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Above knee amputee

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https://www.readbyqxmd.com/read/29132347/knee-arthrodesis-versus-above-the-knee-amputation-after-septic-failure-of-revision-total-knee-arthroplasty-comparison-of-functional-outcome-and-complication-rates
#1
Sven Hungerer, Martin Kiechle, Christian von Rüden, Matthias Militz, Knut Beitzel, Mario Morgenstern
BACKGROUND: After septic failure of total knee arthroplasty (TKA) and multiple revision operations resulting in impaired function, bone and/or soft-tissue damage a reconstruction with a revision arthroplasty might be impossible. Salvage procedures to regain mobility and quality of life are an above-the-knee amputation or knee arthrodesis. The decision process for the patient and surgeon is difficult and data comparing arthrodesis versus amputation in terms of function and quality of life are scarce...
November 13, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29126767/the-quality-of-life-analysis-of-knee-prosthesis-with-complete-microprocessor-control-in-trans-femoral-amputees
#2
Yavuz Saglam, Baris Gulenc, Fevzi Birisik, Ali Ersen, Ebru Yilmaz Yalcinkaya, Onder Yazicioglu
OBJECTIVE: The aim of this study was to analyze the patient demographics, etiology of limb loss as well as reporting SF-36 scores for microprocessor prosthesis users in Turkish population. METHODS: We reviewed 72 patients (61 male and 11 female; mean age: 37.7 ± 10.7) with uni-lateral, above knee amputation and a history of regular and microprocessor prosthesis use. All patients were called back for a last follow-up and they were asked to fill a self-administered general health status questionnaire (SF-36)...
November 7, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29075428/obtaining-natural-sit-to-stand-motion-with-a-biomimetic-controller-for-powered-knee-prostheses
#3
Molei Wu, Md Rejwanul Haque, Xiangrong Shen
Standing up from a seated position is a common activity in people's daily life. However, for transfemoral (i.e., above-knee) amputees fitted with traditional passive prostheses, the sit-to-stand (STS) transition is highly challenging, due to the inability of the prosthetic joints in generating torque and power output. In this paper, the authors present a new STS control approach for powered lower limb prostheses, which is able to regulate the power delivery of the prosthetic knee joint to obtain natural STS motion similar to that displayed by healthy subjects...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29069141/intra-arterial-fibrinolysis-for-the-management-of-acute-ischemia-on-a-below-knee-amputation-stump-case-report
#4
Breno Boueri Affonso, Joaquim Maurício da Motta Leal, Rafael Noronha Cavalcante, Priscila Mina Falsarella, Francisco Leonardo Galastri, Rodolfo Souza Cardoso, Felipe Nasser
Preservation of the knee joint has enormous advantages in terms of mobility and rehabilitation of an amputee. Any cause of breakdown requiring revision to an above-knee amputation is a major setback because it reduces the patient's rehabilitative potential. We report a case of intra-arterial thrombolysis use to save a below-knee amputation stump with acute ischemia. A 56-year-old man who sought the emergency department with 1-day history of acute pain on his right below-knee stump. The angiography confirmed popliteal artery occlusion...
October 23, 2017: Einstein
https://www.readbyqxmd.com/read/28952363/identification-of-the-critical-level-of-implantation-of-an-osseointegrated-prosthesis-for-above-knee-amputees
#5
Elder Michael Andrango Castro, Svatava Konvickova, Matej Daniel, Zdenek Horak
The aim of our study was to identify potential critical levels of implantation of an osseointegrated prosthesis for above-knee amputees. The implant used was the OPRA system. It was inserted in the femur at four different amputation heights, characterized by their residual limb ratios (0.299, 0.44, 0.58 and 0.73). The stress and strain distribution was evaluated in the bone-implant system during walking, considering a body mass of 100 kg. Considerably high stimulus (11,489 με) in the tissue near the tip was found at the highest implantation level...
September 27, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28946826/when-to-biomechanically-examine-a-lower-limb-amputee-a-systematic-review-of-accommodation-times
#6
Andrea B Wanamaker, Rebecca R Andridge, Ajit Mw Chaudhari
BACKGROUND: Hundreds of investigations examining biomechanical outcomes of various prostheses have been completed, but one question remains unanswered: how much time should an amputee be given to accommodate to a new prosthesis prior to biomechanical testing? OBJECTIVE: To examine the literature for accommodation time given during biomechanical investigations to determine whether consensus exists. STUDY DESIGN: Systematic review. METHODS: A systematic search was completed on 7 January 2016 using PubMed and Scopus...
