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Motion analysis

Bradley Genovese, Steven Yin, Sohail Sareh, Michael DeVirgilio, Laith Mukdad, Jessica Davis, Veronica J Santos, Peyman Benharash
With changes in work hour limitations, there is an increasing need for objective determination of technical proficiency. Electromagnetic hand-motion analysis has previously shown only time to completion and number of movements to correlation with expertise. The present study was undertaken to evaluate the efficacy of hand-motion-tracking analysis in determining surgical skill proficiency. A nine-degree-of-freedom sensor was used and mounted on the superior aspect of a needle driver. A one-way analysis of variance and Welch's t test were performed to evaluate significance between subjects...
October 2016: American Surgeon
Jason Ostenson, Akshat C Pujara, Artem Mikheev, Linda Moy, Sungheon G Kim, Amy N Melsaether, Komal Jhaveri, Sylvia Adams, David Faul, Christopher Glielmi, Christian Geppert, Thorsten Feiweier, Kimberly Jackson, Gene Y Cho, Fernando E Boada, Eric E Sigmund
PURPOSE: Diffusion-weighted imaging (DWI) and (18) F-fluorodeoxyglucose-positron emission tomography ((18) F-FDG-PET) independently correlate with malignancy in breast cancer, but the relationship between their structural and metabolic metrics is not completely understood. This study spatially correlates diffusion, perfusion, and glucose avidity in breast cancer with simultaneous PET/MR imaging and compares correlations with clinical prognostics. METHODS: In this Health Insurance Portability and Accountability Act-compliant prospective study, with written informed consent and approval of the institutional review board and using simultaneously acquired FDG-PET and DWI, tissue diffusion (Dt ), and perfusion fraction (fp ) from intravoxel incoherent motion (IVIM) analysis were registered to FDG-PET within 14 locally advanced breast cancers...
October 25, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Jayanth Sridhar, Yoshihiro Yonekawa, Ajay E Kuriyan, Anthony Joseph, Benjamin J Thomas, Michelle C Liang, Nadim Rayess, Nidhi Relhan, Jeremy D Wolfe, Chirag P Shah, Andre J Witkin, Harry W Flynn, Sunir J Garg
PURPOSE: To report the clinical presentation, microbiologic spectrum, and visual outcomes associated with acute-onset infectious endophthalmitis undergoing therapeutic pars plana vitrectomy. METHODS: Multicenter interventional retrospective noncomparative consecutive case series. Billing records were reviewed to identify all charts for patients undergoing pars plana vitrectomy within 14 days of diagnosis of acute-onset infectious endophthalmitis over a 4-year period at 5 large tertiary referral retina practices...
October 21, 2016: Retina
Behnoosh Parsa, Vladimir M Zatsiorsky, Mark L Latash
We address the nature of unintentional changes in performance in two papers. This second paper tested hypotheses related to stability of task-specific performance variables estimated using the framework of the uncontrolled manifold (UCM) hypothesis. Our first hypothesis was that selective stability of performance variables would be observed even when the magnitudes of those variables drifted unintentionally because of the lack of visual feedback. Our second hypothesis was that stability of a variable would depend on the number of explicit task constraints...
October 24, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Philipp Hahn, Andreas Lamprecht, Jurg Dual
We present the first numerical simulation setup for the calculation of the acoustic viscous torque on arbitrarily shaped micro-particles inside general acoustic fields. Under typical experimental conditions, the particle deformation plays a minor role. Therefore, the particle is modeled as a rigid body which is free to perform any time-harmonic and time-averaged translation and rotation. Applying a perturbation approach, the viscoacoustic field around the particle is resolved to obtain the time-averaged driving forces for a subsequent acoustic streaming simulation...
October 25, 2016: Lab on a Chip
L Reissner, K Böttger, H J Klein, M Calcagni, T Giesen
Range of motion and stability are important outcome parameters to assess function of the distal radioulnar joint (DRUJ), in particular pronation, supination, and weight-lifting capacity. The DRUJ semiconstrained implant developed by Scheker et al is intended to reproduce all the functions of the triangular fibrocartilage complex and the DRUJ. The aim of the study was to investigate the subjective, clinical, and radiographic results in 10 patients after primary implantation of the semiconstrained DRUJ arthroplasty following DRUJ derangement and painful instability, with an average follow-up of 3 years with a special focus on the complications...
