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https://www.readbyqxmd.com/read/29235055/a-finite-element-model-to-assess-transtibial-prosthetic-sockets-with-elastomeric-liners
#1
John C Cagle, Per G Reinhall, Kate J Allyn, Jake McLean, Paul Hinrichs, Brian J Hafner, Joan E Sanders
People with transtibial amputation often experience skin breakdown due to the pressures and shear stresses that occur at the limb-socket interface. The purpose of this research was to create a transtibial finite element model (FEM) of a contemporary prosthesis that included complete socket geometry, two frictional interactions (limb-liner and liner-socket), and an elastomeric liner. Magnetic resonance imaging scans from three people with characteristic transtibial limb shapes (i.e., short-conical, long-conical, and cylindrical) were acquired and used to develop the models...
December 13, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29227579/obesity-type-2-diabetes-increases-inflammation-periosteal-reactive-bone-formation-and-osteolysis-during-staphylococcus-aureus-implant-associated-bone-infection
#2
Christopher W Farnsworth, Eric M Schott, Abigail M Benvie, Jacob Zukoski, Stephen L Kates, Edward M Schwarz, Steven R Gill, Michael J Zuscik, Robert A Mooney
Obese and type 2 diabetic (T2D) patients have a 5-fold increased rate of infection following placement of an indwelling orthopaedic device. Though implant infections are associated with inflammation, periosteal reactive bone formation and osteolysis, the effect of obesity/T2D on these complicating factors has not been studied. To address this question, C57BL/6J mice were fed a high fat diet (60% Kcal from fat) to induce obesity/T2D, or a control diet (10% Kcal from fat) for three months, and challenged with a transtibial pin coated with a bioluminescent USA300 strain of S...
December 11, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29217090/walking-speed-differentially-alters-spinal-loads-in-persons-with-traumatic-lower-limb-amputation
#3
Brad D Hendershot, Iman Shojaei, Julian C Acasio, Christopher L Dearth, Babak Bazrgari
Persons with lower limb amputation (LLA) perceive altered motions of the trunk/pelvis during activities of daily living as contributing factors for low back pain. When walking (at a singular speed), larger trunk motions among persons with vs. without LLA are associated with larger spinal loads; however, modulating walking speed is necessary in daily life and thus understanding the influences of walking speed on spinal loads in persons with LLA is of particular interest here. Three-dimensional trunk-pelvic kinematics, collected during level-ground walking at self-selected (SSW) and two controlled speeds (∼1...
November 28, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29189882/the-transportal-technique-shows-better-clinical-results-than-the-transtibial-techniques-for-single-bundle-anterior-cruciate-ligament-reconstruction
#4
Kyung-Han Ro, Hyun-Jung Kim, Dae-Hee Lee
PURPOSE: Although anatomical and independent drilling techniques, such as transportal (TP) technique, have become more popular in anterior cruciate ligament (ACL) reconstruction, the TP technique has not been shown to yield superior clinical or functional outcomes compared to the transtibial (TT) technique. The aim of the current meta-analysis was to compare clinical outcomes of the TP and TT techniques, as determined by patient-reported outcome scores and knee joint laxity tests. It was hypothesized that the TP and TT techniques of ACL reconstruction would yield similar patient-reported functional outcomes and similar results on knee joint laxity tests...
November 30, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29183645/survivorship-analysis-and-clinical-outcomes-of-transtibial-pullout-repair-for-medial-meniscus-posterior-root-tears-a-5-to-10-year-follow-up-study
#5
Kyu Sung Chung, June Mo Noh, Jeong Ku Ha, Ho Jong Ra, Sung Bae Park, Hyung Kook Kim, Jin Goo Kim
PURPOSE: This study investigated the clinical outcomes and mid- to long-term survival rates in patients undergoing transtibial pullout repair of medial meniscus posterior root tears (MMPRTs) after a minimum follow-up of 5 years. METHODS: Between 2005 and 2011, patients with MMPRTs who had been followed for at least 5 years after undergoing transtibial pullout repair were recruited. Participants were identified using medical records and information in a prospectively collected database...
November 25, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29170873/multispecies-blow-fly-myiasis-combined-with-hypothermia-in-a-man-assumed-to-be-dead
#6
Victoria Bernhardt, Fabian Finkelmeier, Andrea Tal, Jörg Bojunga, Wojciech Derwich, Simon Meier, Constantin Lux, Marcel A Verhoff, Jens Amendt
We describe the case of a man who was found with severe hypothermia and advanced myiasis involving five species of blow flies, which eventually led to a transtibial amputation of the man's right leg. A case of such a heavy and species-rich infestation with fly larvae in an urban environment is extraordinary and has, to our knowledge, never been described so far. Best practice in cases such as this one demands accurate species identification not only to ensure appropriate treatment and pest management but also, from a forensic point of view, to explore the possibility of third-party responsibility...
