroimaging and behavioural investigations on healthy subjects, suggesting that an interaction might exist between the systems devoted to object identification and those devoted to online object-directed actions and that the way an object is acted upon (manipulability) might indeed influence object recognition. In this series of experiments on speeded word-to-picture-matching tasks, it is shown how the presentation of pairs of objects sharing similar manipulation causes greater interference with respect to objects sharing only visual similarity (experiment 1). Moreover, (experiment 2) it is shown how the repeated presentation of pairs of objects sharing a similar type of manipulation leads to a 'negative' serial position effect, with the number of errors increasing across presentations, a behaviour that is typically found in patients with access deficits to semantic representations. By contrast, the repeated presentation of pairs of objects sharing only visual similarity leads to an opposite 'positive' serial position effect, with errors decreasing across presentations. It is argued that a negative serial position effect is linked to interference occurring within the semantic system, and therefore that the way an object is manipulated is indeed a semantic feature, critical in defining manipulable object properties at a semantic level. To our knowledge, this constitutes the first direct evidence of manipulability being a semantic dimension. The results are discussed in the light of current models of semantic memory organization. PMID:21113583

Campanella, Fabio; Shallice, Tim

2010-11-27

191

Adaptation of NASA Technology for the Optimization of Orthopedic Knee Implants.  

National Technical Information Service (NTIS)

The NASA technology originally developed for the optimization of composite structures (engine blades) is adapted and applied to the optimization of orthopedic knee implants. A method is developed enabling the tailoring of the implant for optimal interacti...

D. A. Saravanos P. J. Mraz D. A. Hopkins

1991-01-01

192

Hematuria after Orthopedic Tuina: A Case Report and Brief Review of Literature  

PubMed Central

We present a case of a 24-year-old man who presented hematuria after the orthopedic tuina, which has not been recorded previously in the literature. We review complications of tuina in the literature too.

Ying, Xiao-Ming; Wang, Peng; Yao, Ben-Shun; Gu, Hai-Yang; Xu, Quan-Zhen

2011-01-01

193

Bias towards publishing positive results in orthopedic and general surgery: a patient safety issue?  

Microsoft Academic Search

BACKGROUND: Research articles reporting positive findings in the fields of orthopedic and general surgery appear to be represented at a considerably higher prevalence in the peer-reviewed literature, compared to published studies on negative or neutral data. This \\

Erik A Hasenboehler; Imran K Choudhry; Justin T Newman; Wade R Smith; Bruce H Ziran; Philip F Stahel

2007-01-01

194

In-Vivo Orthopedic Implant Diagnostic Device for Sensing Load, Wear, and Infection.  

National Technical Information Service (NTIS)

A device for providing in vivo diagnostics of loads, wear, and infection in orthopedic implants having at least one load sensor associated with the implant, at least one temperature sensor associated with the implant, at least one vibration sensor associa...

B. M. Evans D. A. Dennis R. D. Komistek T. G. Thundat

2004-01-01

195

The Effectiveness of Active and Traditional Teaching Techniques in the Orthopedic Assessment Laboratory  

NSDL National Science Digital Library

Active learning is a teaching methodology with a focus on student-centered learning that engages students in the educational process. This study implemented active learning techniques in an orthopedic assessment laboratory, and the effects of these teachi

Nottingham, Sara; Verscheure, Susan

2010-05-01

196

Internal forces during object manipulation  

PubMed Central

Internal force is a set of contact forces that does not disturb object equilibrium. The elements of the internal force vector cancel each other and, hence, do not contribute to the resultant (manipulation) force acting on the object. The mathematical independence of the internal and manipulation forces allows for their independent (decoupled) control realized in robotic manipulators. To examine whether in humans internal force is coupled with the manipulation force and what grasping strategy the performers utilize, the subjects (n=6) were instructed to make cyclic arm movements with a customized handle. Six combinations of handle orientation and movement direction were tested. These involved: parallel manipulations (1) VV task (vertical orientation and vertical movement) and (2) HH task (horizontal orientation and horizontal movement); orthogonal manipulations (3) VH task (vertical orientation and horizontal movement) and (4) HV task (horizontal orientation and vertical movement); and diagonal manipulations (5) DV task (diagonal orientation and vertical movement) and (6) DH task (diagonal orientation and horizontal movement). Handle weight (from 3.8 to 13.8 N), and movement frequency (from 1 to 3 Hz) were systematically changed. The analysis was performed at the thumb-virtual finger level (VF, an imaginary finger that produces a wrench equal to the sum of wrenches produced by all the fingers). At this level, the forces of interest could be reduced to the internal force and internal moment. During the parallel manipulations, the internal (grip) force was coupled with the manipulation force (producing object acceleration) and the thumb-VF forces increased or decreased in phase: the thumb and VF worked in synchrony to grasp the object more strongly or more weakly. During the orthogonal manipulations, the thumb-VF forces changed out of phase: the plots of the internal force vs. object acceleration resembled an inverted letter V. The HV task was the only task where the relative phase (coupling) between the normal forces of the thumb and VF depended on oscillation frequency. During the diagonal manipulations, the coupling was different in the DV and DH tasks. A novel observation of substantial internal moments is described: the moments produced by the normal finger forces were counterbalanced by the moments produced by the tangential forces such that the resultant moments were close to zero. Implications of the findings for the notion of grasping synergies are discussed.

Gao, Fan; Latash, Mark L.; Zatsiorsky, Vladimir M.

2010-01-01

197

Randomized prospective study on prophylactic antibiotics in clean orthopedic surgery in one ward for 1 year  

Microsoft Academic Search

Background  At present in Japan, there are neither reports on antibiotic prophylaxis regardless of underlying diseases nor precise guidelines\\u000a on prophylactic antibiotics in orthopedic surgery. Therefore, the preventive effect of antimicrobial agents on surgical site\\u000a infection (SSI) after clean orthopedic surgery was studied to control the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in our ward and to reduce SSI caused by

Daisuke Kato; Katsuhiko Maezawa; Ikuho Yonezawa; Yoshiyuki Iwase; Hiroshi Ikeda; Masahiko Nozawa; Hisashi Kurosawa

2006-01-01

198

Greater osteoblast functions on multiwalled carbon nanotubes grown from anodized nanotubular titanium for orthopedic applications  

NASA Astrophysics Data System (ADS)

Titanium (Ti) is the most widely implanted orthopedic material. However, current formulations of Ti have an average orthopedic implant functional lifetime of only 10-15 years. While there are many reasons why orthopedic implants fail, one is a lack of initial and sustained integration into juxtaposed bone. To improve the cytocompatibility properties of Ti for orthopedic applications, parallel multiwalled carbon nanotubes (CNTs) were grown from the pores of anodized nanotubular Ti by a chemical vapor deposition process in the present study. The results of this study provided evidence, for the first time, that osteoblast (bone forming cell) functions (specifically, alkaline phosphatase activity and calcium deposition) were significantly greater on CNTs grown from anodized Ti than on anodized Ti without CNTs and currently-used Ti in orthopedics for up to 21 days. In summary, this study showed that bone growth could possibly be enhanced on currently-used Ti implants with protruding CNTs and, thus, they should be further studied for orthopedic applications.

Sirivisoot, Sirinrath; Yao, Chang; Xiao, Xingcheng; Sheldon, Brian W.; Webster, Thomas J.

2007-09-01

199

[Prophylaxis of venous thromboembolic disease in high-risk orthopedic surgery].  

PubMed

Venous thromboembolism (VTE) is a worldwide public health problem, with an annual incidence of 1-2 cases/1,000 individuals in the general population and a 1-5% associated mortality. Orthopedic surgery is a major surgical risk factor for VTE, but the problem is more important for patients with hip and knee joint replacement, multiple traumatisms, severe damage to the spine, or large fractures. Thromboprophylaxis is defined as the strategy and actions necessary to diminish the risk of VTE in high-risk orthopedic surgery. Antithrombotics may prevent VTE. At the end of this paper, we describe a proposal of thromboprophylaxis actions for patients requiring high-risk orthopedic surgery, based on the opinion of specialists in Orthopedics and Traumatology who work with high-risk orthopedic surgery patients. A search for evidence about this kind of surgery was performed and a 100-item inquiring instrument was done in order to know the opinions of the participants. Then, recommendations and considerations were built. In conclusion, this document reviews the problem of VTE in high-risk orthopedic surgery patients and describes the position of the Colegio Mexicano de Ortopedia y Traumatología related to VTE prevention in this setting. PMID:22622314

Meza Reyes, Gilberto Eduardo; Esquivel Gómez, Ricardo; Martínez del Campo Sánchez, Antonio; Espinosa-Larrañaga, Francisco; Martínez Guzmán, Miguel Ángel Enrique; Torres González, Rubén; de la Fuente Zuno, Juan Carlos; Méndez Huerta, Juan Vicente; Villalobos Garduño, Enrique; Cymet Ramírez, José; Ibarra Hirales, Efrén; Díaz Borjón, Efraín; Aguilera Zepeda, José Manuel; Valles Figueroa, Juan Francisco; Majluf-Cruz, Abraham

200

II Italian intersociety consensus statement on antithrombotic prophylaxis in orthopedics and traumatology.  

PubMed

Pharmacological prophylaxis for preventing venous thromboembolism (VTE) is a worldwide established procedure in hip and knee replacement surgery, as well as in the treatment of femoral neck fractures, but few data exist to its regard in other fields of orthopedics and traumatology. Indeed, no guidelines or recommendations are available in the literature, except for a limited number of weak statements about knee arthroscopy and lower limb fractures. The present paper represents the first multidisciplinary effort to provide suggestions on the prophylaxis of VTE in the remaining fields of orthopedic surgery (minor orthopedic surgery and orthopedic trauma). The Italian Society for Studies on Hemostasis and Thrombosis (SISET), the Italian Society of Orthopedics and Traumatology (SIOT) and the association of Orthopedic Traumatology of Italian Hospitals (OTODI) together with the Italian Society of Anesthesia, Analgesia, Resuscitation and Intensive Care (SIAARTI) and the Italian Society of General Medicine (SIMG) have set down quick and easy suggestions for VTE prophylaxis in a number of surgical conditions for which only scarce evidence is available. This inter-society consensus statement aims at simplifying the approach to VTE prophylaxis in the single patient with the goal of improving its clinical application. PMID:23511358

Della Rocca, G; Danelli, G; Randelli, F; Romanini, E; Biggi, F; Laurora, N R; Imberti, D; Palaretti, G; Prisco, D

2013-03-19

201

Economies of scale, physician volume for orthopedic surgical patients, and the DRG prospective payment system.  

PubMed

American hospitals face increasing constraints due to a variety of factors. Federal and state diagnostic-related group (DRG) prospective hospital pricing has caused tremendous fiscal pressure on hospitals; many face substantial financial deficits. We analyzed the volume of orthopedic surgical procedures performed by an individual orthopedic surgeon for all patients (N = 2,134) treated for a 3-year period at a large academic medical center; these surgeons were arbitrarily divided into low volume or high volume. Patients of low volume surgeons had a longer hospital length of stay and hospital cost (after correction for DRG case mix and severity of illness), greater financial risk under DRGs, and a poorer outcome, compared with patients of higher volume orthopedic surgeons. Pearson correlation showed an inverse relationship between cost per patient and physician volume for nonemergency patients -0.201 (P less than .0001), and emergency patients, -0.321 (P less than .0001). Although the reasons for these findings appeared multifactoral, they raise important issues related to orthopedic surgical hospital costs, access, and quality of care. In addition, they suggest that hospital cost for these patients (and perhaps outcome) may be related to orthopedic surgical volume, and that DRG hospital payment (on the margin) may affect future orthopedic surgical practice opportunities. PMID:2105484

Munoz, E; Boiardo, R; Mulloy, K; Goldstein, J; Brewster, J G; Tenenbaum, N; Wise, L

1990-01-01

202

Nanophase hydroxyapatite coatings for dental and orthopedic applications  

NASA Astrophysics Data System (ADS)

In order to improve dental and orthopedic implant performance, the objective of this study was to synthesize nanocrystalline hydroxyapatite (HA) powders to coat metals (specifically, titanium and tantalum). Precipitated HA powders were either sintered in order to produce UltraCaP HA (or microcrystalline size HA) or were treated hydrothermally to produce nanocrystalline HA. Some of the UltraCaP and nanocrystalline HA powders were doped with yttrium (Y) since previous in vitro studies demonstrated that Y-doped HA in bulk improved osteoblast (or bone-forming cell) function over undoped HA. The nanocrystalline HA powders were also mixed with nanophase titania powders because previous studies demonstrated that titania/HA composite coatings increased coating adhesive strength and HA nucleation. These powders were then deposited onto titanium by a novel room-temperature process, called IonTiteT(TM). The results demonstrated that the chemical properties and crystallite size of the original HA powders were maintained in the coatings. More importantly, in vitro studies showed increased osteoblast (bone-forming cell) adhesion on the single phase nanocrystalline HA and nano-titania/HA coatings compared to traditionally used plasma-sprayed HA coatings and uncoated metals. Results further demonstrated greater amounts of calcium deposition by osteoblasts cultured on nanocrystalline HA coatings compared to UltraCaP coatings and conventionally used plasma-sprayed HA coatings. To elucidate mechanisms that influenced osteoblast functions on the HA coatings, the amount of proteins (fibronectin and vitronectin) onto the HA powders and the adsorbed fibronectin conformation were investigated. Exposure of cell integrin binding domains (in fibronectin III10 segments) was greater in fibronectin adsorbed onto 1.2 mole% Y-doped UltraCaP HA coatings compared to nanocrystalline HA coatings tested. However, 1.2 mole% Y-doped UltraCaP HA coatings did not increase mineralization by osteoblasts compared to the nanocrystalline HA coatings. These results suggested that the availability of integrin binding domains in fibronectin did not correlate to enhanced mineralization by osteoblasts on nanocrystalline HA coatings. Lastly, undoped nanocrystalline HA coatings were studied using a well-established rat calvaria in vivo. Histological analysis showed that nanocrystalline HA coated on tantalum scaffolds increased bone and fibrous tissue infiltration into the scaffolds while uncoated and UltraCaP HA coated scaffolds did not after as early as 6 weeks. In summary, these results encourage further studies on nanocrystalline IonTiteTM HA coatings on various metals for orthopedic and dental applications.

Sato, Michiko

203

[Damage Control Orthopedics. What is the current situation?].  

PubMed

Damage Control Orthopedics is a strategy for treatment of fractures in severely injured patients. The aim is to reduce secondary damage and thereby improve the patient's outcome. The relevant fractures are primarily stabilized with external fixators instead of a primary definitive osteosynthesis. The less traumatic and shorter surgical procedure is thought to reduce the additional trauma load and should thereby minimize the "second hit" situation. After stabilization of the patient on the intensive care unit secondary definitive ostesynthesis can then be performed after 4-14 days.The available animal studies, retrospective clinical studies and prospective cohort studies seem to support the concept of damage control. The only available randomized study shows an advantage of this strategy in a subgroup of borderline patients. A meta-analysis could not find convincing evidence that definitively proves the advantage of this concept. A new multi-center randomized study has been started to evaluate the concept of damage control in a defined group of critically injured patients with femoral shaft fractures. PMID:19756456

Bouillon, B; Rixen, D; Maegele, M; Steinhausen, E; Tjardes, T; Paffrath, T

2009-10-01

204

[Technical aspects in the provision of orthopedic shoes for athletes].  

PubMed

From the technical point of view different groups must be distinguished in the provision of orthopedic shoes for athletes. The one group encompasses athletes who are provided with insoles in the hope of improved comfort or better performance. The other group includes athletes with diseases or injuries of the lower limbs for whom the provision of appropriate shoes and insoles makes it possible for them to participate again actively in their chosen sport. In such cases one has to differentiate between the purely physical disorder of the foot and biomechanical disorders. For the first group the correct fitting of the shoe is the most important factor whereas in the second group attempts are made to correct and/or compensate for the deficit by means of insoles and wedges as well as supporting or bedding elements. The particular challenge for all such measures is to achieve an as small as possible impairment on the sport activity or, in the ideal cases, even to support it. PMID:23487344

Walther, M; Volkering, C; Röser, A

2013-03-13

205

Finite element lifetime prediction of a miniature adjustable orthopedic device.  

PubMed

In Total Knee Arthroplasty (TKA), accurate balancing of the medial and lateral collateral ligaments is considered by orthopedic surgeons as one of the most challenging and complicated tasks to achieve. Therefore, an efficient solution is needed to assist the surgeons in achieving this crucial task without resulting in tibiofemoral misalignment. The required solution consists in developing either a completely automated smart ligament balancer for intraoperative use or adjustable tibial implant for postoperative use. The smart ligament balancer allows the surgeon to accurately balance the collateral ligaments at the time of surgery while the adjustable tibial implant can be controlled in the postoperative period in order to correct the residual ligament imbalance. In this paper, we propose a miniature device that can be used as a smart ligament balancer during TKA or as an adjustable tibial implant in the period following the surgery. Three designs of the smart ligament balancer have been developed using 3-Dimensional (3D) Computer Assisted Design (CAD) software. The proposed balancer can also be used as an adjustable tibial implant after slightly modifying its design. Finite element study of each design has been conducted in order to predict the lifetime of this implant in both cases of intraoperative or postoperative uses. PMID:23366812

Almouahed, Shaban; Hamitouche, Chafiaa; Stindel, Eric; Roux, Christian

2012-01-01

206

PEEK Biomaterials in Trauma, Orthopedic, and Spinal Implants  

PubMed Central

Since the 1980s, polyaryletherketones (PAEKs) have been increasingly employed as biomaterials for trauma, orthopedic, and spinal implants. We have synthesized the extensive polymer science literature as it relates to structure, mechanical properties, and chemical resistance of PAEK biomaterials. With this foundation, one can more readily appreciate why this family of polymers will be inherently strong, inert, and biocompatible. Due to its relative inertness, PEEK biomaterials are an attractive platform upon which to develop novel bioactive materials, and some steps have already been taken in that direction, with the blending of HA and TCP into sintered PEEK. However, to date, blended HA-PEEK composites have involved a trade-off in mechanical properties in exchange for their increased bioactivity. PEEK has had the greatest clinical impact in the field of spine implant design, and PEEK is now broadly accepted as a radiolucent alternative to metallic biomaterials in the spine community. For mature fields, such as total joint replacements and fracture fixation implants, radiolucency is an attractive but not necessarily critical material feature.

Kurtz, S. M.; Devine, J. N.

2007-01-01

207

Functional orthopedic magnetic appliance (FOMA) III--modus operandi.  

PubMed

An intraoral intermaxillary appliance has been developed for the treatment of Class III malocclusions that exhibit midface sagittal deficiency with or without mandibular excess. The functional orthopedic magnetic appliance (FOMA) III consists of upper and lower acrylic plates with a permanent magnet incorporated into each plate. The upper magnet is linked to a retraction screw. The upper magnet is retracted periodically (e.g., monthly) to stimulate maxillary advancement and mandibular retardation. The attractive mode neodymium magnets used in this study produced a horizontal force of 98 gm and a vertical force of 371 gm. Six female Macaca fascicularis monkeys were treated with FOMA IIIs. An additional three animals were treated with sham appliances. After 4 months of treatment, the following results were found: the growth pattern of the cranial base (saddle angle) was not altered; midfacial protraction did occur along a recumbent hyperbolic curve with a horizontal maxillary displacement and an anterosuperior premaxillary rotation; the cumulative protraction of the maxillary complex was initiated at the pterygomaxillary fissure with an additional contribution provided by other circummaxillary sutures (zygomaticomaxillary s., transverse s., premaxillary s.); and inhibition of mandibular length was minimal, but a tendency toward a vertical condylar growth pattern was observed. The interaction between sutural and condylar growth sites appeared biphasic, characterized by an immediate and rapid excitation of the circummaxillary sutures followed by a delayed and slow suppression of the condylar cartilage. Long-term animal and clinical FOMA III studies are recommended. PMID:2301300

Vardimon, A D; Graber, T M; Voss, L R; Muller, T P

1990-02-01

208

Tissue engineering strategies for the regeneration of orthopedic interfaces.  

PubMed

A major focus in the field of orthopedic tissue engineering is the development of tissue engineered bone and soft tissue grafts with biomimetic functionality to allow for their translation to the clinical setting. One of the most significant challenges of this endeavor is promoting the biological fixation of these grafts with each other as well as the implant site. Such fixation requires strategic biomimicry to be incorporated into the scaffold design in order to re-establish the critical structure-function relationship of the native soft tissue-to-bone interface. The integration of distinct tissue types (e.g. bone and soft tissues such as cartilage, ligaments, or tendons), necessitates a multi-phased or stratified scaffold with distinct yet continuous tissue regions accompanied by a gradient of mechanical properties. This review discusses tissue engineering strategies for regenerating common tissue-to-tissue interfaces (ligament-to-bone, tendon-to-bone, or cartilage-to-bone), and the strategic biomimicry implemented in stratified scaffold design for multi-tissue regeneration. Potential challenges and future directions in this emerging field will also be presented. It is anticipated that interface tissue engineering will enable integrative soft tissue repair, and will be instrumental for the development of complex musculoskeletal tissue systems with biomimetic complexity and functionality. PMID:20422291

Lu, Helen H; Subramony, Siddarth D; Boushell, Margaret K; Zhang, Xinzhi

2010-04-27

209

Prevention of VTE in patients having major orthopedic surgery.  

PubMed

Venous thromboembolism (VTE) is a serious risk after major orthopedic surgery (MOS) including total knee replacement, total hip replacement and hip fracture surgery. This risk can be reduced with several pharmacologic and mechanical prophylactic approaches, and the choice among them depends on their ability to reduce VTE with an acceptable increase in adverse events, especially major bleeding complications. Improvements in medical and surgical care have led to a progressive decrease in the risk of VTE after MOS with an estimated baseline risk with contemporary practice of approximately 4.3 % up to day 39 after surgery. Low-molecular-weight heparin is the most thoroughly studied thromboprophylactic agent following MOS and demonstrates good effectiveness with an acceptable rate of bleeding complications. Warfarin, rivaroxaban, dabigatran, and apixaban have all been studied in large trials in comparison with low-molecular-weight heparin and also show an acceptable benefit: risk ratio. Mechanical approaches including graduated compression stockings, intermittent pneumatic compression and venous foot pump also offer protection against VTE, but there is less evidence is available regarding their effectiveness and risks. Combination therapy consisting of an antithrombotic agent and mechanical device is probably more effective than either alone. The appropriate use of thromboprophylaxis after MOS results in reduced VTE with acceptable bleeding risks. PMID:23397496

Francis, Charles W

2013-04-01

210

Singularity analysis of planar parallel manipulators  

Microsoft Academic Search

With regard to planar parallel-manipulators, a general classification of singularities into three groups is introduced. The classification scheme relies on the properties of the Jacobian matrices of the manipulator at hand. The Jacobian matrices of two classes of planar parallel manipulators are derived and the three types of singularities are identified for them. The first class contains 20 manipulators constructed

H. R. Mohammadi Daniali; P. J. Zsombor-Murray; J. Angeles

1995-01-01

211

Virtual Object Manipulation Using Physical Blocks  

Microsoft Academic Search

In this paper, we present a virtual object manipulation tool that can directly control virtual objects using physical objects. Physical objects can be recognized by vision based sensing. Basic manipulations using physical objects are translating, rotating, scaling and replacing with a virtual object. Those manipulations are performed by handling an object, a block. In addition to this, complicated manipulations can

Satoshi Yonemoto; Takahiro Yotsumoto; Rin-ichiro Taniguchi

2007-01-01

212

Heavy Material Handling Manipulator for Agricultural Robot  

Microsoft Academic Search

This paper presents a manipulator which is able to handle heavy materials for agricultural applications. The characteristics of agricultural operation are discussed and extracted. As the manipulator for handling heavy materials is analyzed using kinematic indices, the parallel type manipulator is shown to be superior to the other manipulators (i.e. the polar coordinate type, articulated type and cylindrical coordinate type

Satoru Sakai; Michihisa Iida; Mikio Umeda

2002-01-01

213

Visceral responses to spinal manipulation.  

PubMed

While spinal manipulation is widely seen as a reasonable treatment option for biomechanical disorders of the spine, such as neck pain and low back pain, the use of spinal manipulation to treat non-musculoskeletal complaints remains controversial. This controversy is due in part to the perception that there is no robust neurobiological rationale to justify using a biomechanical treatment of the spine to address a disorder of visceral function. This paper therefore looks at the physiological evidence that spinal manipulation can impact visceral function. A structured search was conducted, using PubMed and the Index to Chiropractic Literature, to construct of corpus of primary data studies in healthy human subjects of the effects of spinal manipulation on visceral function. The corpus of literature is not large, and the greatest number of papers concerns cardiovascular function. Authors often attribute visceral effects of spinal manipulation to somato-autonomic reflexes. While this is not unreasonable, little attention is paid to alternative mechanisms such as somato-humoural pathways. Thus, while the literature confirms that mechanical stimulation of the spine modulates some organ functions in some cohorts, a comprehensive neurobiological rationale for this general phenomenon has yet to appear. PMID:22440554

Bolton, Philip S; Budgell, Brian

2012-03-20

214

Low-Back Pain: An Orthopedic Medicine Approach  

PubMed Central

Many patients suffering from low-back pain present to a family physician. This paper will deal specifically with the moving parts of the lumbar spine as the source of low-back pain: muscles, discs, ligaments, apophysial (facet) joints. A detailed systematic approach is suggested to facilitate the identification of the particular tissues involved. Various modes of treatment—manipulations, tractions, epidural injections and sclerotherapy—are discussed.

Ouellette, Jean-Paul

1987-01-01

215

Manipulating complex light with metamaterials.  

PubMed

Recent developments in the field of metamaterials have revealed unparalleled opportunities for "engineering" space for light propagation; opening a new paradigm in spin- and quantum-related phenomena in optical physics. Here we show that unique optical properties of metamaterials (MMs) open unlimited prospects to "engineer" light itself. We propose and demonstrate for the first time a novel way of complex light manipulation in few-mode optical fibers using optical MMs. Most importantly, these studies highlight how unique properties of MMs, namely the ability to manipulate both electric and magnetic field components of electromagnetic (EM) waves, open new degrees of freedom in engineering complex polarization states of light at will, while preserving its orbital angular momentum (OAM) state. These results lay the first steps in manipulating complex light in optical fibers, likely providing new opportunities for high capacity communication systems, quantum information, and on-chip signal processing. PMID:24084836

Zeng, Jinwei; Wang, Xi; Sun, Jingbo; Pandey, Apra; Cartwright, Alexander N; Litchinitser, Natalia M

2013-10-02

216

Mapping and Manipulating Facial Expression  

PubMed Central

Non-verbal visual cues accompany speech to supplement the meaning of spoken words, signify emotional state, indicate position in discourse, and provide back-channel feedback. This visual information includes head movements, facial expressions and body gestures. In this paper we describe techniques for manipulating both verbal and non-verbal facial gestures in video sequences of people engaged in conversation. We are developing a system for use in psychological experiments, where the effects of manipulating individual components of non-verbal visual behaviour during live face-to-face conversation can be studied. In particular, the techniques we describe operate in real-time at video frame-rate and the manipulation can be applied so both participants in a conversation are kept blind to the experimental conditions.

Theobald, Barry-John; Matthews, Iain; Mangini, Michael; Spies, Jeffrey R.; Brick, Timothy R.; Cohn, Jeffrey F.; Boker, Steven M.

2009-01-01

217

Manipulating Complex Light with Metamaterials  

PubMed Central

Recent developments in the field of metamaterials have revealed unparalleled opportunities for “engineering” space for light propagation; opening a new paradigm in spin- and quantum-related phenomena in optical physics. Here we show that unique optical properties of metamaterials (MMs) open unlimited prospects to “engineer” light itself. We propose and demonstrate for the first time a novel way of complex light manipulation in few-mode optical fibers using optical MMs. Most importantly, these studies highlight how unique properties of MMs, namely the ability to manipulate both electric and magnetic field components of electromagnetic (EM) waves, open new degrees of freedom in engineering complex polarization states of light at will, while preserving its orbital angular momentum (OAM) state. These results lay the first steps in manipulating complex light in optical fibers, likely providing new opportunities for high capacity communication systems, quantum information, and on-chip signal processing.

Zeng, Jinwei; Wang, Xi; Sun, Jingbo; Pandey, Apra; Cartwright, Alexander N.; Litchinitser, Natalia M.

2013-01-01

218

Understanding pharmaceutical research manipulation in the context of accounting manipulation.  

