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https://www.readbyqxmd.com/read/28819590/minimally-invasive-total-hip-replacement-in-an-ipsilateral-post-traumatic-above-knee-amputation-a-case-report
#1
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/28815387/image-guided-surgical-robotic-system-for-percutaneous-reduction-of-joint-fractures
#2
Giulio Dagnino, Ioannis Georgilas, Samir Morad, Peter Gibbons, Payam Tarassoli, Roger Atkins, Sanja Dogramadzi
Complex joint fractures often require an open surgical procedure, which is associated with extensive soft tissue damages and longer hospitalization and rehabilitation time. Percutaneous techniques can potentially mitigate these risks but their application to joint fractures is limited by the current sub-optimal 2D intra-operative imaging (fluoroscopy) and by the high forces involved in the fragment manipulation (due to the presence of soft tissue, e.g., muscles) which might result in fracture malreduction. Integration of robotic assistance and 3D image guidance can potentially overcome these issues...
August 16, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28814056/design-of-a-lightweight-tethered-torque-controlled-knee-exoskeleton
#3
Kirby Ann Witte, Andreas M Fatschel, Steven H Collins
Lower-limb exoskeletons show promise for improving gait rehabilitation for those with chronic gait abnormalities due to injury, stroke or other illness. We designed and built a tethered knee exoskeleton with a strong lightweight frame and comfortable, four-point contact with the leg. The device is structurally compliant in select directions, instrumented to measure joint angle and applied torque, and is lightweight (0.76 kg). The exoskeleton is actuated by two off-board motors. Closed loop torque control is achieved using classical proportional feedback control with damping injection in conjunction with iterative learning...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814027/challenges-in-using-compliant-ligaments-for-position-estimation-within-robotic-joints
#4
Felix Russell, Lei Gao, Peter Ellison, Ravi Vaidyanathan
The mechanical advantages of bio-inspired condylar robotic knee joints for use in prosthetics or rehabilitation has been argued extensively in literature. A common limitation of these designs is the difficulty of estimating joint angle and therefore accurately controlling the joint. Furthermore, the potential role of ligament-like structures in robotic knees is not very well established. In this work, we investigate the role of compliant stretch sensing ligaments and their integration into a condylar robotic knee...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813978/evaluation-of-3d-printed-anatomically-scalable-transfemoral-prosthetic-knee
#5
Tyagi Ramakrishnan, Millicent Schlafly, Kyle B Reed
This case study compares a transfemoral amputee's gait while using the existing Ossur Total Knee 2000 and our novel 3D printed anatomically scalable transfemoral prosthetic knee. The anatomically scalable transfemoral prosthetic knee is 3D printed out of a carbon-fiber and nylon composite that has a gear-mesh coupling with a hard-stop weight-actuated locking mechanism aided by a cross-linked four-bar spring mechanism. This design can be scaled using anatomical dimensions of a human femur and tibia to have a unique fit for each user...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813966/exergaming-with-a-pediatric-exoskeleton-facilitating-rehabilitation-and-research-in-children-with-cerebral-palsy
#6
Thomas C Bulea, Zachary F Lerner, Andrew J Gravunder, Diane L Damiano
Effective rehabilitation of children with cerebral palsy (CP) requires intensive task-specific exercise but many in this population lack the motor capabilities to complete the desired training tasks. Providing robotic assistance is a potential solution yet the effects of this assistance are unclear. We combined a novel exoskeleton and exercise video game (exergame) to create a new rehabilitation paradigm for children with CP. We incorporated high density electroencephalography (EEG) to assess cortical activity...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813947/exploiting-kinematic-constraints-to-compensate-magnetic-disturbances-when-calculating-joint-angles-of-approximate-hinge-joints-from-orientation-estimates-of-inertial-sensors
#7
Daniel Laidig, Thomas Schauer, Thomas Seel
Inertial Measurement Units (IMUs) have become a widely used tool for rehabilitation and other application domains in which human motion is analyzed using an ambulatory or wearable setup. Since the magnetic field is inhomogeneous in indoor environments and in the proximity of ferromagnetic material, standard orientation estimation and joint angle calculation algorithms often lead to inaccurate or even completely wrong results. One approach to circumvent this is to exploit the kinematic constraint that is induced by mechanical hinge joints and also by approximate hinge joints such as the knee joint and the finger (interphalangeal) joints of the human body...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813868/relationship-between-assistive-torque-and-knee-biomechanics-during-exoskeleton-walking-in-individuals-with-crouch-gait
#8
Zachary F Lerner, Diane L Damiano, Thomas C Bulea
