Assessment of residual-limb volume change using bioimpedence

Sanders, Joan E.; Rogers, Ellen L.; Abrahamson, Daniel C.

doi:10.1682/jrrd.2006.08.0096

Cited by 23 publications

(24 citation statements)

References 27 publications

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“…Thus the increase from walking more than offset the decrease from the immediately prior standing (1.5%>0.9%). The cyclic changes during the walks visible in the plot (FIGURE 2) were due to pistoning and/or deformation of the residual limb within the socket, and they are typical of reports in prior investigations 25,27 . There was a gradual increase in fluid volume over the course of the session (beginning of first stand to end of 2 nd walk) of 2.1%.…”

Section: Resultssupporting

confidence: 74%

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Effects of elevated vacuum on in-socket residual limb fluid volume: Case study results using bioimpedance analysis

Sanders

Harrison

Myers

et al. 2011

JRRD

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Abstract-Bioimpedance analysis was used to measure the residual limb fluid volume of seven transtibial amputee subjects using elevated vacuum sockets and nonelevated vacuum sockets. Fluid volume changes were assessed during sessions with the subjects sitting, standing, and walking. In general, fluid volume losses during 3 or 5 min walks and losses over the course of the 30 min test session were less for elevated vacuum than for suction. Numerous variables, including the time of day that data were collected, soft tissue consistency, socket-tolimb size and shape differences, and subject health, may have affected the results and had an equivalent or greater effect on limb fluid volume compared with elevated vacuum. Researchers should well consider these variables in the study design of future investigations on the effects of elevated vacuum on residual limb volume.

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Section: Resultssupporting

confidence: 74%

“…Based on previous studies testing the capabilities of bioimpedance analysis for lower-limb assessment 25 , we considered the lowest percentage fluid volume change that could be accurately resolved in this research to be 0.2%. This resolution limit was principally due to bit quantification error in the instrument and processing algorithm.…”

Section: Resultsmentioning

confidence: 99%

Effects of elevated vacuum on in-socket residual limb fluid volume: Case study results using bioimpedance analysis

Sanders

Harrison

Myers

et al. 2011

JRRD

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“…An adjustable prosthetic socket is advantageous in assisting prosthetic users in managing common volume fluctuations. A socket with instant adjustability could be a valuable alternative to common volume management strategies and may help reduce adverse effects of prosthetic use due to poor volume management and socket fit (7,32–36). …”

Section: Discussionmentioning

confidence: 99%

Comparative Effectiveness of an Adjustable Transfemoral Prosthetic Interface Accommodating Volume Fluctuation: Case Study

2016

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The socket-limb interface is vital for functionality and provides stability and mobility for the amputee. Volume fluctuation can lead to compromised fit and function. Current socket technology does not accommodate for volume fluctuation. An adjustable interface may improve function and comfort by filling this technology gap. The purpose of this study was to compare the effectiveness of the standard of care (SOC) ischial ramus containment to an adjustable transfemoral prosthetic interface socket in the accommodation of volume fluctuation. A prospective experimental case study using repeated measures of subjective and performance outcome measures between socket conditions was employed. In the baseline volume condition, the adjustable socket improved subjective and performance measures 19% to 37% over SOC, whereas the two-minute walk test demonstrated equivalence. In the volume loss condition, the adjustable socket improved all subjective and performance measures 22% to 93%. All aggregated data improved 16% to 50% compared with the SOC. In simulated volume gain, the SOC socket failed, while the subject was able to complete the protocol using the adjustable socket. In this case study, the SOC socket was inferior to the comparative adjustable transfemoral amputation interface in subjective and performance outcomes. There is a lack of clinical trials and evidence comparing socket functional outcomes related to volume fluctuation.

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“…169 So techniques which measure stump volume after doffing are less useful. Sanders et al 141 investigated electrical bioimpedence as a measurement modality of spontaneous volume fluctuations inside socket and documented certain methods to reduce it as stump socks, airfilled and fluid-filled inserts and vacuum-assist devices. Many amputees carry extra stump socks in order to compensate the intra-day shrinkage.…”

Section: Residual Limb Volume Fluctuationsmentioning

confidence: 99%

Review: Problems with Use of Trans-Tibial Prosthesis

Chatterjee¹,

Majumder²,

Roy-Chowdhury³

et al. 2016

j med imaging hlth inform

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Discomfort and elevated energy consumption is still a common companion of many prosthetic users, generally due to altered loading condition which the body is not adapted to, preventing them to participate actively in the society. The socket, being an interface between body and prosthesis, is believed to be the most important concern regarding comfort of prosthetic use. The main cause of problem is altered gait dynamics. Local stress concentration, friction and slippage, confinement into warm moist environment inside socket, etc. adds to discomfort. The stump, being a living part, is also subjected to variations. These produce various soft tissue problems and enhance energy expenditure. This can be somewhat countered by even distribution of load along stump. In this review article, papers regarding biomechanics and pathomechanics of prosthetic gait, the mechanical and corresponding medical problems and suggested solutions have been studied in details. 59% of Trans-Tibial amputees and 78% of Trans-Femoral amputees are found to have problems with socket fit. This results in skin irritations in 41% of TT amputees and 22% of TF amputees. The main problems are regional stress concentration, friction and rubbing of stump along socket and energy expenditure. Hydrostatic total surface bearing and variable geometry fitting socket has been hypothesized to counter this problem though they are also having their own limitations.

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Assessment of residual-limb volume change using bioimpedence

Cited by 23 publications

References 27 publications

Effects of elevated vacuum on in-socket residual limb fluid volume: Case study results using bioimpedance analysis

Effects of elevated vacuum on in-socket residual limb fluid volume: Case study results using bioimpedance analysis

Comparative Effectiveness of an Adjustable Transfemoral Prosthetic Interface Accommodating Volume Fluctuation: Case Study

Review: Problems with Use of Trans-Tibial Prosthesis

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