Disclosures: Kyle A. Chapman, MD: No financial relationships or conflicts of interest

Objective: During ambulation, amputees have a greater metabolic demand; medial-lateral center of mass (COM) displacement has been shown to be a good predictor of metabolic demand (1). This study was performed to determine if applying K3 prosthetic feet or components to K2 level ambulators results in improved mobility and functional outcomes.

Design: Higher-functioning limited community ambulators with transtibial amputations were selected by an interdisciplinary team to compare gait parameters and performance outcome measures comparing the different compontery. As a part of our multi-disciplinary amputee clinic, data is collected using a Motion Analysis Real Time System per our clinic’s GAAIT protocol. Heart rate is monitored using the Series 5 Apple Watch to calculate the energy expenditure per the Ebbeling equation. The measurements are compiled and retrospectively interpreted. Setting : Sinai of Baltimore Prosthetic Clinic Participants : Two right trans-tibial amputees

Interventions: Exchanging K2 componentry with K3 level componentry

Main Outcome Measures: Medio-lateral COM displacement, time up-and-go (TUG), 10-Meter Walk for Gait Speed: Self Selected (10-MWTSS) and Fast Speed (10-MWTFS), Six-Minute Walk tests (6MWT), and energy expenditure per Ebbeling equation.

Results: Participant-1: TUG test time was decreased by 23%, 10-MWTSS and 10-MWTFS velocities were increased by 20% and 22%, respectively. The 6MWT distance increased by 150ft. Medio-lateral COM displacement decreased by 3%. Per Ebbeling equation, there was a 13.5 % reduction in metabolic cost. Participant-2: TUG test time was decreased by 45%, 10-MWTSS and 10-MWTFS velocities were increased by 58% and 57%, respectively. The 6MWT distance increased by 683ft. Medio-lateral COM displacement decreased by 1% . Per Ebbeling equation, there was a 15 % reduction in metabolic cost. Conclusions: In our selected patients, higher-level prosthetic componentry was consistent with decreased energy expenditure and fall risk within the community, and improvements in functional mobility and endurance

Level of Evidence: Level III

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PM&R Meeting Abstracts - https://pmrjabstracts.org/abstract/gait-analysis-for-amputee-improvement-and-treatment-gaait-a-pilot-study/