October 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28819590/minimally-invasive-total-hip-replacement-in-an-ipsilateral-post-traumatic-above-knee-amputation-a-case-report
#7
Sanjeev Patnaik, Biswaranjan Nayak, Akshaya Kumar Sahoo, Nabin Kumar Sahu
INTRODUCTION: Total hip replacement (THR) is a highly successful operation in alleviating pain and improving the overall function of the hip, in end-stage arthritis of the hip, in otherwise fit patients. However, THR as a surgical option in post-traumatic hip arthritis with ipsilateral above-knee amputation is rarely reported. CASE REPORT: We are presenting a case report of a 30-year-old male, who had previously underwent an above-knee amputation due to road-traffic accident, presenting 24 h after the injury with segmental fracture femur and popliteal artery laceration, for which the limb could not be salvaged...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28814042/portable-haptic-device-for-lower-limb-amputee-gait-feedback-assessing-static-and-dynamic-perceptibility
#8
M A B Husman, H F Maqbool, M I Awad, A A Dehghani-Sanij
Loss of joints and severed sensory pathway cause reduced mobility capabilities in lower limb amputees. Although prosthetic devices attempt to restore normal mobility functions, lack of awareness and control of limb placement increase the risk of falling and causing amputee to have high level of visual dependency. Haptic feedback can serve as a cue for gait events during ambulation thus providing sense of awareness of the limb position. This paper presents a wireless wearable skin stretch haptic device to be fitted around the thigh region...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814020/piecewise-and-unified-phase-variables-in-the-control-of-a-powered-prosthetic-leg
#9
Dario J Villarreal, David Quintero, Robert D Gregg
Many control methods have been proposed for powered prosthetic legs, ranging from finite state machines that switch between discrete phases of gait to unified controllers that have a continuous sense of phase. In particular, recent work has shown that a mechanical phase variable can parameterize the entire gait cycle for controlling a prosthetic leg during steady rhythmic locomotion. However, the unified approach does not provide voluntary control over non-rhythmic motions like stepping forward and back. In this paper we present a phasing algorithm that uses the amputee's hip angle to control both rhythmic and non-rhythmic motion through two modes: 1) a piecewise (PW) function that provides users voluntary control over stance and swing in a piecewise manner, and 2) a unified function that continuously synchronizes the motion of the prosthetic leg with the amputee user at different walking speeds...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28630841/bipolar-hemiarthroplasty-in-a-patient-with-above-knee-amputation-surgical-technique
#10
Ramesh Perumal, Santhosh Ram Gaddam, J Vasudeva, J Dheenadhayalan, S Rajasekaran
INTRODUCTION: Femoral neck fractures are a common occurrence in lower limb amputees. Good post-operative results of hip hemiarthroplasty have been described in below-knee amputees. However, to our knowledge, very few such cases have been reported in above-knee amputees. CASE REPORT: We present a case of a 75-year-old male patient who underwent above-knee amputation of the right lower limb for severe crush injury right leg and a bipolar hemiarthroplasty for an ipsilateral fracture neck of femur sustained in the same road traffic accident...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28567161/serial-femoral-fractures-in-an-amputation-stump-a-case-report
#11
M Nannaparaju, K Annavaram, R Anwar, W S Khan, J Hambidge
We report a case of an above-knee amputee who underwent dynamic hip screw fixation for a proximal femoral fracture and then open reduction and internal fixation a few years later for a further femoral fracture in the same stump. The patient had a good outcome. We aim to discuss the challenges in decision making, surgical technique and potential complications for the patient.
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28470463/-the-endo-exo-prosthesis-treatment-concept-improvement-in-quality-of-life-after-limb-amputation
#12
T Hoffmeister, F Schwarze, H H Aschoff
Osseointegrated, percutaneous implants as the force bearer for exoprosthetics after limb amputation have been used in individual cases for clinical rehabilitation of amputees during the past years. Most experience in this field in Germany has been accumulated at the Sana Klinik in Lübeck with the so-called endo-exo prosthesis (EEP) system. The two-step implantation procedure can now be considered as reliable. Following a well-documented learning curve initial soft tissue problems concerning the cutaneous stoma can now be regarded as exceptions...
May 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28280845/-function-of-prosthesis-components-in-lower-limb-amputees-with-bone-anchored-percutaneous-implants-biomechanical-aspects
#13
S Blumentritt
BACKGROUND: Bone anchorage of an artificial limb has been proven to be an alternative intervention for amputees when prosthesis use is seriously reduced because of stump problems. Little is known about how prosthesis components interact with bone and joints and which potential the optimum use provides with respect to quality of treatment of leg amputees. OBJECTIVE: Does osseointegration influence the motor activity of residual limbs differently compared with socket prostheses? How should prosthesis components be aligned? What type of prosthetic knee joints should be preferred in transfemoral amputees? MATERIAL AND METHODS: Transfer of biomechanical knowledge of socket prosthetics to bone-anchored prostheses...