PubMed

The problem of the manipulation of data that arises when there is both opportunity and incentive to mislead is better accepted and studied - though by no means solved - in financial accounting than in medicine. This article analyzes pharmaceutical company manipulation of medical research as part of a broader problem of corporate manipulation of data in the creation of accounting profits. The article explores how our understanding of accounting fraud and misinformation helps us understand the risk of similar information manipulation in the medical sciences. This understanding provides a framework for considering how best to improve the quality of medical research and analysis in light of the current system of medical information production. I offer three possible responses: (1) use of the Dodd-Frank whistleblower provisions to encourage reporting of medical research fraud; (2) a two-step academic journal review process for clinical trials; and (3) publicly subsidized trial-failure insurance. These would improve the release of negative information about drugs, thereby increasing the reliability of positive information. PMID:24088151

Brown, Abigail

2013-09-01

219

? From Manipulation of Measurements to Manipulation of Perceptions  

Microsoft Academic Search

Computing, in its usual sense, is centered on manipulation of numbers and symbols. In contrast, computing with words, or CW for short, is a methodology in which the objects of computation are words and propositions drawn from a natural language, e.g., small, large, far, heavy, not very likely, the price of gas is low and declining, Berkeley is near San

Lotfi A. Zadeh

220

Initial Reliability of The Standardized Orthopedic Assessment Tool (SOAT)  

PubMed Central

Context: Orthopaedic assessment skills are critical to the success of athletic therapists and trainers. The Standardized Orthopedic Assessment Tool (SOAT) has been content validated. Objective: To establish interrater reliability of the SOAT. Patients or Other Participants: Thirty-two college students, 10 raters, and 2 standardized patients (SPs) from Calgary, Alberta, Canada. Design: Randomized observational study. Intervention(s): Students were allowed 30 minutes to complete a mock orthopaedic assessment of an SP with an injury specific to a region of the body (shoulder, knee, or ankle). Using the region-specific SOAT, raters and SPs evaluated students' orthopaedic assessment skills. Main Outcome Measure(s): The sum totals of the SOAT for 2 raters and 1 SP were used to calculate each student's performance scores for respective scenarios. Scale reliability analysis (Cronbach ?) was completed on the SOAT for each of the 3 body-region examinations. Results: The mean overall reliability of 3 SOATs (ie, ankle, knee, and shoulder) was positive: ? ?=? .85 with the SP scores factored into the equation and ? ?=? .86 without the SP scores factored into the equation. Reliability for the ankle region was highest (? ?=? .91), followed by the knee (? ?=? .83) and the shoulder (? ?=? .82). Conclusions: The study sample size was small, but the results will enable further study with generalization to a broader audience of athletic therapists and athletic trainers. Because a baseline measure of reliability was established using a robust statistical analysis, future researchers can employ more stringent statistical analysis and focus on the effects of various pedagogical techniques to teach and learn the underlying construct of clinical competence in orthopaedic assessment.

Lafave, Mark R; Katz, Larry; Donnon, Tyrone; Butterwick, Dale J

2008-01-01

221

Machining of a bioactive nanocomposite orthopedic fixation device.  

PubMed

Bioactive ceramics bond to bone and enhance bone formation. However, they have poor mechanical properties which restrict their machinability as well as their application as load bearing implants. The goal of this study was to machine bioactive fixation screws using a silica-calcium phosphate nanocomposite (SCPC50). The effect of compact pressure, holding time, and thermal treatment on the microstructure, machinability, and mechanical properties of SCPC50 cylinders were investigated. Samples prepared by powder metallurgy technique at compact pressure range of 100-300 MPa and treated at 900°C/1 h scored a poor machinability rating of (1/5) due to the significant formation of amorphous silicate phase at the grain boundaries. On the other hand, lowering of compact pressure and sintering temperature to 30 MPa/3 h and 700°C/2 h, respectively, minimized the formation of the amorphous phase and raised the machinability rating to (5/5). The modulus of elasticity and ultimate strength of machinable SCPC50 were 10.8 ± 2.0 GPa and 72.8 ± 22.8 MPa, respectively, which are comparable to the corresponding values for adult human cortical bone. qRT-PCR analyses showed that bone cells attached to SCPC50 significantly upregulated osteocalcin mRNA expression as compared to the cells on Ti-6Al-4V. Moreover, cells attached to SCPC50 produced mineralized bone-like tissue within 8 days. On the other hand, cells attached to Ti-6Al-4V failed to produce bone mineral under the same experimental conditions. Results of the study suggest that machinable SCPC50 has the potential to serve as an attractive new material for orthopedic fixation devices. PMID:22692822

Sparnell, Amie; Aniket; El-Ghannam, Ahmed

2012-06-12

222

Corrosion behavior of a welded stainless-steel orthopedic implant.  

PubMed

The corrosion behavior of combinations of materials used in an orthopedic implant: the spherical part (forged or forged and annealed) constituting the head, the weld (tungsten inert gas (TIG) or electron beam (EB) techniques), and the cylindrical part (annealed) constituting the shaft of a femoral prosthesis - has been investigated. Open-circuit potentials, potentiodynamic curves, Tafel slope, mixed potential theory and susceptibility to intergranular attack are electrochemical and chemical procedures selected for this work. Electrochemical measurements using a microelectrode have been made in the following zones: spherical part, cylindrical part, weld, and weld/sphere, and weld/shaft interfaces. To detect intergranular attack, the Strauss test has been used. At the interfaces, corrosion currents, measured (Icorr) and predicted (Icouple) are low, in the order of the pico- to nanoampere. The electrochemical behavior of the electron beam (EB) weld is better than that of the tungsten inert gas (TIG). Welds at interfaces can behave either anodically or cathodically. It is better if welds, which are sensitive parts of the femoral prosthesis, behave cathodically. In this way, the risk of starting localized corrosion (pitting, crevice or intergranular corrosion) from a galvanic couple, remains low. From this point of view, the sample with the EB weld offers the best behavior. All the other samples containing a TIG type of weld exhibit a less favorable behavior. The mechanical treatments (forged, and forged and annealed) of the steel sphere did not show any difference in the corrosion behavior. No intergranular corrosion has been observed at the weld/steel interface for unsensitized samples. With sensitized samples, however, a TIG sample has exhibited some localized intergranular corrosion at a distance of 500 microm along the weld/stainless steel (sphere) interface. PMID:11197502

Reclaru, L; Lerf, R; Eschler, P Y; Meyer, J M

2001-02-01

223

The Management of Patients on Dual Antiplatelet Therapy Undergoing Orthopedic Surgery  

PubMed Central

Cardiovascular disease is prevalent in patients undergoing orthopedic surgery. Many patients who have undergone previous percutaneous coronary intervention (PCI) with stenting are on dual antiplatelet therapy in order to minimize the risk of stent thrombosis. The optimal management of these patients in the perioperative setting remains unclear. We aim to provide information about the management of patients who have undergone a PCI with stents who are subsequently indicated for an orthopedic procedure. We will review the concerns from a cardiologist’s and orthopedic surgeon’s perspective in regards to the management of these patients in the perioperative setting. In addition, the current American Heart Association, American College of Cardiology, Society for Cardiovascular Angiography and Interventions, and American College of Surgeons guidelines are reviewed. The decision to discontinue dual antiplatelet therapy in a patient who has undergone a PCI with stent should be made only after careful review of the risks for thrombosis and bleeding. Best practice suggests that these risks should be jointly assessed by the orthopedic surgeon and cardiologist. Those patients with stents at high risk of thrombosis should have surgery delayed if possible. There is little data supporting a significantly increased bleeding risk associated with mortality in orthopedic patients when antiplatelet therapy is continued perioperatively.

Levin, Lawrence F.

2010-01-01

224

Information Invariants for Distributed Manipulation  

Microsoft Academic Search

In (Donald 1995), we described a manipulation task for coop- erating mobile robots that can push large, heavy objects. There, we asked whether explicit local and global communication between the agents can be removed from a family of pushing protocols. In this article, we answer in the affirmative. We do so by using the general methods of (Donald 1995), analyzing

Bruce Randall Donald; James Jennings; Daniela Rus

1997-01-01

225

Progress in Drosophila genome manipulation  

Microsoft Academic Search

The introduction of cloned and manipulated genetic material into the germline of an experimental organism is one of the most powerful tools of modern biology. In the case of the fruit fly,Drosophila melanogaster, there is also an unparalleled range of sophisticated genetic tools to facilitate subsequent analysis. In consequence,Drosophila remains a most favourable model organism for the dissection of gene

J. W. Sentry; K. Kaiser

1995-01-01

226

Octree Generation, Analysis and Manipulation.  

National Technical Information Service (NTIS)

Octree Encoding is a solid modeling method designed for the high-speed manipulation, analysis and display of arbitrary 3-D objects. The technique is based on a hierarchical 8-ary tree or octree for object representation. Octree Encoding is presented and a...

D. Meagher

1982-01-01

227

Inertia Manipulation through Metric Patching  

Microsoft Academic Search

This paper will present the exact solution for the stress-energy tensor of a spherical matter shell of finite thickness that will patch together different metrics at the boundaries of the shell. The choice of vacuum field solutions for the shell exterior and hollow interior that we make will allow us to manipulate the inertial state of an object within the

David Waite

2001-01-01

228

Manipulation of DNA with Nanotubes  

Microsoft Academic Search

The dip-pen method of manipulating alkane thiols with an Atomic Force Microscope (AFM) tip (Piner et al Science.283, 661 1999) opens the door to the possibility of using minute tools, such as nanotubes, to arrange molecules on a surface. We are interested in this method to fabricate DNA microarrays for applications in DNA computation, genomics, and genetic anlysis. We explore

Susan Gillmor; Katerina Moloni; Max Lagally

2000-01-01

229

Statically balanced direct drive manipulator  

Microsoft Academic Search

A practical architecture, using a four-bar-linkage, is cgnsidered for the University of Minnesota direct drive robot (8). This statically- balanced direct drive robot has been constructed for stability analysis of the robot in constrained manipulation (5 -7). As a result of the elimination of the gravity forces (without any counter weights), smaller actuators and consequently smaller amplifiers were chosen. The

H. Kazerooni; S. Kim

1989-01-01

230

Medication-assisted Spinal Manipulation  

Microsoft Academic Search

Background context: The acceptance of spinal manipulation as a reasonable method of treating certain patients with spinal pain over the past decade has led to a renewed interest and increased use of these techniques performed in conjunction with commonly used medications and procedures. Manual therapy is increasingly being used in conjunction with anesthetics, sedatives or analgesics as well as local,

Frank J Kohlbeck; Scott Haldeman

2002-01-01

231

Data manipulation in heterogeneous databases  

SciTech Connect

Many important information systems applications require access to data stored in multiple heterogeneous databases. This paper examines a problem in inter-database data manipulation within a heterogeneous environment, where conventional techniques are no longer useful. To solve the problem, a broader definition for join operator is proposed. Also, a method to probabilistically estimate the accuracy of the join is discussed.

Chatterjee, A.; Segev, A.

1991-10-01

232

manipulation in isolated turtle cerebellum  

Microsoft Academic Search

The apparent diffusion coefficient (ADC) and relaxation times of water were measured by magnetic resonance imaging (MRI) in the isolated turtle cerebellum during osmotic cell volume manipulation. The aim was to study effects of cell volume changes, a factor in ischaemia and spreading depression, in isolation from considerations of blood flow and metabolism. Cerebella were superfused at 12-14°C with solutions

Jacqueline M. O'Shea; Stephen R. Williams; Nick van Bruggen; Anthony R. Gardner-Medwin

233

COGNITION, ACTION, AND OBJECT MANIPULATION  

PubMed Central

Although psychology is the science of mental life and behavior, it has paid little attention to the means by which mental life is translated into behavior. One domain where links between cognition and action have been explored is the manipulation of objects. This article reviews psychological research on this topic, with special emphasis on the tendency to grasp objects differently depending on what one plans to do with the objects. Such differential grasping has been demonstrated in a wide range of object manipulation tasks, including grasping an object in a way that reveals anticipation of the object's future orientation, height, and required placement precision. Differential grasping has also been demonstrated in a wide range of behaviors, including one-hand grasps, two-hand grasps, walking, and transferring objects from place to place as well as from person to person. The populations in whom the tendency has been shown are also diverse, including nonhuman primates as well as human adults, children, and babies. Meanwhile, the tendency is compromised in a variety of clinical populations and in children of a surprisingly advanced age. Verbal working memory is compromised as well if words are memorized while object manipulation tasks are performed; the recency portion of the serial position curve is reduced in this circumstance. In general, the research reviewed here points to rich connections between cognition and action as revealed through the study of object manipulation. Other implications concern affordances, Donders' Law, and naturalistic observation and the teaching of psychology.

Rosenbaum, David A.; Chapman, Kate M.; Weigelt, Matthias; Weiss, Daniel J.; van der Wel, Robrecht

2012-01-01

234

Genetic manipulation of Mycobacterium abscessus.  

PubMed

This unit covers genetic manipulation protocols for M. abscessus, including nucleic acid extraction (plasmid DNA, genomic DNA, and RNA), transformation, and a recombineering mutagenesis method. M. abscessus is a Biosafety Level 2 (BSL-2) bacterium, and working considerations are also discussed. PMID:20812214

Medjahed, Halima; Singh, Anil Kumar

2010-08-01

235

MODULAR MANIPULATOR FOR ROBOTICS APPLICATIONS  

SciTech Connect

ARM Automation, Inc. is developing a framework of modular actuators that can address the DOE's wide range of robotics needs. The objective of this effort is to demonstrate the effectiveness of this technology by constructing a manipulator from these actuators within a glovebox for Automated Plutonium Processing (APP). At the end of the project, the system of actuators was used to construct several different manipulator configurations, which accommodate common glovebox tasks such as repackaging. The modular nature and quickconnects of this system simplify installation into ''hot'' boxes and any potential modifications or repair therein. This work focused on the development of self-contained robotic actuator modules including the embedded electronic controls for the purpose of building a manipulator system. Both of the actuators developed under this project contain the control electronics, sensors, motor, gear train, wiring, system communications and mechanical interfaces of a complete robotics servo device. Test actuators and accompanying DISC{trademark}s underwent validation testing at The University of Texas at Austin and ARM Automation, Inc. following final design and fabrication. The system also included custom links, an umbilical cord, an open architecture PC-based system controller, and operational software that permitted integration into a completely functional robotic manipulator system. The open architecture on which this system is based avoids proprietary interfaces and communication protocols which only serve to limit the capabilities and flexibility of automation equipment. The system was integrated and tested in the contractor's facility for intended performance and operations. The manipulator was tested using the full-scale equipment and process mock-ups. The project produced a practical and operational system including a quantitative evaluation of its performance and cost.

Joseph W. Geisinger, Ph.D.

2001-07-31

236

Patient Perception of Medicare Reimbursement to Orthopedic Surgeons for THA and TKA.  

PubMed

A survey study was performed of individuals in an orthopedic clinic waiting room regarding their knowledge of Medicare reimbursement to orthopedic surgeons for primary THA and TKA. A total of 1200 surveys were submitted by individuals (median age 64years, 61% female, 50% with Medicare as their primary insurance and 29% having had THA or TKA). The median amount respondents felt that a reasonable fee to the orthopedic surgeon for performing THA or TKA was $5000, while they estimated the Medicare reimbursement to be much less. When asked what was the most they would be willing to pay out-of-pocket to have the surgery performed or for advanced technology related to the procedure, the median was $2000. Most respondents were willing to wait 3-7weeks for surgery to be performed. Participants tended to value THA and TKA more relative to Medicare payments and tended to overestimate Medicare reimbursement to surgeons for THA and TKA. PMID:23891056

Tucker, Joel A; Scott, Carolyn C; Thomas, Colleen S; O'Connor, Mary I

2013-07-25

237

Osteoporosis and orthopedic surgery: effect of bone health on total joint arthroplasty outcome.  

PubMed

Osteoporosis is a common condition. As the population ages, more patients with osteoporosis will require orthopedic procedures, including arthroplasty. Adverse outcomes are more likely for patients with osteoporosis requiring orthopedic procedures, for example those with intraoperative fractures, periprosthetic osteolysis with implant migration, and postoperative periprosthetic fractures. Cemented prosthetic hip replacements may be more successful among patients with poor bone quality. Femoral neck fracture is a concern during hip resurfacing among patients with osteoporosis. Vitamin D deficiency is common among patients undergoing joint arthroplasty and the ideal vitamin D level for joint arthroplasty has yet to be determined. Both bisphosphonates and teriparatide may aide successful osteointegration among patients undergoing noncemented joint arthroplasty. Focusing on bone health perioperatively should result in better outcomes for orthopedic procedures. PMID:24085661

Russell, Linda A

2013-11-01

238

[Acute inpatient conservative multimodal treatment of complex and multifactorial orthopedic diseases in the ANOA concept].  

PubMed

In Germany there is a clear deficit in the non-operative treatment of chronic and complex diseases and pain disorders in acute care hospitals. Only about 20?% of the treatments are carried out in orthopedic hospitals. Hospitals specialized in manual medicine have therefore formed a working group on non-operative orthopedic manual medicine acute care clinics (ANOA). The ANOA has developed a multimodal assessment procedure called the OPS 8-977 which describes the structure and process quality of multimodal and interdisciplinary diagnosis and treatment of the musculoskeletal system. Patients are treated according to clinical pathways oriented on the clinical findings. The increased duration of treatment in the German diagnosis-related groups (DRG) system is compensated for with a supplemental remuneration. Thus, complex and multifactorial orthopedic diseases and pain disorders are conservatively and appropriately treated as inpatient departments of acute care hospitals. PMID:24052170

Psczolla, M

2013-10-01

239

A review of orthopedic injuries in three recent U.S. military conflicts.  

PubMed

We conducted a retrospective review of all patients with orthopedic injuries evacuated to a single medical center to evaluate the treatment and outcome of these injuries in three recent U.S. military conflicts: Operation Urgent Fury (Grenada), Operation Desert Shield/Storm (southwest Asia), and Operation Restore Hope (Somalia). Sixteen orthopedic casualties were originally treated at the medical detachment in Grenada before evacuation to the medical center. Most of these injuries were gunshot wounds to the extremities (11), with three known open fractures. Two patients (three extremities) sustained traumatic amputation (19% amputation rate). One hundred eighty-one patients with orthopedic injuries were medically evacuated from southeast Asia to the medical center for definitive treatment. Of these injuries, there were 143 fractures in 69 patients. One hundred of these fractures were open fractures, and 60% of these injuries were blast injuries. Furthermore, there were 26 amputations (14%). Twenty-two patients with orthopedic injuries were treated in Somalia and evacuated to the medical center. Thirteen of the 22 patients (59%) sustained gunshot wounds, and 2 (9%) sustained blast injuries. There were eight open fractures (36%) and three amputations in two patients (14%). Three of the 22 patients underwent successful limb salvage when ablation was the only other surgical alternative. It appears that a large percentage of medical center evacuations from military conflicts are for orthopedic injuries. Many of these injuries are the result of high-velocity weapons or blast injuries. Regardless of the size and/or purpose of the intervention, similar injury patterns and severity can be expected, because 51% of orthopedic patients had open fractures. Similarly, the rate of amputation associated with extremity trauma has not varied significantly since the Vietnam War. PMID:10870364

Islinger, R B; Kuklo, T R; McHale, K A

2000-06-01

240

Proportionate cancer mortality in methyl methacrylate-exposed orthopedic surgeons compared to general surgeons.  

PubMed

Methyl methacrylate (MMA), a volatile liquid used to make dentures, hearing aids, joint prostheses, and medical adhesives, has been associated with colorectal carcinomas in acrylic sheet manufacturing workers. A case-control proportionate cancer mortality investigation was conducted to determine cancer death differences in orthopedic surgeons performing total joint replacements (TJRs) (MMA-exposed cases) and general surgeons not performing TJRs (unexposed controls). The American Colleges of Orthopedic Surgeons and General Surgeons provided complete demographic information on 468 male orthopedic surgeons and 1,890 male general surgeons who died during 1991-2001. Decedent data was submitted to the National Death Index for matching with underlying causes of death on state death certificates. Proportionate differences in ages at death, deaths from cancer, and deaths from site-specific cancers were analyzed for statistically significant differences by unpaired, two-tailed t tests for continuous variables and by both proportionate cancer mortality ratios and Yates-corrected chi squares for categorical variables. Orthopedic surgeons died of cancer more often (? (2)?=?7.699, P?=?0.006) and at younger (t?=?5.53, P?orthopedic surgeons died of esophageal cancer (? (2)?=?4.372, P?=?0.037) and myeloproliferative malignancies (? (2)?=?4.369, P?=?0.037) more often than general surgeons. Orthopedic surgeons are chronically exposed to MMA and are proportionately more likely to die from cancer, especially esophageal and myeloproliferative cancers, than general surgeons. MMA-exposed healthcare workers may be at increased risks of untimely deaths from site-specific malignancies. PMID:21279556

Diaz, James Henry

2011-06-01

241

Relationship between Postoperative Infectious Complications and Glycemic Control for Diabetic Patients in an Orthopedic Hospital in Kuwait  

Microsoft Academic Search

Objective: To study the relationship between postoperative infectious complications and glycemic control for diabetic patients in an orthopedic hospital in Kuwait. Subjects and Methods: Patients who underwent surgical orthopedic procedures between 2006 and 2007 were identified to provide demographic and clinical informations including age, gender, type of surgery, length of operation, HbA1c values, nature of specimens and species of the

S. M. Lamloum; L. A. Mobasher; A. H. Karar; L. Basiony; T. H. Abdallah; A. I. Al-Saleh; N. A. Al-Shamali

2009-01-01

242

Staphylococcus aureus Vaccine for Orthopedic Patients: An Economic Model and Analysis  

PubMed Central

To evaluate the potential economic value of a Staphylococcus aureus vaccine for pre-operative orthopedic surgery patients, we developed an economic computer simulation model. At MRSA colonization rates as low as 1%, a $50 vaccine was cost-effective [? $50,000 per quality-adjusted life year (QALY) saved] at vaccine efficacy ?30%, and a $100 vaccine at vaccine efficacy ?70%. High MRSA prevalence (?25%) could justify a vaccine price as high as $1,000. Our results suggest that a S. aureus vaccine for the pre-operative orthopedic population would be very cost-effective over a wide range of MRSA prevalence and vaccine efficacies and costs.

Lee, Bruce Y.; Wiringa, Ann E.; Bailey, Rachel R.; Lewis, G. Jonathan; Feura, Jared; Muder, Robert R.

2010-01-01

243

Analysis of Outpatient Trauma Referrals in a Sub-Saharan African Orthopedic Center  

Microsoft Academic Search

Background  The purpose of this study was to characterize the orthopedic trauma workload in the Bedford Orthopaedic Centre (BOC), an orthopedic\\u000a referral hospital in rural South Africa.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  Demographic data, injury data, and information about initial management were collected for two 6-week periods during both\\u000a 2008 and 2009 from patients seen in the BOC outpatient department. Two primary outcomes were evaluated: (1)

Harry Jergesen; David Oloruntoba; Edward Aluede; Monica Grova; Jonathan Phillips; Amber Caldwell

2011-01-01

244

Endovascular Treatment in Emergency Setting of Acute Arterial Injuries After Orthopedic Surgery  

Microsoft Academic Search

Purpose  To assess the feasibility and effectiveness of emergency endovascular treatment of acute arterial injuries after orthopedic\\u000a surgery.\\u000a \\u000a \\u000a \\u000a \\u000a Materials and Methods  Fifteen patients (mean age 68.3 years) with acute arterial injuries after orthopedic surgery were observed, in particular,\\u000a 5 patients with pseudoaneurysm, 9 patients with active bleeding, and 1 patient with arterial dissection. Transarterial embolization\\u000a (TAE) and positioning of covered and noncovered stents

Gianpaolo Carrafiello; Federico Fontana; Monica Mangini; Anna Maria Ierardi; Domenico Laganà; Filippo Piacentino; Francesco Alberto Vizzari; Emanuela Spanò; Carlo Fugazzola

245

Linear Actuator for Rotary Manipulator Motion.  

National Technical Information Service (NTIS)

An improved, pressure tolerant, underwater actuator for rotary motion between two manipulator arm segments is presented which comprises a hydraulic linear actuator fastened to one manipulator arm segment, a ram shaft driven by the linear actuator, a linea...

R. L. Wernli

1983-01-01

246

Improved joint design for conventional industrial manipulators.  

National Technical Information Service (NTIS)

This paper presents a joint sensor and control system design that can significantly enhance the performance of many conventional industrial manipulators. Most industrial robotic manipulators are fairly good positioning mechanisms but experience difficulty...

R. L. Kress J. F. Jansen

1993-01-01

247

Genetic manipulation of Methanosarcina spp.  

PubMed Central

The discovery of the third domain of life, the Archaea, is one of the most exciting findings of the last century. These remarkable prokaryotes are well known for their adaptations to extreme environments; however, Archaea have also conquered moderate environments. Many of the archaeal biochemical processes, such as methane production, are unique in nature and therefore of great scientific interest. Although formerly restricted to biochemical and physiological studies, sophisticated systems for genetic manipulation have been developed during the last two decades for methanogenic archaea, halophilic archaea and thermophilic, sulfur-metabolizing archaea. The availability of these tools has allowed for more complete studies of archaeal physiology and metabolism and most importantly provides the basis for the investigation of gene expression, regulation and function. In this review we provide an overview of methods for genetic manipulation of Methanosarcina spp., a group of methanogenic archaea that are key players in the global carbon cycle and which can be found in a variety of anaerobic environments.

Kohler, Petra R. A.; Metcalf, William W.

2012-01-01

248

Noncontact Acoustic Manipulation in Air  

NASA Astrophysics Data System (ADS)

A noncontact manipulation technique is useful for micromachine technology, biotechnology, and new materials processing. In this paper, we describe an advanced manipulation technique for transporting small objects in air. A standing wave field was generated by two sound beams crossing each other generated by bolted Langevin transducers. Expanded polystyrene particles were trapped at the nodes of the sound pressure in the standing wave field. The position of a trapped particle was shifted by changing the phase difference between the two sound beams. When the trapped particle is transported, it spatially oscillate periodically in a direction perpendicular to that of particle transportation. The numerical calculation of an acoustic field revealed that it is caused by the reflection of an ultrasonic wave at each transducer surface.

Kozuka, Teruyuki; Yasui, Kyuichi; Tuziuti, Toru; Towata, Atsuya; Iida, Yasuo

2007-07-01

249

The Manipulation of Voting Systems  

Microsoft Academic Search

In this paper we consider several ways in which voting systems can be manipulated and we pose some related ethical questions.\\u000a Our focus is on the recent phenomenon of vote trading or vote swapping that was invented in 2000 and used in the 2000 and\\u000a 2004 U.S. Presidential elections. Vote trading is an Internet-based technique that sought to allow Democrats

David Hartvigsen

2008-01-01

250

Singularities of Regional Manipulators Revisited  

Microsoft Academic Search

\\u000a The workspace singularities of 3R regional manipulators have been much analyzed. The presence of cusps in the singularity\\u000a locus is known to admit singularity-avoiding posture change. Cusps arise in singularity theory as second-order phenomena –\\u000a specifically they are ?1,1 Thom– Boardman singularities. The occurrence of such singularities requires that the kinematic mapping be generic (in the\\u000a sense of Pai and

P. Donelan; A. Müller

251

Nanobioscience Based on Nanorobotic Manipulation  

Microsoft Academic Search

\\u000a In this chapter,we present a summary of nanorobotic manipulations under various microscopes and their nanobioscience applications.\\u000a Until now, nanomanipulation is mainly applied to the scientific exploration of mesoscopic phenomena and the construction of\\u000a prototype nanodevices. Recently, the evaluation of bio-samples has gotten much attention for nanobio applications in nano-biotechnology.\\u000a Singlecell analysis gets a lot of attention because of its potential

Toshio Fukuda; Masahiro Nakajima

252

Manipulating the edge of instability  

PubMed Central

We investigate the integration of visual and tactile sensory input for dynamic manipulation. Our experimental data and computational modeling reveal that time-delays are as critical to task-optimal multisensory integration as sensorimotor noise. Our focus is a dynamic manipulation task “at the edge of instability.” Mathematical bifurcation theory predicts that this system will exhibit well-classified low-dimensional dynamics in this regime. The task was using the thumbpad to compress a slender spring prone to buckling as far as possible, just shy of slipping. As expected from bifurcation theory, principal components analysis gives a projection of the data onto a low dimensional subspace that captures 91-97% of its variance. In this subspace, we formulate a low-order model for the brain+hand+spring dynamics based on known mechanical and neurophysiological properties of the system. By systematically occluding vision and anesthetically blocking thumbpad sensation in 12 consenting subjects, we found that vision contributed to dynamic manipulation only when thumbpad sensation was absent. The reduced ability of the model system to compress the spring with absent sensory channels closely resembled the experimental results. Moreover, we found that the model reproduced the contextual usefulness of vision only if we took account of time-delays. Our results shed light on critical features of dynamic manipulation distinct from those of static pinch, as well as the mechanism likely responsible for loss of manual dexterity and increased reliance on vision when age or neuromuscular disease increase noisiness and/or time-delays during sensorimotor integration.

Venkadesan, Madhusudhan; Guckenheimer, John; Valero-Cuevas, Francisco J.

2009-01-01

253

Tactile Sensing for Robotic Manipulation  

Microsoft Academic Search

In several fields of robotics, tactile and force sensors represent a basic tool for achieving an enhanced interaction with\\u000a the environment. As a matter of fact, areas such as advanced manipulation, telemanipulation, haptic devices, legged robots\\u000a and so on are intrinsically based on an advanced sensorial equipment and on proper techniques for the exploitation of their\\u000a information. These types of

Claudio Melchiorri

254

Solid State Nano Gears Manipulations  

NASA Astrophysics Data System (ADS)

The detailed fabrication and manipulations of solid state nano gears up to 350 nm in diameter is reported. Atomic force microscopy (AFM) and ultra high vacuum (UHV) scanning tunneling microscopy (STM) are used to maneuver the gears. The aim is to bridge the gap between the current solid state gears and the now available nanoscale gears. As in many technology integrations, miniaturization is a way to boost efficiency and an opening to new applications.

