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Beyond step counts: Including wear time in prosthesis use assessment for lower-limb amputation.

Nicholas S DeGrasse1, Joseph C Mertens1, Jacob T Brzostowski1

  • 1Department of Bioengineering, University of Washington, Seattle, WA, USA.

Journal of Rehabilitation and Assistive Technologies Engineering
|March 20, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel activity monitor for prosthesis users, tracking wear time and activity intensity. Findings reveal varied doffing patterns and activity types, offering insights for improved patient care and prosthesis use.

Keywords:
Amputeesbiomechanical testinglimb prostheticsmotion/posture analysisrehabilitationsensors/sensor applications

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Area of Science:

  • Biomechanics
  • Rehabilitation Engineering
  • Prosthetics

Background:

  • Effective prosthesis use requires understanding wear patterns and activity levels.
  • Current methods for monitoring prosthesis use are limited in detail and duration.
  • Assessing ambulatory activity and accommodation practices is crucial for patient rehabilitation.

Purpose of the Study:

  • To evaluate a new activity monitor for tracking prosthesis wear duration and activity.
  • To analyze prosthesis users' wear and accommodation practices, including temporary doffing.
  • To assess the intensity and nature of ambulatory activities performed with a prosthesis.

Main Methods:

  • A portable limb-socket motion sensing system was employed.
  • Monitoring included prosthesis doffs, walk bouts (≥5 steps), low locomotion (2-4 steps), stationary positions, and weight shifts.
  • Investigated the relationship between doff time and active motion time, comparing durations of different activity intensities.

Main Results:

  • Median prosthesis wear duration ranged from 12.8-18.8 hours daily across 14 participants.
  • Most participants (11/14) doffed five or fewer times daily; three doffed 10+ times.
  • Nine participants showed a positive correlation between daily doff duration and active motion duration.
  • Activity patterns varied, with some users spending more time in weight shifts and others in walk bouts.

Conclusions:

  • Monitoring prosthesis don time, temporary doffs, and differentiating activities like weight shifts from walks offers valuable clinical insights.
  • Further long-term monitoring studies are recommended to evaluate the clinical utility of this data.
  • The novel activity monitor shows potential for enhancing patient care and understanding prosthesis integration.