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Fluid Volume Changes in Transtibial Amputees: Activity Influence Study

Study on how walking, standing, and resting impact residual limb fluid volume in transtibial amputees. Results show varying responses, highlighting need for personalized volume accommodation technologies.

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Fluid Volume Changes in Transtibial Amputees: Activity Influence Study

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  1. How do walking, standing, and resting influence transtibial amputee residual limb fluid volume? Joan E. Sanders, PhD; John C. Cagle, BSE; Katheryn J. Allen, CPO; Daniel S. Harrison, BS; Marcia A. Ciol, PhD

  2. Aim • Determine how fluid volume changes in residual limbs of people with transtibial amputation were affected by activity. • Relevance • The nature of activity is important when considering volume-accommodation strategies.

  3. Method • Residual limb extracellular fluid volume was measured using biompedance analysis in 24 participants during test sessions with equal durations of resting, standing, and walking.

  4. Results • All subjects lost fluid volume during standing with equal weight-bearing. • 16 subjects gained fluid volume during standing. • 15 subjects gained fluid volume during rest. • Strong correlation between walk and rest fluid volume changes. • Sit-to-stand and stand-to-sit transitioning: • Minimal changes for subjects with peripheral arterial disease. • Large changes for healthy female subjects.

  5. Conclusion • Differences in fluid volume response among subjects suggest that volume accommodation technologies should be matched to activity-dependent fluid transport characteristics of individual prosthesis user.

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