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https://www.readbyqxmd.com/read/28820842/-upper-extremity-innervation-patterns-and-clinical-implications-for-nerve-and-tendon-transfer
#1
Ellen Y Lee, Sandeep J Sebastin, Andre Cheah, V P Kumar, Aymeric Y T Lim
BACKGROUND: We previously studied the intramuscular innervation of 150 upper limb muscles and demonstrated that certain patterns of intramuscular innervation allowed muscles to be split into compartments with independent function. This study aims to determine the location, extra-muscular course, and number of motor nerve branches of upper limb peripheral nerves. We want to combine this information with our previous work to create a blueprint of upper limb neuromuscular anatomy that would be useful in reconstructive surgery...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28819879/lower-extremity-bypass-using-bovine-carotid-artery-graft-artegraft-an-analysis-of-124-cases-with-long-term-results
#2
Philip Lindsey, Angela Echeverria, Mathew Cheung, Elias Kfoury, Carlos F Bechara, Peter H Lin
INTRODUCTION: Although biological grafts have been utilized as a vascular conduit in leg bypass for many years, reports of a bovine carotid artery graft (BCAG) in lower extremity revascularization have been scarce. This study analyzed the outcome of lower leg bypass using BCAG. METHODS: A retrospective review of a prospectively collected database of all patients undergoing lower extremity bypass using BCAG from 2002 to 2017 was performed. Clinical outcomes including graft patency and limb salvage were evaluated...
August 17, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28819822/endovascular-aneurysm-repair-with-balloon-thrombectomy-for-acute-thrombosis-of-abdominal-aortic-aneurysm
#3
Kensuke Uotani, Akihiro Hamanaka, Keigo Matsushiro, Erika Idaka, Kiyo Ito, Yuko Yamasaki, Takeyuki Kushima, Takaki Sugimoto, Koji Sugimoto
Acute occlusion of abdominal aortic aneurysm (AAA) is a rare complication and is usually treated with surgical reconstruction. We present a case of acute AAA occlusion that was successfully treated by endovascular aneurysm repair (EVAR) with Fogarty balloon thrombectomy. A 77-year-old man with a history of acute myocardial ischemia presented with limb weakness and coldness. Contrast-enhanced computed tomography showed a 42-mm-diameter infrarenal AAA that was completely thrombosed in the distal portion. The proximal neck of the aneurysm was patent, and its shape was suitable for EVAR...
August 17, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28817162/determining-when-it-is-safe-to-remove-the-external-fixator-results-from-a-survey-of-the-limb-lengthening-and-reconstruction-society
#4
Christopher A Iobst, Waleed Mohammed, Ryan Colley
Thousands of external fixators are applied for distraction osteogenesis each year. Determining when it is safe to remove the fixator can be difficult. The purpose of this study was to survey an international group of external fixation surgeons to determine their current practice patterns surrounding external fixator removal. A 10-question, open-ended survey was emailed to members of the Limb Lengthening and Reconstruction Society. Responses were recorded, and statistical analysis was performed. Pearson's chi-square test and likelihood ratio were used when indicated...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28815378/effect-of-aging-on-mechanical-stresses-deformations-and-hemodynamics-in-human-femoropopliteal-artery-due-to-limb-flexion
#5
Anastasia Desyatova, Jason MacTaggart, Rodrigo Romarowski, William Poulson, Michele Conti, Alexey Kamenskiy
Femoropopliteal artery (FPA) reconstructions are notorious for poor clinical outcomes. Mechanical and flow conditions that occur in the FPA with limb flexion are thought to play a significant role, but are poorly characterized. FPA deformations due to acute limb flexion were quantified using a human cadaver model and used to build a finite element model that simulated surrounding tissue forces associated with limb flexion-induced deformations. Strains and intramural principal mechanical stresses were determined for seven age groups...