Troadec, Cedric; Deng, Jie; Ample, Francisco; Thamankar, Ramesh; Joachim, Christian

255

Manipulation of Microobjects by Optical Tweezers  

Microsoft Academic Search

Radiation pressure from a tightly focused laser beam can be used as optical tweezers to confine, position, and transport microparticles.\\u000a Ashkin’s group first demonstrated this technique in 1986 [1]. Optical tweezers provide unique features such as remote manipulation\\u000a of micro\\/nano particles in unique features such as remote manipulation of micro\\/nano particles in liquid, noninvasive manipulation\\u000a of biological samples, precise manipulation

Shoji Maruo

256

Manipulation of Biofilm Microbial Ecology  

SciTech Connect

The biofilm mode of growth provides such significant advantages to the members of the consortium that most organisms in important habitats are found in biofilms. The study of factors that allow manipulation of biofilm microbes in the biofilm growth state requires that reproducible biofilms be generated. The most effective monitoring of biofilm formation, succession and desaturation is with on-line monitoring of microbial biofilms with flowcell for direct observation. The biofilm growth state incorporates a second important factor, the heterogeneity in distribution in time and space of the component members of the biofilm consortium. This heterogeneity is reflected not only in the cellular distribution but in the metabolic activity within a population of cells. Activity and cellular distribution can be mapped in four dimensions with confocal microscopy, and function can be ascertained by genetically manipulated reporter functions for specific genes or by vital stains. The methodology for understanding the microbial ecology of biofilms is now much more readily available and the capacity to manipulate biofilms is becoming an important feature of biotechnology.

White, D.C.; Palmer, R.J., Jr.; Zinn, M.; Smith, C.A.; Burkhalter, R.; Macnaughton, S.J.; Whitaker, K.W.; Kirkegaard, R.D.

1998-08-15

257

Optimization of Contactless Planar Actuator With Manipulator  

Microsoft Academic Search

This paper describes the optimization of a contactless electromagnetic planar actuator (6 degree-of-freedom) with manipulator on top of the floating platform. The manipulator causes disturbance forces and torques that must be counteracted by the magnetic bearings. In addition, the energy necessary to operate the manipulator is transferred by means of an inductive coupling, which is integrated in the magnetic bearings.

Jeroen de Boeij; Elena A. Lomonova; AndrÉ J. A. Vandenput

2008-01-01

258

Utilizing Mathematic Manipulatives in the Elementary Classroom  

Microsoft Academic Search

This self-study was designed to investigate the impact of using mathematic manipulatives on elementary students' learning of expected math skills, specifically at the fourth grade level. This inquiry included the implementation of both concrete and virtual manipulatives. In order to determine how to utilize manipulatives in math to support and foster student attention, comprehension, and retention, this inquiry focused on

Hoekstra Carlie; Leavitt

2011-01-01

259

Manipulation of Metals Futures: Lessons from Sumitomo  

Microsoft Academic Search

The Sumitomo Corporation manipulated the London Metal Exchange (LME) copper price, which forms the pricing basis for the world copper market, from at least 1991 until earlier this year. This manipulation has concentrated attention on the functioning and governance of London futures markets, and in particular of the LME. This paper argues that futures market manipulation is not illegal under

Christopher L Gilbert

1997-01-01

260

Low Overhead Manipulation of Bound Book Pages  

Microsoft Academic Search

The robotic manipulation of flexible materials such as paper remains a challenging area of research. Our recent work has focused on the nondestructive manipulation of bound paper as found in books. This article describes a new approach to the one-sided, nonprehensile paper manipulation problem in which we use the polymer Polydimethylsiloxane (PDMS) to create a mechanical bond between the paper

Josh Young; Illah R. Nourbakhsh

2004-01-01

261

Soft Motion Trajectory for Planar Redundant Manipulator  

Microsoft Academic Search

Trajectory planning of redundant manipulator is a very active area since many tasks are requiring special characteristics to be satisfied. The importance of redundant manipulators has been increased for the last two decades because of the possibility to avoid singularities as well as obstacles within the course of motion. A soft motion planning for redundant planar manipulators is introduced in

Atef A. Ata; Mohamed Y. Sa'adah

2006-01-01

262

Revisiting Haptic Issues for Virtual Manipulation  

Microsoft Academic Search

In efforts to develop interaction techniques for virtual environments which are extremely flexible and versatile, manipulation in virtual reality has focused heavily on visual feedback techniques (such as highlighting objects when the selection cursor passes through them) and generic input devices (such as the glove). Such virtual manipulations lack many qualities of physical manipulation of objects in the real world

Dennis Proffitt; Ken Hinckley; Matt Conway; Neal F. Kassell; Randy Pausch; Richard Stoakley

1996-01-01

263

Droplet Manipulation With Light on Optoelectrowetting Device  

Microsoft Academic Search

We have demonstrated a 2D droplet manipulation platform allowing fully optical manipulation of droplets on a photosensitive surface. Optically controlled injection, transport, separation, and multiple droplet manipulation have been achieved for nanoliter-size droplets. These functions are realized by sandwiching the droplets between two optoelectrowetting (OEW) surfaces. Optical illumination on OEW surfaces changes the surface wettability locally through the electrowetting mechanism.

Pei-Yu Chiou; Zehao Chang; Ming C. Wu

2008-01-01

264

On the dynamics of manipulators in space using the virtual manipulator approach  

Microsoft Academic Search

Robotic manipulators carried by future spacecraft are expected to perform important tasks in space, like servicing satellites. Such applications will encounter problems due to the dynamic coupling between the manipulator and the spacecraft. A Virtual Manipulator (VM) concept has been developed recently for the modelling of manipulators working in space. This paper shows that the VM facilitates planning and control

Z. Vafa; S. Dubowsky

1987-01-01

265

A hybrid nanorobotic manipulation system integrated with nanorobotic manipulators inside scanning and transmission electron microscopes  

Microsoft Academic Search

A hybrid nanorobotic manipulation system, which is integrated with a nanorobotic manipulator inside a transmission electron microscope (TEM) and nanorobotic manipulators inside a scanning electron microscope (SEM), is presented. The TEM nanomanipulator has been constructed with 4 multi-layer piezoelectric devices for driving in 3 translational degrees of freedoms (DOFs) and a passive 3-DOF sample stage driven by SEM nanorobotic manipulators.

Masahiro Nakajima; Fumihito Arai; Lixin Dong; Toshio Fukuda

2004-01-01

266

Selective laser sintering of calcium phosphate materials for orthopedic implants  

NASA Astrophysics Data System (ADS)

Two technologies, Solid Freeform Fabrication (SFF) and bioceramics are combined in this work to prepare bone replacement implants with complex geometry. SFF has emerged as a crucial technique for rapid prototyping in the last decade. Selective Laser Sintering (SLS) is one of the established SFF manufacturing processes that can build three-dimensional objects directly from computer models without part-specific tooling or human intervention. Meanwhile, there have been great efforts to develop implantable materials that can assist in regeneration of bone defects and injuries. However, little attention has been focused in shaping bones from these materials. The main thrust of this research was to develop a process that can combine those two separate efforts. The specific objective of this research is to develop a process that can construct bone replacement material of complex geometry from synthetic calcium phosphate materials by using the SLS process. The achievement of this goal can have a significant impact on the quality of health care in the sense that complete custom-fit bone and tooth structures suitable for implantation can be prepared within 24--48 hours of receipt of geometric information obtained either from patient Computed Tomographic (CT) data, from Computer Aided Design (CAD) software or from other imaging systems such as Magnetic Resonance Imaging (MRI) and Holographic Laser Range Imaging (HLRI). In this research, two different processes have been developed. First is the SLS fabrication of porous bone implants. In this effort, systematic procedures have been established and calcium phosphate implants were successfully fabricated from various sources of geometric information. These efforts include material selection and preparation, SLS process parameter optimization, and development of post-processing techniques within the 48-hour time frame. Post-processing allows accurate control of geometry and of the chemistry of calcium phosphate, as well as control of micro and macro pore structure, to maximize bone healing and provide sufficient mechanical strength. It also permits the complete removal of the polymeric binders that are resided in the SLS process. In collaboration with the University of Texas Health Science Center at San Antonio and BioMedical Enterprises, Inc., porous implants based on anatomical geometry have been successfully implanted in rabbits and dogs. These histologic animal studies reveal excellent biocompatibility and show its great potential for commercial custom-fit implant manufacture. The second research effort involves fabrication of fully dense bone for application in dental restoration and load-bearing orthopedic functions. Calcium phosphate glass melts, proven to be biocompatible in the first effort, were cast into carbon molds. Processes were developed for preparing the molds. These carbon molds of anatomic shape can be prepared from either Computer Numerical Control (CNC) milling of slab stock or SLS processing of thermoset-coated graphite powder. The CNC milling method provides accurate dimension of the molds in a short period of time, however, the capable geometries are limited; generally two pieces of molds are required for complex shapes. The SLS method provides very complex shape green molds. However, they need to go through pyrolysis of thermoset binder to provide the high temperature capability reached at calcium phosphate melt temperatures (1100°C) and noticeable shrinkage was observed during pyrolysis. The cast glass was annealed to develop polycrystalline calcium phosphate. This process also exhibits great potential.

Lee, Goonhee

267

Orthopedic trauma-induced pulmonary injury in the obese Zucker rats  

PubMed Central

Objective Obese subjects with orthopedic trauma exhibit increased inflammation and an increased risk of pulmonary edema. PGE2 production is elevated during inflammation and associated with increased vascular permeability. We hypothesize that pulmonary edema in obesity following orthopedic trauma is due to elevated PGE2 and resultant increases in pulmonary permeability. Methods Orthopedic trauma was induced in both hindlimbs in lean (LZ) and obese Zucker rats (OZ). On the following day, plasma IL-6 and PGE2 levels, pulmonary edema, and pulmonary gas exchange capability were compared between groups: LZ, OZ, LZ with trauma (LZT), and OZ with trauma (OZT). Vascular permeability in isolated lungs was measured in LZ and OZ before and after application of PGE2. Results As compared with the other groups, the OZT exhibited elevated plasma IL-6 and PGE2 levels, increased lung wet/dry weight ratio and bronchoalveolar protein concentration, and an impaired pulmonary gas exchange. Indomethacin treatment normalized plasma PGE2 levels and pulmonary edema. Basal pulmonary permeability in isolated lungs was higher in OZ than LZ, with a further increase in permeability following treatment with PGE2. Conclusions These results suggest that pulmonary edema in OZ following orthopedic trauma is due to an elevated PGE2 and resultant increases in pulmonary permeability.

Xiang, Lusha; Hester, Robert L.; Fuller, William L; Sebai, Mohamad E; Mittwede, Peter N; Jones, Elizabeth K; Aneja, Arun; Russell, George V

2010-01-01

268

Chronic Pain-Assessment of Orthopedic Physical Therapists' Knowledge and Attitudes  

Microsoft Academic Search

Orthopedic physical therapists' knowledge of pain mechanisms and methods of pain management and their attitudes toward working with patients with benign chronic pain were studied. A random sample of 500 members of the American Physical Theram Association's Section on Orlhopaedics received by mail a %-item

Melissa S Wolff; Theresa Hoskins Mlchel; David E Krebs; Nancy T Watts

269

Computer-assisted total hip arthroplasty: coding the next generation of navigation systems for orthopedic surgery.  

PubMed

This article outlines the scientific basis and a state-of-the-art application of computer-assisted orthopedic surgery in total hip arthroplasty (THA) and provides a future perspective on this technology. Computer-assisted orthopedic surgery in primary THA has the potential to couple 3D simulations with real-time evaluations of surgical performance, which has brought these developments from the research laboratory all the way to clinical use. Nonimage- or imageless-based navigation systems without the need for additional pre- or intra-operative image acquisition have stood the test to significantly reduce the variability in positioning the acetabular component and have shown precise measurement of leg length and offset changes during THA. More recently, computer-assisted orthopedic surgery systems have opened a new frontier for accurate surgical practice in minimally invasive, tissue-preserving THA. The future generation of imageless navigation systems will switch from simple measurement tasks to real navigation tools. These software algorithms will consider the cup and stem as components of a coupled biomechanical system, navigating the orthopedic surgeon to find an optimized complementary component orientation rather than target values intraoperatively, and are expected to have a high impact on clinical practice and postoperative functionality in modern THA. PMID:19751123

Renkawitz, Tobias; Tingart, Markus; Grifka, Joachim; Sendtner, Ernst; Kalteis, Thomas

2009-09-01

270

Orthodontic and orthopedic effects of Activator, Activator-HG combination, and Bass appliances: A comparative study  

Microsoft Academic Search

The orthodontic and orthopedic effects of the Activator, Activator-Headgear Combination (ACHG) and the Bass appliance systems were compared by analyzing the cephalometric records of 64 subjects, who were treated for skeletal Class II malocclusion, with both conventional and Pancherz's methods. Differences between observations on the different occasions (starting and ending values) were tested with Wilcoxon's matched pairs rank test. Kruskal-Wallis

Nil Cura; Müyesser Saraç; Yildiz Öztürk; Nazan Sürmeli

1996-01-01

271

The Effectiveness of Active and Traditional Teaching Techniques in the Orthopedic Assessment Laboratory  

ERIC Educational Resources Information Center

|Active learning is a teaching methodology with a focus on student-centered learning that engages students in the educational process. This study implemented active learning techniques in an orthopedic assessment laboratory, and the effects of these teaching techniques. Mean scores from written exams, practical exams, and final course evaluations…

Nottingham, Sara; Verscheure, Susan

2010-01-01

272

Orthopedic Surgery in Rural American Hospitals: A Survey of Rural Hospital Administrators  

ERIC Educational Resources Information Center

|Rural American residents prefer to receive their medical care locally. Lack of specific medical services in the local community necessitates travel to a larger center which is less favorable. This study was done to identify how rural hospitals choose to provide orthopedic surgical services to their communities. Methods: All hospitals in 5 states…

Weichel, Derek

2012-01-01

273

Implantable 9Channel Telemetry System for In Vivo Load Measurements With Orthopedic Implants  

Microsoft Academic Search

Knowledge of the loads to which orthopedic implants are subjected is a fundamental prerequisite for their optimal biomechanical design, long-term success, and improved rehabilitation outcomes. In vivo load measurements are more accurate than those obtained using mathematical musculoskeletal models. An inductively powered integrated circuit inside the implant measures six load components as well as the temperature and supplied voltage. This

Friedmar Graichen; Rüdiger Arnold; Antonius Rohlmann; Georg Bergmann

2007-01-01

274

A novel modeling framework for multilayered soft tissue deformation in virtual orthopedic surgery.  

PubMed

Realistic modeling of soft tissue deformation is crucial to virtual orthopedic surgery, especially orthopedic trauma surgery which involves layered heterogeneous soft tissues. In this paper, a novel modeling framework for multilayered soft tissue deformation is proposed in order to facilitate the development of orthopedic surgery simulators. We construct our deformable model according to the layered structure of real human organs, and this results in a multilayered model. The division of layers is based on the segmented Chinese Visible Human (CVH) dataset. This enhances the realism and accuracy in the simulation. For the sake of efficiency, we employ 3D mass-spring system to our multilayered model. The nonlinear passive biomechanical properties of skin and skeletal muscle are achieved by introducing a bilinear elasticity scheme to the springs in the mass-spring system. To efficiently and accurately reproduce the biomechanical properties of certain human tissues, an optimization approach is employed in configuring the parameters of the springs. Experimental data from biomechanics literatures are used as benchmarking references. With the employment of Physics Processing Unit (PPU) and high quality volume visualization, our framework is developed into an interactive and intuitive platform for virtual surgery training systems. Several experiments demonstrate the feasibility of the proposed framework in providing interactive and realistic deformation for orthopedic surgery simulation. PMID:20503610

Qin, Jing; Pang, Wai-Man; Chui, Yim-Pan; Wong, Tien-Tsin; Heng, Pheng-Ann

2010-06-01

275

Shape-from-Shading under Near Point Lighting and Partial views for Orthopedic Endoscopy  

Microsoft Academic Search

Bone reconstruction using endoscopy is important for computer aided minimally invasive orthopedic surgery. During surgery an endoscope consisting of a camera and one or more light sources is inserted through a small inci- sion into the body and the acquired images are analyzed. Since bone surface is featureless, shading is the primary cue for shape perception. However, due to the

Chenyu Wu; Srinivasa G. Narasimhan; Branislav Jaramaz

276

A Prototype Robotic Arm for Use by Severely Orthopedically Handicapped Students. Final Report.  

ERIC Educational Resources Information Center

This 18-month pilot project, which ran from October 1, 1987 to March 31, 1989, developed a prototype robotic arm for educational use by students with severe orthopedic disabilities in the Columbus (Ohio) Public Schools. The developmental effort was intended first, to provide direct access to currently available instructional materials and, second,…

Howell, Richard

277

Enhanced osteoblast adhesion on nanostructured selenium compacts for anti-cancer orthopedic applications  

PubMed Central

Metallic bone implants possess numerous problems limiting their long-term efficacy, such as poor prolonged osseointegration, stress shielding, and corrosion under in vivo environments. Such problems are compounded for bone cancer patients since numerous patients receive orthopedic implants after cancerous bone resection. Unfortunately, current orthopedic materials were not originally developed to simultaneously increase healthy bone growth (as in traditional orthopedic implant applications) while inhibiting cancerous bone growth. The long-term objective of the present research is to investigate the use of nano-rough selenium to prevent bone cancer from re-occurring while promoting healthy bone growth for this select group of cancer patients. Selenium is a well known anti-cancer chemical. However, what is not known is how healthy bone cells interact with selenium. To determine this, selenium, spherical or semispherical shots, were pressed into cylindrical compacts and these compacts were then etched using 1N NaOH to obtain various surface structures ranging from the micron, submicron to nano scales. Changes in surface chemistry were also analyzed. Through these etching techniques, results of this study showed that biologically inspired surface roughness values were created on selenium compacts to match that of natural bone roughness. Moreover, results showed that healthy bone cell adhesion increased with greater nanometer selenium roughness (more closely matching that of titanium). In this manner, this study suggests that nano-rough selenium should be further tested for orthopedic applications involving bone cancer treatment.

Tran, Phong; Webster, Thomas J

2008-01-01

278

Reliability of videotaped observational gait analysis in patients with orthopedic impairments  

Microsoft Academic Search

BACKGROUND: In clinical practice, visual gait observation is often used to determine gait disorders and to evaluate treatment. Several reliability studies on observational gait analysis have been described in the literature and generally showed moderate reliability. However, patients with orthopedic disorders have received little attention. The objective of this study is to determine the reliability levels of visual observation of

Jaap J Brunnekreef; Caro JT van Uden; Steven van Moorsel; Jan GM Kooloos

2005-01-01

279

Increased osteoblast cell density on nanostructured PLGA-coated nanostructured titanium for orthopedic applications  

PubMed Central

There are more than 30,000 orthopedic implant revision surgeries necessary each year in part due to poor implant fixation with juxtaposed bone. A further emphasis on the current problems associated with insufficient bone implant performance is the fact that many patients are receiving hip implants earlier in life, remaining active older, and that the human lifespan is continuously increasing. Collectively, it is clear that there is a strong clinical need to improve implant performance through proper, prolonged fixation. For these reasons, the objective of the present in vitro study was to improve the performance of titanium (Ti), one of the most popular orthopedic implant materials. Accordingly, the proliferative response of osteoblasts (bone-forming cells) on novel nanostructured Ti/PLGA (poly-lactic-co-glycolic acid) composites was examined. This study showed that nano-topography can be easily applied to Ti (through anodization) and porous PLGA (through NaOH chemical etching) to enhance osteoblast cell proliferation which may lead to better orthopedic implant performance. This straight forward application of nano-topography on current bone implant materials represents a new direction in the design of enhanced biomaterials for the orthopedic industry.

Smith, Lester J; Swaim, John S; Yao, Chang; Haberstroh, Karen M; Nauman, Eric A; Webster, Thomas J

2007-01-01

280

Building Orthopedic Journal Collections: Analyzing Use and Bibliometrics in a Teaching Hospital Library  

Microsoft Academic Search

This article presents a collection development tool that identifies a list of key orthopedic journals to retain in print or license electronically in an academic or teaching hospital library. The authors developed an assessment tool comparing five measures of importance and use, including journal impact factor, cited half-life, interlibrary loan lending, electronic archival access, and library usage. This study assists

Tania P. Bardyn; Taryn Resnick; Ross Mazo; Kenneth A. Egol

2009-01-01

281

Accurate and early diagnosis of orthopedic device-related infection by microbial heat production and sonication.  

PubMed

Proper and rapid diagnosis of orthopedic device-related infection is important for successful treatment. Sonication has been shown to improve the diagnostic performance. We hypothesized that the combination of sonication with a novel method called microcalorimetry will further improve and accelerate the diagnosis of implant infection. We prospectively included 39 consecutive patients (mean age 59 years, 62% males) at our institution from whom 29 orthopedic prostheses and 10 osteosynthesis material were explanted. The explanted device was sonicated. The resulting sonication fluid was analyzed using microcalorimetry. Using standardized criteria to define orthopedic device-related infection, 12 cases (31%) were defined as infected. In all, positive periprosthetic tissue cultures were found. The sensitivity and specificity of microcalorimetry of sonication fluid were 100% and 97%, respectively. Mean time to detection, defined as time to reach a rising heat flow signal of 20?µW measured after equilibiration needed to get accurate measurement, was 10.9?h. In summary, microcalorimetry of sonication fluid is a reliable and a fast method in detecting the presence of microorganisms in orthopedic device-related infection. © 2013 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 31:1700-1703, 2013. PMID:23813873

Borens, Olivier; Yusuf, Erlangga; Steinrücken, Julia; Trampuz, Andrej

2013-06-29

282

Thou shalt not fall! Decreasing falls in the postoperative orthopedic patient with a femoral nerve block.  

PubMed

A Transforming Care at the Bedside model was used to decrease falls in the femoral nerve block (FNB) patient population on a 32-bed orthopedic/neurologic unit in a community hospital setting. A multifaceted, strategic practice and educational bundle was implemented, resulting in a 75% decrease in falls among patients with FNB. PMID:24147322

Foisy, Kimberly

283

The impact of a hospitalist on role boundaries in an orthopedic environment  

PubMed Central

Purpose Hospitalists specialize in the management of hospitalized patients. They work with several health care professionals to provide patient care. There has been little research examining the perceived impact of the hospitalist’s role on staff working in an orthopedic environment. This study examined the experiences of staff across several professional backgrounds in working with a hospitalist in an orthopedic environment. Participants and methods A qualitative descriptive approach was taken to investigate the experience of staff working with a hospitalist at a specialized orthopedic hospital. Purposive sampling was used to recruit interview participants including nurses, internists, pharmacists, physiotherapists, anesthetists, senior administration, and orthopedic surgeons to the point of theoretical saturation, which occurred after 12 interviews. Interviews were coded, and these codes were combined into categories and predominant themes were identified. Findings Overall, staff believed that the hospitalist role was a positive addition to the facility. The role benefitted patients and supported the clinical well-being and education of staff. Many staff felt the hospitalist had no impact on their workload, but others reported that their work had decreased or increased. Several described the potential for role overlap between the hospitalist and other physicians. Conclusion The importance of interprofessional collaboration in the implementation of the hospitalist role was a recurring theme in our analysis. This study demonstrates the importance of educating staff about the hospitalist role boundaries prior to implementing hospitalist care.

Webster, Fiona; Bremner, Samantha; Jackson, Megan; Bansal, Vikas; Sale, Joanna

2012-01-01

284

Institution of the Steiros Algorithm® Outpatient Surgical Protocol Reduced Orthopedic Surgical Site Infections (SSI) Rates  

PubMed Central

Background Control of surgical site infections (SSI) is imperative for the safety of our patients. As orthopedic surgeons we strive to have the lowest infection rate possible for all our surgical procedures. this study evaluates the effects of a simple outpatient peri-operative patient cleaning protocol (The Steiros Algorithm® Outpatient Surgery Protocol) on SSI rates. Methods We retrospectively reviewed the hospital's infection rate database for all procedures from July 2005 until February 2011 performed by one general orthopedic surgeon (PAW) within one hospital system. The Steiros Algorithm® Outpatient Surgery Protocol was instituted on January 1st, 2009. We calculated and compared the deep and superficial SSI rate for orthopedic surgeries performed before and after the Outpatient Protocol was instituted. All patients had a minimum of one-year follow-up data. Lowest previously published estimated costs for SSI were used for a cost analysis ($17,708). Results The July 1st, 2005 through December 31st, 2008 SSI rate was 1.0% (13/1292). From January 1st, 2009 through February 28th, 2011 the SSI rate was zero (0/875). the SSI rates decreased 100%. Due to the reduction in SSI, the hospital saved a minimum of $154,059 over a two year period. Conclusions In this retrospective review, the Steiros Algorithm® Outpatient Surgery Protocol dramatically reduced the overall SSI rate to zero and saved money. We believe this is a simple, effective protocol that can be used for all orthopedic surgical procedures.

Watson, Paul A.; Watson, Luke; Torress-Cook, Alfonso

2012-01-01

285

Positive identification of a burned body using an implanted orthopedic plate.  

PubMed

Human identification is usually obtained by comparing fingerprints, antemortem and postmortem radiographs, dental records and also by DNA profiling. Sometimes forensic investigators come across some medical appliances such as orthopedic devices. These medical devices may be useful to achieve positive human identification. This paper aims to present a positive identification of a burned human body by tracking batch numbers engraved in an implanted orthopedic device found in the decedent's left ulna bone. The examiners also collected and analyzed other valuable hints related to the case. Forensic examination can provide reliable positive human identification, even if few, but precise information can be obtained from antemortem and postmortem records. The present report illustrates a set of valuable techniques and how identifying numbers in orthopedic devices are helpful to determine positive human identification in cases of carbonization. As seen in this case, the forensic experts used low-cost identification procedures with accurate results, avoiding DNA profiling method that would be of higher cost and time consuming. Considering social and legal aspects, it is quite important that physicians and dentists understand that correct and accurate records of surgeries they perform, such as fixation of orthopedic devices and dental implants, are utterly relevant and helpful in cases of human identification. PMID:23642727

Matoso, Rodrigo Ivo; Benedicto, Eduardo de Novaes; de Lima, Silas Henrique Rabelo; Prado, Felippe Bevilacqua; Daruge, Eduardo; Daruge Júnior, Eduardo

2013-05-01

286

Implant vendors and hospitals: Competing influences over product choice by orthopedic surgeons  

Microsoft Academic Search

Background: Vendors of hip and knee implants court orthopedic surgeons to adopt their products. Hospitals, which have to pay for these products, now court the same surgeons to help reduce the number of vendors and contain implant costs. Purposes: This study measures the surgeon's perceived alignment of interests with both vendors and hospitals and gauges surgeons' exposure and receptivity to

Lawton R. Burns; Michael G. Housman; Robert E. Booth; Jr Aaron Koenig

2009-01-01

287

Seasonal variation in orthopedic health services utilization in Switzerland: The impact of winter sport tourism  

Microsoft Academic Search

BACKGROUND: Climate- or holiday-related seasonality in hospital admission rates is well known for many diseases. However, little research has addressed the impact of tourism on seasonality in admission rates. We therefore investigated the influence of tourism on emergency admission rates in Switzerland, where winter and summer leisure sport activities in large mountain regions can generate orthopedic injuries. METHODS: Using small

Klazien Matter-Walstra; Marcel Widmer; André Busato

2006-01-01

288

The significance of infection related to orthopedic devices and issues of antibiotic resistance  

Microsoft Academic Search

Over the last 15 years, with the advent of modern standards in the control of sterility within the operating room environment and adequate protocols of peri-operative antibiotic prophylaxis, the incidence of infections associated to orthopedic implants has become very low. Nevertheless, the event of infection still represents one of the most serious and devastating complications which may involve prosthetic devices.

Davide Campoccia; Lucio Montanaro; Carla Renata Arciola

2006-01-01

289

Involvement of presurgical pain in preemptive analgesia for orthopedic surgery: a randomized double blind study  

Microsoft Academic Search

Preemptive analgesia (PA) is effective in animal models but its clinical effectiveness remains controversial. We examined the effect of preexisting pain on PA. Subjects were recruited from patients needing orthopedic surgery. Some had presurgical pain (fracture surgery and arthritic surgery), while others had no presurgical pain (removal surgery for a tumor, nail or plate). Epidural morphine or a saline control

Sumihisa Aida; Hideyoshi Fujihara; Kiichiro Taga; Satoru Fukuda; Koki Shimoji

2000-01-01

290

Robust registration for computer-integrated orthopedic surgery: Laboratory validation and clinical experience  

Microsoft Academic Search

In order to provide navigational guidance during computer-integrated orthopedic surgery, the anatomy of the patient must first be registered to a medical image or model. A common registration approach is to digitize points from the surface of a bone and then find the rigid transformation that best matches the points to the model by constrained optimization. Many optimization criteria, including

B. Ma; R. E. Ellis

2003-01-01

291

Spotlights: A Robust Method for Surface-Based Registration in Orthopedic Surgery  

Microsoft Academic Search

Fast, simple and effective registration methods are needed in a wide variety of computer-assisted surgical procedures in which readily locatable anatomical landmarks are not available. Orthopedic procedures about the knee, in particular, are adversely aff ected if the registration accuracy exceeds about 1 mm in translation or about in rotation, and the proximal tibia and distal femur are typi -

Burton Ma; Randy E. Ellis; David J. Fleet

1999-01-01

292

Perioperative complications in corrective facial orthopedic surgery: A 5-year retrospective study  

Microsoft Academic Search

Purpose: Frequency and severity of complications have a profound impact on referral patterns for facial orthopedic surgery. Therefore, a retrospective study was undertaken to determine the incidence of such problems in a large series of patients, with the intent to use these data to make possible changes in the perioperative protocol used in our clinic. Patients and Methods: The files

Faustino Acebal-Bianco; Philippe L. P. J. Vuylsteke; Maurice Y. Mommaerts; Calix A. S. De Clercq

2000-01-01

293

Behavioral strategies for the reduction of pain and anxiety associated with orthopedic trauma  

Microsoft Academic Search

This study examined the efficacy of behavioral strategies in alleviating pain and anxiety associated with severe orthopedic trauma. Sixty-four patients with multiple fractures were divided into four groups: (1) control, (2) attention only, (3) EMG biofeedback-assisted relaxation, and (4) audiotaped relaxation training. All were measured over at least six sessions, or as long as hospital stay permitted. Significant between group

Jeanne Achterberg; Cornelia Kenner; David Casey

1989-01-01

294

A Review of the Design Process for Implantable Orthopedic Medical Devices  

PubMed Central

The design process for medical devices is highly regulated to ensure the safety of patients. This paper will present a review of the design process for implantable orthopedic medical devices. It will cover the main stages of feasibility, design reviews, design, design verification, manufacture, design validation, design transfer and design changes.