November 2016: Journal of Wrist Surgery
Mireia Esplugas, Alex Lluch-Bergada, Nathalie Mobargha, Manuel Llusa-Perez, Elisabet Hagert, Marc Garcia-Elias
Purpose In the presence of early osteoarthritis, changes to the trapeziometacarpal joint (TMJ) often result in pain and is associated with joint instability and a tendency of dorsoradial subluxation. In these instances, arthroscopy may be indicated to: (1) assess the extent of cartilage disease and the laxity of ligaments and to (2) treat TMJ instability. The purpose of our study was to biomechanically analyze which ligaments are the primary stabilizers of the TMJ. Methods Overall, 11 fresh-frozen human cadaver specimens were dissected and attached to a testing device with the thumb positioned in neutral abduction, neutral flexion, and neutral opposition...
November 2016: Journal of Wrist Surgery
Daniel Collado-Mateo, J C Adsuar, F J Dominguez-Muñoz, P R Olivares, N Gusi
BACKGROUND: Fibromyalgia is associated with a reduction in the ability to perform activities of daily living (ADL). Sit-to-stand-to-sit performance is one of the most common ADL and is often evaluated by counting the number of repetitions of the 30 s chair-stand test. However, no study has examined the performance over the 30 s of this test by female fibromyalgia patients on a phase-by-phase basis. OBJECTIVE: To evaluate the impact of fibromyalgia on performance of the 30 s chair-stand test and to analyze how the kinematic performance changed over the 30 s test period...
October 21, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
Y Ozaki, Y Homma, K Sano, T Baba, H Ochi, A Desroches, M Matsumoto, T Yuasa, K Kaneko
INTRODUCTION: Lateral femoral cutaneous nerve (LFCN) injury is a risk specific to the direct anterior approach (DAA) for total hip arthroplasty (THA). However, prevention strategies have not been established. This study aimed to identify the predisposing factors determining LFCN injury during THA via a DAA. HYPOTHESIS: Patients with LFCN injury after THA via DAA would demonstrate predisposing factors. MATERIAL AND METHODS: LFCN injury was identified using a patient questionnaire...
October 21, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
Bin Hu, Yunlin Chen, Hanxiao Zhu, Haobo Wu, Shigui Yan
BACKGROUND: With the introduction of new fixation systems and designs, there has been a recent reemergence of interest in cementless fixation of the tibial component in total knee arthroplasty. However, little is known regarding the clinical features and survivorship of the cementless porous tantalum monoblock tibial component compared to the conventional cemented modular tibial component. METHODS: We conducted a literature search of multiple databases for comparative studies published before June 2015 that investigated the outcomes of cementless porous tantalum monoblock tibia vs conventional cemented modular tibia...
September 28, 2016: Journal of Arthroplasty
Andreas Boss, Borna Barth, Lukas Filli, David Kenkel, Moritz C Wurnig, Marco Piccirelli, Caecilia S Reiner
PURPOSE: To optimize and test a diffusion-weighted imaging (DWI) echo-planar imaging (EPI) sequence with simultaneous multi-slice (SMS) excitation in the liver and pancreas regarding acquisition time (TA), number of slices, signal-to-noise ratio (SNR), image quality (IQ), apparent diffusion coefficient (ADC) quantitation accuracy, and feasibility of intravoxel incoherent motion (IVIM) analysis. MATERIALS AND METHODS: Ten healthy volunteers underwent DWI of the upper abdomen at 3T...
November 2016: European Journal of Radiology
Arash Haghikia, Philipp Röntgen, Jens Vogel-Claussen, Johannes Schwab, Ralf Westenfeld, Philipp Ehlermann, Dominik Berliner, Edith Podewski, Denise Hilfiker-Kleiner, Johann Bauersachs
AIMS: Peripartum cardiomyopathy (PPCM) is a major cause of acute heart failure in the peripartum period and considered potentially life threatening. While many aspects of its clinical profiles have been frequently reported, functional analysis, in particular of the right ventricle, and tissue characterization by cardiovascular magnetic resonance (CMR) imaging have been only sporadically described. The aim of the present study was to analyse pathological alterations and their prognostic relevance found in CMR imaging of patients newly diagnosed with PPCM...
December 2015: ESC Heart Failure
Tijana R Djukic, Swapna Karthik, Igor Saveljic, Valentin Djonov, Nenad Filipovic
Due to the important biological role of red blood cells (RBCs) in vertebrates, the analysis of reshaping and dynamics of RBCs motion is a critical issue in physiology and biomechanics. In this paper the behavior of RBCs within the immature capillary plexus during embryonic development of zebrafish has been analyzed. Relying on the fact that zebrafish embryos are small and optically transparent, it is possible to image the blood flow. In this way the anatomy of blood vessels is monitored along with the circulation throughout their development...
