Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Jun 18:9:20556683221101623.
doi: 10.1177/20556683221101623. eCollection 2022 Jan-Dec.

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

Taavy A Miller  1   2 , James H Campbell  1 , Dwiesha L England  1 , Phillip M Stevens  1   3 , Shane R Wurdeman  1
Affiliations

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

Taavy A Miller et al. J Rehabil Assist Technol Eng. .

Abstract

Introduction: Recently, many prosthetic devices were subjected to reimbursement coding review. Several prosthetic feet that were historically coded with the shock-attenuating function were recoded. The purpose of this analysis was to compare patient-reported functional mobility across a range of prosthetic feet using real-world clinical outcomes data.

Methods: A retrospective, observational review. A univariate generalized linear model was used to assess mobility across foot categories and between different prosthetic feet coded as L5987 or L5981.

Results: The final sample analyzed comprised of 526 individuals and four mutually exclusive categories of feet examined across a total of 10 different prosthetic foot types. The comparison of prosthetic foot categories were significantly different from the control category (i.e. historically L5981).

Conclusions: The current data suggest the development of some prosthetic foot designs using advanced materials and geometric designs can provide comparable functional benefits as those with distinct shock absorbing mechanical features. Emphasizing functional performance over visible features may be a pathway towards higher performance for the end user.

Keywords: amputees; mobility; outcomes; prosthesis foot type; prosthetic feet.

PubMed Disclaimer

Conflict of interest statement

Declaration of conflicting interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Figures

Figure 1.
Figure 1.
There was a significant effect for foot category when comparing mobility estimates while controlling for covariates predicted applying a linear regression model. Post-hoc analysis showed the Sustained-87 category to be significantly greater than the Original-81 category (p < .0001). Notably, there were no statistical differences between the Sustained-87 and Modified categories (p = .55), or between the Modified and Not-Reviewed (p = .62).
Figure 2.
Figure 2.
Effect plot visualizes the predicted values of mobility while controlling for covariates, estimates generated from linear regression. Specific make and model of feet within each category performed fairly consistent although there were exceptions. The Fillauer All-Pro within the Modified category performed similar to the feet within the Sustained-87 category and seemed to overall increase the average performance of the feet grouped in the Modified category. The Ossur Vari-Flex LP, although there was large variability, seems to be performing better than the other feet within the Original-81 category.
See this image and copyright information in PMC

References

    1. Perry J. Gait Analysis: Normal and Pathological Function. In: Charles B. (ed). Thorofare, NJ: Slack, Inc., 1992.
    1. Winter DA. The Biomechanics and Motor Control of Human Gait: Normal, Elderly and Pathological. 2nd ed. Waterloo, ON: University of Waterloo Press, 1991.
    1. Tagawa Y, Shiba N, Miyazaki K, et al. Bioengineering. Effects of knee and ankle movements on foot impact forces in human walking. JSME Int J Ser C 2001; 44(4): 1089–1096.
    1. Devan H, Hendrick P, Hale L, et al. Exploring factors influencing low back pain in people with nondysvascular lower limb amputation: a national survey. PM&R 2017; 9(10): 949–959. - PubMed
    1. Gard SA, Konz RJ. The effect of a shock-absorbing pylon on the gait of persons with unilateral transtibial amputation. J Rehabil Res Develop 2003; 40(2): 111. - PubMed

LinkOut - more resources