August 16, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28814021/simultaneous-estimation-of-human-and-exoskeleton-motion-a-simplified-protocol
#6
M T Alvarez, D Torricelli, A J Del-Ama, D Pinto, J Gonzalez-Vargas, J C Moreno, A Gil-Agudo, J L Pons
Adequate benchmarking procedures in the area of wearable robots is gaining importance in order to compare different devices on a quantitative basis, improve them and support the standardization and regulation procedures. Performance assessment usually focuses on the execution of locomotion tasks, and is mostly based on kinematic-related measures. Typical drawbacks of marker-based motion capture systems, gold standard for measure of human limb motion, become challenging when measuring limb kinematics, due to the concomitant presence of the robot...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28807380/reconstruction-after-osteomyelitis-of-the-midfoot-from-high-pressure-washer-injury
#7
Matthew M Reiner, Wissam E Khoury, Audley Mackel, Duane J Ehredt, Mark C Razzante
Reports of ballistic injures to the extremities typically include those involving gunshot wounds. However, high-pressure washer injuries frequently lead to equally damaging injuries. These injuries should not be overlooked, because they can result in high morbidity and complication rates. Similar to the open fracture protocol, these injuries require prompt debridement and irrigation with administration of antibiotics to avoid limb loss. The present case report identified a delay in the treatment protocol that left limited options for the patient...
August 11, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28803644/surgical-experience-and-the-practice-of-pancreatoduodenectomy
#8
Gregory T Kennedy, Matthew T McMillan, Laura Maggino, Michael H Sprys, Charles M Vollmer
BACKGROUND: Experienced surgeons demonstrate improved pancreatoduodenectomy outcomes, but little is known about what distinguishes their practice. Furthermore, the concept of experience has been variably interpreted in the surgical literature. We investigated how 4 interpretations of experience influence pancreatoduodenectomy management decisions. METHODS: A survey assessing pancreatoduodenectomy practice patterns was distributed by 6 surgical societies. Regression analysis identified behaviors associated with 4 forms of experience: years in practice, surpassing the learning curve (≥50 pancreatoduodenectomies), high annual volume (≥25 pancreatoduodenectomy/year), and high career volume (>200 pancreatoduodenectomy)...
August 10, 2017: Surgery
https://www.readbyqxmd.com/read/28802083/phase-contrast-hard-x-ray-microscopy-using-synchrotron-radiation-for-the-properties-of-skeletal-muscle-in-mouse-hind-limbs
#9
Sanghun Jang, Jaehong Lim, Onseok Lee
Radiation beam interface contrast X-ray microscopy provides resolution of a few dozen nanometers from fixed whole muscle biopsies, allowing better reconstruction of the microstructure of the muscle than is currently possible with classic histological techniques. Fixed soleus muscle biopsies have been evaluated from the walk-in mouse model using phase-contrast X-ray microscopy, and results presented that corroborate the accuracy of the method used, and its potential for application in physiotherapy and occupational therapy studies...
August 12, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28801704/no-clinical-differences-between-anteromedial-portal-and-transtibial-technique-for-femoral-tunnel-positioning-in-anterior-cruciate-ligament-reconstruction-a-prospective-randomized-controlled-trial
#10
Peter MacDonald, Chris Kim, Sheila McRae, Jeff Leiter, Ryan Khan, Daniel Whelan
PURPOSE: The anteromedial (AMP) portal technique was introduced to position the femoral tunnel in anterior cruciate ligament (ACL) reconstruction to more closely replicate the original ACL footprint compared to the transtibial (TT) approach. Few randomized trials have evaluated differences in these techniques with respect to clinical outcomes. The purpose of this study was to determine if there are any differences in clinical outcome between the AMP and TT approaches. METHODS: This is a single-blinded, prospective, randomized controlled trial...
