Assessment of Pressures Within the Prosthetic Socket of a Person With Osteomyoplastic Amputation During Varied Walking Tasks

Commuri, Sesh; Day, Jonathan D.; Dionne, Carol P.; Ertl, William

doi:10.1097/jpo.0b013e3181cca6e0

Cited by 9 publications

(7 citation statements)

References 13 publications

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“…3,7,15,18,21,22,25,28,31 The stress state in the soft tissues of a lower limb amputee has been established in experimentation procedures using force transducers. 1,3,6,13,[18][19][20][21]23,24,30,31 However, the sensors used in the experimentation can produce stress concentrations over the soft tissues, can modify the gait, and the results are valid only at the point where the sensor is located. 22,23 All these experimental difficulties have favored the use of numerical methods like the finite element (FE) method to assess the stress-strain state in a lower limb stump.…”

Section: Introductionmentioning

confidence: 98%

“…They use either static models, 9,10,16,17,19,26,27,30,31 quasi-static model, 5 or qeuasi-dynamic models. 7,8 The loads and boundary conditions (BCs) can be divided into two groups: (1) those which generate forces, moments, or displacements over the bone and applying a displacement or rotation restriction over the socket, 5,7,8,11,13,[16][17][18][19]27,30,31 and (2) those which generate forces, moments, or displacements over the socket while restricting the bone. 10,26 In either group, data from gait analysis are used to define the magnitude and direction of the loads.…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Analysis of Donning Procedure of a Prosthetic Transfemoral Socket

Lacroix

Patiño

2011

Ann Biomed Eng

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Lower limb amputation is a severe psychological and physical event in a patient. A prosthetic solution can be provided but should respond to a patient-specific need to accommodate for the geometrical and biomechanical specificities. A new approach to calculate the stress-strain state at the interaction between the socket and the stump of five transfemoral amputees is presented. In this study the socket donning procedure is modeled using an explicit finite element method based on the patient-specific geometry obtained from CT and laser scan data. Over stumps the mean maximum pressure is 4 kPa (SD 1.7) and the mean maximum shear stresses are 1.4 kPa (SD 0.6) and 0.6 kPa (SD 0.3) in longitudinal and circumferential directions, respectively. Locations of the maximum values are according to pressure zones at the sockets. The stress-strain states obtained in this study can be considered more reliable than others, since there are normal and tangential stresses associated to the socket donning procedure.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Donning Procedure of a Prosthetic Transfemoral Socket

Lacroix

Patiño

2011

Ann Biomed Eng

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“…Normalized EMG signals over one gait cycle of TA and GAS muscles obtained using data from Winter 2 (Appendix Table 5.22 and Table 5.24) are summarized in Figure 1. 5,6 This procedure aims to add rigidity to the lower limb, aid load transfer between the residual limb and the prosthetic socket, and provide stability during amputee gait. 2,3 At the initial contact (or heel strike), the TA contracts at its highest level (EMG signal reaches the highest magnitude), controlling plantarflexion through eccentric contraction.…”

mentioning

confidence: 99%

Residual Muscle Contraction and Residuum Socket Interface Force in Men with Transtibial Osteomyoplastic Amputation

Mai

Commuri

Dionne

et al. 2013

JPO Journal of Prosthetics and Orthotics

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In the transtibial osteomyoplastic amputation (TOA) technique, the distal ends of the tibia and fibula are surgically joined to form a ''bone bridge'' to stabilize the bony anatomy of the distal residuum. The distal-most muscles also are secured to reestablish a length-tension relationship. Unlike conventional amputation techniques in which the muscles are not secured and do not retain length-tension relationship, the TOA procedure is anticipated to allow muscles to actively contract and retain normal physiological function. In this case series, outcomes of the TOA procedure were investigated by measuring electromyography signals from the tibialis anterior and gastrocnemius muscles in the residuum and forces at the residuum socket interface (RSI) in unilateral transtibial amputees with TOA during three types of gait activities (self-paced walking, brisk 2-minute walking, and walking over a distance of 25 ft while carrying various loads). Results confirmed the presence of loadings at the distal residuum and the activity in the residuum muscles during these gaits. Furthermore, statistical analysis showed that when the distal RSI force variation was higher, the residual tibialis anterior muscle was more active compared with its activity at lower distal RSI force variation. (J Prosthet Orthot. 2013;25:151Y158.)

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“…Vital signs and reports of perceived exertion were recorded to ensure participant safety ( 13 ). Pressure and muscle activation data were collected using the OU-PAM ( 3 , 14 ), which can capture 16 analog input channels at 1 kHz. It utilizes the STK525 ( 15 ) and ATEVK525 ( 15 ) boards for data acquisition.…”

Section: Methodsmentioning

confidence: 99%

Comparing Temporospatial Performance During Brisk and Self-Paced Walking by Men With Osteomyoplastic Transfemoral Amputation and Controls Using Pressure and Muscle Activation Peak Times

Shotande¹,

Veirs²,

Day³

et al. 2022

Front. Rehabilit. Sci.

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BackgroundThe aim of osteomyoplastic transfemoral amputation (OTFA) is to produce sustained, robust prosthetic gait performance by residuum reconstructing. A better understanding of residuum-socket interface pressures (RSI) and residuum muscle activation should uniquely reveal gait stability to better inform long-term rehabilitation goals.ObjectivesThe objectives of this study are to characterize RSI pressures and residuum muscle activation in men with OTFA while walking at two speeds and compare temporospatial muscle activation with intact controls.MethodsIn this study, we observed and compared healthy men with OTFA and controls during 2-min gait trials at brisk and self-paced speeds, two visits, and 1 year apart. RSI pressures and hip adductors, hamstrings, and quadriceps activation were recorded for those with OTFA. OTFA temporospatial muscle activation patterns were compared with the controls. Within the extracted strides, heel-strike and toe-off events and EMG activation peak times were characterized and compared. Peak times for pressure and EMG activity were examined in individual muscles and antagonist muscles of residual and intact limbs.ResultsSix men with OTFA exhibited adductor, hamstring, and quadriceps co-contraction within intact and residual limbs, regardless of walking speed or trial. Co-contraction within their intact limb occurred throughout the gait cycle. Within the residuum, co-contraction occurred during weight transference. The 75% most likely RSI peaks occurred during stance. EMG peaks were 75% most likely to occur during early stance, terminal stance-initial swing, and terminal swing.ConclusionParticipants with OTFA demonstrated adductors-hamstrings-quadriceps co-contraction in the intact thigh and residuum with corresponding RSI pressure increase, primarily during transitions between stance and swing, indicating gait instability, demonstrating the need to explicitly address these deficits continuously in rehabilitation and wellness settings.

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Assessment of Pressures Within the Prosthetic Socket of a Person With Osteomyoplastic Amputation During Varied Walking Tasks

Cited by 9 publications

References 13 publications

Finite Element Analysis of Donning Procedure of a Prosthetic Transfemoral Socket

Finite Element Analysis of Donning Procedure of a Prosthetic Transfemoral Socket

Residual Muscle Contraction and Residuum Socket Interface Force in Men with Transtibial Osteomyoplastic Amputation

Comparing Temporospatial Performance During Brisk and Self-Paced Walking by Men With Osteomyoplastic Transfemoral Amputation and Controls Using Pressure and Muscle Activation Peak Times

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