OASIS 1: Retrospective analysis of four different microprocessor knee types

Abstract

Introduction Microprocessor knee analyses to date have been primarily limited to microprocessor knees as a category rather than comparisons across different models. The purpose of the current analysis was to compare outcomes from four common knee models. Methods A retrospective analysis of clinical outcomes was performed. Outcomes for functional mobility, quality of life, satisfaction with amputee status, and injurious falls were compared. Specific knee types represented were C-Leg (Ottobock), Orion (Blatchford), Plié (Freedom Innovations), and Rheo (Össur). Results Outcomes from 602 individuals were included. No significant differences were noted for functional mobility (H = 2.91, p = 0.406) or satisfaction (H = 4.43, p = 0.219). For quality of life, differences existed for C-Leg versus Plié (p = 0.010). For injurious falls, C-Leg (χ2(1,137) = 10.99, p < 0.001) and Orion (χ2(1,119) = 4.34, p = 0.037) resulted in significantly reduced injurious falls compared to non-microprocessor knee users. C-Leg (H = 19.63, p < 0.001) and Plié (H = 14.04, p = 0.003) users saw declines with advanced aging. Conclusions Our data indicate relative parity among the 4 microprocessor knees with regard to functional mobility and satisfaction. In contrast to mobility, neither satisfaction nor quality of life values reflected declines with aging. Finally, when compared to non-microprocessor knees, significant differences were observed across the microprocessor knee types in relation to the reduction of injurious falls. Keywords: MPK, mobility, quality of life, falls, amputee, outcomes

Load applied on osseointegrated implant by transfemoral bone-anchored prostheses fitted with state-of-the-art prosthetic components

“…In principle, BAP fitted with MPKs and ESARs could increase stability (e.g., stance and swing control), walking capacity (e.g., high range of motion, mechanically-powered push off), attenuation of excessive loading during daily activities (e.g., auto adaptive stance and swing phases) and reduce risks of falls (e.g., automatic stumble recovery) (Campbell et al, 2020;Frossard, 2013;Highsmith et al, 2010;Kahle et al, 2008;Orendurff et al, 2006;Sawers and Hafner, 2013). One could hypothesise that these functions altogether might generate a loading profile within the Goldilocks Zone for the osseointegrated implant.…”

OASIS 2: Mobility differences with specific prosthetic feet across procedure codes

“…The PLUS-M instrument is described in detail in prior work, but briefly, the instrument was administered in the 12-item short form (v1.2). 17 , 18 The instrument assesses mobility on 12 different tasks. The result is a raw score that is converted to a calibrated T-Score on a continuous scale ranging from 0–100, with 50.0 representing the population average score.…”

Trends and Opportunities in Health Economic Evaluations of Prosthetic Care Innovations

“…12 Since, studies showed that the use and satisfaction of prosthetic lower limb could be significantly improved when using advanced components such microprocessor-controlled knees compared to a nonmicroprocessor-controlled knees. 9,13, 14 Satisfactory prosthetic fitting might be compromised because of incongruous shapes of residuum (e.g., length, bulbous, volume change) and/or skin issues. [15][16][17] Paterno et al (2018) and Meulenbelt et al (2009) report that that 63-82% of lower limb amputees have problems with skin lesions.…”