August 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28801079/re-raising-muscle-flaps-a-randomised-controlled-animal-study
#11
K Bradshaw, M Wagels
BACKGROUND: In the experience of our centre, 33% of reconstructed compound lower limb injuries will need an orthopaedic revision.(1) A flap may be re-raised through numerous methods, and historically, the approach of choice has been based on the principle of protecting the vascular pedicle rather than the inset. Our aim was to determine whether a marginal versus a split approach to re-raising inferred a higher risk of flap necrosis and whether more attention should be paid to protecting the inset of the flap, particularly at the distal portion...
July 18, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28800252/progressive-changes-in-walking-kinematics-and-kinetics-after-anterior-cruciate-ligament-injury-and-reconstruction-a-review-and-meta-analysis
#12
Lindsay V Slater, Joseph M Hart, Adam R Kelly, Christopher M Kuenze
CONTEXT:   Anterior cruciate ligament (ACL) injury and ACL reconstruction (ACLR) result in persistent alterations in lower extremity movement patterns. The progression of lower extremity biomechanics from the time of injury has not been described. OBJECTIVE:   To compare the 3-dimensional (3D) lower extremity kinematics and kinetics of walking among individuals with ACL deficiency (ACLD), individuals with ACLR, and healthy control participants from 3 to 64 months after ACLR...
August 11, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28799988/preoperative-assessment-for-complex-lower-limb-deformity
#13
Leo Donnan
Successful limb reconstruction surgery not only relies on surgical skill but probably more on assessment and planning before intervention. A clear appreciation of the child as a whole, an understanding of natural history and the ability to carefully evaluate the patient clinically are key to successful treatment. The appropriate use of investigations and the ability to analyze, plan and execute a treatment plan is challenging and requires experience and training. This paper outlines some of the steps required to assess the patient with a complex limb deformity...
September 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28780107/validation-of-2-noninvasive-markerless-reconstruction-techniques-in-biplane-high-speed-fluoroscopy-for-3-dimensional-research-of-bovine-distal-limb-kinematics
#14
M Weiss, E Reich, S Grund, C K W Mülling, S M Geiger
Lameness severely impairs cattle's locomotion, and it is among the most important threats to animal welfare, performance, and productivity in the modern dairy industry. However, insight into the pathological alterations of claw biomechanics leading to lameness and an understanding of the biomechanics behind development of claw lesions causing lameness are limited. Biplane high-speed fluoroscopic kinematography is a new approach for the analysis of skeletal motion. Biplane high-speed videos in combination with bone scans can be used for 3-dimensional (3D) animations of bones moving in 3D space...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28780005/the-role-of-the-periosteal-sleeve-in-the-reconstruction-of-bone-defects-using-a-non-vascularised-fibula-graft-in-the-pediatric-population
#15
N Christina Steiger, Pierre Journeau, Pierre Lascombes
BACKGROUND: Following resection of large benign bone tumors surgeons are confronted with bone defects severely affecting the stability of a limb. To restore the mechanical continuity of the bone different treatment methods using bone grafts have been described. In pediatric patients the thick periosteal sleeve is thought to contribute to bone formation. HYPOTHESIS: An intact periosteal sleeve is crucial in bone remodelling around a non-vascularised fibular graft used to bridge large bone defects...
August 2, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28777416/ultrasound-guided-intravenous-catheter-insertion-in-a-prone-patient-using-a-t-probe-in-emergency-setting
#16
Antonio Lazzari, Roberto Bini, Roberto Bertucci, Antonio Coletti, Paolo Voghera
INTRODUCTION: Central venous catheterizations are common intraoperative procedures.Central venous catheter (CVC) placements are usually performed with patients lying in the supine position using real-time ultrasound (US) guidance. CASE DESCRIPTION: A 43-year-old man underwent open right popliteal artery reconstruction in the prone position for a limb-threatening injury. Excessive continuous intraoperative bleeding, increased by a coexisting pelvic fracture, was temporarily stabilized by a T POD device, but with the need of external fixation, required the placement of CVC, which was not feasible whilst in the prone position without US help...