Aitchison, G.A; Hukins, D.W.L; Parry, J.J; Shepherd, D.E.T; Trotman, S.G

2009-01-01

295

ANODIZED LAYERS ON TITANIUM AND TITANIUM ALLOY ORTHOPEDIC MATERIALS FOR ANTIMICROBIAL ACTIVITY APPLICATIONS  

Microsoft Academic Search

The development of a post operative infection following the implantation of a foreign material, such as a total joint prosthesis, is one of the most feared complications in orthopedic surgery. Prevention of such bacterial infections is best accomplished through the delivery of antibiotics as close to the implant as possible. A novel method has been developed to attach, retain and

D. S. Dunn; S. Raghavan; R. G. Volz

1992-01-01

296

Computer architecture using self-manipulating trees  

US Patent & Trademark Office Database

A computer architecture operates a computer using self-manipulating trees. A source is input and is matched to a self-manipulating tree using open-ended inviting to match identities to portions of the source. After activating the root node of the self-manipulating tree, the self-manipulating tree self-manipulates according to the instructions for self-manipulating contained in the identities pointed to by the nodes of the self-manipulating tree. The invention may be used as a natural language search engine for electronic data bases, a natural language programming language, a parser-free computer operating system, a computer problem solving system, and as an enhancement feature for general purpose computers and general purpose computer applications, such as a translator and a help engine.

Spooner; Christopher (Washington, DC); Spooner; Richard (Washington, DC)

2001-07-03

297

Presurgical orthopedics has no effect on archform in unilateral cleft lip and palate.  

PubMed

Objective : Evaluation of the effect of presurgical orthopedics on maxillary archform up to 6 months of age. Design : Retrospective, single-blinded, case-control study. Participants : Study model sets of 75 infants with consecutive, nonsyndromic, complete unilateral cleft lip and palate (excluding Simonart bands) from 1995 to 2005. Interventions : All patients (PSO group, n ?=? 14; non-PSO group, n ?=? 61) received lip repair/vomer flap at 3 months and soft palate repair at 6 months by the same consultant surgeon. The two groups were comparable at birth (p > .01) in all archform variables. Main Outcome Measures : Sixteen variables were computed, following single-blinded analysis using the Reflex Microscope to describe the archform in the transverse, anteroposterior, and vertical dimensions and the arch circumference. Data were analyzed using a repeated-measures hierarchical analysis of variance with a significance level of 1%. Results : Repeatability studies showed good measurement precision. Presurgical orthopedics produced no statistically significant mean change in any archform variable when compared with the non-PSO group. The difference in the mean reduction in the alveolar cleft width between the groups was 0.69 mm (95% confidence interval, -0.89 to 2.28 mm, p ?=? .52). Lip repair produced greater change in archform than did presurgical orthopedics, reducing the mean alveolar cleft width by 4.45 mm (95% confidence interval, 3.53 to 5.37 mm; p < .001). Conclusions : There was no evidence that presurgical orthopedics produced any significant effect on archform, raising questions for its continued use in this context. Lip repair had a greater impact on arch dimensions than did presurgical orthopedics. PMID:21823827

Adali, Nazan; Mars, Michael; Petrie, Aviva; Noar, Joe; Sommerlad, Brian

2011-08-08

298

Use of Portable Ultrasound Machine for Outpatient Orthopedic Diagnosis: An Implementation Study  

PubMed Central

Introduction: Ultrasonography and magnetic resonance imaging (MRI) are used to evaluate shoulder disorders. This implementation study investigated outpatient ultrasonography at an orthopedic practice in a managed care setting. Methods: A portable ultrasound machine was introduced at an orthopedic clinic in a group practice. An orthopedic surgeon who primarily treated shoulder disorders received 15 hours of training. The impact of physician-performed ultrasonography on subsequent MRI and other outcomes of patients with shoulder disorders from January 2011 through October 2011 was determined using automated administrative and clinical data. Comparisons were made to patients who did not undergo ultrasonography at the experimental practice and 2 orthopedic clinics in the same practice. Results: During the study, 146 ultrasound examinations were administered. Compared with patients who did not undergo ultrasonography, patients who received ultrasonography had significantly higher comorbidity. However, they were significantly less likely to have MRI (9.7% with ultrasonography vs 14.4% without; p = 0.03) although equally likely to undergo surgery (33.6% with ultrasonography vs 22.1% without, p = 0.77). Mean time to surgery was 89.3 ± 49.3 days for patients with ultrasonography vs 32.9 ± 43.3 days for patients without (p < 0.05). No ultrasonography-examined patients had an incorrect diagnosis at surgery. For patients receiving ultrasonography, an estimated 35 MRIs were avoided, saving a predicted $17,603, a 50% return in less than 1 year on a $34,897 investment for an ultrasound machine and supplies. Conclusion: Outpatient ultrasonography by an orthopedic surgeon can be useful for diagnosing shoulder disorders and might reduce MRI utilization.

Adelman, Sean; Fishman, Paul

2013-01-01

299

Metasurfaces for manipulating surface plasmons  

NASA Astrophysics Data System (ADS)

Metasurfaces have recently emerged as an innovative approach to control light propagation with unprecedented capabilities. Different from previous work concentrating on steering far-field propagating waves, here we demonstrate that metallic metasurfaces can efficiently and effectively manipulate surface plasmons in the near-field regime. By engineering the dispersion of surface plasmons on a simple grating structure, we are able to realize normal, non-divergent as well as anomalous diffraction of surface plasmons. In particular, all-angle and broadband negative refraction of surface plasmons is achieved, largely attributed to the uniquely designed hyperbolic constant frequency contour of surface plasmons propagating along the metasurface.

Liu, Yongmin; Zhang, Xiang

2013-09-01

300

Manipulating expression of tonoplast transporters.  

PubMed

Plant vacuoles have multifaceted roles including turgor maintenance, cytosolic pH and ionic homeostasis, plant protection against environmental stress, detoxification, pigmentation, and cellular signaling. These roles are achieved through the coordinated activities of many proteins in the tonoplast (vacuolar membrane), of which the proton pumps and ion transporters have been modified for improved abiotic stress tolerance in transgenic plants. Here we describe a method to manipulate vacuolar H(+)-pyrophosphatase in turfgrass and evaluate the impact of the modified tonoplast on the phenotype, biochemistry, and physiology of the transgenics. Creeping bentgrass (Agrostis stolonifera L.) plants overexpressing an Arabidopsis vacuolar H(+)-pyrophosphatase AVP1 exhibited improved growth and enhanced salt tolerance, likely associated with increased photosynthesis, relative water content, proline production, and Na(+) uptake. These transgenic plants also had decreased solute leakage in the leaf tissues and increased concentrations of Na(+), K(+), Cl(-), and total phosphorus in the root tissues. Similar strategies can be employed to manipulate other tonoplast transporters and in other plant species to produce transgenic plants with improved performance under various abiotic stresses. PMID:22895772

Li, Zhigang; Zhou, Man; Hu, Qian; Reighard, Shane; Yuan, Shuangrong; Yuan, Ning; San, Bekir; Li, Dayong; Jia, Haiyan; Luo, Hong

2012-01-01

301

Semantics of directly manipulating spatializations.  

PubMed

When high-dimensional data is visualized in a 2D plane by using parametric projection algorithms, users may wish to manipulate the layout of the data points to better reflect their domain knowledge or to explore alternative structures. However, few users are well-versed in the algorithms behind the visualizations, making parameter tweaking more of a guessing game than a series of decisive interactions. Translating user interactions into algorithmic input is a key component of Visual to Parametric Interaction (V2PI) [13]. Instead of adjusting parameters, users directly move data points on the screen, which then updates the underlying statistical model. However, we have found that some data points that are not moved by the user are just as important in the interactions as the data points that are moved. Users frequently move some data points with respect to some other 'unmoved' data points that they consider as spatially contextual. However, in current V2PI interactions, these points are not explicitly identified when directly manipulating the moved points. We design a richer set of interactions that makes this context more explicit, and a new algorithm and sophisticated weighting scheme that incorporates the importance of these unmoved data points into V2PI. PMID:24051771

Hu, Xinran; Bradel, Lauren; Maiti, Dipayan; House, Leanna; North, Chris; Leman, Scotland

2013-12-01

302

Virtual Manipulative Materials in Secondary Mathematics: A Theoretical Discussion  

Microsoft Academic Search

With the increased use of computer manipulatives in teaching there is need for theoretical discussions on the role of manipulatives. This paper reviews theoretical rationales for using manipulatives and illustrates how earlier distinctions of manipulative materials are broadened to include new forms of materials such as virtual manipulatives. Manipulatives are in a broader network of learning tools. Applying a theoretical

Immacukate K. Namukasa; Darren Stanley; Martin Tuchtie

2009-01-01

303

Cerebrospinal fluid leak secondary to chiropractic manipulation  

PubMed Central

Background: There is a paucity of quality data on the incidence of adverse outcomes of chiropractic manipulation. Spontaneous intracranial hypotension (SIH) subsequent to cervical spinal manipulation has been documented. However, no imaging correlates have previously been presented demonstrating a clear causal relationship to manipulation with follow-up and correlating with clinical symptomatology. Case Description: We present a case of subacute cervical cerebrospinal fluid (CSF) leak resulting from chiropractic manipulation of the cervical spine. The patient is a 29-year-old female who received manipulation one week prior to developing symptoms of severe orthostatic headache, nausea, and vomiting. Magnetic resonance imaging (MRI) revealed a new C5-C6 ventral CSF collection. Symptomatic onset corresponded with the recent cervical chiropractic adjustment. We present serial imaging correlating with her symptomatology and review the pertinent literature on complications of chiropractic manipulation. Conclusion: Our case of ventral CSF leak with symptoms of intracranial hypotension demonstrated spontaneous symptomatic resolution without permanent neurological sequelae.

Kusnezov, Nicholas A.; Velani, Shamsha A.; Lu, Daniel C.

2013-01-01

304

Optimizing single DNA molecules manipulation by AFM.  

PubMed

Recent progress in single DNA manipulation with atomic force microscope has proved its potential in analysing genetic information at the molecular level instead of macro ensemble approach. However, current manipulation of DNA is mainly carried out by manual operations, which is labour-intensive and time-consuming, thus limits the further applications in other fields. In this paper, an optimized DNA manipulation method is successfully established. An image correlation technique is introduced to realize automatic thermal drift compensation. Combined with elaborately designed tip movement control for different manipulation purposes, accurate and efficient DNA manipulations such as dissection, folding and picking are realized. The efficiency has been improved for an order of magnitude compare to manual manipulations, whereas the performance is demonstrated to be the same. This newly developed method has shed light on high-efficiency nanomanipulation of small molecules with complex structures, and thus provides the possibility of deeply understanding the intrinsic properties of single biomolecules. PMID:21534953

Long, F; Wang, C; Lü, M; Zhang, F; Sun, J; Hu, J

2011-04-28

305

Improved joint design for conventional industrial manipulators  

SciTech Connect

This paper presents a joint sensor and control system design that can significantly enhance the performance of many conventional industrial manipulators. Most industrial robotic manipulators are fairly good positioning mechanisms but experience difficulty (i.e., become unstable) when making contact with objects (especially objects having different stiffnesses). The primary problem is due to large frictional forces present in the drive trains of the manipulators that cause large contact forces to be created during impact These forces could potentially damage either the object or the manipulator or both. This paper examines how to make a robotic manipulator more backdrivable (i.e., reduce the apparent friction in the drive trains) using a relatively inexpensive modification. The potential payoff is a manipulator that could easily make contact with a diverse range of objects such as very fragile objects made of glass to very stiff objects made of steel without changing the end effector tooling.

Kress, R.L.; Jansen, J.F.

1993-06-01

306

Improved joint design for conventional industrial manipulators  

SciTech Connect

This paper presents a joint sensor and control system design that can significantly enhance the performance of many conventional industrial manipulators. Most industrial robotic manipulators are fairly good positioning mechanisms but experience difficulty (i.e., become unstable) when making contact with objects (especially objects having different stiffnesses). The primary problem is due to large frictional forces present in the drive trains of the manipulators that cause large contact forces to be created during impact These forces could potentially damage either the object or the manipulator or both. This paper examines how to make a robotic manipulator more backdrivable (i.e., reduce the apparent friction in the drive trains) using a relatively inexpensive modification. The potential payoff is a manipulator that could easily make contact with a diverse range of objects such as very fragile objects made of glass to very stiff objects made of steel without changing the end effector tooling.

Kress, R.L.; Jansen, J.F.

1993-01-01

307

Multibeam laser manipulation and fixation of microparticles  

NASA Astrophysics Data System (ADS)

A multibeam laser trapping-reaction system was developed to demonstrate independent manipulation of plural microparticles as well as to induce photochemical reaction in a laser-trapped particle(s). Photopolymerization of vinyl monomers dissolved in a sample solution was employed to fix polystyrene latex particles regularly aligned by laser trapping. Integrated latex structures created by the successive manipulation/polymerization procedures were also shown to be freely manipulated by laser beams.

Misawa, Hiroaki; Sasaki, Keiji; Koshioka, Masanori; Kitamura, Noboru; Masuhara, Hiroshi

1992-01-01

308

Quality assurance monitoring of osteopathic manipulative treatment.  

PubMed

The quality assurance review program of military medicine has implications for civilian osteopathic medicine. Clinical monitors need to be developed that are based on the principles of osteopathy. Components of a quality assurance screening checklist for osteopathic manipulative treatment include credentials of the osteopathic physician, the diagnosis, either somatic dysfunction or other condition, the type of osteopathic manipulative treatment applied, and specific contraindications. A checklist applicable to osteopathic manipulative treatment that could be used by military and civilian sectors is suggested. PMID:2354964

Koss, R W

1990-05-01

309

Laser manipulation of atomic and molecular flows  

Microsoft Academic Search

The continuing advance of laser technology enables a range of broadly applicable, laser-based flow manipulation techniques. The characteristics of these laser-based flow manipulations suggest that they may augment, or be superior to, such traditional electro-mechanical methods as ionic flow control, shock tubes, and small scale wind tunnels. In this study, methodology was developed for investigating laser flow manipulation techniques, and

Taylor C. Lilly

2010-01-01

310

Advance Data from Vital and Health Statistics: Number 302. Office Visits to Orthopedic Surgeons, United States, 1995-96.  

National Technical Information Service (NTIS)

This report describes the utilization of ambulatory medical care services as provided by nonfederally employed, office-based orthopedic surgeons during the period 1995-96. Statistics are presented on selected physician, patient, and visit characteristics....

S. M. Shappert

1999-01-01

311

Culture and Manipulation of Embryonic Cells  

PubMed Central

The direct manipulation of embryonic cells is an important tool for addressing key questions in cell and developmental biology. C. elegans is relatively unique among genetic model systems in being amenable to manipulation of embryonic cells. Embryonic cell manipulation has allowed the identification of cell interactions by direct means, and it has been an important technique for dissecting mechanisms by which cell fates are specified, cell divisions are oriented, and morphogenesis is accomplished. Here, we present detailed methods for isolating, manipulating and culturing embryonic cells of C. elegans.

Edgar, Lois G.; Goldstein, Bob

2012-01-01

312

Orthopedics surgery trainer with PPU-accelerated blood and tissue simulation.  

PubMed

This paper presents a novel orthopedics surgery training system with both the components for modeling as well as simulating the deformation and visualization in an efficient way. By employing techniques such as optimization, segmentation and center line extraction, the modeling of deformable model can be completed with minimal manual involvement. The novel trainer can simulate rigid body, soft tissue and blood with state-of-the-art techniques, so that convincing deformation and realistic bleeding can be achieved. More important, newly released Physics Processing Unit (PPU) is adopted to tackle the high requirement for physics related computations. Experiment shows that the acceleration gain from PPU is significant for maintaining interactive frame rate under a complex surgical environments of orthopedics surgery. PMID:18044647

Pang, Wai-Man; Qin, Jing; Chui, Yim-Pan; Wong, Tien-Tsin; Leung, Kwok-Sui; Heng, Pheng-Ann

2007-01-01

313

Surgical site infection in patients submitted to orthopedic surgery: the NNIS risk index and risk prediction.  

PubMed

The applicability of the risk index for surgical site infection of the National Nosocomial Infection Surveillance (NNIS) has been evaluated for its performance in different surgeries. In some procedures, it is necessary to include other variables to predict. Objective: to evaluate the applicability of the NNIS index for prediction of surgical site infection in orthopedic surgeries and to propose an alternative index. The study involved a historical cohort of 8236 patients who had been submitted to orthopaedic surgery. Statistical analysis was performed using multivariate logistic regression to fit the model. The incidence of infection was 1.41%. Prediction models were evaluated and compared to the NNIS index. The proposed model was not considered a good predictor of infection, despite moderately stratified orthopedic surgical patients in at least three of the four scores. The alternative model scored higher than the NNIS models in the prediction of infection. PMID:21584372

Ercole, Flávia Falci; Chianca, Tânia Couto Machado; Duarte, Denise; Starling, Carlos Ernesto Ferreira; Carneiro, Mariângela

314

[Nursing diagnoses in patients admitted by the orthopedic clinic in a surgical unit].  

PubMed

Descriptive and exploratory study conducted in a hospital school in Londrina, Paraná, with the objective of identifying the frequency of the main nursing diagnoses according to the North American Nursing Diagnoses Association in male patients admitted at an orthopedic ward. The sample consisted of 60 patients with an average age of 40.6 years. Data was collected through interview and physical examination. The diagnoses were interpreted based on defining characteristics, risk factors and situations. The average number of nursing diagnoses by patient was 11.5. The most frequent diagnoses were: Risk of infection, Skin integrity, Tissue integrity, Severe pain, Self-care deficit relating to bathing and basic hygiene, Impaired physical mobility, Lack of knowledge, Risk of peripheral neurovascular dysfunction. This study identified patients' needs of care and it helped to establish the relevance of different clinical focuses for orthopedic nursing. PMID:19320343

da Silva, Fernando Salomão; Viana, Marina Fernandes; Volpato, Márcia Paschoalina

2008-12-01

315

Efficacy of CT scanning in a group of 174 patients with orthopedic and musculoskeletal problems  

SciTech Connect

One hundred and seventy-four patients with orthopedic and musculoskeletal problems received computed tomography (CT) scans between January 1979 and July 1980. There were 34 trauma patients, 35 patients with known or suspected primary tumors, 20 patients with metastases, 18 patients with suspected spinal stenosis, 25 patients with disc problems, five patients with infections, 13 children with congenital anomalies, and 24 patients with miscellaneous problems. The CT scans proved useful in all the pediatric cases, 97% of the trauma patients, and in the majority of patients with tumors. It appears that absolute indications for CT scanning in orthopedic patients include acute trauma to the spine, pelvis, hip, and shoulder girdles as well as in children with congenital spinal anomalies. Relative indications include determining the extent of the tumor and also aiding in the correct approach for biopsying a lesion.

Griffiths, H.J.; Hamlin, D.J.; Kiss, S.; Lovelock, J.

1981-11-01

316

[Thoughts and proposals for quality assurance in orthopedics in the community pharmacy].  

PubMed

This review begins with an examination of the notion of quality in the industrial setting, its definition and the steps taken to achieve quality assurance. The review then considers what is meant by quality in the field of health, and in particular for orthopedic devices dispensed in a community pharmacy. Special attention is given to dispensing standard orthopedic devices; five aspects are considered: organization, personal competence, products, services, and relationship with the patient. The first aspect, organization, involves the selling area, stocks, different sizes and sale prices, and the introduction of new devices. Dispensing involves, reception and physical examination of the patient, information delivery, decision-making on the choice of an orthesis, measurement, trial and application, as well as complementary advice and completion of the patient's file. Quality is measured in terms of patient needs. PMID:17489074

Callanquin, J; Labrude, P; Rouyer, A

2007-05-01

317

Incidence and costs of defensive medicine among orthopedic surgeons in the United States: a national survey study.  

PubMed

Defensive medicine is defined as medical practices that may exonerate physicians from liability without significant benefit to patients. No study has evaluated the United States national incidence of defensive medicine in the field of orthopedic surgery. In the study reported here, we investigated the practice of defensive medicine and the resultant financial implications of such behavior by orthopedic surgeons in the US. A Web-based survey was sent to 2000 orthopedic surgeons in the US. Of the 1214 respondents, 1168 (96%) reported having practiced defensive medicine by ordering imaging, laboratory tests, specialist referrals, or hospital admissions mainly to avoid possible malpractice liability. On average, 24% of all ordered tests were for defensive reasons. Mean national Medicare payment information was used to calculate the cost of defensive medicine per respondent: approximately $100,000 per year. With there being 20,400 practicing orthopedic surgeons in the US, we estimated that the national cost of defensive medicine for the specialty of orthopedic surgery is $2 billion annually. Orthopedic surgeons' defensive medicine is a significant factor in health care costs and is of marginal benefit to patients. Policies aimed at managing liability risk may be useful in containing such practices. PMID:22482090

Sethi, Manish K; Obremskey, William T; Natividad, Hazel; Mir, Hassan R; Jahangir, A Alex

2012-02-01

318

Medical hypnosis and orthopedic hand surgery: Pain perception, post-operative recovery, and adherence  

Microsoft Academic Search

Orthopedic hand-surgery patients experience severe pain post-operatively, yet they must engage in painful exercises and wound-care shortly after surgery; poor involvement results in complications that may lead to loss of function and\\/or disfigurement. This study tested a cognitive-behavioral intervention including relaxation, imagery, and therapeutic suggestions (hypnosis) designed to reduce pain perception, enhance post-surgical recovery, and facilitate rehabilitation.Sixty hand-surgery patients at

Magaly Hettinga Mauer

1994-01-01

319

Severe head injury combined with orthopedic and vascular trauma of the limbs  

Microsoft Academic Search

From 1982 to 1992, 2766 brain injury patients were admitted to the University Hospital San Cecilio of Granada, Spain. In\\u000a 873 cases head injury was concomitant with other injuries but the association of severe head injury and combined orthopedic\\u000a and vascular trauma of the limbs was observed only in 23 cases (incidence 2%). Thirteen patients were scheduled for revascularization,\\u000a and

R. Vara-Thorbeck; M. Ruiz-Morales

1998-01-01

320

Rehabilitation of orthopedic and rheumatologic disorders. 4. Rheumatoid arthritis and calcium pyrophosphate deposition disease  

Microsoft Academic Search

Shih VC, Kamen LB, Kaplan RJ, Stitik TP, Bitar AA, Vo AN. Rehabilitation of orthopedic and rheumatologic disorders. 4. Rheumatoid arthritis and calcium pyrophosphate deposition disease.This self-directed learning module highlights a clinical vignette of 2 patients: (1) a woman with bilateral, distal, upper-limb pain assessed by differential diagnosis, laboratory work-up, and treatment of rheumatologic disorders frequently seen in the physiatric

Vivian C. Shih; Leonard B. Kamen; Robert J. Kaplan; Todd P. Stitik; Ali A. Bitar; Andrew N. Vo

2005-01-01

321

Inkjet printed antibiotic- and calcium-eluting bioresorbable nanocomposite micropatterns for orthopedic implants  

Microsoft Academic Search

Inkjet printing of antibiotic- and calcium-eluting micropatterns was explored as a novel means of preventing the formation of biofilm colonies and facilitating osteogenic cell development on orthopedic implant surfaces. The micropatterns consisted of a periodic array of ?50?m circular dots separated by ?150?m. The composition of the micropatterns was controlled by formulating inks with rifampicin (RFP) and poly(d,l-lactic–co-glycolic) acid (PLGA)

Yexin Gu; Xuening Chen; Joung-Hyun Lee; David A. Monteiro; Hongjun Wang; Woo Y. Lee

322

Improved corrosion resistance of plasma carbon coated NiTi orthopedic materials  

Microsoft Academic Search

Summary form only given. Nickel titanium (NiTi) alloys are useful in orthopedic applications because of their super-elastic properties and shape memory effects. However, when NiTi is used for a prolonged period of time, harmful Ni ions can leach out into the surrounding body fluid inside a human body, and so it is important to design a method to impede the

R. W. Y. Poon; X. Y. Liu; C. Y. Chung; P. K. Chu; K. W. K. Yeung; W. W. Lu; K. M. C. Cheung

2004-01-01

323

The Management of Patients on Dual Antiplatelet Therapy Undergoing Orthopedic Surgery  

Microsoft Academic Search

Cardiovascular disease is prevalent in patients undergoing orthopedic surgery. Many patients who have undergone previous percutaneous\\u000a coronary intervention (PCI) with stenting are on dual antiplatelet therapy in order to minimize the risk of stent thrombosis.\\u000a The optimal management of these patients in the perioperative setting remains unclear. We aim to provide information about\\u000a the management of patients who have undergone

Han Jo Kim; Lawrence F. Levin

2010-01-01

324

Trends in orthopedics: an analysis of Medicare claims, 2000-2010.  

PubMed

The complete Medicare Part B claims databases for the years 2000 through 2010 were queried. Musculoskeletal procedures were grouped into 12 anatomical or functional groups for multiyear analysis. Utilization rates per 1000 Medicare beneficiaries and spending per Medicare beneficiary were calculated. Compound annual growth rates were used to compare spending trends with national health care spending data. Medicare payments for orthopedic procedures increased 63.7% in 10 years, from $1.6 billion in 2000 to $2.6 billion in 2010. The number of procedures increased by a similar proportion, from 8.2 to 13.6 million (66.9%); the average reimbursement per procedure decreased slightly. The overall utilization rate increased by 41.4% over the past decade, from 206.73 to 292.41 per 1000 beneficiaries. Considerable variation was found when these procedures were analyzed, with utilization rates per 1000 beneficiaries ranging from large increases (spine, +214.5%; endoscopy, +128%) to modest decreases (hand and fingers, -9.9%). Payment trends, corrected for inflation and growth in the number of Medicare enrollees, showed similar heterogeneity. Payment per beneficiary increased at only 0.65% above inflation for orthopedic procedures, well below the 4.67% compound annual growth rate seen for overall Medicare spending.These data demonstrate that, despite significant increases in its utilization, orthopedics does not appear to be a driver for increases in Medicare spending over the past decade. Only spinal and endoscopic procedures stand out as having experienced exceptional growth; demonstration of clinical success and cost effectiveness in these areas would be helpful to strengthen support for these evolving trends in orthopedic practice. PMID:23464959

Belatti, Daniel A; Phisitkul, Phinit

2013-03-01

325

Orthopedics Surgery Trainer with PPU-Accelerated Blood and Tissue Simulation  

Microsoft Academic Search

This paper presents a novel orthopedics surgery training system with both the components for modeling as well as simulating\\u000a the deformation and visualization in an efficient way. By employing techniques such as optimization, segmentation and center\\u000a line extraction, the modeling of deformable model can be completed with minimal manual involvement. The novel trainer can\\u000a simulate rigid body, soft tissue and

Wai-man Pang; Jing Qin; Yim-pan Chui; Tien-tsin Wong; Kwok-sui Leung; Pheng-ann Heng

2007-01-01

326

Brandon Research, Inc. Orthopedic Implant Cooperative Research and Development Agreement (CRADA) Final Report  

SciTech Connect

The project was a joint research effort between the U. S. Department of Energy's (DOE) Kansas City Plant (KCP) and Brandon Research, Inc. to develop ways to improve implants used for orthopedic surgery for joint replacement. The primary product produced by this study is design information, which may be used to develop implants that will improve long-term fixation and durability in the host bone environment.

Freeman, W.R.

1999-04-22

327

Orthopedic wear debris mediated inflammatory osteolysis is mediated in part by NALP3 inflammasome activation.  

