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• W2949465362 abstract "Prosthetic elevated vacuum is a suspension method used to reduce daily volume changes of the residual limb. Evaluation of the effectiveness of these systems is limited due to a lack of correlation to actual socket air pressure, particularly during unconstrained movements. This may explain some of the variability in functional outcomes reported in the literature. Our objective was to develop a light-weight portable socket measurement system to quantify internal socket air pressure, temperature, and acceleration; and to present preliminary results from implementation with three transtibial prosthesis users with mechanical elevated vacuum pumps. Participants completed five functional tasks with and without the vacuum pumps actively connected, including the 2-Minute Walk test, 5-Times Sit-to-Stand test, 4-Square Step test, L-Test, and Figure-8 test. Results demonstrated different gait profiles and pressure ranges for each user. Two of the participants demonstrated substantially lower air pressure (higher vacuum) over time while the pump was active compared to inactive. The minimum air pressure measured for all participants was -34.6 ± 7.7 kPa. One participant did not show substantial changes in pressure over time for either pump condition. Functional task performance was not significantly different between pump conditions. Correlation with accelerometer readings indicated peak positive pressures occurred just following initial contact of the foot in early stance, and the most negative pressures (highest vacuum) were observed throughout swing. This study has demonstrated the use of a portable data logging tool that may serve the clinical and research communities to quantify the operation of elevated vacuum systems, and better understand the variability of mechanical pump operation and overall system performance." @default.
• W2949465362 created "2019-06-27" @default.
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• W2949465362 date "2018-10-22" @default.
• W2949465362 modified "2023-09-28" @default.
• W2949465362 title "Real time monitoring of transtibial elevated vacuum prostheses: A case series on socket air pressure" @default.
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• W2949465362 doi "https://doi.org/10.1371/journal.pone.0202716" @default.
• W2949465362 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6197629" @default.
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• W2949465362 hasPublicationYear "2018" @default.
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