Crouch or "flexed knee" gait is a pathological gait pattern affecting many individuals with cerebral palsy. One proposed method to alleviate crouch is to provide robotic assistance to knee extension during walking. The purpose of this study was to evaluate how the magnitude of knee extensor torque affects knee kinematics, kinetics, and muscle activity. Motion capture, ground reaction force and electromyography data were collected while four participants with crouch gait from cerebral palsy walked with assistance from a novel robotic exoskeleton on an instrumented treadmill...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813864/gait-assessment-system-based-on-novel-gait-variability-measures
#9
Xingchen Wang, Danijela Ristic-Durrant, Matthias Spranger, Axel Graser
In this paper, a novel gait assessment system based on measures of gait variability reflected through the variability of shapes of gait cycles trajectories is proposed. The presented gait assessment system is based on SVM (support vector machine) classifier and on gait variability-based features calculated from the hip and knee joint angle trajectories recorded using wearable IMUs during walking trials. A system classifier was trained to distinguish healthy gait patterns from the pathological ones. The features were extracted by calculating the distances between the joint trajectories of the individual gait cycles using 4 different distance functions...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813861/exoskeleton-for-gait-rehabilitation-of-children-conceptual-design
#10
Jorge L Cornejo, Jesus F Santana, Sergio A Salinas
This paper presents the conceptual design of an exoskeleton for gait rehabilitation of children. This system has electronics, mechanicals and software sections, which are implemented and tested using a mannequin of a child. The prototype uses servomotors to move robotic joints that are attached to simulated patient's legs. The design has 4 DOF (degrees of freedom) two for hip joints and other two for knee joints, in the sagittal plane. A microcontroller measures sensor signals, controls motors and exchanges data with a computer...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813853/towards-human-knee-orthosis-interaction-based-on-adaptive-impedance-control-through-stiffness-adjustment
#11
Joana Figueiredo, Paulo Felix, Cristina P Santos, Juan C Moreno
Rehabilitation interventions involving powered, wearable lower limb orthoses that can provide high-challenging locomotor tasks for repetitive training sessions, mainly when assist-as-needed strategies, such as adaptive impedance control, are designed. In this study, the adaptive behavior was ensured by software control of the robotic stiffness involved in the human-knee orthosis interaction in function of the gait cycle and speed. To estimate the stiffness, we analyzed the interaction torque-angle characteristics with experimental data...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813844/soft-stop-knee-brace-for-rehabilitation-from-ligament-injuries-design-and-pilot-trial
#12
James R J Greenfield, Haram Francis Hwang, Claire Davies, Andrew J McDaid
Ligaments within the human knee are commonly torn or injured as a result of sports that involve sharp direction changes, pivoting and landing. For this reason, athletes are often side-lined from their respective sports for up to 18 months after injury to rehabilitate. As part of the rehabilitation process, knee braces are often prescribed in an attempt to decrease the recovery period of the injured individual by restraining and minimizing the motion at the knee. However, the true efficacy of knee bracing is yet to be fully evaluated as studies show mixed results to whether braces actually decrease the rehabilitation period for patients...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813836/development-of-new-rehabilitation-robot-device-that-can-be-attached-to-the-conventional-knee-ankle-foot-orthosis-for-controlling-the-knee-in-individuals-after-stroke
#13
Kawasaki Shihomi, Ohata Koji, Tsuboyama Tadao, Sawada Yuichi, Higashi Yoshiyuki
This research developed a device that can be attached to the conventional Knee-Ankle-Foot-Orthosis for controlling the knee in individuals after stroke. The device automatically assists the flexion and extension movements of the knee joint at the appropriate timing. We aimed to clarify the effect of this device on gait performance, kinematic pattern and muscle activation during gait. Seventeen participants after stroke were recruited in this study. They walked with this device for 3 minutes, and we measured the 10m gait time, number of steps, knee motion using electric goniometer and muscle activities of lower limbs during gait...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813827/biomechanical-effects-of-robot-assisted-walking-on-knee-joint-kinematics-and-muscle-activation-pattern
#14
Pavithra Thangavel, S Vidhya, Junhua Li, Effie Chew, Anastasios Bezerianos, Haoyong Yu