May 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28269409/does-the-impedance-of-above-knee-powered-prostheses-need-to-be-adjusted-for-load-carrying-conditions
#14
Andrea Brandt, Ming Liu, He Helen Huang
Powered knee prostheses provide substantial advantages for amputees compared to traditional passive devices during basic walking tasks (i.e. level-ground, stairs, ramps), but the impedance control parameters are fixed. For environments that differ from the well-controlled setting of the clinic, amputees must compensate their gait patterns because fixed control parameters ideal for walking on level ground in the clinic do not meet real-life task demands. Load carriage is one instance where fixed control parameters may lead to undesired gait patterns and potentially result in injury...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269400/effect-of-environmental-factors-on-level-of-trip-disturbance-a-simulation-study
#15
Ming Liu, Peter Bohlen, He Helen Huang
Above knee amputees exhibit a higher risk of falling than able-bodied people, so the capacity to recover from trips (a major cause of unintentional falls) is critical for these amputees to prevent fall-related injuries. Although trip recovery approaches using powered prostheses have been proposed, the effectiveness of these approaches has not been evaluated with varied trip-related disturbance levels. Here, we conducted a simulation study to understand the relationship between trip-related disturbance levels and environmental factors...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28242264/association-between-phantom-limb-complex-and-the-level-of-amputation-in-lower-limb-amputee
#16
Bayram Kelle, Erkan Kozanoğlu, Ömer Sunkar Biçer, İsmet Tan
OBJECTIVE: The aim of this study was to evaluate the natural course of phantom limb complex without any treatment after lower limb amputation. METHODS: The study design was consisted of a combination of retrospective review and cross-sectional interview. 101 patients with lower limb amputation were included into the study. Patients were divided into three groups according to the amputation level: i) from hip disarticulation to knee disarticulation (including knee disarticulation) (25 patients, mean age: 55...
February 24, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28227652/does-the-impedance-of-above-knee-powered-prostheses-need-to-be-adjusted-for-load-carrying-conditions
#17
Andrea Brandt, Ming Liu, He Helen Huang, Andrea Brandt, Ming Liu, He Helen Huang, He Helen Huang, Ming Liu, Andrea Brandt
Powered knee prostheses provide substantial advantages for amputees compared to traditional passive devices during basic walking tasks (i.e. level-ground, stairs, ramps), but the impedance control parameters are fixed. For environments that differ from the well-controlled setting of the clinic, amputees must compensate their gait patterns because fixed control parameters ideal for walking on level ground in the clinic do not meet real-life task demands. Load carriage is one instance where fixed control parameters may lead to undesired gait patterns and potentially result in injury...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227643/effect-of-environmental-factors-on-level-of-trip-disturbance-a-simulation-study
#18
Ming Liu, Peter Bohlen, He Helen Huang, Ming Liu, Peter Bohlen, He Helen Huang, Peter Bohlen, He Helen Huang, Ming Liu
Above knee amputees exhibit a higher risk of falling than able-bodied people, so the capacity to recover from trips (a major cause of unintentional falls) is critical for these amputees to prevent fall-related injuries. Although trip recovery approaches using powered prostheses have been proposed, the effectiveness of these approaches has not been evaluated with varied trip-related disturbance levels. Here, we conducted a simulation study to understand the relationship between trip-related disturbance levels and environmental factors...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28105948/active-lower-limb-prosthetics-a-systematic-review-of-design-issues-and-solutions
#19
REVIEW
Michael Windrich, Martin Grimmer, Oliver Christ, Stephan Rinderknecht, Philipp Beckerle
This paper presents a review on design issues and solutions found in active lower limb prostheses. This review is based on a systematic literature search with a methodical search strategy. The search was carried out across four major technical databases and the retrieved records were screened for their relevance. A total of 21 different active prostheses, including 8 above-knee, 9 below-knee and 4 combined knee-ankle prostheses were identified. While an active prosthesis may help to restore the functional performance of an amputee, the requirements regarding the actuation unit as well as for the control system are high and the development becomes a challenging task...
December 19, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28032037/surgical-apgar-score-predicts-early-complication-in-transfemoral-amputees-retrospective-study-of-170-major-amputations
#20
Christian Wied, Nicolai B Foss, Morten T Kristensen, Gitte Holm, Thomas Kallemose, Anders Troelsen
AIM: To assess whether the surgical apgar score (SAS) is a prognostic tool capable of identifying patients at risk of major complications following lower extremity amputations surgery. METHODS: This was a single-center, retrospective observational cohort study conducted between January 2013 and April 2015. All patients who had either a primary transtibial amputation (TTA) or transfemoral amputation (TFA) conducted at our institution during the study period were assessed for inclusion...
December 18, 2016: World Journal of Orthopedics
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