Dataset Information

A novel portable sensor to monitor bodily positions and activities in transtibial prosthesis users.

ABSTRACT:

Background

Step activity monitors provide insight into the amount of physical activity prosthesis users conduct but not how they use their prosthesis. The purpose of this research was to help fill this void by developing and testing a technology to monitor bodily position and type of activity.

Methods

Thin inductive distance sensors were adhered to the insides of sockets of a small group of transtibial prosthesis users, two at proximal locations and two at distal locations. An in-lab structured protocol and a semi-structured out-of-lab protocol were video recorded, and then participants wore the sensing system for up to 7 days. A data processing algorithm was developed to identify sit, seated shift, stand, standing weight-shift, walk, partial doff, and non-use. Sensed distance data from the structured and semi-structured protocols were compared against the video data to characterize accuracy. Bodily positions and activities during take-home testing were tabulated to characterize participants' use of the prosthesis.

Findings

Sit and walk detection accuracies were above 95% for all four participants tested. Stand detection accuracy was above 90% for three participants and 62.5% for one participant. The reduced accuracy may have been due to limited stand data from that participant. Step count was not proportional to active use time (sum of stand, walk, and standing weight-shift times).

Interpretation

Step count may provide an incomplete picture of prosthesis use. Larger studies should be pursued to investigate how bodily position and type of activity may facilitate clinical decision-making and improve the lives of people with lower limb amputation.

SUBMITTER: Mertens JC

PROVIDER: S-EPMC10545288 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Publications

A novel portable sensor to monitor bodily positions and activities in transtibial prosthesis users.

Mertens Joseph C JC Brzostowski Jacob T JT Vamos Andrew A Allyn Katheryn J KJ Hafner Brian J BJ Friedly Janna L JL DeGrasse Nicholas S NS Ballesteros Daniel D Krout Adam A Larsen Brian G BG Garbini Joseph L JL Sanders Joan E JE

Clinical biomechanics (Bristol, Avon) 20220817

<h4>Background</h4>Step activity monitors provide insight into the amount of physical activity prosthesis users conduct but not how they use their prosthesis. The purpose of this research was to help fill this void by developing and testing a technology to monitor bodily position and type of activity.<h4>Methods</h4>Thin inductive distance sensors were adhered to the insides of sockets of a small group of transtibial prosthesis users, two at proximal locations and two at distal locations. An in- ...[more]

PMID: 36041309

Similar Datasets

Project description:BackgroundThere exists a need for an adjustable socket to accommodate residual limb volume and shape changes. Further, limb loss rates globally are rising and there is a large unmet need for affordable and accessible prosthetic systems.ObjectiveTo assess the utility of an immediate fit modular prosthetic system (iFIT Prosthetics, LLC).DesignProspective feasibility study involving a 2-week single-group pre-post intervention study.SettingPhysical Medicine and Rehabilitation gait laboratory.ParticipantsParticipants were at least 6 months post amputation and walking with a conventional prosthesis. They were free of skin wounds, other neurological disorders, and severe pain conditions.MethodsParticipants were fit with an immediate fit prosthesis and instructed to wear it for a 2-week evaluation period. They were given a progressive wearing schedule and they completed outcome measurements at the 2-week follow-up.Main outcome measurementsSelf-reported satisfaction, gait biomechanics, and intrasocket peak pressures.ResultsTwenty-six participants entered the study, with 22 completing the single group pre-post study. They averaged 50 years (SD ±10.2) of age; four were female. Sixteen were dysvascular and 10 were traumatic in etiology. Significant differences (P = .03) in self-reported satisfaction were found in favor of the iFIT device 29.33 (SD ± 4.51) versus the conventional device 25.52 (SD ± 6.8). No falls or limb ischemia were reported. Gait biomechanics revealed no differences across any temporal characteristics. Intrasocket peak pressures were significantly lower for the iFIT prostheses overall (P = .0014), at the anterior tibia (P = .0002), and the lateral side of the residual limb (P = .013).ConclusionsThe iFIT transtibial prosthetic system appears to be safe in this short-term single-group pre-post study. This study provided preliminary evidence to support the feasibility of the iFIT system. It compared favorably to participants' conventional prostheses across all outcome measures. With its cost, adjustability, and accessibility advantages, this device may prove useful for persons with transtibial amputations. A larger multicenter study is needed to confirm these results.Level of evidenceIII.

Dataset Information

A novel portable sensor to monitor bodily positions and activities in transtibial prosthesis users.

Background

Methods

Findings

Interpretation

Publications

A novel portable sensor to monitor bodily positions and activities in transtibial prosthesis users.

Similar Datasets

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