Benchmark data for elderly, vascular trans-tibial amputees after rehabilitation

Hubbard, Wendy; Mcelroy, G.K.

doi:10.3109/03093649409164399

Cited by 20 publications

(8 citation statements)

References 9 publications

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“…The investigated walking speed ranged from 0.8 [43] to 1.84 m/s [27], from 0.85 [38] to 1.39 m/s [28,32] and from 0.5 [24] to 1.75 m/s [23] for the SACH, ESAR, and PWR ankle-foot units (Fig 2). Furthermore, the results of the peak ankle push-off power ranged from 0.2 [30] to 1.01 W/kg [27], from 0.71 [37] to 2.89 W/kg [32], and from 0.88 [24] to 4.2 W/kg [23] for the SACH, ESAR and PWR ankle-foot units (Fig 2).…”

Section: Resultsmentioning

confidence: 99%

Prosthetic push-off power in trans-tibial amputee level ground walking: A systematic review

et al. 2019

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ObjectiveUnilateral trans-tibial amputation signifies a challenge to locomotion. Prosthetic ankle-foot units are developed to mimic the missing biological system which adapts push-off power to walking speed in some new prosthetic ankle-foot designs. The first systematic review including the two factors aims to investigate push-off power differences among Solid Ankle Cushion Heel (SACH), Energy Storage And Return (ESAR) and Powered ankle-foot units (PWR) and their relation to walking speed. Data sourcesA literature search was undertaken in the Web of Science, PubMed, IEEE xplore, and Google Scholar databases. The search term included: ampu* AND prosth* AND ankle-power AND push-off AND walking. Study appraisal and synthesis methodsStudies were included if they met the following criteria: unilateral trans-tibial amputees, lower limb prosthesis, reported analysis of ankle power during walking. Data extracted from the included studies were clinical population, type of the prosthetic ankle-foot units (SACH, ESAR, PWR), walking speed, and peak ankle power. Linear regression was used to determine whether the push-off power of different prosthetic ankle-foot units varied regarding walking speed. Push-off power of the different prosthetic ankle-foot units were compared using one-way between subjects' ANOVAs with post hoc analysis, separately for slower and faster walking speeds. Results474 publications were retrieved, 28 of which were eligible for inclusion. Correlations between walking speed and peak push-off power were found for ESAR (r = 0.568, p = 0.006) and PWR (r = 0.820, p = 0.000) but not for SACH (r = 0.267, p = 0.522). ESAR and PLOS ONE | https://doi.org/10.1371/journal.pone. Funding:The funders, Klinikum Bayreuth GmbH (https://klinikum-bayreuth.de/) and Ossur hf. (https://www.ossur.com/?select-default-destination=1), provided support in the form of salaries for authors R.M., L.M., R.A. and K.L., but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of PWR demonstrated significant differences in push-off power for slower and faster walking speeds (ESAR (p = 0.01) and PWR (p = 0.02)). ConclusionPush-off power can be used as a selection criterion to differentiate ankle-foot units for prosthetic users and their bandwidth of walking speeds.Prosthetic push-off power in trans-tibial amputee walking PLOS ONE | https://doi.org/10.

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Section: Resultsmentioning

confidence: 99%

Prosthetic push-off power in trans-tibial amputee level ground walking: A systematic review

et al. 2019

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“…Hubbard and McElroy found, in a group of 20 elderly, vascular amputees, step length symmetry and preferred walking speed were positively and significantly associated and peak hip power was significantly related to gait speed. 5…”

Section: Discussionmentioning

confidence: 99%

“…Traditional manual muscle testing or dynamometry assisted muscle testing of hip musculature presents the same problem, sufficiently challenging a muscle that is capable of producing forces above body weight. However, hip muscle strength, as a measure of impairment has been measured in other ways 5,6,9 through the performance of a task, such as the ability to descend into a chair, which requires sufficient strength in several muscle groups to perform properly. 8,9…”

Section: Methodsmentioning

confidence: 99%

Impairment Variables Predicting Activity Limitation in Individuals with Lower Limb Amputation

Raya

Gailey

Fiebert

et al. 2010

Prosthetics &Amp; Orthotics International

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The purpose of this study was to determine whether measures of impairment (i.e., muscle strength, balance), personal factors (i.e., comorbidities, demographic information) and amputation specific variables (i.e., time since amputation, cause of amputation, level of amputation) were able to predict performance on the six-minute walk test, a measure of activity limitation, in individuals with lower limb amputation. A total of 72 individuals with lower limb amputation ranging in age from 21-83 were tested for balance, limb muscle strength and function. Medical comorbidities were recorded and activity limitation was measured using the six-minute walk test. Data were analyzed and multivariate relationships were examined using multiple linear regression. Impairment variables of strength, balance, subject demographics, time since amputation, cause of amputation and level of amputation were all significant predictors and explained 72% of the variance in the outcome variable. Strength of the hip extensors was the strongest predictor, accounting for 30.9% of the total variance. Multiple factors impact six minute walk scores in individuals with lower limb amputation. Impairments in hip strength and balance appear to be the two most significant. The findings of this study support the use of the six-minute walk test to underscore impairments of the musculoskeletal system that can affect ambulation ability in the amputee.

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“…34 On face validity, descriptive analysis appeared to support Day's 34 contention that amputees have a fairly accurate assessment of their activity level and supported his conclusions that amputees with higher AAS scores walked more. Hubbard and McElroy 50 found that the preferred walking speed of persons with vascular transtibial amputation correlated highly with the AAS. For the purposes of the present study, we modified the AAS's original text, which used terms familiar to residents of the United Kingdom, to terms more typically used in the United States.…”

Section: Other Instrumentsmentioning

confidence: 99%

The Amputee Mobility Predictor: An instrument to assess determinants of the lower-limb amputee's ability to ambulate

Gailey

Roach

Applegate

et al. 2002

Archives of Physical Medicine and Rehabilitation

335

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Objectives: To describe the development of the Amputee Mobility Predictor© (AMP) instrument designed to measure ambulatory potential of lower-limb amputees with (AMPPRO) and without (AMPnoPRO) the use of a prosthesis, and to test its reliability and validity. Design: Measurement study using known groups method and concurrence with existing measures. Setting: Academic medical center. Participants: A convenience sample of 191 lower-limb amputee subjects who had completed prosthetic training, 24 in the reliability study (mean age Ϯ standard deviation, 68.3Ϯ17.9y, range, 28-99y) and 167 in the validity study (mean age, 54.8Ϯ18.6y; range, 18-100y). Interventions: Not applicable. Main Outcome Measures: Intra-and interrater reliability; construct validy by known groups method; concurrent validity by comparisons with 6-minute walk test, Comorbidity Index, age, and time since amputation; predictive validity by comparison with 6-minute walk test after controlling for other factors. Results: Interrater reliability was .99 for subjects tested with and without their prosthesis; intrarater reliability was .96 and .97. Both the AMPnoPRO (PϽ.0001) and the AMPPRO scores (PϽ.0001) distinguished among the 4 Medicare functional classification levels. The AMP correlated strongly with 6-minute walk scores (AMPnoPRO rϭ.69, PϽ.

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Benchmark data for elderly, vascular trans-tibial amputees after rehabilitation

Cited by 20 publications

References 9 publications

Prosthetic push-off power in trans-tibial amputee level ground walking: A systematic review

Prosthetic push-off power in trans-tibial amputee level ground walking: A systematic review

Impairment Variables Predicting Activity Limitation in Individuals with Lower Limb Amputation

The Amputee Mobility Predictor: An instrument to assess determinants of the lower-limb amputee's ability to ambulate

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