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Techniques for Prosthetic Vacuum Pump Characterization

This study aims to identify key pump-performance metrics and develop techniques for characterizing the evacuation performance of prosthetic vacuum pumps. Assessing various electrical and mechanical pumps using sensitivity analysis can guide clinicians in product choice for vacuum-assisted suspension systems in prosthetic clinical practices. The results demonstrate sensitivity to pump types and setting adjustments, with potential for future improvements in testing mechanical vacuum pumps. These techniques hold promise as standards for evaluating prosthetic vacuum pump devices.

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Techniques for Prosthetic Vacuum Pump Characterization

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  1. Methods for characterization of mechanical and electrical prosthetic vacuum pumps Oluseeni Komolafe, PhD; Sean Wood, MS; Ryan Caldwell, CP; Andrew Hansen, PhD; Stefania Fatone, PhD, BPO(Hons)

  2. Aim • Identify important pump-performance metrics and develop techniques to characterize evacuation performance of prosthetic vacuum pumps. • Relevance • Despite increasingly widespread adoption of vacuum-assisted suspension systems in prosthetic clinical practices, gaps exist in the scientific knowledge guiding clinicians’ choices of existing products.

  3. Method • Sensitivity of proposed techniques were assessed by characterizing evacuation performance of prosthetic pumps in bench-top testing : • 2 electrical (Harmony e-Pulse and LimbLogic VS). • 3 mechanical (Harmony P2, Harmony HD, and Harmony P3). • 5 fixed volume chambers (33 to 197 cm3) were used to represent different air volume spaces between prosthetic socket and liner-clad residual limb. • All measurements were obtained at 57.6 kPa vacuum gauge pressure.

  4. Results • Proposed techniques demonstrated sensitivity to: • Different electrical and mechanical pumps. • To a lesser degree, different setting adjustments. • Sensitivity was less pronounced for mechanical pumps. • Future improvements for testing of mechanical vacuum pumps were proposed.

  5. Conclusion • Study demonstrates techniques feasible as standards for assessing evacuation performance of prosthetic vacuum pump devices.

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