November 23, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29162147/a-systematic-review-describing-incidence-rate-and-prevalence-of-dysvascular-partial-foot-amputation-how-both-have-changed-over-time-and-compare-to-transtibial-amputation
#7
Michael P Dillon, Matthew Quigley, Stefania Fatone
BACKGROUND: Partial foot amputation (PFA) is a common consequence of advanced peripheral vascular disease. Given the different ways incidence rate and prevalence data have been measured and reported, it is difficult to synthesize data and reconcile variation between studies. As such, there is uncertainty in whether the incidence rates and prevalence of PFA have increased over time compared to the decline in transtibial amputation (TTA). The aims of this systematic review were to describe the incidence rate and prevalence of dysvascular PFA over time, and how these compare to TTA...
November 21, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/29157737/predicting-successful-prosthetic-rehabilitation-in-major-lower-limb-amputation-patients-a-15-year-retrospective-cohort-study
#8
Inés Fajardo-Martos, Olga Roda, Ramón Zambudio-Periago, Aurora Bueno-Cavanillas, Fidel Hita-Contreras, Indalecio Sánchez-Montesinos
OBJECTIVE: To determine and compare specific factors that could be associated and predictive with successful prosthetic rehabilitation in major lower-limb amputations. METHODS: A 15-year long (2000-2014) retrospective observational cohort study was conducted. Two different criteria were used to define successful prosthetic rehabilitation: (1) the ability to walk at least 45m, regardless of assistive devices; and (2) walking >45m without other ambulatory aids than one cane (if required)...
November 7, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/29149193/correction-the-effect-of-alignment-changes-on-unilateral-transtibial-amputee-s-gait-a-systematic-review
#9
Niels Jonkergouw, Maarten R Prins, Arjan W P Buis, Peter van der Wurff
[This corrects the article DOI: 10.1371/journal.pone.0167466.].
2017: PloS One
https://www.readbyqxmd.com/read/29145876/standing-on-slopes-how-current-microprocessor-controlled-prosthetic-feet-support-transtibial-and-transfemoral-amputees-in-an-everyday-task
#10
Michael Ernst, Björn Altenburg, Malte Bellmann, Thomas Schmalz
BACKGROUND: Conventional prosthetic feet like energy storage and return feet provide only a limited range of ankle motion compared to human ones. In order to overcome the poor rotational adaptability, prosthetic manufacturers developed different prosthetic feet with an additional rotational joint and implemented active control in different states. It was the aim of the study to investigate to what extent these commercially available microprocessor-controlled prosthetic feet support a natural posture while standing on inclines and which concept is most beneficial for lower limb amputees...
November 16, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29136255/loss-of-internal-tibial-rotation-after-anterior-cruciate-ligament-reconstruction
#11
Shawn R Brandenburg, Thomas M Matelic
The flexion angle of the knee and the position of the tibia need to be considered during tensioning of the anterior cruciate ligament (ACL) graft to avoid overconstraining the knee. The purpose of this report was to describe 2 cases of loss of tibial internal rotation after single-bundle anatomic ACL reconstruction with graft tensioning in flexion. Retrospective review of each patient's operative chart revealed that the graft was tensioned in flexion and placed in an anatomic position in the femoral tunnel at the time of the index operation...
November 11, 2017: Orthopedics
https://www.readbyqxmd.com/read/29115973/anteromedial-versus-transtibial-technique-in-single-bundle-autologous-hamstring-acl-reconstruction-a-meta-analysis-of-prospective-randomized-controlled-trials
#12
REVIEW
Haitao Chen, Kai Tie, Yongjian Qi, Bin Li, Biao Chen, Liaobin Chen
BACKGROUND: The aim of this study was to compare the clinical outcome and postoperative complication between single-bundle anterior cruciate ligament (ACL) reconstruction with an anteromedial (AM) technique and a transtibial (TT) technique. METHODS: The study includes clinical randomized controlled trials comparing the clinical outcomes of ACL reconstruction using the autologous hamstring tendon with an AM method and a TT method published up to September 2017 were retrieved from PubMed, Cochrane Library, and Embase databases...
November 7, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29114628/femoral-tunnel-positioning-in-anterior-cruciate-ligament-reconstruction-anteromedial-portal-versus-transtibial-technique-a-randomized-clinical-trial
#13
Michele Venosa, Marco Delcogliano, Roberto Padua, Federica Alviti, Antonio Delcogliano
Purpose  The purpose of this study was to investigate, through three-dimensional computed tomography (3D-CT), the accuracy of femoral tunnel positioning in patients undergoing anterior cruciate ligament (ACL) reconstruction, comparing transtibial (TT) and anteromedial (AM) techniques. Methods  We evaluated postoperative 3D-CT scans of 26 patients treated with ACL reconstruction with hamstrings autograft using a low accessory AM portal technique and 26 treated with the TT technique. The position of the femoral tunnel center was measured with the quadrant method...