PubMed

Activation of myeloid cells by orthopedic particulate debris is a key event in the pathogenesis of periprosthetic osteolysis and implant loosening after total joint replacement (TJR). Several lines of evidence implicate NACHT, LRR, and PYD domains-containing protein 3 (NALP3) inflammasome-mediated production of interleukin 1 beta (IL-1?) in the pathogenesis of clinical disorders ascribable to foreign particulate materials, including asbestos, silica, and urate crystals. Recent reports indicate that orthopedic polymer products and metallic particulates and ions may activate the same pathway. Here, we investigated the contribution of the NALP3 inflammasome to the pathogenesis of peri-implant osteolysis. Pharmaceutical and genetic perturbations of caspase-1 and inflammasome components were used to assess the role of the NALP3 inflammasome in IL-1? production and osteoclast formation by human monocytes and mouse macrophages in response to polymethylmethacrylate (PMMA) particle phagocytosis. The role of caspase-1 in a mouse calvarial model of particle-mediated osteolysis was assessed using µCT. Phagocytosis of PMMA particles induces caspase-1 dependent release of IL-1? from human monocytes and mouse macrophages. Importantly, using macrophages from mice deficient in components of the NALP3 inflammasome, we show PMMA-induced IL-1? production is strictly dependent on these components. Mice lacking caspase-1, the sole effector of the NALP3 inflammasome, show reduced orthopedic wear particle-induced calvarial osteolysis compared to wild-type controls. Absence of NALP3 inflammasome components fails to alter osteoclast formation in vitro. Our findings identify the NALP3 inflammasome as a critical mediator of orthopedic wear-induced osteolysis and as a viable therapeutic target for the treatment of periprosthetic osteolysis. PMID:22933241

Burton, Lyndsey; Paget, Daniel; Binder, Nikolaus B; Bohnert, Krista; Nestor, Bryan J; Sculco, Thomas P; Santambrogio, Laura; Ross, F Patrick; Goldring, Steven R; Purdue, P Edward

2012-08-29

328

Risk factors for treatment failure in orthopedic device-related methicillin-resistant Staphylococcus aureus infection  

Microsoft Academic Search

The purpose of this study was to determine the clinical and microbiological risk factors for treatment failure of methicillin-resistant\\u000a Staphylococcus aureus (MRSA) orthopedic device-related infection (ODRI). A retrospective cohort study of patients with MRSA ODRI who were treated\\u000a at Geneva University Hospitals between 2000 and 2008 was undertaken. Stored MRSA isolates were retrieved for genetic characterization\\u000a and determination of the

T. Ferry; I. Uçkay; P. Vaudaux; P. François; J. Schrenzel; S. Harbarth; F. Laurent; L. Bernard; F. Vandenesch; J. Etienne; P. Hoffmeyer; D. Lew

2010-01-01

329

Orthopedic surgery-related benign uptake on FDG-PET: case examples and pitfalls  

Microsoft Academic Search

Orthopedic surgical procedures often create some special postoperative complications, which may demonstrate abnormally increased\\u000a or focal uptake for an extended period of time on FDG PET-CT images. The distinction of normal from pathologic, benign from\\u000a malignant uptake is very important to minimize the number of false positive results. To date, very little data have been published\\u000a regarding surgical-related benign musculoskeletal

Yiyan Liu

2009-01-01

330

Flucloxacillin compared with cefazolin in short-term prophylaxis for clean orthopedic surgery  

Microsoft Academic Search

Two-hundred and fifty-two patients were included in a prospective, randomized, double-blind trial comparing the efficacy of flucloxacillin with that of cefazolin for clean orthopedic surgery. The preventive antibiotic regimen consisted of three 1-g injections perioperatively. There were 126 patients in each group, and the follow-up period was at least 6 months. Two deep (1.6%) and five superficial (4.0%) infections occurred

J. Van Meirhaeghe; R. Verdonk; G. Verschraegen; P. Myny; G. Paeme; H. Claessens

1989-01-01

331

Contact-Free Magnetoelastic Smart Microsensors With Stochastic Noise Filtering for Diagnosing Orthopedic Implant Failures  

Microsoft Academic Search

A novel contact-free magnetoelastic microsensor for diagnosing failing orthopedic implants is introduced. It uses an implant-embedded 30-mum-thick MetGlas-2826 film and a sensing coil placed 30 mm away from the film. Implant loading generates thin-film magnetoelastic response, passively (contact-free) detected as voltage by the coil. A specific integrated stochastic nonlinear filter performs data denoising, and a decision-making module concludes (via data

Dionysios E. Mouzakis; Dimitrios Dimogianopoulos; Dimitrios Giannikas

2009-01-01

332

Antifibrinolytic Therapy and Perioperative Blood Loss in Cancer Patients Undergoing Major Orthopedic Surgery  

Microsoft Academic Search

Background: Aprotinin has been reported to reduce blood loss and transfusion requirements in patients having major orthopedic operations. Data on whether ? amino-caproic acid (EACA) is effective in this population are sparse. Methods: Sixty-nine adults with malignancy scheduled for either pelvic, extremity or spine surgery during general anesthesia entered this randomized, double-blind, placebo-controlled trial, and received either intravenous aprotinin (n

David Amar; Florence M. Grant; Hao Zhang; Patrick J. Boland; Denis H Y Leung; John A. Healey

2003-01-01

333

[Progress on study of clinical application of xinhuang tablet on orthopedic diseases].  

PubMed

By retrieval of medical periodicals published in the recent 23 years, 155 papers concerning Xinhuang Tablet were searched, among them 28 were dealing with its clinical application in orthopedics disease, involving gouty arthritis, soft tissue injury, osteoarthritis, ankylosing spondylosis, rheumatoid arthritis, etc. Besides the traditional oral administration mode, Xinhuang Tablet may be used externally for local absorption through transcutaneous manner by mixing with some adjuvant as honey, vinegar, wine, and egg white. PMID:18822923

Chen, Shao-dong

2008-07-01

334

On the Dynamics of Space Manipulators Using the Virtual Manipulator, with Applications to Path Planning  

Microsoft Academic Search

\\u000a Robotic manipulators carried by future spacecraft are expected to perform important tasks in space, such as the servicing\\u000a of satellites. However, the performance of these systems could be severely degraded by dynamic disturbances to the spacecraft\\u000a caused by manipulator motions. This paper presents a method for representing the dynamics of space manipulator systems using\\u000a the recently developed Virtual Manipulator (VM)

Z. Vafa; S. Dubowsky

335

The omni-relevance of surgery: how medical specialization shapes orthopedic surgeons' treatment recommendations.  

PubMed

This article examines treatment recommendations in orthopedic surgery consultations and shows how surgery is treated as "omni-relevant" within this activity, providing a context within which the broad range of treatment recommendations proposed by surgeons is offered. Using conversation analysis to analyse audiotaped encounters between orthopedic surgeons and patients, we highlight how surgeons treat surgery as having a special, privileged status relative to other treatment options by (1) invoking surgery (whether or not it is actually being recommended) and (2) presenting surgery as the "last best resort" (in relation to which other treatment options are calibrated, described and considered). This privileged status surfaces in the design and delivery of recommendations as a clear asymmetry: Recommendations for surgery are proposed early, in relatively simple and unmitigated form. In contrast, recommendations not for surgery tend to be delayed and involve significantly more interactional work in their delivery. Possible implications of these findings, including how surgeons' structuring of recommendations may shape patient expectations (whether for surgery or some alternative), and potentially influence the distribution of orthopedic surgery procedures arising from these consultations, are considered. PMID:22889378

Hudak, Pamela L; Clark, Shannon J; Raymond, Geoffrey

2012-08-13

336

Endovascular Treatment in Emergency Setting of Acute Arterial Injuries After Orthopedic Surgery  

SciTech Connect

Purpose: To assess the feasibility and effectiveness of emergency endovascular treatment of acute arterial injuries after orthopedic surgery. Materials and Methods: Fifteen patients (mean age 68.3 years) with acute arterial injuries after orthopedic surgery were observed, in particular, 5 patients with pseudoaneurysm, 9 patients with active bleeding, and 1 patient with arterial dissection. Transarterial embolization (TAE) and positioning of covered and noncovered stents were the treatments performed. Follow-up after stent implantation (mean 36 months) was performed with color Doppler US (CDU) at 1, 3, 6, and 12 months and yearly thereafter. Plain X-ray was performed to evidence dislodgment or fracture of the graft. A minimum of 12 months' follow-up is available after TAE. Results: Immediate technical success was obtained in all cases. No major complications occurred. Overall clinical success rate was 100%. During mean follow-up, stent-graft occlusions did not occurred. No recurrence and/or consequence of TAE was registered during a minimum follow-up of 12 months. Conclusions: Percutaneous treatment is a feasible and safe tool for treating arterial injuries because it can provide fast and definitive resolution of the damage. This low-invasiveness approach can be proposed as first-line treatment in patients with acute injuries after orthopedic surgery.

Carrafiello, Gianpaolo, E-mail: gcarraf@tin.it; Fontana, Federico, E-mail: fede.fontana@libero.it; Mangini, Monica, E-mail: monica.mangini@tin.it; Ierardi, Anna Maria, E-mail: amierardi@yahoo.it; Lagana, Domenico; Piacentino, Filippo, E-mail: f.piacentino@live.it; Vizzari, Francesco Alberto, E-mail: gcarraf@tin.it; Spano, Emanuela, E-mail: gcarraf@tin.it; Fugazzola, Carlo, E-mail: carlo.fugazzola@ospedale.varese.it [Insubria University, Interventional Radiology, Department of Radiology (Italy)

2012-06-15

337

A touch probe method of operating an implantable RFID tag for orthopedic implant identification.  

PubMed

The major problem in operating an implantable radio-frequency identification (RFID) tag embedded on an orthopedic implant is low efficiency because of metallic interference. To improve the efficiency, this paper proposes a method of operating an implantable passive RFID tag using a touch probe at 13.56 MHz. This technology relies on the electric field interaction between two pairs of electrodes, one being a part of the touch probe placed on the surface of tissue and the other being a part of the tag installed under the tissue. Compared with using a conventional RFID antenna such as a loop antenna, this method has a better performance in the near field operation range to reduce interference with the orthopedic implant. Properly matching the touch probe and the tag to the tissue and the implant reduces signal attenuation and increases the overall system efficiency. The experiments have shown that this method has a great performance in the near field transcutaneous operation and can be used for orthopedic implant identification. PMID:23853323

Liu, Xiaoyu; Berger, J Lee; Ogirala, Ajay; Mickle, Marlin H

2013-06-01

338

Surgeons save bones: an algorithm for orthopedic surgeons managing secondary fracture prevention.  

PubMed

Postmenopausal osteoporosis has a big impact on health care budget worldwide, which are expected to double by 2050. In spite of severe medical and socioeconomic consequences from fragility fractures, there are insufficient efforts in optimizing osteoporotic treatment and prevention. Undertreatment of osteoporosis is a well known phenomenon, particularly in elderly patients. Treatment rates remain low across virtually all patient, provider, and hospital-level characteristics, even after fragility fractures. In-hospital initiation is one of the options to increase treatment rates and improve osteoporosis management. However, multiple factors contribute to the failure of initiating appropriate treatment of osteoporosis in patients with fragility fractures. These include a lack of knowledge in osteoporosis and an absence of a comprehensive treatment guideline among family physicians and orthopedic surgeons. Furthermore, orthopedic surgeons are hardly willing to accept their responsibility for osteoporosis treatment due to the fact that they are usually not familiar with the initiation of specific drug treatments. The presented algorithm offers trauma surgeons and orthopedic surgeons a safe and simple guided pathway of treating osteoporosis in postmenopausal women appropriately after fragility fractures based on the current literature. From our point of view, this algorithm is useful for almost all cases and the user can expect treatment recommendations in more than 90 % of all cases. Nevertheless, some patients may require specialized review by an endocrinologist. The proposed algorithm may help to increase the rate of appropriate osteoporosis treatment hence reducing the rates of fragility fractures. PMID:23681470

Gosch, M; Kammerlander, C; Roth, T; Doshi, H K; Gasser, R W; Blauth, M

2013-05-17

339

Orthopedic Considerations in the Pedestrian versus Motor Vehicle Accident Polytrauma Patient.  

PubMed

Pedestrian versus motor vehicle accidents (PVMVAs) are a common cause of morbidity and mortality around the globe. Past models of PVMVAs assume lower-extremity vehicle contact as the initiating event, with a subsequent predicted injury sequence consisting of a lower extremity injury followed by injury to the body, head, and upper extremities. The term "fatal triad" was first coined by Farley, which described concomitant injuries to the skull, pelvis, and extremity fractures. Over the years, this once well-accepted model of injury has been under scrutiny by numerous orthopedic researchers, and it has lost credibility. This case presentation glaring reveals that the patient incurred which is referred to as the "fatal triad", in contrast to the commonly circulated thoughts of biodynamic mechanisms of PVMVA fractures. More research in this arena is warranted. This lack of information contributes to the morbidity and mortality associated with such devastating injuries. The overlying theme displayed in the data analyzed in this paper demonstrates the vital importance of the orthopedic surgeon in the management of the PVMVA patient. No matter the particular mechanism of injury, occurrence, or agreed-upon treatment protocol, the role of the orthopedic physician is instrumental to the wellbeing of the PVMVA trauma patient. PMID:23259110

Samona, Jason; Colen, Robert

2012-06-17

340

Orthopedic Considerations in the Pedestrian versus Motor Vehicle Accident Polytrauma Patient  

PubMed Central

Pedestrian versus motor vehicle accidents (PVMVAs) are a common cause of morbidity and mortality around the globe. Past models of PVMVAs assume lower-extremity vehicle contact as the initiating event, with a subsequent predicted injury sequence consisting of a lower extremity injury followed by injury to the body, head, and upper extremities. The term “fatal triad” was first coined by Farley, which described concomitant injuries to the skull, pelvis, and extremity fractures. Over the years, this once well-accepted model of injury has been under scrutiny by numerous orthopedic researchers, and it has lost credibility. This case presentation glaring reveals that the patient incurred which is referred to as the “fatal triad”, in contrast to the commonly circulated thoughts of biodynamic mechanisms of PVMVA fractures. More research in this arena is warranted. This lack of information contributes to the morbidity and mortality associated with such devastating injuries. The overlying theme displayed in the data analyzed in this paper demonstrates the vital importance of the orthopedic surgeon in the management of the PVMVA patient. No matter the particular mechanism of injury, occurrence, or agreed-upon treatment protocol, the role of the orthopedic physician is instrumental to the wellbeing of the PVMVA trauma patient.

Samona, Jason; Colen, Robert

2012-01-01

341

A new index for the performance evaluation of parallel manipulators: A study on planar parallel manipulators  

Microsoft Academic Search

This paper addresses the issue of performance evaluation of parallel manipulators. In the analysis and design process of parallel manipulators, the performance evaluation is the most important problem. The developed index will be fundamentally involved in the process, especially in that of optimum design. Although parallel manipulators have been extensively studied for more than twenty years, unfortunately, the concepts of

Xin-Jun Liu; Chao Wu; Jinsong Wang

2008-01-01

342

The Kinematics and Dynamics of Space Manipulators: The Virtual Manipulator Approach  

Microsoft Academic Search

Future robotic manipulator systems will be required to per form complex tasks in space such as satellite repair. These robotic manipulators will encounter a number of kinematic, dynamic, and control problems caused by the dynamic coup ling between the manipulators and its spacecraft. This dy namic coupling also makes it difficult to analyze these sys tems. This paper introduces a

Z. Vafa; Steven Dubowsky

1990-01-01

343

Mobile Manipulation of Humanoid Robots - Body and Leg Control for Dual Arm Manipulation  

Microsoft Academic Search

A control method for humanoid robots of mobile manipulation is proposed. A robot autonomously steps or controls its body pose while performing various manipulation tasks with its hands; that enables dexterous and stable manipulation. Two hands always move along their desired trajectories by impedance control for carrying out a given task. Coordinating with this motion of the hands, the robot

Kenji Inoue; Yusuke Nishihama; Tatsuo Arai; Yasushi Mae

2002-01-01

344

Manipulation of biological objects in micromachined structures  

Microsoft Academic Search

Several methods for the manipulation of biological objects are developed using micromachined structures. The electrostatic effects under high-frequency field, such as dielectrophoresis, electrostatic orientation and electrorotation, are used for the actuation of the objects, by which (1) cell handling, separation, and their fusion, (2) stretching of DNA molecules and their fixation onto substrate, (3) manipulation of protein molecules, and (4)

Masao Washizu

1992-01-01

345

Grasping and Manipulation in Humanoid Robotics  

Microsoft Academic Search

Humanoid robotics is attracting the interest of many research groups world-wide. In particular, developing humanoids requires the implementation of manipulation capabilities, which is still a most complex problem in robotics. This paper presents an overview of current activities in the development of humanoid robots, with special focus on manipulation. Then we discuss our current approach to the design and development

Cecilia Laschi; Paolo Dario; Maria Chiara Carrozza; Eugenio Guglielmelli; Giancarlo Teti; Davide Taddeucci; Fabio Leoni; Bruno Massa; Massimiliano Zecca; Roberto Lazzarini

346

Smart Blocks: a tangible mathematical manipulative  

Microsoft Academic Search

We created Smart Blocks, an augmented mathematical manipulative that allows users to explore the concepts of volume and surface area of 3-dimensional (3D) objects. This interface supports physical manipulation for exploring spatial relationships and it provides continuous feedback for reinforcing learning. By leveraging the benefits of physicality with the advantages of digital information, this tangible interface provides an engaging environment

Audrey Girouard; Erin Treacy Solovey; Leanne M. Hirshfield; Stacey Ecott; Orit Shaer; Robert J. K. Jacob

2007-01-01

347

Dynamic Modeling of Tow Flexible Link Manipulators  

Microsoft Academic Search

Modeling and vibration of a flexible link manipulator with tow flexible links and rigid joints are investigated which can include an arbitrary number of flexible links. Hamilton principle and finite element approach is proposed to model the dynamics of flexible manipulators. The links are assumed to be deflection due to bending. The association between elastic displacements of links is investigated,

E. Abedi; A. Ahmadi Nadooshan; S. Salehi

2008-01-01

348

The ecological significance of manipulative parasites  

Microsoft Academic Search

The diversity of ways in which host manipulation by parasites interferes with ecological and evolutionary processes governing biotic interactions has been recently documented, and indicates that manipulative parasites are full participants in the functioning of eco- systems. Phenotypic alterations in parasitised hosts modify host population ecology, apparent competition processes, food web structure and energy and nutrient flow between habitats, as

Thierry Lefevre; Camille Lebarbenchon; Michel Gauthier-Clerc; Dorothee Misse ´; Robert Poulin; Frederic Thomas

2008-01-01

349

Synergy in the design of mobile manipulation  

Microsoft Academic Search

As our robots develop greater range, autonomy, and sensor payloads, the desire to more fully interact with the environment has led researchers to the obvious integration of manipulators on their machines. This paper explores the integration of locomotion and manipulation in diverse forms, defining and then testing seven general design rules. The kinematics study reports on system level choices for

Robert O. Ambrose; Robert T. Savely

2002-01-01

350

Intelligent Learning for Deformable Object Manipulation  

Microsoft Academic Search

The majority of manipulation systems are designed with the assumption that the objects being handled are rigid and do not deform when grasped. This paper addresses the problem of robotic grasping and manipulation of 3-D deformable objects, such as rubber balls or bags filled with sand. Specifically, we have developed a generalized learning algorithm for handling of 3-D deformable objects

Ayanna M. Howard; George A. Bekey

2000-01-01

351

Advertising as Manipulation of Social Learning  

Microsoft Academic Search

By combining a theory of herding behavior with the phenomenon of availability heuristic we present a model in which a consumer who is uncertain about product quality, rationally chooses the product with which he is most familiar. Firms can manipulate this social learning process by making people more familiar with their products through advertising. Despite such manipulation from advertising, it

Kjell Arne Brekke; Mari Rege

352

EMG controlled manipulation with variable viscoelastic characteristics  

Microsoft Academic Search

The present paper proposes a new human interface regulating both the viscoelastic character- istics and the motion of the robot manipulator by the EMG signals picked up from the subject. The desired trajectory intended by the subject is generated through the bilinear internal arm model with the EMG input signals, and then the viscoelastic coefficients of robot manipulator are regulated

Koji Ito; Mikiko Hori; Toshio Kondo

2002-01-01

353

Virtual Object Manipulation using a Mobile Phone  

Microsoft Academic Search

Augmented Reality (AR) on mobile phones has reached a level of maturity where it can be used as a tool for 3D object manipulation. In this paper we look at user interface issues where an AR enabled mobile phone acts as an interaction device. We discuss how traditional 3D manipulation techniques apply to this new platform. The high tangibility of

Anders Henrysson; Mark Billinghurst; Mark Ollila

2005-01-01

354

Virtual Liquid Manipulation Using General Shape Vessel  

Microsoft Academic Search

Describes a method to realize the interactive manipulation of a virtual liquid using virtual vessels which are expressed by a general convex-shape polyhedron. We propose a liquid manipulation model which has some functions to treat the relation between the volume of liquid in a vessel and the height level of the liquid surface in it while it is being tilted.

Kenji Funahashi; Yuji Iwahori

2001-01-01

355

Improved joint design for conventional industrial manipulators  

Microsoft Academic Search

This paper presents a joint sensor and control system design that can significantly enhance the performance of many conventional industrial manipulators. Most industrial robotic manipulators are fairly good positioning mechanisms but experience difficulty (i.e., become unstable) when making contact with objects (especially objects having different stiffnesses). The primary problem is due to large frictional forces present in the drive trains

R. L. Kress; J. F. Jansen

1993-01-01

356

Manipulator Comparative Testing Program: Final Report.  

National Technical Information Service (NTIS)

The manipulator systems tested included the Meidensha BILARM 83A, the Central Research Laboratories Model M-2, and the GCA PaR Systems Model 6000. Six manipulator and control mode combinations were evaluated: (1) the BILARM in master/slave mode without fo...

J. V. Draper S. J. Handel E. Sundstrom J. N Herndon Y. Fujita

1987-01-01

357

DC motor driven robotic manipulator control  

Microsoft Academic Search

A controller design for a dc motor driven robotic manipulator is presented. The main difficulties are caused by the Coulomb frictions, disturbance due to the gravitational pull and the rather stiff spring effect of the link between the drive motor and the manipulator arm. The objective is to design a feedback controller which ensures zero steady state positioning error. It

S. C. Won; D. J. Lim; D. H. Chyung

1985-01-01

358

Primary Payer Status is Associated with the Use of Nerve Block Placement for Ambulatory Orthopedic Surgery  

PubMed Central

Introduction Although more than 30 million patients in the United States undergo ambulatory surgery each year, it remains unclear what percentage of these patients receive a perioperative nerve block. We reviewed data from the 2006 National Survey of Ambulatory Surgery (NSAS) to determine the demographic, socioeconomic, geographic, and clinical factors associated with the likelihood of nerve block placement for ambulatory orthopedic surgery. The primary outcome of interest was the association between primary method of payment and likelihood of nerve block placement. Additionally, we examined the association between type of surgical procedures, patient demographics, and hospital characteristics with the likelihood of receiving a nerve block. Methods This cross-sectional study reviewed 6,000 orthopedic anesthetics from the 2006 NSAS dataset, which accounted for over 3.9 million orthopedic anesthetics when weighted. The primary outcome of this study addressed the likelihood of receiving a nerve block for orthopedic ambulatory surgery according to the patient’s primary method of payment. Secondary endpoints included differences in demographics, surgical procedures, side effects, complications, recovery profile, anesthesia staffing model, and total perioperative charges in those with and without nerve block. Results Overall, 14.9% of anesthetics in this sample involved a peripheral nerve block. Length of time in postoperative recovery, total perioperative time, and total charges were less for those receiving nerve blocks. Patients were more likely to receive a nerve block if their procedures were performed in metropolitan service areas (OR 1.86, 95% CI 1.19-2.91, p=0.007) or freestanding surgical facilities (OR 2.27, 95% CI 1.74-2.96, p<0.0001), and if payment for their surgery was supported by government programs (OR 2.5, 95% CI 1.01-6.21, p=0.048) or private insurance (OR 2.62, 95% CI 1.12-6.13, p=0.03) versus self-pay or charity care. Conclusion For patients receiving ambulatory orthopedic surgery in the United States, our results suggest that geographic and socioeconomic factors are associated with different likelihoods of perioperative peripheral nerve block placement.

Tighe, Patrick J.; Brennan, Meghan; Moser, M.; Boezaart, Andre P.; Bihorac, Azra

2012-01-01

359

Hospital characteristics and patient populations served by physician owned and non physician owned orthopedic specialty hospitals  

PubMed Central

Background The emergence of physician owned specialty hospitals focusing on high margin procedures has generated significant controversy. Yet, it is unclear whether physician owned specialty hospitals differ significantly from non physician owned specialty hospitals and thus merit the additional scrutiny that has been proposed. Our objective was to assess whether physician owned specialty orthopedic hospitals and non physician owned specialty orthopedic hospitals differ with respect to hospital characteristics and patient populations served. Methods We conducted a descriptive study using Medicare data of beneficiaries who underwent total hip replacement (THR) (N = 10,478) and total knee replacement (TKR) (N = 15,312) in 29 physician owned and 8 non physician owned specialty orthopedic hospitals during 1999–2003. We compared hospital characteristics of physician owned and non physician owned specialty hospitals including procedural volumes of major joint replacements (THR and TKR), hospital teaching status, and for profit status. We then compared demographics and prevalence of common comorbid conditions for patients treated in physician owned and non physician owned specialty hospitals. Finally, we examined whether the socio-demographic characteristics of the neighborhoods where physician owned and non physician owned specialty hospitals differed, as measured by zip code level data. Results Physician owned specialty hospitals performed fewer major joint replacements on Medicare beneficiaries in 2003 than non physician owed specialty hospitals (64 vs. 678, P < .001), were less likely to be affiliated with a medical school (6% vs. 43%, P = .05), and were more likely to be for profit (94% vs. 28%, P = .001). Patients who underwent major joint replacement in physician owned specialty hospitals were less likely to be black than patients in non physician owned specialty hospitals (2.5% vs. 3.1% for THR, P = .15; 1.8% vs. 6.3% for TKR, P < .001), yet physician owned specialty hospitals were located in neighborhoods with a higher proportion of black residents (8.2% vs. 6.7%, P = .76). Patients in physician owned hospitals had lower rates of most common comorbid conditions including heart failure and obesity (P < .05 for both). Conclusion Physician owned specialty orthopedic hospitals differ significantly from non physician owned specialty orthopedic hospitals and may warrant the additional scrutiny policy makers have proposed.

Cram, Peter; Vaughan-Sarrazin, Mary S; Rosenthal, Gary E

2007-01-01

360

The Immediate Effects of Thoracic Spine and Rib Manipulation on Subjects with Primary Complaints of Shoulder Pain  

PubMed Central

Shoulder pain is a common orthopedic condition seen by physical therapists, with many potential contributing factors and proposed treatments. Although manual physical therapy interventions for the cervicothoracic spine and ribs have been investigated for this patient population, the specific effects of these treatments have not been reported. The purpose of this investigational study is to report the immediate effects of thoracic spine and rib manipulation in patients with primary complaints of shoulder pain. Using a test-retest design, 21 subjects with shoulder pain were treated during a single treatment session with high-velocity thrust manipulation to the thoracic spine or upper ribs. Post-treatment effects demonstrated a 51% (32mm) reduction in shoulder pain, a corresponding increase in shoulder range of motion (30°-38°), and a mean patient-perceived global rating of change of 4.2 (median 5). These immediate post-treatment results suggest that thoracic and rib manipulative therapy is associated with improved shoulder pain and motion in patients with shoulder pain, and further these interventions support the concept of a regional interdependence between the thoracic spine, upper ribs, and shoulder.

Strunce, Joseph B.; Walker, Michael J.; Boyles, Robert E.; Young, Brian A.

2009-01-01

361

Microparticle Manipulation Using Inertial Forces  

NASA Astrophysics Data System (ADS)

Manipulation (transport, positioning, separation, or removal) of micro- and nanoparticles has become an increasingly vibrant field of research. We present a simple method to transport a large number of microparticles in parallel. Piezoelectric shear plates are used to excite asymmetric shear waves which are coupled into a substrate. At the surface of the substrate, linear motion of particles is induced due to inertial forces on the particles and the stick-slip effect. While the approach is very versatile and can be used for a wide range of particle and substrate combinations, it is selective to the particle mass and the surface chemistry. In addition to the study of particle transport, the tribological behavior of the particles on the surface can be investigated by applying a symmetric waveform to the piezo, which allows the probing of the static friction force between the particle and substrate. A simple dynamic model to describe the behavior will be discussed. The frictional behavior of particles on chemically functionalized surfaces will be presented.

Eglin, Michael; Eriksson, Mark A.; Carpick, Robert W.

2005-03-01

362

Microcrystal manipulation with laser tweezers.  

PubMed

X-ray crystallography is the method of choice to deduce atomic resolution structural information from macromolecules. In recent years, significant investments in structural genomics initiatives have been undertaken to automate all steps in X-ray crystallography from protein expression to structure solution. Robotic systems are widely used to prepare crystallization screens and change samples on synchrotron beamlines for macromolecular crystallography. The only remaining manual handling step is the transfer of the crystal from the mother liquor onto the crystal holder. Manual mounting is relatively straightforward for crystals with dimensions of >25?µm; however, this step is nontrivial for smaller crystals. The mounting of microcrystals is becoming increasingly important as advances in microfocus synchrotron beamlines now allow data collection from crystals with dimensions of only a few micrometres. To make optimal usage of these beamlines, new approaches have to be taken to facilitate and automate this last manual handling step. Optical tweezers, which are routinely used for the manipulation of micrometre-sized objects, have successfully been applied to sort and mount macromolecular crystals on newly designed crystal holders. Diffraction data from CPV type 1 polyhedrin microcrystals mounted with laser tweezers are presented. PMID:23793156

Wagner, Armin; Duman, Ramona; Stevens, Bob; Ward, Andy

2013-06-13

363

Genetic manipulation system in propionibacteria.  