July 26, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28777285/3d-modeling-of-lower-extremities-with-biplanar-radiographs-reliability-of-measures-on-subsequent-examinations
#17
David E Westberry, Ashley M Carpenter
BACKGROUND: Biplanar radiography with 3-dimensional (3D) modeling (EOS) provides a comprehensive assessment of lower limb alignment in an upright weight-bearing position with less radiation than conventional radiography. A study was performed to assess the consistency and reliability of 2 lower extremity 3D biplanar radiograph models created at least 1 year apart in a pediatric population. METHODS: All patients who had 2 lower extremity radiographic evaluations with EOS performed at visits a minimum of 1 year apart were reviewed...
August 2, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28776029/genome-wide-signatures-of-complex-introgression-and-adaptive-evolution-in-the-big-cats
#18
Henrique V Figueiró, Gang Li, Fernanda J Trindade, Juliana Assis, Fabiano Pais, Gabriel Fernandes, Sarah H D Santos, Graham M Hughes, Aleksey Komissarov, Agostinho Antunes, Cristine S Trinca, Maíra R Rodrigues, Tyler Linderoth, Ke Bi, Leandro Silveira, Fernando C C Azevedo, Daniel Kantek, Emiliano Ramalho, Ricardo A Brassaloti, Priscilla M S Villela, Adauto L V Nunes, Rodrigo H F Teixeira, Ronaldo G Morato, Damian Loska, Patricia Saragüeta, Toni Gabaldón, Emma C Teeling, Stephen J O'Brien, Rasmus Nielsen, Luiz L Coutinho, Guilherme Oliveira, William J Murphy, Eduardo Eizirik
The great cats of the genus Panthera comprise a recent radiation whose evolutionary history is poorly understood. Their rapid diversification poses challenges to resolving their phylogeny while offering opportunities to investigate the historical dynamics of adaptive divergence. We report the sequence, de novo assembly, and annotation of the jaguar (Panthera onca) genome, a novel genome sequence for the leopard (Panthera pardus), and comparative analyses encompassing all living Panthera species. Demographic reconstructions indicated that all of these species have experienced variable episodes of population decline during the Pleistocene, ultimately leading to small effective sizes in present-day genomes...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28762500/myology-of-the-forelimb-of-majungasaurus-crenatissimus-theropoda-abelisauridae-and-the-morphological-consequences-of-extreme-limb-reduction
#19
Sara H Burch
Forelimb reduction occurred independently in multiple lineages of theropod dinosaurs. Although tyrannosaurs are renowned for their tiny, two-fingered forelimbs, the degree of their reduction in length is surpassed by abelisaurids, which possess an unusual morphology distinct from that of other theropods. The forelimbs of abelisaurids are short but robust and exhibit numerous crests, tubercles, and scars that allow for inferences of muscle attachment sites. Phylogenetically based reconstructions of the musculature were used in combination with close examination of the osteology in the Malagasy abelisaurid Majungasaurus to create detailed muscle maps of the forelimbs, and patterns of the muscular and bony morphology were compared with those of extant tetrapods with reduced or vestigial limbs...
August 1, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28753228/use-of-arterialized-saphenous-vein-venous-flow-through-flaps-as-a-temporizing-measure-for-hand-salvage-in-contaminated-wounds-presenting-with-limb-ischemia-a-case-series
#20
Julian Diaz-Abele, Bauback Safa, Rudolf F Buntic, Avinash Islur
BACKGROUND: Vascular injuries resulting in limb ischemia are traditionally treated acutely with autologous or prosthetic bypass grafts. Traumatic contaminated injuries with soft tissue and vascular segmental loss are challenging as prosthetic bypasses are at risk of erosion, infection, and occlusion; and autologous bypasses are at risk of desiccation, blow-out, infection, and clotting. We propose a novel approach to these injuries by using arterialized saphenous vein venous flow-through free flaps (S-VFTF) as an autologous bypass, and present the results of its application in a series of cases...
July 28, 2017: Microsurgery
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