2016: Frontiers in Physiology
Preeti Raghavan, Daniel Geller, Nina Guerrero, Viswanath Aluru, Joseph P Eimicke, Jeanne A Teresi, Gbenga Ogedegbe, Anna Palumbo, Alan Turry
: Stroke is a leading cause of disability worldwide. It leads to a sudden and overwhelming disruption in one's physical body, and alters the stroke survivors' sense of self. Long-term recovery requires that bodily perception, social participation and sense of self are restored; this is challenging to achieve, particularly with a single intervention. However, rhythmic synchronization of movement to external stimuli facilitates sensorimotor coupling for movement recovery, enhances emotional engagement and has positive effects on interpersonal relationships...
2016: Frontiers in Human Neuroscience
P Metais, P Clavert, J Barth, P Boileau, R Broszka, G Nourissat, J Leuzinger, G Walch, L Lafosse
BACKGROUND: The Latarjet-Patte procedure consisting in transfer and screw fixation of the coracoid process to the anterior glenoid is a treatment of reference for anterior shoulder instability. Over time, surgical innovations translated into a number of improvements and, in late 2003, an arthroscopically assisted variant of the procedure was described. OBJECTIVE: To evaluate and compare clinical outcomes of the modified Latarjet-Patte procedure performed by open surgery, arthroscopy with screw fixation, or arthroscopy with endobutton fixation...
October 19, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
Ananth Kidambi, Manish Motwani, Akhlaque Uddin, David P Ripley, Adam K McDiarmid, Peter P Swoboda, David A Broadbent, Tarique Al Musa, Bara Erhayiem, Joshua Leader, Pierre Croisille, Patrick Clarysse, John P Greenwood, Sven Plein
OBJECTIVES: In the setting of reperfused acute myocardial infarction (AMI), the authors sought to compare prediction of contractile recovery by infarct extracellular volume (ECV), as measured by T1-mapping cardiac magnetic resonance (CMR), with late gadolinium enhancement (LGE) transmural extent. BACKGROUND: The transmural extent of myocardial infarction as assessed by LGE CMR is a strong predictor of functional recovery, but accuracy of the technique may be reduced in AMI...
October 18, 2016: JACC. Cardiovascular Imaging
Allison L Clouthier, Eric R Bohm, John F Rudan, Barbara L Shay, Michael J Rainbow, Kevin J Deluzio
Multicentre studies are rare in three dimensional motion analyses due to challenges associated with combining waveform data from different centres. Principal component analysis (PCA) is a statistical technique that can be used to quantify variability in waveform data and identify group differences. A correction technique based on PCA is proposed that can be used in post processing to remove nuisance variation introduced by the differences between centres. Using this technique, the waveform bias that exists between the two datasets is corrected such that the means agree...
October 13, 2016: Gait & Posture
Ming-Jie Kuang, Chao Han, Jian-Xiong Ma, Fei Li, Jie Zhao, Lin Fu, Xin-Long Ma
PURPOSE: Autologous platelet gel, developed from fresh autologous blood, is a breakthrough in the promotion and acceleration of soft tissue and bone repair. The application of autologous platelet gel has been reported to improve haemostasis and promote function recovery. We screened the randomized controlled trials and controlled clinical trials of high quality to investigate whether autologous platelet gel makes a better performance for postoperative bleeding and functional recovery in patients after total knee arthroplasty...
October 19, 2016: International Journal of Surgery
Nabia S Ikram, Judy Yee, Stefanie Weinstein, Benjamin M Yeh, Carlos U Corvera, Alexander Monto, Thomas A Hope
PURPOSE: To establish if triple-phase arterial imaging improves the detection of arterial phase hyperintense lesions based on arterial phase capture, motion artifact degradation, and lesion enhancement when compared to single-phase imaging. MATERIALS AND METHODS: Patients at risk for hepatocellular carcinoma were imaged at 3.0T. Seventy-three consecutive patients with a standard single-phase MRI and eighty-five consecutive patients were imaged using extracellular contrast with triple arterial phase MRI using three sequential accelerated acquisitions of 8 s...
October 21, 2016: Abdominal Radiology
Jasper Stevens, Kenneth Meijer, Wouter Bijnens, Mathijs C H W Fuchs, Lodewijk W van Rhijn, Joris P S Hermus, Sander van Hoeve, Martijn Poeze, Adhiambo M Witlox
BACKGROUND: Arthrodesis of the first metatarsophalangeal (MTP1) joint is an intervention often used in patients with severe MTP1 joint osteoarthritis and relieves pain in approximately 80% of these patients. The kinematic effects and compensatory mechanism of the foot for restoring a more normal gait pattern after this intervention are unknown. The aim of this study was to clarify this compensatory mechanism, in which it was hypothesized that the hindfoot and forefoot would be responsible for compensation after an arthrodesis of the MTP1 joint...
October 21, 2016: Foot & Ankle International
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