PubMed

Members of the genus Propionibacterium are widely used in the production of vitamin B12, tetrapyrrole compounds, and propionic acid as well as in probiotic and cheese industries. Shuttle vectors were developed in propionibacteria using replicons from endogenous plasmids in Propionibacterium and Escherichia coli and an appropriate selection marker. The efficient transformation was achieved using the shuttle vector prepared from Propionibacterium freudenreichii to overcome the high restriction modification system in propionibacteria. Expression vectors with native promoters for use in propionibacteria were also developed. Using this system, cholesterol oxidase, which is used as a diagnostic enzyme, was produced in P. freudenreichii. Genes involved in 5-aminolevulinic acid (ALA) and vitamin B12 biosynthesis in propionibacteria were isolated. ALA in propionibacteria could be synthesized via both the C4 pathway (condensation of glycine and succinyl CoA) and the C5 pathway (from glutamate). The hemA gene encoding ALA synthase from Rhodobacter spheroides, was overexpressed and ALA accumulated in P. freudenreichii. Thus, the genetic manipulation systems in propionibacteria will facilitate genetic studies of probiotics and the vitamin B12 biosynthetic pathway. PMID:16233156

Kiatpapan, Pornpimon; Murooka, Yoshikatsu

2002-01-01

364

Manipulation of DNA with Nanotubes*  

NASA Astrophysics Data System (ADS)

The dip-pen method of manipulating alkane thiols with an Atomic Force Microscope (AFM) tip (Piner et al Science.283, 661 1999) opens the door to the possibility of using minute tools, such as nanotubes, to arrange molecules on a surface. We are interested in this method to fabricate DNA microarrays for applications in DNA computation, genomics, and genetic anlysis. We explore the use of a nanotube mounted on an AFM tip as a device to move material on the nanometer scale level. A small droplet of DNA solution is deposited on gold-coated mica. The nanotube is subsequently immersed in the solution while in intermittent-contact mode. A voltage pulse is applied to facilitate the DNA transfer onto the nanotube. A change in the resonant frequency of the cantilever indicates that DNA has been adsorbed on the nanotube. Using the change in resonant frequency we establish the repeatability in the quantity of DNA adsorbed. We present results of attempts at the reverse procedure, depositing the DNA on a surface and at imaging a surface directly with the DNA/nanotube combination. *Research supported by NSF

Gillmor, Susan; Moloni, Katerina; Lagally, Max

2000-03-01

365

Direct Manipulation and Other Styles of Man-Machine Interaction.  

National Technical Information Service (NTIS)

The direct manipulation (DM) approach to user-computer interaction, where the user directly manipulates the object presented on the screen is discussed. It is shown that DM is quite complex with respect to conventional dialog styles. Direct manipulation i...

J. M. Versendaal

1988-01-01

366

Fault Tolerant Kinematic Control of Hyper-Redundant Manipulators.  

National Technical Information Service (NTIS)

Hyper-redundant spatial manipulators possess fault-tolerant features because of their redundant structure. The kinematic control of these manipulators is investigated with special emphasis on fault-tolerant control. The manipulator tasks are viewed in the...

N. S. Bedrossian

1994-01-01

367

Anthropomorphic Master/Slave Manipulator System.  

National Technical Information Service (NTIS)

An anthropomorphic master/slave manipulator system is described. The master arm apparatus includes: master tubular articulated portions which are coaxially adjacent to one another and relatively rotatable, and master transducing apparatus responsive to th...

H. C. Vykukal R. F. King W. C. Vallotton

1974-01-01

368

A Family of Models for Manipulation Planning  

Microsoft Academic Search

Manipulation tasks are those that cannot be accom- plished without making and breaking contacts. If manip- ulation tasks are to be performed by autonomous robots, they must have access to planning algorithms that \\

Peng Song; Vijay Kumar; J. C. Trinkle; Jong-Shi Pang

369

Hermes Manipulation System (HERA) Simulation Facility Development.  

National Technical Information Service (NTIS)

A simulator for the Hermes robot arm (HERA), a space manipulator system to perform tasks ranging from capture and berthing to tool operation in various operational modes from fully automatic to purely manual, is described. The HERA simulation facility (HS...

J. J. M. Prins P. Dielman J. A. Hoogstraten

1987-01-01

370

Remote Manipulators and Mass Transfer Study.  

National Technical Information Service (NTIS)

The objectives of this study are to determine the applicability of manipulator systems to extravehicular construction and maintenance tasks from manned space vehicles, to define problem areas, and to begin conceptual design studies for selected systems. T...

R. H. Blackmer

1968-01-01

371

Kinematic Analysis of the Arid Manipulator.  

National Technical Information Service (NTIS)

The kinematic structure of the ARID manipulator lends itself to simple forward and inverse kinematics analysis. The purpose of this paper is to fully document and verify an existing analysis. The symbolic software package MATHEMATICA was used to produce a...

K. L Doty

1992-01-01

372

Reconfigurable mobile manipulation for accident response  

SciTech Connect

The need for a telerobotic vehicle with hazard sensing and integral manipulation capabilities has been identified for use in transportation accidents where nuclear weapons are involved. The Accident Response Mobile Manipulation System (ARMMS) platform has been developed to provide remote dexterous manipulation and hazard sensing for the Accident Response Group (ARG) at Sandia National Laboratories. The ARMMS' mobility platform is a military HMMWV [High Mobility Multipurpose Wheeled Vehicle] that is teleoperated over RF or Fiber Optic communication channels. ARMMS is equipped with two high strength Schilling Titan II manipulators and a suite of hazardous gas and radiation sensors. Recently, a modular telerobotic control architecture call SMART (Sandia Modular Architecture for Robotic and Teleoperation) has been applied to ARMMS. SMART enables input devices and many system behaviors to be rapidly configured in the field for specific mission needs. This paper summarizes current SMART developments applied to ARMMS.

ANDERSON,ROBERT J.; MORSE,WILLIAM D.; SHIREY,DAVID L.; CDEBACA,DANIEL M.; HOFFMAN JR.,JOHN P.; LUCY,WILLIAM E.

2000-06-06

373

Isotropic Design of Spatial Parallel Manipulators  

Microsoft Academic Search

In this paper, we study the isotropic design of two types of spatial parallel manipulators: a three-degrees-of-freedom manipulator and the Stewart-Gough platform. The isotropic conditions for Jacobian matrices, which relate the input joint velocity and output Cartesian velocity, are determined separately using a pure symbolic method. Thereafter, upon determining the isotropic conditions for both ma- nipulators, the variation of the

A. Fattah; A. M. Hasan Ghasemi

2002-01-01

374

Actuator limitations on achievable manipulator impedance  

Microsoft Academic Search

The effects of actuator torque\\/speed constraints on achievable manipulator mechanical impedance are discussed. Beginning with a simplified dynamic model, a describing function analysis is used to examine the constraints for linear behavior as well as the effective closed-loop impedance resulting from the actuator nonlinear characteristics. It is shown that the closed-loop manipulator impedance is a blend of two extreme impedances,

Dale A. Lawrence

1989-01-01

375

Dynamic manipulation with a one joint robot  

Microsoft Academic Search

We are interested in using low degree-of-freedom robots to perform complex manipulation task without grasping. The robot can use rolling, slipping, and free flight to control more degrees-of-freedom of the part. To demonstrate this we study the controllability properties of planar dynamic nonprehensile manipulation. We show that almost any planar object is small-time locally controllable by point contact, and the

Kevin M. Lynch; Matthew T. Mason

1997-01-01

376

Self-motions of 3-RPS manipulators  

NASA Astrophysics Data System (ADS)

Recently a complete kinematic description of the 3-RPS parallel manipulator was obtained using algebraic constraint equations. It turned out that the workspace splits into two components describing two kinematically different operation modes. In this paper the algebraic description is used to give a complete analysis of all possible self-motions of this manipulator in both operation modes. Furthermore it is shown that a transition from one operation mode into the other in a self-motion is possible.

Schadlbauer, Josef; Husty, Manfred L.; Caro, Stéphane; Wengery, Philippe

2013-03-01

377

Optical trapping, cell manipulation and robotics  

SciTech Connect

A new type of analytical and preparative cytometric instrument was developed. The instrument combines image analysis and machine vision with single cell and chromosome manipulation by means of optical trapping. A proof-of-principle instrument, OCAM, has the ability to locate and analyze biological particles inside an enclosed manipulation chamber, as well as the ability to move and position particles according to preprogrammed protocols. Preliminary results and potential biological applications of such a microrobot are discussed. 12 refs., 8 figs.

Buican, T.N.; Neagley, D.L.; Morrison, W.C.; Upham, B.D.

1989-01-01

378

Quantum manipulation of valleys in bilayer graphene  

NASA Astrophysics Data System (ADS)

The valley pseudospin is an inherent electron degree of freedom in graphene. This work establishes a theory for manipulation of valley pseudospins at the quantum level, in bilayer graphene. Two key mechanisms of valley manipulation are proposed and valley-based quantum devices—qubits and field-effect transistors—are implemented based on the mechanisms. This work provides a crucial step in paving the way for the experimental realization (expansion) of valley-based quantum (classical) information processing.

Wu, G. Y.; Lue, N.-Y.; Chen, Y.-C.

2013-09-01

379

Pilot Study of Ampicillin-Ceftriaxone Combination for Treatment of Orthopedic Infections Due to Enterococcus faecalis?  

PubMed Central

Serious Enterococcus faecalis infections usually require combination therapy to achieve a bactericidal effect. In orthopedic infections, the prognosis of enterococcal etiology is considered poor, and the use of aminoglycosides is questioned. The ampicillin-ceftriaxone combination has recently been accepted as alternative therapy for enterococcal endocarditis. After one of our patients with endocarditis and vertebral osteomyelitis was cured with ampicillin-ceftriaxone, we started a pilot study of orthopedic infections. Patients with infections due to E. faecalis (with two or more surgical samples or blood cultures) diagnosed during 2005 to 2008 were recruited. Polymicrobial infections with ampicillin- and ceftriaxone-resistant microorganisms were excluded. Patients received ampicillin (8 to 16 g/day)-ceftriaxone (2 to 4 g/day) and were followed up prospectively. Of 31 patients with E. faecalis infections, 10 received ampicillin-ceftriaxone. Including the first patient, 11 patients were treated with ampicillin-ceftriaxone: 3 with prosthetic joint infections, 3 with instrumented spine arthrodesis device infections, 2 with osteosynthesis device infections, 1 with foot osteomyelitis, and 2 with vertebral osteomyelitis and endocarditis. Six infections (55%) were polymicrobial. All cases except the vertebral osteomyelitis ones required surgery, with retention of foreign material in six cases. Ampicillin-ceftriaxone was given for 25 days (interquartile range, 15 to 34 days), followed by amoxicillin (amoxicilline) being given to seven patients (64%). One patient with endocarditis died within 2 weeks (hemorrhagic stroke) and was not evaluable. For one patient with prosthesis retention, the infection persisted; 9/10 patients (90%) were cured, but 1 patient was superinfected. Follow-up was for 21 months (interquartile range, 14 to 36 months). Ampicillin-ceftriaxone may be a reasonable synergistic combination to treat orthopedic infections due to E. faecalis. Our experience, though limited, shows good outcomes and tolerability and may provide a basis for further well-designed comparative studies.

Euba, G.; Lora-Tamayo, J.; Murillo, O.; Pedrero, S.; Cabo, J.; Verdaguer, R.; Ariza, J.

2009-01-01

380

Pilot study of ampicillin-ceftriaxone combination for treatment of orthopedic infections due to Enterococcus faecalis.  

PubMed

Serious Enterococcus faecalis infections usually require combination therapy to achieve a bactericidal effect. In orthopedic infections, the prognosis of enterococcal etiology is considered poor, and the use of aminoglycosides is questioned. The ampicillin-ceftriaxone combination has recently been accepted as alternative therapy for enterococcal endocarditis. After one of our patients with endocarditis and vertebral osteomyelitis was cured with ampicillin-ceftriaxone, we started a pilot study of orthopedic infections. Patients with infections due to E. faecalis (with two or more surgical samples or blood cultures) diagnosed during 2005 to 2008 were recruited. Polymicrobial infections with ampicillin- and ceftriaxone-resistant microorganisms were excluded. Patients received ampicillin (8 to 16 g/day)-ceftriaxone (2 to 4 g/day) and were followed up prospectively. Of 31 patients with E. faecalis infections, 10 received ampicillin-ceftriaxone. Including the first patient, 11 patients were treated with ampicillin-ceftriaxone: 3 with prosthetic joint infections, 3 with instrumented spine arthrodesis device infections, 2 with osteosynthesis device infections, 1 with foot osteomyelitis, and 2 with vertebral osteomyelitis and endocarditis. Six infections (55%) were polymicrobial. All cases except the vertebral osteomyelitis ones required surgery, with retention of foreign material in six cases. Ampicillin-ceftriaxone was given for 25 days (interquartile range, 15 to 34 days), followed by amoxicillin (amoxicilline) being given to seven patients (64%). One patient with endocarditis died within 2 weeks (hemorrhagic stroke) and was not evaluable. For one patient with prosthesis retention, the infection persisted; 9/10 patients (90%) were cured, but 1 patient was superinfected. Follow-up was for 21 months (interquartile range, 14 to 36 months). Ampicillin-ceftriaxone may be a reasonable synergistic combination to treat orthopedic infections due to E. faecalis. Our experience, though limited, shows good outcomes and tolerability and may provide a basis for further well-designed comparative studies. PMID:19667290

Euba, G; Lora-Tamayo, J; Murillo, O; Pedrero, S; Cabo, J; Verdaguer, R; Ariza, J

2009-08-10

381

Is routine thromboprophylaxis justified among Indian patients sustaining major orthopedic trauma? A systematic review  

PubMed Central

Venous thromboembolism (VTE) is one of the most common preventable cause of morbidity and mortality after trauma. Though most of the western countries have their guidelines for thromboprophylaxis in these patients, India still does not have these. The increasing detection of VTE among Indian population, lack of awareness, underestimation of the risk, and fear of bleeding complications after chemical prophylaxis have made deep vein thrombosis (DVT) a serious problem, hence a standard guideline for thromboprophylaxis after trauma is essential. The present review article discusses the incidence of DVT and role of thromboprophylaxis in Indian patients who have sustained major orthopedic trauma. A thorough search of ‘PubMed’ and ‘Google Scholar’ revealed 10 studies regarding venous thromboembolism in Indian patients after major orthopedic trauma surgery (hip or proximal femur fracture and spine injury). Most of these studies have evaluated venous thromboembolism in patients of arthroplasty and trauma. The incidence, risk factors, diagnosis and management of VTE in the subgroup of trauma patients (1049 patients) were separately evaluated after segregating them from the arthroplasty patients. Except two studies, which were based on spinal injury, all other studies recommended screening/ thromboprophylaxis in posttraumatic conditions in the Indian population. Color Doppler was used as common diagnostic or screening tool in most of the studies (eight studies, 722 patients). The incidence of VTE among thromboprophylaxis-receiving group was found to be 8% (10/125), whereas it was much higher (14.49%, 40/276) in patients not receiving any form of prophylaxis. Indian patients have definite risk of venous thromboembolism after major orthopedic trauma (except spinal injury), and thromboprophylaxis either by chemical or mechanical methods seems to be justified in them.

Sen, Ramesh K; Tripathy, Sujit K; Singh, Amit K

2011-01-01

382

Health-related quality of life (EQ-5D) before and after orthopedic surgery  

PubMed Central

Background and purpose Population data on mortality and life expectancy are generally available for most countries. However, no longitudinal data based on the health-related quality of life outcome from the EQ-5D instrument have been reported for orthopedic patients. We assessed the effect of orthopedic surgery as measured by EQ-5D. Methods We analyzed EQ-5D data from 2,444 patients who were operated at the Department of Orthopedic Surgery at Karolinska University Hospital, 2001–2005. We also made a comparison between results from this cohort and those from a Swedish EQ-5D population survey. Results The mean EQ-5D index score improved from 0.54 to 0.72. Hip and knee arthroplasty, operations related to previous surgery, trauma-related procedures, and rheumatoid arthritis surgeries had preoperative EQ-5D index scores of 0.48 to 0.52. All of these groups showed substantial improvement in scores (0.63 to 0.80). Patients with tumors or diseases of the elbow/hand showed higher preoperative scores (0.66 to 0.77), which were similar postoperatively. In most patients, the EQ-5D index score improved but did not reach the level reported for an age- and sex-matched population sample (mean difference = 0.11). Interpretation Our results can be used as part of the preoperative patient information to increase the level of patient awareness and cooperation, and to facilitate rehabilitation. In future it will be possible—but not easy—to use the EQ-5D instrument as a complementary consideration in clinical priority assessment.

2011-01-01

383

Parallel microassembly with a robotic manipulation system  

NASA Astrophysics Data System (ADS)

This paper proposes a methodology to assemble multiple micro-components simultaneously with a robotic manipulator using a parallel assembly method. Through manipulating and assembling the micro-components, intricate, out-of-plane, three-dimensional micro-devices can now be fabricated. Use of a parallel microassembly process rather that a serial approach can significantly increase the productivity and reduce the cost of assembling micro-devices. The parallel microassembly operation proposed in this work was developed and implemented on a 6-DOF robot manipulator to attain considerable manufacturing flexibility. In this study, three passive microgrippers were bonded in parallel to the end-effector of the manipulator. Three microparts were then grasped by the grippers from the worktable of the manipulator, rotated 90°, and assembled onto the base substrate simultaneously. During the parallel microassembly operation, the visual image may not be able to monitor all three gripper-part pairs simultaneously due to the limited field of view of the microscope. Through the use of an alignment-calibration algorithm with only one gripper-part set, the remaining two sets were successfully manipulated and inserted onto the desired assembly location.

Chu, Henry K.; Mills, James K.; Cleghorn, William L.

2010-12-01

384

Giant benign nodular hidradenoma of the shoulder: A rare tumor in orthopedic practice  

PubMed Central

A clear cell hidradenoma is a rare dermal tumor, which is believed to originate from the apical portion of the sweat glands. The usual size reported is 5–30 mm. It is generally found in the head, face, and upper extremity regions. This lesion has not been reported to be large enough to impinge a joint range of motion. Hence, its description in the orthopedic literature is extremely rare. We present a giant benign nodular hidradenoma presenting as painful restriction of the right shoulder joint in a 35-year-old male.

Singhal, Vibhore; Sharma, Sansar C.; Anil, Juyal; Sachan, P. K.; Harsh, Meena; Singhal, Surina; Raghuvanshi, Shailendra

2010-01-01

385

Geriatric intervention in elderly patients with hip fracture in an orthopedic ward  

PubMed Central

Abstract: Background: Hip fracture is a common cause of long hospital stay in the elderly. Approximately one third of these patients die within the first year. As a consequence geriatric and orthopedic collaboration (orthogeriatrics) has been organized in different ways. The aim of this study is to evaluate the efficiency of a multidisciplinary geriatric in-hospital intervention on patient outcome. Methods: A total of 495 elderly hip fracture patients consecutively admitted to orthopedic surgery, were followed. Data were based on medical records. The intervention group (n=233) was compared to a historical cohort group (n=262) receiving traditional orthopedic treatment. Intervention program was based on initial physical and mental screening and evaluation, geriatric-focused care, and early discharge planning. The intervention was provided by a multidisciplinary geriatric team. After discharge, follow-up home-visits by a physiotherapist were performed, except for patients discharged to nursing homes, due to a 24-hour staff and easy access to the GP. Results: Median length of stay was reduced from 15 to 13 days. More patients began treatment with calcium/vitamin-D and bisphosphonate (p=sig). There was no difference in hemoglobin variation between the time of admission and three to six months post admission, and no difference in three-month readmissions (odds ratio (OR) = 1.09 [95%CI: 0.71;1.67]). Discharge destination was unchanged (OR=0.93 [95%CI: 0.52; 1.65]). In-hospital mortality was 8% in the intervention group vs. 6% (p=0.48), in the control group. Three-month mortality was 16% in the intervention group vs. 15% (p=0.39), in the control group. In the intervention group, residents from nursing homes had a higher three-month mortality (OR=2.37 [95% CI: 0.99; 5.67]), and the risk of new fractures within two years decreased from 9.5% to 7.7%, though not statistically significant. Conclusion: Our study indicates that co-management of hip fracture patients by orthopedic surgeons and geriatricians may be associated with a reduction in length of hospital stay without negatively affecting major patient outcomes. The concept should be further developed particularly among the frail elderly.

Gregersen, Merete; Metz M?rch, Marianne; Hougaard, Kjeld; Marie Damsgaard, Else

2012-01-01

386

Psychological distress and quality of life after orthopedic trauma: an observational study  

PubMed Central

Objective Little is known about the clinical consequences of psychological morbidity associated with orthopedic trauma. The objective of our study was to investigate the extent of psychological symptoms that patients experience following orthopedic trauma and whether these are associated with quality of life. Methods All patients attending 10 orthopedic fracture clinics at 3 university-affiliated hospitals between January and October 2003 were screened for study eligibility. Eligible patients were aged 16 years or older, were English-speaking, were being followed actively for a fracture(s), were cognitively able to complete the questionnaires and provided informed consent. All consenting patients completed a baseline assessment form, the Symptom Checklist-90-Revised and a health-related quality of life questionnaire (the Medical Outcomes Study 36-item Short Form [SF-36]). We conducted regression analyses to determine predictors of quality of life among study patients. Results Of the patients, 250 were eligible, and 215 agreed to participate; 59% were men; the patients' mean age was 44.5 (standard deviation [SD] 18.8) years. Over one-half (54%) of the patients had lower extremity fractures. Patient Physical Component summary scores were associated with older age (? = –0.28, p < 0.001), ongoing litigation (? = –0.18, p = 0.02), fracture location (? = –0.18, p = 0.01) and Positive Symptom Distress Index (i.e., the intensity of psychological symptoms; ? = –0.08, p = 0.003). This model predicted 21% of the variance in patients' Physical Component summary scores. Somatization was an important psychological symptom negatively associated with Physical Component summary scores. Reduced Mental Component summary scores were associated with ongoing litigation (? = –0.18, p = 0.03) and Global Severity Index of psychological symptoms (? = –0.50, p < 0.001). This model explained 31% of the variability in patients' Mental Component summary scores. Conclusion In a prospective study of 215 patients, 1 in 5 met the threshold for psychological distress. Only ongoing litigation and psychological symptoms were significantly associated with both SF-36 Physical Component and Mental Component summary scores. Future research is necessary to determine whether orthopedic trauma patients would benefit from early screening and intervention to address comorbid psychopathology.

Bhandari, Mohit; Busse, Jason W.; Hanson, Beate P.; Leece, Pamela; Ayeni, Olufemi R.; Schemitsch, Emil H.

2008-01-01

387

Investigation of fatigue failure of a stainless steel orthopedic implant device  

NASA Astrophysics Data System (ADS)

An orthopedic implant (rush nail) fractured in a patient at a location that corresponded to the site of a prior fracture of the bone (right femur). The crack propagation in the implant proceeded from both sides of the nail, and the final fracture occurred by ductile shear in the midsection of the nail. Dimple structures and tear ridges between fatigue striation patches were observed on the fractured surface. Moreover, the device fractured within a short period of use. Contrary to post-procedure instructions, the patient placed the body’s full weight on the implanted leg at least once, perhaps twice, causing overload-induced fatigue failure of the implant.

Sivakumar, M.; Kamachi Mudali, U.; Rajeswari, S.

1994-02-01

388

[Peripheral regional block role in orthopedics in pediatric patients with cerebral palsy].  

PubMed

Haemodynamics of 58 Pediatric patients with cerebral palsy was studied during combined anaesthesia based on sevoflurane and peripheral nerve block. Sevoflurane and peripheral nerve block with infusion support 14-15 ml/kg/ hr provide stable cardiac output during orthopedic surgeries in Pediatric patients with cerebral palsy. Excessive arterial hypotension and total peripheral vascular resistance decrease were registered in older patients as results of more pronounced vascular effect of anaesthetics in patients with decreased adaptive-compensatory possibilities and insufficient infusion support. The proposed anaesthesia method provides adequate intraoperative analgesia, fast recovery and comfortable postoperative period. PMID:23808254

Diordiev, A V; Aizenberg, V L

389

Titration of isoflurane using BIS index improves early recovery of elderly patients undergoing orthopedic surgeries  

Microsoft Academic Search

Purpose  This study was designed to investigate the effect of bispectral index (BIS) monitoring on the recovery profiles, level of\\u000a postoperative cognitive dysfunction, and anesthetic drug requirements of elderly patients undergoing elective orthopedic surgery\\u000a with general anesthesia.\\u000a \\u000a \\u000a \\u000a Methods  Sixty-eight patients over the age of 60 were randomized into one of two groups. In the standard practice (SP) group, the anesthesiologists\\u000a were blinded

Jean Wong; Dajun Song; Hannah Blanshard; Deidre Grady; Frances Chung

2002-01-01

390

Adaptive control of free-floating space manipulators using dynamically equivalent manipulator model  

Microsoft Academic Search

In this paper, adaptive control of free-floating space manipulators is considered. The dynamics based on the momentum conservation law for the free-floating space manipulator has non-linear parameterization properties. Therefore, the adaptive control based on a linear parameterization model cannot be used in this dynamics. In this paper, the dynamics of the free-floating space manipulator system are derived using the Dynamically

Osman Parlaktuna; Metin Ozkan

2004-01-01

391

Does acupuncture improve the orthopedic management of chronic low back pain – a randomized, blinded, controlled trial with 3 months follow up  

Microsoft Academic Search

This prospective, randomised controlled trial, with three parallel groups, patient and observer blinded for verum and sham acupuncture and a follow up of 3 months raises the question: “Does a combination of acupuncture and conservative orthopedic treatment improve conservative orthopedic treatment in chronic low back pain (LBP). 186 in-patients of a LBP rehabilitation center with a history of LBP ?6

Albrecht F. Molsberger; Jochen Mau; Danuta B. Pawelec; János Winkler

2002-01-01

392

Risk for postoperative infection after transfusion of white blood cell-filtered allogeneic or autologous blood components in orthopedic patients undergoing primary arthroplasty  

Microsoft Academic Search

BACKGROUND: This study was designed to obtain data on the incidence of postoperative infection in patients undergoing elective orthopedic surgery and receiving white blood cell (WBC)-filtered blood components pre- pared according to current standards. STUDY DESIGN AND METHODS: A total of 308 con- secutive orthopedic patients who opted for preoperative autologous blood donation (PAD) for primary unilateral hip and knee

Petra Innerhofer; Anton Klingler; Christian Klimmer; Dietmar Fries; Walter Nussbaumer

2005-01-01

393

Medicated hydrogels of hyaluronic acid derivatives for use in orthopedic field.  

PubMed

Physical hydrogels have been obtained from hyaluronic acid derivatized with polylactic acid in the presence or in the absence of polyethylene glycol chains. They have been extemporarily loaded with antibacterial agents, such as vancomycin and tobramycin. These medicated hydrogels have been used to coat titanium disks (chosen as simple model of orthopedic prosthesis) and in vitro studies in simulated physiological fluid have been performed as a function of time and for different drug loading and polymer concentration values. Sterilization process performed on the hydrogels does not change their rheological behavior and release properties as well as the chemical structure of starting copolymers. A preliminary test has been performed by coating with the hydrogel a prosthesis that has been inserted in a seat of a lyophilized human femur, to confirm the ability of the hydrogel to adhere to the prosthesis surface also after its insertion in the implant seat. Cell compatibility of obtained hydrogels has been confirmed in vitro by using human dermal fibroblasts chosen as a model cell line. Obtained results suggest the potential use of these hydrogels in the orthopedic field, in particular for the production of antibacterial coatings of prostheses for implant in the human or animal body in the prevention and/or treatment of post surgical infections. PMID:23587968

Pitarresi, Giovanna; Palumbo, Fabio Salvatore; Calascibetta, Filippo; Fiorica, Calogero; Di Stefano, Mauro; Giammona, Gaetano

2013-04-12

394

Dedicated orthopedic trauma theatres: effect on morbidity and mortality in a single trauma centre  

PubMed Central

Background A general trend in orthopedic traumatology is the advent of daily, dedicated orthopedic trauma theatres. Availability of trauma theatres is believed to decrease morbidity and mortality, but this remains unproven. We performed a retrospective review comparing morbidity and mortality outcomes at a single institution before and after the establishment of a dedicated trauma room. The purpose was to determine whether a change in outcomes occurred for a single routine procedure with known outcome expectations (hemiarthroplasty of the hip after femoral neck fracture) with the implementation of a designated trauma theatre. Methods We examined a cohort of 457 elderly patients (245 before and 212 after trauma theatre implementation) who underwent hemiarthroplasty for displaced low-energy subcapital hip fractures. Results Patients in both groups were similar in terms of age, sex ratio and ASA classification. We found statistically significant differences favouring the dedicated trauma room system for postoperative morbidity. Despite this outcome, the average time to surgery for these patients significantly increased. We noted no difference in mortality between the 2 groups. Conclusion The hip fracture population can be treated safely in the context of dedicated trauma room time; however, there needs to be prioritization of hip fractures in a tertiary care centre or other trauma cases will tend to take precedence.

