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Updated: Feb 4, 2026
06:58
A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
Published on: November 6, 2015
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Economic benefits of microprocessor controlled prosthetic knees: a modeling study
Christine Chen1, Mark Hanson1, Ritika Chaturvedi2
1RAND Corporation, 1776 Main Street, Santa Monica, CA, 90401, USA.
Journal of Neuroengineering and Rehabilitation
|September 27, 2018
Summary
Microprocessor-controlled knees (MPK) offer significant clinical benefits for amputees, including fewer falls and improved quality of life. Despite higher initial costs, MPKs demonstrate cost-effectiveness over time, justifying their value to payers.
Area of Science:
- Prosthetics and Biomechanics
- Health Economics
- Clinical Outcomes Research
Background:
- Advanced prosthetic knees enhance mobility and quality of life for amputees.
- Payers are increasingly scrutinizing the value proposition of microprocessor-controlled knees (MPK).
- This study evaluates the clinical and economic differences between MPKs and non-microprocessor controlled knees (NMPK).
Purpose of the Study:
- To assess the differential clinical outcomes and cost-effectiveness of MPKs compared to NMPKs.
- To provide evidence for payers regarding the value of advanced prosthetic knee technology.
Main Methods:
- A comprehensive literature review of clinical and economic impacts of prosthetic knees.
- Technical expert panel meetings to gather insights.
- A 10-year simulation model for unilateral transfemoral amputees (Medicare Functional Classification Level 3 and 4).
- Calculation of Incremental Cost-Effectiveness Ratio (ICER) from a societal perspective.
Main Results:
- MPKs significantly reduce injurious falls (82 major, 62 minor per 100 persons) and osteoarthritis incidence (16 per 100 persons) over 10 years.
- MPKs are associated with 11 lives saved per 100 persons over a decade.
- While increasing device costs, MPKs reduce direct and indirect healthcare costs, yielding an ICER of $11,606 per Quality-Adjusted Life Year (QALY).
Conclusions:
- Microprocessor-controlled knees (MPKs) provide substantial clinical advantages for transfemoral amputees over non-microprocessor controlled knees (NMPKs).
- The economic benefits and cost-effectiveness of MPKs are comparable to or exceed those of other reimbursed medical technologies.
- MPKs represent a valuable investment for improving patient outcomes and long-term healthcare economics.
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