March 2017: Joints
https://www.readbyqxmd.com/read/29113533/measurement-properties-and-usability-of-non-contact-scanners-for-measuring-transtibial-residual-limb-volume
#14
Rianne Kofman, Anna M Beekman, Cornelis H Emmelot, Jan H B Geertzen, Pieter U Dijkstra
BACKGROUND: Non-contact scanners may have potential for measurement of residual limb volume. Different non-contact scanners have been introduced during the last decades. Reliability and usability (practicality and user friendliness) should be assessed before introducing these systems in clinical practice. OBJECTIVES: The aim of this study was to analyze the measurement properties and usability of four non-contact scanners (TT Design, Omega Scanner, BioSculptor Bioscanner, and Rodin4D Scanner)...
November 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29098324/increased-extrusion-and-icrs-grades-at-2-year-follow-up-following-transtibial-medial-meniscal-root-repair-evaluated-by-mri
#15
Daniel J Kaplan, Erin F Alaia, Andrew P Dold, Robert J Meislin, Eric J Strauss, Laith M Jazrawi, Michael J Alaia
PURPOSE: The purpose of the current study was to evaluate the short-term results of meniscal root repair surgery, assessing clinical and radiographic outcomes, utilizing MRI to assess root healing and extent of post-operative extrusion. METHODS: This was a single-center, retrospective study evaluating patients who had undergone a medial meniscus posterior root repair using a transtibial pullout technique with two locking cinch sutures. Demographic data were collected from patient charts...
November 2, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29054690/removable-rigid-dressings-for-postoperative-management-of-transtibial-amputations-a-review-of-published-evidence
#16
REVIEW
James P Reichmann, Phillip M Stevens, John Rheinstein, Christopher D Kreulen
Forty years of clinical experience and peer reviewed research studies support the use of non-weight bearing removable rigid dressings (RRD) as an effective means of post-operative management of transtibial amputations. We reviewed the published medical evidence regarding the use of RRDs as a postoperative management strategy, culminating in an evidence-based practice recommendation. Published peer reviewed literature on the topic was searched and classified by level of evidence based on the research design utilizing the scale recommended by the PM&R Journal (level I through V)...
October 17, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29051334/case-studies-in-physiology-the-biomechanics-of-the-fastest-sprinter-with-a-unilateral-transtibial-amputation
#17
Owen N Beck, Alena Marie Grabowski
People have debated whether athletes with transtibial amputations should compete with non-amputees in track events despite insufficient information regarding how the use of running-specific prostheses affects athletic performance. Thus, we sought to quantify the spatio-temporal variables, ground reaction forces, and spring-mass mechanics of the fastest athlete with a unilateral transtibial amputation using an RSP to reveal how he adapts his biomechanics to achieve elite running speeds. Accordingly, we measured ground reaction forces during treadmill running trials spanning 2...
October 19, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28984381/longitudinal-changes-in-knee-gait-mechanics-between-2-and-8-years-after-anterior-cruciate-ligament-reconstruction
#18
Jennifer C Erhart-Hledik, Constance R Chu, Jessica L Asay, Thomas P Andriacchi
The purpose of this study was to longitudinally investigate changes in knee joint kinematics and kinetics from 2 to 8 years post-ACLR. Seventeen subjects with primary unilateral transtibial ACLR performed bilateral gait analysis approximately 2 years and 8 years post-ACLR. Seventeen matched healthy control subjects were also analyzed. Kinematic and kinetic comparisons between the ACLR and contralateral limbs over time were completed using a 2 × 2 (time, limb) repeated-measures ANOVA. Unpaired Student's t-tests were used to compare the ACLR and contralateral kinematics and kinetics to the control group...
October 6, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28975280/the-functional-roles-of-muscles-passive-prostheses-and-powered-prostheses-during-sloped-walking-in-people-with-a-transtibial-amputation
#19
Nathaniel T Pickle, Alena M Grabowski, Jana R Jeffers, Anne K Silverman
Sloped walking is challenging for individuals with transtibial amputation (TTA) due to the functional loss of the ankle plantarflexors. Prostheses that actively generate ankle power may help to restore this lost function. The purpose of this study was to use musculoskeletal modeling and simulation to quantify the mechanical power delivered to body segments by passive and powered prostheses and the remaining muscles in the amputated and intact legs during sloped walking. We generated walking simulations from experimental kinematic and kinetic data on slopes of 0, ±3 deg and ±6 deg in eight people with a TTA using powered and passive prostheses and eight nonamputees...
November 1, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28970992/anterior-cruciate-ligament-reconstruction-with-bone-patellar-tendon-bone-graft-through-a-rectangular-bone-tunnel-made-with-a-rectangular-retro-dilator-an-operative-technique
#20
Hiroteru Hayashi, Daisaburo Kurosaka, Mitsuru Saito, Ryo Ikeda, Eiji Kijima, Yu Yamashita, Keishi Marumo
Good clinical results have been reported with anatomic anterior cruciate ligament (ACL) reconstructions in which rectangular bone-patellar tendon-bone (BTB) grafts were fixed into rectangular bone tunnels made at anatomic ACL insertion sites of the femur and tibia (anatomic rectangular tunnel BTB ACL reconstruction). Notwithstanding these good results, some problems have remained unsolved, including procedural complexity and risk of damage to the femoral posterior tunnel wall, damage to nerves and blood vessels, and damage to cartilage...
August 2017: Arthroscopy Techniques
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