Lemos, David; Nilssen, Eric; Khatiwada, Bikalpa; Elder, Graham M.; Reindl, Rudolph; Berry, Gregory K.; Harvey, Edward J.

2009-01-01

395

A differential scanning calorimetry study of retrieved orthopedic implants made of ultrahigh molecular weight polyethylene.  

PubMed

Differential scanning calorimetry (DSC) was used to examine thermal and thermooxidative properties of ultrahigh molecular weight polyethylene (UHMW-PE) of five acetabular components of failed orthopedic implants retrieved at revision of total hip arthoplasty. The results were compared with controls (unimplanted acetabular cups, a 20-year-old slab of UHMW-PE, and raw material). Profiles of exothermic peaks indicated increased levels of oxidation in all retrieved cups. In three retrieved cups, DSC revealed an additional peak of endotherm that was not seen in control samples. The additional endotherm peaks were not artifacts due to oxidation during scanning, heat buildup during cutting of the samples, or the sterilization method after retrieval. The additional peak was associated with the bulk of the polymer that was extracted with hexane. It varied in relative area, depending on its original location of the sample in a cup, implicating local variability in the extent of changes in material property. The distribution of the changes suggests that, during implantation, tissue exposure and friction affected the level of oxidation and degree of crystallinity in the UHMW-PE to a greater degree than did loading alone. Overall results showed that DSC may be a useful tool in evaluating changes in the properties of UHMW-PE orthopedic components in vivo. PMID:8736025

Witkiewicz, H; Deng, M; Vidovszky, T; Bolander, M E; Rock, M G; Morrey, B F; Shalaby, S W

1996-01-01

396

Nursing Time Study for the Administration of a PRN Oral Analgesic on an Orthopedic Postoperative Unit.  

PubMed

As needed (PRN) oral opioid analgesics are an integral part of many orthopedic postoperative multimodal pain management regimens. However, the unpredictable nature of this dosing method can lead to disruptions in the process of administering the medication, as well as be an interruption to regular nursing activities. This IRB approved quantitative time study tested the hypothesis that a significant amount of nursing time is required in the administration of PRN oral opioid analgesics on a postoperative orthopedic nursing unit. The purpose of this study is to evaluate the time necessary to complete the required steps related to the administration of PRN oral analgesics. Nurses from 28 nursing shifts used a personal digital assistant (PDA) to record the time needed to complete these steps. We determined that 10.9 minutes is the mean time required to administer PRN oral analgesics on this unit. Other time studies have evaluated the medication administration process as a whole. No time studies related to PRN oral analgesic administration have been reported. In phase I of our project, the data were summarized and will be used as a baseline comparison for phase II, in which we will evaluate an oral PCA medication administration system. PMID:23746873

Pizzi, Lois J; Chelly, Jacques E; Marlin, Vanessa

2013-06-01

397

Application of Orthopedic Dual Sliding Compression Plate (ODSCP) in High Medial Tibial Open Wedge Osteotomies  

PubMed Central

Background Angular deformities about the knee are one of the common disorders. High Tibial osteotomy is a way of correcting the deformity. Although the general agreement is focused toward the open wedge technique, discussion about the type of device is a subject to debate. Objectives This current study has attempted to evaluate the results of Orthopedic Dual Sliding Compression Plate (ODSCP) in high medial open wedge osteotomies of the tibia. Patients and Methods In this cross-sectional study, 16 patients with genuvarum undergone high medial tibial open wedge osteotomy and fixed by Orthopedic Dual Sliding Compression Plate. At the time of the last follow up visit, Lysholm score was gathered. Results The mean follow-up time was 9.33 ± 1.87 month. The average age was 45.13 ± 7.25 years. Three patients were male and 13 patients were female. The lysholm score showed a significant difference before and after surgery. Conclusions The ODSCP has many advantages over the other type of plates. It can help the surgeon to operate with a relaxed mind and it is advisable for high tibial medial open wedge osteotomies.

Samani, Seyed Salman; Kachooei, Amir Reza; Ebrahimzadeh, Mohammad Hosein; Omidi Kashani, Farzad; Mahdavian Naghashzargar, Reza; Razi, Shiva

2013-01-01

398

Clinical use of parnaparin in major and minor orthopedic sugery: a review  

PubMed Central

Patients undergoing arthroplasty or other orthopedic surgery show a high risk of venous thromboembolism (VTE), involving mortality, morbidity, and social costs; however, the risk for VTE in minor orthopedic surgery should not be underestimated and antithrombotic prophylaxis may be required. According to the literature, low-molecular-weight heparins (LMWHs) are more effective in preventing VTE than unfractionated heparins (UFHs) or vitamin K antagonists, and have a lower hemorrhagic risk. By comparing different prophylactic regimens, it has been shown that starting the prophylaxis near the time of the operation is the most critical point for efficacy, whether or not the first dose is administered pre- or post-operatively. Moreover, most thromboembolic complications are observed after discharge and, therefore, many clinicians advocate continuing prophylaxis for longer times (6–8 weeks) in order to further reduce the rate for VTE. The literature on parnaparin, a new LMWH, in VTE prophylaxis was reviewed. Parnaparin is equally effective as UFH, but it offers the advantages of a once-daily administration and improved tolerability, thus allowing the home management of patients with no need for laboratory coagulation tests.

Bugamelli, Stefano; Zangheri, Elena; Montebugnoli, Milena; Guerra, Lucia

2008-01-01

399

Preoperative wait time for orthopedic surgeries at a military medical center.  

PubMed

We performed a retrospective review of elective orthopedic surgeries performed at our institution in 2008. Surgical wait time was defined as the interval between when surgery was offered and when it was performed. Data were available for 1,120 patients and included date and type of procedure, patient age, American Society of Anesthesia (ASA) category, and military rank. Mean wait time for all procedures was 69.1 days. Significant differences were found with regard to patient age, ASA class, rank, and type of procedure. Older patients with higher ASA had significantly longer wait times. Enlisted soldiers had the shortest wait times and retirees the longest. Total joint procedures had the longest wait time (mean 140 days) and the highest anesthesia class. Elective trauma procedures had the shortest wait time (mean 27.2 days). Sports procedures accounted for 46.3% of all cases reviewed. In our cohort, older patients with higher ASA class and those undergoing a total joint procedure can expect longer preoperative wait times. No preferential care given to officers, as enlisted soldiers had the shortest wait times. At our military medical center, which closely models a managed care system, patients can expect to wait more than 2 months for elective orthopedic surgeries. PMID:22730852

Wilson, David J; Crawford, David A; Arrington, Edward D

2012-06-01

400

New methods for the detection of orthopedic and other biofilm infections.  

PubMed

The detection and identification of bacteria present in natural and industrial ecosystems is now entirely based on molecular systems that detect microbial RNA or DNA. Culture methods were abandoned, in the 1980s, because direct observations showed that <1% of the bacteria in these systems grew on laboratory media. Culture methods comprise the backbone of the Food and Drug Administration-approved diagnostic systems used in hospital laboratories, with some molecular methods being approved for the detection of specific pathogens that are difficult to grow in vitro. In several medical specialties, the reaction to negative cultures in cases in which overt signs of infection clearly exist has produced a spreading skepticism concerning the sensitivity and accuracy of traditional culture methods. We summarize evidence from the field of orthopedic surgery, and from other medical specialties, that support the contention that culture techniques are especially insensitive and inaccurate in the detection of chronic biofilm infections. We examine the plethora of molecular techniques that could replace cultures in the diagnosis of bacterial diseases, and we identify the new Ibis technique that is based on base ratios (not base sequences), as the molecular system most likely to fulfill the requirements of routine diagnosis in orthopedic surgery. PMID:21204998

Costerton, John William; Post, James Christopher; Ehrlich, Garth D; Hu, Fen Z; Kreft, Rachael; Nistico, Laura; Kathju, Sandeep; Stoodley, Paul; Hall-Stoodley, Luanne; Maale, Gerhard; James, Garth; Sotereanos, Nick; DeMeo, Patrick

2011-01-18

401

Characterization and bond strength of electrolytic HA/TiO2 double layers for orthopedic applications.  

PubMed

Insufficient bonding of juxtaposed bone to an orthopedic/dental implant could be caused by material surface properties that do not support new bone growth. For this reason, fabrication of biomaterials surface properties, which support osteointegration, should be one of the key objectives in the design of the next generation of orthopedic/dental implants. Titanium and titanium alloy have been widely used in several bioimplant applications, but when implanted into the human body, these still contain some disadvantages, such as poor osteointegration (forming a fibrous capsule), wear debris and metal ion release, which often lead to clinical failure. Electrolytic hydroxyapatite/titanium dioxide (HA/TiO2) double layers were successfully deposited on titanium substrates in TiCl4 solution and subsequently in the mixed solution of Ca(NO3)2 and NH4H2PO4, respectively. After annealing at 300 degrees C for 1 h in the air, the coated specimens were evaluated by dynamic cyclic polarization tests, immersion tests, tensile tests, surface morphology observations, XRD analyses and cells culture. The adhesion strength of the HA coating were improved by the intermediate coating of TiO2 from 11.3 to 46.7 MPa. From cell culture and immersion test results, the HA/TiO2 coated specimens promoted not only cells differentiation, but also appeared more bioactive while maintaining non-toxicity. PMID:15880934

Lin, Chi-Min; Yen, Shiow-Kang

2004-11-01

402

Short-term and long-term effects of orthopedic biodegradable implants.  

PubMed

Presently, orthopedic and oral/maxillofacial implants represent a combined $2.8 billion market, a figure expected to experience significant and continued growth. Although traditional permanent implants have been proved clinically efficacious, they are also associated with several drawbacks, including secondary revision and removal surgeries. Non-permanent, biodegradable implants offer a promising alternative for patients, as they provide temporary support and degrade at a rate matching tissue formation, and thus, eliminate the need for secondary surgeries. These implants have been in clinical use for nearly 25 years, competing directly with, or maybe even exceeding, the performance of permanent implants. The initial implantation of biodegradable materials, as with permanent materials, mounts an acute host inflammatory response. Over time, the implant degradation profile and possible degradation product toxicity mediate long-term biodegradable implant-induced inflammation. However, unlike permanent implants, this inflammation is likely to cease once the material disappears. Implant-mediated inflammation is a critical determinant for implant success. Thus, for the development of a proactive biodegradable implant that has the ability to promote optimal bone regeneration and minimal detrimental inflammation, a thorough understanding of short- and long-term inflammatory events is required. Here, we discuss an array of biodegradable orthopedic implants, their associated short- and long- term inflammatory effects, and methods to mediate these inflammatory events. PMID:22043969

Amini, Ami R; Wallace, James S; Nukavarapu, Syam P

2011-01-01

403

Singularity Analysis of a General Class of Planar Parallel Manipulators  

Microsoft Academic Search

With regard to planar parallel manipulators, a general classification of singularities into three groups is introduced. The classification scheme relies on the properties of the Jacobian matrices of the manipulator at hand. The Jacobian matrices of a general class of planar parallel manipulators are derived and the three types of singularities are identified for them. This class contains 20 manipulators

Hamid Reza Mohammadi Daniali; Paul J. Zsombor-murray; Jorge Angeles

1995-01-01

404

Use of force-measuring transducers in manipulator control  

Microsoft Academic Search

This paper investigates two types of control structures for mechanical manipulators using force-measuring transducers with each type targeting specific properties of the manipulator. One approach is to measure torque in the drive train of the manipulator to increase backdrivability, sensitivity, and stiffness. The second approach is to measure the forces and torques at the wrist of the manipulator. This force\\/torque

R. L. Kress; J. F. Jansen

1991-01-01

405

A Behavior Based Approach to Humanoid Robot Manipulation  

Microsoft Academic Search

Current approaches to humanoid robot manipulation typically rely upon detailed models of the ma- nipulator and the object being manipulated. For robots to gain general utility in areas such as space exploration, small-parts assembly, agriculture, end even in our homes, they must be able to intel- ligently manipulate unknown objects in unstructured environments. A behavior based approach to manipulation can

Aaron Edsinger

406

Better with Byzantine: Manipulation-Optimal Mechanisms  

NASA Astrophysics Data System (ADS)

A mechanism is manipulable if it is in some agents’ best interest to misrepresent their private information. The revelation principle establishes that, roughly, anything that can be accomplished by a manipulable mechanism can also be accomplished with a truthful mechanism. Yet agents often fail to play their optimal manipulations due to computational limitations or various flavors of incompetence and cognitive biases. Thus, manipulable mechanisms in particular should anticipate byzantine play. We study manipulation-optimal mechanisms: mechanisms that are undominated by truthful mechanisms when agents act fully rationally, and do better than any truthful mechanism if any agent fails to act rationally in any way. This enables the mechanism designer to do better than the revelation principle would suggest, and obviates the need to predict byzantine agents’ irrational behavior. We prove a host of possibility and impossibility results for the concept which have the impression of broadly limiting possibility. These results are largely in line with the revelation principle, although the considerations are more subtle and the impossibility not universal.

Othman, Abraham; Sandholm, Tuomas

407

Distinguishing manipulated stocks via trading network analysis  

NASA Astrophysics Data System (ADS)

Manipulation is an important issue for both developed and emerging stock markets. For the study of manipulation, it is critical to analyze investor behavior in the stock market. In this paper, an analysis of the full transaction records of over a hundred stocks in a one-year period is conducted. For each stock, a trading network is constructed to characterize the relations among its investors. In trading networks, nodes represent investors and a directed link connects a stock seller to a buyer with the total trade size as the weight of the link, and the node strength is the sum of all edge weights of a node. For all these trading networks, we find that the node degree and node strength both have tails following a power-law distribution. Compared with non-manipulated stocks, manipulated stocks have a high lower bound of the power-law tail, a high average degree of the trading network and a low correlation between the price return and the seller-buyer ratio. These findings may help us to detect manipulated stocks.

Sun, Xiao-Qian; Cheng, Xue-Qi; Shen, Hua-Wei; Wang, Zhao-Yang

2011-10-01

408

Dynamic whole-body robotic manipulation  

NASA Astrophysics Data System (ADS)

The creation of dynamic manipulation behaviors for high degree of freedom, mobile robots will allow them to accomplish increasingly difficult tasks in the field. We are investigating how the coordinated use of the body, legs, and integrated manipulator, on a mobile robot, can improve the strength, velocity, and workspace when handling heavy objects. We envision that such a capability would aid in a search and rescue scenario when clearing obstacles from a path or searching a rubble pile quickly. Manipulating heavy objects is especially challenging because the dynamic forces are high and a legged system must coordinate all its degrees of freedom to accomplish tasks while maintaining balance. To accomplish these types of manipulation tasks, we use trajectory optimization techniques to generate feasible open-loop behaviors for our 28 dof quadruped robot (BigDog) by planning trajectories in a 13 dimensional space. We apply the Covariance Matrix Adaptation (CMA) algorithm to solve for trajectories that optimize task performance while also obeying important constraints such as torque and velocity limits, kinematic limits, and center of pressure location. These open-loop behaviors are then used to generate desired feed-forward body forces and foot step locations, which enable tracking on the robot. Some hardware results for cinderblock throwing are demonstrated on the BigDog quadruped platform augmented with a human-arm-like manipulator. The results are analogous to how a human athlete maximizes distance in the discus event by performing a precise sequence of choreographed steps.

Abe, Yeuhi; Stephens, Benjamin; Murphy, Michael P.; Rizzi, Alfred A.

2013-05-01

409

[Orthopedic rheumatology].  

PubMed

Rheumatic diseases with their progressive inflammatory systematic nature are important diseases any clinical practising orthopaedic doctor is frequently confronted with. In case of mono- or polyarticular joint swelling, stiffness or inflammatory arthralgia, rheumatoid arthritis has to be deliberated particularly in differential diagnostic considerations. When diagnosed early, a joint treatment by an internal specialist as well as the initiation of a basic medicamentous therapy are highly recommended. Therefore, corticosteroids and disease modifying anti-rheumatic drugs (DMARDs) such as methotrexate can be used, in case of failure a treatment with biologicals should follow. The operative therapy depends on the stadium of joint destruction. In early stadiums (LDE 0-3) and in case of therapy resistant inflammation a synovectomy should be performed as a preventive intervention. Given an already advanced destruction, alloarthroplasty or arthrodesis are indicated as reconstructive procedures. PMID:23963988

Holder, M; Henniger, M; Rehart, S

2013-08-20

410

Orthopedic radiology  

SciTech Connect

The book is divided into seven major sections on Decrease in bone density, Osteosclerosis, Localized lesions in bone, Lesions affecting the epiphyses, Abnormalities in the region of the metaphysis, Periosteal reactions, and Abnormalities in size and modelling of bone.

Renton, P.

1989-01-01

411

Infections (Orthopedic)  

MedlinePLUS

... infections. Examples include HIV, rheumatoid arthritis, diabetes mellitus, hemophilia, and sickle cell anemia. You can become infected ... your doctor right away for early diagnosis and treatment if you suspect infection. Tell the doctor about ...

412

Estimating the Degree of Manipulability of Voting Rules for Weak Manipulation  

NASA Astrophysics Data System (ADS)

The problem of individual manipulation in voting in the case of multiple choice is considered. Using Kelly's Dominance Axiom extended preferences (preferences over sets of alternatives) are constructed for the case of 3 alternatives and 5 known voting rules are studied via computational experiments to reveal their degree of manipulability.

Karabekyan, Daniel; Yakuba, Vyacheslav

2010-09-01

413

Manipulation of microfluidic droplets by electrorheological fluid.  

PubMed

Microfluidics, especially droplet microfluidics, attracts more and more researchers from diverse fields, because it requires fewer materials and less time, produces less waste and has the potential of highly integrated and computer-controlled reaction processes for chemistry and biology. Electrorheological fluid, especially giant electrorheological fluid (GERF), which is considered as a kind of smart material, has been applied to the microfluidic systems to achieve active and precise control of fluid by electrical signal. In this review article, we will introduce recent results of microfluidic droplet manipulation, GERF and some pertinent achievements by introducing GERF into microfluidic system: digital generation, manipulation of "smart droplets" and droplet manipulation by GERF. Once it is combined with real-time detection, integrated chip with multiple functions can be realized. PMID:19722203

Zhang, Menying; Gong, Xiuqing; Wen, Weijia

2009-09-01

414

Ultrasonic resonator for manipulation of bacteria  

NASA Astrophysics Data System (ADS)

Ultrasonic manipulation is a contactless and gentle method to manipulate a large number of particles. The method presented here exploits the advantage to simultaneously move bacteria away from a surface by means of acoustic radiation forces. The device for the manipulation consists of five layers (transducer, epoxy adhesive layer, carrier, fluid, reflector), stacked like a conventional planar resonator. The resonator behavior was simulated using the transfer matrix method (TMM). Validation of the model was realized with admittance measurements performed over a wide frequency range (100 kHz - 16 MHz). The TMM-model was used to optimize frequency, layer thickness and material of the resonator in order to find a combination with a high force potential gradient pointing away from the reflector surface into the fluid. The resonator has been experimentally tested with polystyrene particles (1 ?m in diameter) which revealed a good matching with the TMM-model. First preliminary tests with Salmonella Thyphimurium have been done.

Schwarz, T.; Dual, J.

2012-05-01

415

Effects of embryonic manipulation and epigenetics.  

PubMed

Embryonic manipulation techniques, such as in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI), are widely used in assisted reproductive technology (ART), livestock propagation and application in other fields. Fertilization with IVF and ICSI have been shown to be highly effective, and the mice produced by these techniques develop healthily and with a normal appearance. However, there remains a possibility of epigenetic changes being induced by these techniques. The early stage of mammalian development from fertilization to implantation is a period in which global changes in the epigenetic landscape take place. The sperm and oocyte epigenetic profiles are very different from each other, and the epigenetic remodeling process after fertilization exhibits allelic differences. It is during this period that embryonic manipulation is performed. In this review, I discuss the effects of embryonic manipulation procedures in relation to the epigenetic asymmetry that is present in mammalian early development. Such regulation in the preimplantation embryo provides an important insight into epigenetics. PMID:23739123

Kohda, Takashi

2013-06-06

416

Image manipulation and the question of ethics.  

PubMed

In a world of changing technology, image manipulation has become easier to achieve than ever before in the history of illustration. The quality of computer-generated images is such that it is difficult to distinguish them from a conventional photographic image. This article asks whether the industry can, and should, set controls to regulate itself before regulations are set for it by outside agencies. It discusses possible conflicts between ethical questions associated with image manipulation and the rights of image makers to produce creative images. Reference is made to historical incidents of image manipulation for propaganda; and technological advancements which make possible seamless montages of images using computer software programs and colour printers. PMID:8409230

Shapter, M J

1993-07-01

417

Development of a deep ocean electric autonomous manipulator  

Microsoft Academic Search

This paper describes an underwater 3500 m electric manipulator (named Huahai-4E, stands for four functions deep ocean electric\\u000a manipulator in China), which has been developed at underwater manipulation technology lab in Huazhong University of Science\\u000a and Technology (HUST) for a test bed of studying of deep ocean manipulation technologies. The manipulator features modular\\u000a integration joints, and layered architecture control system.

Zhi-Hu Xiao; Guo-Hua Xu; Fu-Yuan Peng; Guo-Yuan Tang; Xiong Shen; Bo Yang

2011-01-01

418

Manipulator for rotating and examining small spheres  

DOEpatents

A manipulator which provides fast, accurate rotational positioning of a small sphere, such as an inertial confinement fusion target, which allows inspecting of the entire surface of the sphere. The sphere is held between two flat, flexible tips which move equal amounts in opposite directions. This provides rolling of the ball about two orthogonal axes without any overall translation. The manipulator may be controlled, for example, by an x- and y-axis driven controlled by a mini-computer which can be programmed to generate any desired scan pattern.

Weinstein, Berthold W. (Livermore, CA); Willenborg, David L. (Livermore, CA)

1980-01-01

419

Manipulating thermal conductivity through substrate coupling  

NASA Astrophysics Data System (ADS)

We report an approach to the thermal conductivity manipulation-substrate coupling. Generally, the phonon scattering with substrates can decrease the thermal conductivity, as observed in recent experiments. However, we find that at certain regions the coupling to substrates can increase the thermal conductivity due to a reduction of anharmonic phonon scattering induced by shift of the phonon band to the low wave vector. In this way, the thermal conductivity can be efficiently manipulated via coupling to different substrates, without changing or destroying the material structures. This idea is demonstrated by calculating the thermal conductivity of modified double-walled carbon nanotubes and also by the ice nanotubes coupled within carbon nanotubes.

Guo, Zhi-Xin; Zhang, Dier; Gong, Xin-Gao

2011-08-01

420

[Confronting the artefact patient with manipulative behavior].  

PubMed

Patients with self-inflicted skin disorders form a rather heterogeneous group. Our paper is intended to provide the practitioner with some orientation concerning interaction and therapeutic procedure in patients with artefactual skin diseases. Basically, these patients should be differentiated according to what extent they are aware of their manipulations. This degree of awareness should then be the guideline for a well-dosed and sensitive confrontation with their manipulative behavior. In any case, a positive result of the confrontation largely depends on the confidential relationship between physician and patient. PMID:2378150

Thölking, H; Bosse, K

1990-05-01

421

3D segmentation of medical images for computer-aided design and rapid prototyping of orthopedic devices  

Microsoft Academic Search

The segmentation of medial images is the first step along the series of events that need to take place during the automated design and rapid prototyping of orthopedic devices. The segmentation algorithm presented in this work, the discrete surface model, is an automated 3D segmentation method that attempts to optimize an energy function based on three distinct potentials: a deformation

Justin R. Kidder; Bartholomew O. Nnaji

1998-01-01

422

An Intelligibility Assessment of Toddlers with Cleft Lip and Palate Who Received and Did Not Receive Presurgical Infant Orthopedic Treatment.  

ERIC Educational Resources Information Center

|The influence of presurgical infant orthopedic treatment (PIO) on speech intelligibility was evaluated with 10 toddlers who used PIO during the first year of life and 10 who did not. Treated children were rated as exhibiting greater intelligibility, however, transcription data indicated there were not group differences in actual intelligibility.…

Konst, Emmy M.; Weersink-Braks, Hanny; Rietveld, Toni; Peters, Herman

2000-01-01

423

Exploring the Relationship Between Leisure and Health of Senior Adults with Orthopedic Disabilities Living in Rural Areas  

Microsoft Academic Search

The purpose of this investigation was to explore the association between leisure-related variables and the perceived physical and mental health of senior adults with orthopedic disabilities who lived in rural areas. Participants were 48 men and women with acquired disabilities who lived in rural areas of the Midwest. They averaged 61 years of age. All were interviewed using an instrument

Dean A. Zoerink

2001-01-01

424

Potential of Stem Cell to Tailor the Bone-Ceramic Interface for Better Fixation of Orthopedic Implants  

Microsoft Academic Search

The main cause of premature failure of an orthopedic implant in vivo is due to various biological reactions with the surrounding tissues\\/environment. Therefore, to combat this situation, continuous efforts have been concentrated to improve biocompatibility of the implant material by adopting different strategies. Extensive study is being made to modify the implants by plasma-spraying bioactive materials, introducing specific surface groups,

Jui Chakraborty; Debabrata Basu

425

An Outcome Observational Study on the Efficacy of Warfarin Usage for Orthopedic Surgery Patients at Munson Medical Center  

Microsoft Academic Search

Warfarin, an oral anticoagulant, is often used prophylactically to treat patients who will be undergoing major orthopedic surgery. Warfarin works as a vitamin K antagonist to prevent blood clots from forming as a result of immobility after surgery. THe degree of anticoagulation in the blood is measured using an international standardized ratio (INR) of the prothrombin time. This study was

Michelle Suppnick

2002-01-01

426

Effect of Antibiotic Treatment on Bacterial Attachment to a DePuy EnduronTM Orthopedic Implant  

Microsoft Academic Search

Background: The increasing incidence of bacterial infections in orthopedic surgery might be related to the increasing application of artificial devices. In most cases, bacteria multiply on the surface of implants in biofilms. Poor penetration of antibiotics, frequent necessity of prosthesis removal, chronic processes and financial costs emphasize the significance of preventive measures. Method: Adhesion of bacterial strains (two Staphylococcus aureus,

Ildikó Kustos; Tamás Kustos; Ferenc Kilár; Gábor Rappai; Béla Kocsis

2005-01-01

427

Seasonal variation in orthopedic health services utilization in Switzerland: The impact of winter sport tourism  

PubMed Central

Background Climate- or holiday-related seasonality in hospital admission rates is well known for many diseases. However, little research has addressed the impact of tourism on seasonality in admission rates. We therefore investigated the influence of tourism on emergency admission rates in Switzerland, where winter and summer leisure sport activities in large mountain regions can generate orthopedic injuries. Methods Using small area analysis, orthopedic hospital service areas (HSAo) were evaluated for seasonality in emergency admission rates. Winter sport areas were defined using guest bed accommodation rate patterns of guest houses and hotels located above 1000 meters altitude that show clear winter and summer peak seasons. Emergency admissions (years 2000–2002, n = 135'460) of local and nonlocal HSAo residents were evaluated. HSAo were grouped according to their area type (regular or winter sport area) and monthly analyses of admission rates were performed. Results Of HSAo within the defined winter sport areas 70.8% show a seasonal, summer-winter peak hospital admission rate pattern and only 1 HSAo outside the defined winter sport areas shows such a pattern. Seasonal hospital admission rates in HSAo in winter sport areas can be up to 4 times higher in winter than the intermediate seasons, and they are almost entirely due to admissions of nonlocal residents. These nonlocal residents are in general -and especially in winter- younger than local residents, and nonlocal residents have a shorter length of stay in winter sport than in regular areas. The overall geographic distribution of nonlocal residents admitted for emergencies shows highest rates during the winter as well as the summer in the winter sport areas. Conclusion Small area analysis using orthopedic hospital service areas is a reliable method for the evaluation of seasonality in hospital admission rates. In Switzerland, HSAo defined as winter sport areas show a clear seasonal fluctuation in admission rates of only nonlocal residents, whereas HSAo defined as regular, non-winter sport areas do not show such seasonality. We conclude that leisure sport, and especially ski/snowboard tourism demands great flexibility in hospital beds, staff and resource planning in these areas.