Since manual rehabilitation therapy can be taxing for both the patient and the physiotherapist, a gait rehabilitation robot has been built to reduce the physical strain and increase the efficacy of the rehabilitation therapy. The prototype of the gait rehabilitation robot is designed to provide assistance while walking for patients with abnormal gait pattern and it can also be used for rehabilitation therapy to restore an individual's normal gait pattern by aiding motor recovery. The Gait Rehabilitation Robot uses gait event based synchronization, which enables the exoskeleton to provide synchronous assistance during walking that aims to reduce the lower-limb muscle activation...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28812039/three-dimensional-biomechanical-analysis-of-rearfoot-and-forefoot-running
#15
Sebastian Knorz, Felix Kluge, Kolja Gelse, Stefan Schulz-Drost, Thilo Hotfiel, Matthias Lochmann, Björn Eskofier, Sebastian Krinner
BACKGROUND: In the running community, a forefoot strike (FFS) pattern is increasingly preferred compared with a rearfoot strike (RFS) pattern. However, it has not been fully understood which strike pattern may better reduce adverse joint forces within the different joints of the lower extremity. PURPOSE: To analyze the 3-dimensional (3D) stress pattern in the ankle, knee, and hip joint in runners with either a FFS or RFS pattern. STUDY DESIGN: Descriptive laboratory study...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28810991/posterior-cruciate-ligament-injuries-associated-with-military-survival-swim-training
#16
Michael S Crowell, John S Mason, Matthew A Posner, Chad A Haley
OBJECTIVES: Posterior cruciate ligament (PCL) injuries are relatively common injuries associated with athletic activities and high-energy trauma. Posterolateral corner (PLC) injuries frequently accompany injury to the PCL. Diagnosis can be challenging and requires a comprehensive history and physical examination. Patients frequently report vague, nonspecific symptoms and the mechanism of injury is often useful in localizing injured structures. Two of the more common mechanisms for PCL injury include a direct blow to the proximal anterior tibia with the knee flexed, as well as a significant knee hyperextension injury...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810990/gait-and-functional-outcomes-for-young-active-males-with-traumatic-unilateral-transfemoral-limb-loss
#17
Caitlin E Mahon, Alison L Pruziner, Brad D Hendershot, Erik J Wolf, Benjamin J Darter, K Bo Foreman, Joseph B Webster
OBJECTIVE: Altered body structures that occur with the loss of a lower limb can impact mobility and quality of life. Specifically, biomechanical changes that result from wearing a prosthesis have been associated with an increased risk of falls or joint degeneration, as well as increased energy demands. While previous studies describing these outcomes are typically limited by number of outcome measures and/or small, diverse patient groups, recent military conflicts present a unique opportunity to collect outcomes from a relatively homogenous, active patient population with limb loss...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28808629/return-to-sport-following-tibial-plateau-fractures-a-systematic-review
#18
Greg A J Robertson, Seng J Wong, Alexander M Wood
AIM: To systemically review all studies reporting return to sport following tibial plateau fracture, in order to provide information on return rates and times to sport, and to assess variations in sporting outcome for different treatment methods. METHODS: A systematic search of CINAHAL, Cochrane, EMBASE, Google Scholar, MEDLINE, PEDro, Scopus, SPORTDiscus and Web of Science was performed in January 2017 using the keywords "tibial", "plateau", "fractures", "knee", "athletes", "sports", "non-operative", "conservative", "operative", "return to sport"...
July 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28802773/active-physiotherapy-interventions-following-total-knee-arthroplasty-in-the-hospital-and-inpatient-rehabilitation-settings-a-systematic-review-and-meta-analysis
#19
REVIEW
Kate G Henderson, Jason A Wallis, David A Snowdon
BACKGROUND: Physiotherapy is a routine component of postoperative management following total knee arthroplasty (TKA). As the demand for surgery increases it is vital that postoperative physiotherapy interventions are effective and efficient. OBJECTIVES: Determine the most beneficial active physiotherapy interventions in acute hospital and inpatient rehabilitation for improving pain, activity, range of motion and reducing length of stay for adults who have undergone TKA...
February 1, 2017: Physiotherapy
https://www.readbyqxmd.com/read/28799964/the-effect-of-adductor-canal-block-on-knee-extensor-muscle-strength-6-weeks-after-total-knee-arthroplasty-a-randomized-controlled-trial
#20
Nicolas Rousseau-Saine, Stephan R Williams, François Girard, Luc J Hébert, Florian Robin, Luc Duchesne, Frédéric Lavoie, Monique Ruel
BACKGROUND: Total knee arthroplasty (TKA) reduces knee extensor muscle strength (KES) in the operated limb for several months after the surgery. Immediately after TKA, compared to either inguinal femoral nerve block or placebo, adductor canal block (ACB) better preserves KES. Whether this short-term increase in KES is maintained several weeks after surgery remains unknown. We hypothesized that 48 hours of continuous ACB immediately after TKA would improve KES 6 weeks after TKA, compared to placebo...
August 9, 2017: Anesthesia and Analgesia
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