Matter-Walstra, Klazien; Widmer, Marcel; Busato, Andre

2006-01-01

428

Atomic Manipulation on an Insulator Surface  

NASA Astrophysics Data System (ADS)

The manipulation of atomic and molecular species on metal surfaces with the scanning tunneling microscope (STM) operated at low temperature is a well established method for bottom-up nanofabrication [G. Meyer et al., Single Mol. 1, 79 (2000); N. Lorente, R. Rurali, H. Tang, J. Phys. Condens. Matter 17, S1049 (2005)], but is limited in its understanding and applications by restrictions inherent to the STM technique. These limitations can be overcome by using a dynamic scanning force microscope (SFM) for atomic manipulation that offers three major advantages compared to STM. First, the force microscope allows a quantification of the forces applied during the manipulation process (see Chap. 9), second, it facilitates manipulation at room temperature (see Chaps. 8 and 11) and, third, the technique allows manipulation on electrically insulating surfaces. However, examples for force controlled manipulation of atomic size species on an insulator surface are still scarce regarding experimental evidence [S. Hirth, F. Ostendorf, M. Reichling, Nanotechnology 17, S148 (2006); R. Nishi et al., Nanotechnology 17, S142 (2006)] as well as theoretical explanation [T. Trevethan et al., Phys. Rev. Lett. 98, 028101 (2007); T. Trevethan et al., Phys. Rev. B 76, 085414 (2007)]. Here we demonstrate the force controlled manipulation of water related defects on a CaF2 (111) surface by a raster scanning motion of the tip over a specific surface region. Manipulation is facilitated by repulsive forces exerted by approaching the tip very closely to the detects. We focus mainly on the presentation of manipulation results and discuss the circumstances that allow a control of the manipulation process. The CaF2 (111) surface is specifically well suited for such studies as this surface has been very well characterized by NC-AFM in previous studies [M. Reichling, C. Barth, Phys. Rev. Lett. 83, 768 (1999); C. Barth, M. Reichling, Surf. Sci. 470, L99 (2000); F.J. Giessibl, M. Reichling, Nanotechnology 16, S118 (2005); R. Hoffmann et al., J. Am. Chem. Soc. 127, 17863 (2005)] and contrast formation is understood on a quantitative level [A.S. Foster et al., Phys. Rev. Lett. 86, 2373 (2001); C. Barth et al., J. Phys. Condens. Matter 13, 2061 (2001); A.S. Foster et al., Phys. Rev. B 66, 235417 (2002)]. Furthermore, the geometric and electronic structures of this surface is well understood from a variety of theoretical simulations [A.V. Puchina et al., Solid State Commun. 106, 285 (1998); V.E. Puchin et al., J. Phys. Condens. Matter 13, 2081 (2001); Y. Ma, M. Rohlfing, Phys. Rev. B 75, 205114 (2007); Y. Ma, M. Rohlfing, Phys. Rev. B 77, 115118 (2008)]. Therefore, it can be expected that the experimental evidence of force controlled manipulation presented here will finally be fully explained by further theoretical modeling.

Hirth, Sabine; Ostendorf, Frank; Reichling, Michael

429

Orthopedic intrusion of premaxilla with distraction devices before alveolar bone grafting in patients with bilateral cleft lip and palate.  

PubMed

Surgical repositioning of the downward displaced premaxilla in bilateral cleft lip and palate patients remains a controversial and perplexing issue because of its detrimental effects on the growth of the premaxilla. The purpose of this prospective clinical study was to introduce and evaluate the treatment results of an innovative technique for nonsurgically intruding the downward displaced premaxilla. Eight consecutive cases of bilateral cleft lip and palate at the age of mixed dentition were included for the correction of their premaxillary deformities. A pair of intraoral tooth-borne distraction devices was used for the orthopedic intrusion. Serial lateral and posteroanterior cephalometric radiographs were taken periodically for evaluating the growth of the premaxilla 1 year before the intrusion, changes during the intrusion, and growth/relapse up to 1 year after the intrusion. There was no overgrowth of the premaxilla or overeruption of the maxillary incisors during the 1-year observing period before the orthopedic intrusion. The treatment results revealed that the downward displaced premaxillae were all corrected within 1 month. Cephalometrically, 46 percent of the correction resulted from a true orthopedic intrusion and another 54 percent from a dentoalveolar effect in which the maxillary incisors were intruded and the premaxillary dentoalveolus was shortened. The cephalometric evaluations also implied that what occurred during the orthopedic intrusion was mostly the sutural contraction osteogenesis/osteolysis in the vomeropremaxillary suture combined with slightly mechanical upward displacement of the vomeronasal septum complex and nasal bones. The orthopedic intrusion of the premaxilla with distraction devices is an effective nonsurgical method for correcting the downward displaced premaxilla before alveolar bone grafting in patients with bilateral cleft lip and palate, and the results remained stable after 1 year. PMID:15108871

Liou, Eric Jein-Wein; Chen, Philip K T; Huang, C Shing; Chen, Y Ray

2004-03-01

430

Adaptive force control for the ARM manipulator  

Microsoft Academic Search

The development and modelling of a compliant device to enable compliant force control is described. The early stages of the development of the control formalism is also described, A PUMA 560 six degree-of-freedom manipulator, holding a crack detection probe, is required to make contact with a surface in space and then track along it using force feedback information. A novel

Jason Tisdall; D. Broome

1995-01-01

431

Blade manipulators in turbulent channel flow  

Microsoft Academic Search

We report here the results of a series of careful experiments in turbulent channel flow, using various configurations of blade manipulators suggested as optimal in earlier boundary layer studies. The mass flow in the channel could be held constant to better than 0.1%, and the uncertainties in pressure loss measurements were less than 0.1 mm of water; it was therefore

B. Vasudevan; A. Prabhu; R. Narasimha

1992-01-01

432

Using magnetic nanoparticles to manipulate biological objects  

NASA Astrophysics Data System (ADS)

The use of magnetic nanoparticles (MNPs) for the manipulation of biological objects, including proteins, genes, cellular organelles, bacteria, cells, and organs, are reviewed. MNPs are popular candidates for controlling and probing biological objects with a magnetic force. In the past decade, progress in the synthesis and surface engineering of MNPs has further enhanced this popularity.

Liu, Yi; Gao, Yu; Xu, Chenjie

2013-09-01

433

Opto-electrokinetic manipulation technique for highperformance  

SciTech Connect

This communication first demonstrates bio-compatibility of a recently developed opto-electrokinetic manipulation technique, using microorganisms. Aggregation, patterning, translation, trapping and size-based separation of microorganisms performed with the technique firmly establishes its usefulness for development of a high-performance on-chip bioassay system.

Kwon, Jae-Sung [Purdue University; Ravindranath, Sandeep [Purdue University; Kumar, Aloke [ORNL; Irudayaraj, Joseph [Purdue University; Wereley, Steven T. [Purdue University

2012-01-01

434

Disrupting Reconsolidation: Pharmacological and Behavioral Manipulations  

ERIC Educational Resources Information Center

|We previously demonstrated that disrupting reconsolidation by pharmacological manipulations "deleted" the emotional expression of a fear memory in humans. If we are to target reconsolidation in patients with anxiety disorders, the disruption of reconsolidation should produce content-limited modifications. At the same time, the fear-erasing…

Soeter, Marieke; Kindt, Merel

2011-01-01

435

Understanding hypertension through genetic manipulation in mice  

Microsoft Academic Search

Understanding hypertension through genetic manipulation in mice. With the advances in mouse molecular genetics and physiology during the last decade, the mouse has become the animal model of choice for studying the genetic basis of many diseases. Terms such as “transgenic” and “knockout” have become part of a colloquial language used in most research laboratories that are investigating human diseases.

Branimir Cvetkovic; Curt D Sigmund

2000-01-01

436

High Specific Power Actuators for Robotic Manipulators  

Microsoft Academic Search

Recent advancements in actuator technology suggest that the implementation of reliable, high power-to-weight ratio pneumatic actuation systems is now possible for robotic platforms. Existing robotic manipulator arms for casualty extraction and patient placement use hydraulic actuation, whereas related robotic prosthetic devices typically use heavy actuator motors. We have developed an alternative solution that employs pneumatic artificial muscles (PAMs). The goal

Ryan M. Robinson; Curt S. Kothera; Benjamin K. S. Woods; Robert D. Vocke; Norman M. Wereley

2011-01-01

437

BUTANOL FERMENTATION RESEARCH: UPSTREAM AND DOWNSTREAM MANIPULATIONS  

Technology Transfer Automated Retrieval System (TEKTRAN)

An overview of advances in acetone-butanol fermentation research is presented with specific reference to the history of acetone-butanol fermentation, genetic manipulation of the butanol-producing Clostridium beijerinckii NCIMB 8052, as well as upstream and downstream processing. Butanol is a superi...

438

Manipulation of a humanoid robot by teleoperation  

Microsoft Academic Search

The shape of the humanoid robot is one of the best shapes of remotely controlled robots. However, there are only a few investigations on humanoid teleoperation. In this paper, firstly, a remote cockpit and teleoperation strategy for the humanoid robot (BHR-01) are proposed. Then, we focused on the manipulation and the design of the master arm and hand. The designed

Qiusheng Liu; Qiang Huang; Weimin Zhang; Xingyi Wang; Chengwei Wu; Dongguang Li; Kejie Li

2004-01-01

439

Behavior-Based Assists for Telerobotic Manipulation  

Microsoft Academic Search

Teleoperated manipulation has been a critical tool in hazardous operations where the presence of humans has been precluded since the early days of nuclear material handling. Performance levels and limitations were understood and accepted. However, in the current era of decontamination and decommissioning (D&D) of facilities owned by the U.S. Department of Energy, there has been criticism that traditional remote

Mark W Noakes; William R. Hamel

2008-01-01

440

The `elephant trunk' manipulator, design and implementation  

Microsoft Academic Search

Over that last several years, research in the area of hyper-redundant robots and those robots based on tentacle\\/trunk type manipulators has become of great interest. Though much progress has been obtained in both the areas of robot construction and robot kinematics, there has been little progress in the implementation of a kinematic model for motion on a physical robot. We

M. W. Hannan; I. D. Walker

2001-01-01

441

High degree-of-freedom dynamic manipulation  

NASA Astrophysics Data System (ADS)

The creation of high degree of freedom dynamic mobile manipulation techniques and behaviors will allow robots to accomplish difficult tasks in the field. We are investigating the use of the body and legs of legged robots to improve the strength, velocity, and workspace of an integrated manipulator to accomplish dynamic manipulation. This is an especially challenging task, as all of the degrees of freedom are active at all times, the dynamic forces generated are high, and the legged system must maintain robust balance throughout the duration of the tasks. To accomplish this goal, we are utilizing trajectory optimization techniques to generate feasible open-loop behaviors for our 28 dof quadruped robot (BigDog) by planning the trajectories in a 13 dimensional space. Covariance Matrix Adaptation techniques are utilized to optimize for several criteria such as payload capability and task completion speed while also obeying constraints such as torque and velocity limits, kinematic limits, and center of pressure location. These open-loop behaviors are then used to generate feed-forward terms, which are subsequently used online to improve tracking and maintain low controller gains. Some initial results on one of our existing balancing quadruped robots with an additional human-arm-like manipulator are demonstrated on robot hardware, including dynamic lifting and throwing of heavy objects 16.5kg cinder blocks, using motions that resemble a human athlete more than typical robotic motions. Increased payload capacity is accomplished through coordinated body motion.

Murphy, Michael P.; Stephens, Benjamin; Abe, Yeuhi; Rizzi, Alfred A.

2012-05-01

442

Intelligent learning for deformable object manipulation  

Microsoft Academic Search

This paper addresses the problem of robotic grasping and manipulation of 3D deformable objects, such as rubber balls or bags filled with sand. Specifically, we have developed a generalized learning algorithm for handling of 3D deformable objects in which prior knowledge of object attributes is not required and thus it can be applied to a large class of object types.

Ayanna M. Howard; George A. Bekey

1999-01-01

443

Computational kinematics of multi-arm manipulators  

NASA Astrophysics Data System (ADS)

Kinematics of multi-arm/multi-loop manipulator systems entail highly nonlinear and coupled systems of equations. This thesis studies and offers methods for topology and kinematic analysis of these systems. In particular, computational complexities, which has so far prevented the development of robust and reliable routines for such analysis, are studied and efficient remedies and solutions developed. Following are the steps taken towards development of these solutions: a new description for the topology of the multi-arm manipulator system resulting in an expression containing information about structure of individual arms; formulation of a unique Jacobian sub-matrix containing differential relations between joint rates and end effectors' velocities of the entire system irrespective of the topology; a new definition for performance evaluation of the manipulator system based on displacement of an entire body from one point to another; a new description for equations of motion based on Euler angles and their derivatives resulting in an exact solution for evaluation of deviation of end effectors between current and goal locations; and significant modifications for removing the manipulator system from a near-singular or hard to reach position.

Vahidi, Siamak

1992-07-01

444

Adaptive PD controller for robot manipulators  

Microsoft Academic Search

Referring to the point-to-point control problem, a proportional and derivative (PD) control algorithm is presented that is adaptive with respect to the gravity parameters of robot manipulators. The proposed controller is shown to be globally convergent. Following the same approach, an application to the tracking problem is also presented. Simulation tests are included, with reference to a robot having three

Patrizio Tomei

1991-01-01

445

Acoustic Levitation and Manipulation for Space Applications  

Microsoft Academic Search

A wide spectrm of experiments to be performed in space in a microgravity environment require levitation and manipulation of liquid or molten samples. A novel acoustic method has been developed at JPL for controlling liquid samples without physical contacts. This method utilizes the static pressure generated by three orthogonal acoustic standing waves excited within an enclosure. Furthermore, this method will

Taylor G. Wang

1979-01-01

446

Cell signaling experiments driven by optical manipulation.  

PubMed

Cell signaling involves complex transduction mechanisms in which information released by nearby cells or extracellular cues are transmitted to the cell, regulating fundamental cellular activities. Understanding such mechanisms requires cell stimulation with precise control of low numbers of active molecules at high spatial and temporal resolution under physiological conditions. Optical manipulation techniques, such as optical tweezing, mechanical stress probing or nano-ablation, allow handling of probes and sub-cellular elements with nanometric and millisecond resolution. PicoNewton forces, such as those involved in cell motility or intracellular activity, can be measured with femtoNewton sensitivity while controlling the biochemical environment. Recent technical achievements in optical manipulation have new potentials, such as exploring the actions of individual molecules within living cells. Here, we review the progress in optical manipulation techniques for single-cell experiments, with a focus on force probing, cell mechanical stimulation and the local delivery of active molecules using optically manipulated micro-vectors and laser dissection. PMID:23698758

Difato, Francesco; Pinato, Giulietta; Cojoc, Dan

2013-04-25

447

Review: Genetic manipulation of the rodent placenta  

Microsoft Academic Search

The principal role of the placenta is the maintenance of pregnancy and promotion of fetal growth and viability. The use of transgenic rodents has greatly enhanced our understanding of placental development and function. However, embryonic lethality is often a confounding variable in determining whether a genetic modification adversely affected placental development. In these cases, it is beneficial to specifically manipulate

S. J. Renaud; M. A. Karim Rumi; M. J. Soares

2011-01-01

448

Dynamic analysis of geometrically nonlinear robot manipulators  

Microsoft Academic Search

In this paper, a method for the dynamic analysis of geometrically nonlinear elastic robot manipulators is presented. Robot arm elasticity is introduced using a finite element method which allows for the gross arm rotations. A shape function which accounts for the combined effects of rotary inertia and shear deformation is employed to describe the arm deformation relative to a selected

E. M. Bakp

1996-01-01

449

Local path modifications of heavy load manipulators  

Microsoft Academic Search

Motion control of the tool center point (TCP) of a heavy load manipulator can be realized with a virtual elastic band in the workspace of the TCP. In this paper we present an efficient method to modify the virtual elastic band, which enables it to react in real-time to local changes in the environment. The method is based on the

Eva Dyllong; Artur Komainda

2001-01-01

450

Programming and control of kinematically redundant manipulators  

Microsoft Academic Search

Because kinematically redundant robot manipulators have extra degrees of freedom with which to move and orient end effectors in the workspace, they offer a number of advantages over nonredundant designs. In this paper we show how extra degrees of freedom may be used to mitigate the problem of kinematically singular configurations. Programming and control techniques for resolution of redundancy are

John Baillieul; John Hollerbach; Roger Brockett

1984-01-01

451

Influencing audience satisfaction by manipulating expectations  

Microsoft Academic Search

Four studies examined whether people manipulate audience expectations about outcomes to influence audience satisfaction. Studies 1 and 2 revealed that waiting customers often receive overestimations of the time they must wait before they can speak to a customer service representative (Study 1) or receive a table at a restaurant (Study 2). Studies 3 and 4 revealed that restaurant staff members

James A. Shepperd; Kate Sweeny; Lisa C. Cherry

2007-01-01

452

Cooperative manipulation and transportation with aerial robots  

Microsoft Academic Search

In this paper we consider the problem of controlling multiple robots manipulating and transporting an object in three dimensions via cables. We develop robot configurations that ensure static equilibrium of the object at a desired pose while respecting bounded tension constraints. Workspace and stability considerations are discussed as well as the effects of actuation and sensing errors on the performance

Nathan Michael; Jonathan Fink; Vijay Kumar

2011-01-01

453

Magnetic nanosheets manipulation: Modeling, development and validation  

Microsoft Academic Search

Polymeric ultra-thin films, also called nanosheets, show peculiar properties in terms of thickness, flexibility and chemical structure. For these reasons, they were proposed as nanoplasters for localized drug release or as a new solution for closing endoluminal surgical wounds. This paper presents the fabrication and characterization of free-standing nanosheets loaded with iron oxide nanoparticles, which can be manipulated in liquid

Virgilio Mattoli; Edoardo Sinibaldi; Virginia Pensabene; Silvia Taccola; Arianna Menciassi; Paolo Dario

2010-01-01

454

Magnetic manipulation instrumentation for medical physics research  

Microsoft Academic Search

The noncontact magnetic manipulation of probe masses within the body is an area of research that has received substantial attention from the medical physics community, especially during the past three decades. The therapeutic and diagnostic possibilities arising from such technology include site-specific drug delivery within the central nervous system, advancement of techniques for navigation and selective catheterization of vessels within

G. T. Gillies; R. C. Ritter; W. C. Broaddus; M. S. Grady; M. A. Howard; R. G. McNeil

1994-01-01

455

Concurrent manipulation of binary search trees  

Microsoft Academic Search

The concurrent manipulation of a binary search tree is considered in this paper. The systems presented can support any number of concurrent processes which perform searching, insertion, deletion, and rotation (reorganization) on the tree, but allow any process to lock only a constant number of nodes at any time. Also, in the systems, searches are essentially never blocked. The concurrency

H. T. Kung; Philip L. Lehman

1980-01-01

456

Automatic camera tracking for remote manipulators  

SciTech Connect

The problem of automatic camera tracking of mobile objects is addressed with specific reference to remote manipulators and using either fixed or mobile cameras. The technique uses a kinematic approach employing 4 x 4 coordinate transformation matrices to solve for the needed camera PAN and TILT angles. No vision feedback systems are used, as the required input data are obtained entirely from position sensors from the manipulator and the camera-positioning system. All hardware requirements are generally satisfied by currently available remote manipulator systems with a supervisory computer. The system discussed here implements linear plus on/off (bang-bang) closed-loop control with a +-2/sup 0/ deadband. The deadband area is desirable to avoid operator seasickness caused by continuous camera movement. Programming considerations for camera control, including operator interface options, are discussed. The example problem presented is based on an actual implementation using a PDP 11/34 computer, a TeleOperator Systems SM-229 manipulator, and an Oak Ridge National Laboratory (ORNL) camera-positioning system. 3 references, 6 figures, 2 tables.

Stoughton, R.S.; Martin, H.L.; Bentz, R.R.

1984-04-01

457

Automatic camera tracking for remote manipulators  

SciTech Connect

The problem of automatic camera tracking of mobile objects is addressed with specific reference to remote manipulators and using either fixed or mobile cameras. The technique uses a kinematic approach employing 4 x 4 coordinate transformation matrices to solve for the needed camera PAN and TILT angles. No vision feedback systems are used, as the required input data are obtained entirely from position sensors from the manipulator and the camera-positioning system. All hardware requirements are generally satisfied by currently available remote manipulator systems with a supervisory computer. The system discussed here implements linear plus on/off (bang-bang) closed-loop control with a +-2-deg deadband. The deadband area is desirable to avoid operator seasickness caused by continuous camera movement. Programming considerations for camera control, including operator interface options, are discussed. The example problem presented is based on an actual implementation using a PDP 11/34 computer, a TeleOperator Systems SM-229 manipulator, and an Oak Ridge National Laboratory (ORNL) camera-positioning system. 3 references, 6 figures, 2 tables.

Stoughton, R.S.; Martin, H.L.; Bentz, R.R.

1984-07-01

458

Planning for Dexterous Manipulation with Sliding Contacts  

Microsoft Academic Search

Dexterous manipulation refers to the skillful execution of object reorienting and repositioning maneuvers, especially when performed within the grasp of an articulated mechani cal hand. In this paper we study the problem of gaining a secure and enveloping grasp of a two-dimensional object by exploiting sliding at the contacts between the object and the hand. This is done in two

Jeffrey C. Trinkle; Richard P. Paul

1990-01-01

459

Mapping virtual object manipulation to sound variation  

Microsoft Academic Search

We are studying the use of dexterous manipulation in a virtual environment to create, edit and perform sounds. In our Max\\/FTS-based experimental environment, a virtual object functions as input device for the editing of sound - the sound artist literally \\\\sculpts\\

Axel G. E. Mulder; S. Sidney Fels; Kenji Mase

1997-01-01

460

Reduction of turbulent drag: Boundary layer manipulators  

Microsoft Academic Search

The drag reduction on airbus profiles is investigated. External and internal boundary layer manipulators are applied. The wind tunnel wall geometry and the model surface geometry are modified, carving riblets in the sense of the main flow. The change induced in the flow are studied using hotwire anemometry and spectral analysis. Direct drag measurements on Airbus profiles indicate a drag

E. Coustols

1989-01-01

461

Turbulent friction drag reduction: Boundary layer manipulators  

Microsoft Academic Search

Internal manipulation by slant of thin longitudinal riblets is addressed experimentally in three dimensional flow. An ONERA D profile mounted between the lateral walls of a subsonic wind tunnel is maintained at an angle sweep of 22.5 degrees and at incidence 0 degrees. When the profile is recovered by different models of ribleted walls the variations on the drag coefficient

E. Coustols

1990-01-01

462

Nanofabrication, Nanoinstrumentation and Nanoassembly by Nanorobotic Manipulation  

Microsoft Academic Search

A nanolaboratory is proposed to realize the capabilities of nanofabrication, nanoinstrumentation and nanoassembly to make three-dimensional structures, devices and systems in the nanoworld. A nanorobotic manipulation system is introduced to realize these capabilities inside a scanning electron microscope or a transmission electron microscope. Some precursors are introduced into the small working space in the nanoworld, so that cutting, bending, peeling

Toshio Fukuda; Masahiro Nakajima; Pou Liu; Haitham Elshimy

2009-01-01

463

Controlled nanowire growth with a nanorobotic manipulator  

Microsoft Academic Search

In this paper we report that a single nanowire was successfully grown by controlling the distance between the emitter and substrates with a nanorobotic manipulator moving at a speed of 15 nm s-1. A tree-like nanowire was grown on the tip of an individual carbon nanotube (CNT) without interelectrode control. These nanowires were induced by field emission, with tungsten hexacarbonyl

Pou Liu; Fumihito Arai; Toshio Fukuda

2006-01-01

464

Fault Tree Analysis Using Bit Manipulation  

Microsoft Academic Search

This paper describes an efficient technique for computerized fault-tree analysis. The technique is based upon binary coding of events and bit manipulation for tree reduction, reducing both computation time and computer storage requirements. The operations include generation of minimal cut sets for trees containing arbitrary AND and OR logic, and determination of top event existence probability for s-independent minimal cut

Dean B. Wheeler; Jason S. Hsuan; Ralph R. Duersch; Glenn M. Roe

1977-01-01

465

Information Manipulation, Coordination, and Regime Change  

Microsoft Academic Search

This paper presents a model of information and political regime change. If enough citizens act against a regime, it is overthrown. Citizens are imperfectly informed about how hard this will be and the regime can, at a cost, engage in propaganda so that at face-value it seems hard. This coordination game with endogenous information manipulation has a unique equilibrium and

Chris Edmond

2011-01-01

466

Humanoid Teleoperation for Whole Body Manipulation  

Microsoft Academic Search

We present results of successful telemanipulation of large, heavy objects by a humanoid robot. Using a sin- gle joystick the operator controls walking and whole body manipulation along arbitrary paths for up to ten minutes of continuous execution. The robot grasps, walks, pushes, pulls, turns and re-grasps a 55kg range of loads on casters. Our telemanipulation framework changes reference frames

Mike Stilman; Koichi Nishiwaki; Satoshi Kagami

2008-01-01

467

Coordinated control of multiple manipulator systems  

Microsoft Academic Search

A scheme for controlling multimanipulator systems is presented. The control objective is to coordinate the manipulators to perform parts-matching tasks such as screwing a nut onto a bolt. The task of moving a rigid object can be treated as a special case. Two secondary control objectives, internal force control and load distribution, can be accomplished within the structure of the

Ping Hsu; Ping

1993-01-01

468

Elastic graphical interfaces to precise data manipulation  

Microsoft Academic Search

We propose an interaction technique for manipulating precisedata or selecting one element from a large number of items.Although conventional graphical interaction tools like sliderscannot be used for selecting more items than the pixel sizeof the slider, we can specify more precise data by using theelastic slider based on the rubber-band metaphor, where acontrol object can be moved by pulling the

Toshiyuki Masui; Kouichi Kashiwagi; George R. Borden IV

1995-01-01

469

Dynamic nonprehensile manipulation: Controllability, planning, and experiments  

SciTech Connect

The authors are interested in using low-degree-of-freedom robots to perform complex tasks by nonprehensile manipulation (manipulation without a form- or force-closure grasp). By not grasping, the robot can use gravitational, centrifugal, and Coriolis forces as virtual motors to control more degrees of freedom of the part. The part`s extra motion freedoms are exhibited as rolling, slipping, and free flight. This paper describes controllability, motion planning, and implementation of planar dynamic nonprehensile manipulation. The authors show that almost any planar object is controllable by point contact, and the controlling robot requires only two degrees of freedom (a point translating in the plane). They then focus on a one-joint manipulator (with a two-dimensional state space), and show that even this simplest of robots, by using slipping and rolling, can control a planar object to a full-dimensional subset of its six-0dimensional state space. The authors have developed a one-joint robot to perform a variety of dynamic tasks, including snatching an object from a table, rolling an object on the surface of the arm, and throwing and catching. Nonlinear optimization is used to plan robot trajectories that achieve the desired object motion via coupling forces through the nonprehensile contact.

Lynch, K.M. [Northwestern Univ., Evanston, IL (United States). Dept. of Mechanical Engineering; Mason, M.T. [Carnegie Mellon Univ., Pittsburgh, PA (United States). Robotics Inst.

1999-01-01

470

Physical human interaction for an inflatable manipulator  

Microsoft Academic Search

There is a growing need for robots that can function in close proximity to human beings and also physically interact with them safely. We believe inherent safety is extremely important for robots in human environments. Towards this end, we are exploring the use of inflatable structures for manipulators instead of traditional rigid structures, to improve safety in physical human robot

Siddharth Sanan; Michael H. Ornstein; Christopher G. Atkeson

2011-01-01

471

Manipulator compliance based on joint torque control  

Microsoft Academic Search

The application of robot manipulators to batch manufacturing product assembly requires the control and monitoring of both robot force and position. A good force sensing technique is imperative to increase the robot's capabilities in this area. A fast reliable force servo system based on the proper sensing technique is also needed to increase the speed of robot operations. This paper

Chi-haur Wu; Richard P. Paul

1980-01-01

472

Redundancy resolution of manipulators through torque optimization  

Microsoft Academic Search

Methods for resolving kinematic redundancies of manipulators by the effect on joint torque are examined. When the generalized inverse is formulated in terms of accelerations and incorporated into the dynamics, the effect of redundancy resolution on joint torque can be directly reflected. One method chooses the joint acceleration null-space vector to minimize joint torque in a least squares sense; when

J. Hollerbach; Ki Suh

1987-01-01

473

DUAL SITE CATALYSTS FOR HYDRIDE MANIPULATION  

Microsoft Academic Search

This comment describes our efforts to develop dual site catalysts for hydride manipulation. We began by analyzing the mechanism of alcohol oxidation with the ruthenium-based Shvo catalyst, which utilizes a proton transfer to template a hydride transfer from carbon to ruthenium in a single transition state. In our project we are working to extend this concept of reactivity from the

Brian L. Conley; Travis J. Williams

2011-01-01

474

Adaptive Control Scheme for a Flexible Manipulator.  

National Technical Information Service (NTIS)

The problem of controlling a single link flexible manipulator is considered. A self-tuning adaptive control scheme is proposed which consists of a least squares on-line parameter identification of an equivalent linear model followed by a tuning of the gai...

T. C. Yang J. C. S. Yang P. Kudva

1987-01-01

475

Genetic manipulation: Impact on man and society  

SciTech Connect

This book contains 23 selections. Some of the titles are: Transitory Recombination Between Phage and Plasmid Genomes; Gene Cloning and Bacterial Pathogenicity; Sequence Organization of the Vertebrate Genome; Retroviruses and Mammalian Development; Chromosome Translocations and Oncogene Activation; and Genetic Manipulation of Drosophila with Transposable P Elements.

Arber, W.; Illmensee, K.; Peacock, W.J.; Starlinger, P.

1984-01-01

476

Transferability of economic evaluations of medical technologies: a new technology for orthopedic surgery.  

PubMed

Transferring results of economic evaluations across countries or jurisdictions can potentially save scarce evaluation resources while helping to make market access and reimbursement decisions in a timely fashion. This article points out why transferring results of economic evaluations is particularly important in the field of medical technologies. It then provides an overview of factors that are previously identified in the literature as affecting transferability of economic evaluations, as well as methods for transferring results in a scientifically sound way. As the current literature almost exclusively relates to transferability of pharmacoeconomic evaluations, this article highlights those factors and methodologies that are of particular relevance to transferring medical technology assessments. Considering the state-of-the-art literature and a worked, real life, example of transferring an economic evaluation of a product used in orthopedic surgery, we provide recommendations for future work in this important area of medical technology assessment. PMID:18452383

Steuten, Lotte; Vallejo-Torres, Laura; Young, Terry; Buxton, Martin

2008-05-01

477