Effect of a Microprocessor-controlled Prosthetic Knee Joint on K2 Level Ambulators

Launched by VA OFFICE OF RESEARCH AND DEVELOPMENT · Jul 31, 2025

Keywords

ClinConnect Summary

This clinical trial is studying whether a special type of prosthetic knee, called a microprocessor-controlled knee (MPK), can help Veterans who have had an above-knee amputation walk better and feel better compared to the more traditional prosthetic knees that don’t have this technology. The MPK can automatically adjust how the knee moves to make walking easier and safer. The study will look at both physical benefits, like improved walking, and psychological benefits, such as how confident or comfortable participants feel using the new knee.

To take part, Veterans need to be between 45 and 85 years old, have had an amputation above one knee (not both legs), and have been using a regular prosthetic knee for at least a year. They should have a certain level of walking ability (called K2 level), good feeling and skin condition on their residual limb, and a well-fitting prosthetic socket. Participants will be tested twice: first while using their current knee, and then again after using the new MPK for two months. This study is not yet recruiting, but it will take place at two VA hospitals. If eligible, participants can expect to try the advanced knee and have their walking and well-being evaluated to see if the new technology makes a meaningful difference.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Unilateral, transfemoral amputation (any etiology).
• • Age from 45-85 years.
• • Residual limb length classified as standard (i.e., medium) to long.
• • Prosthesis user for at least 1 year prior to enrolling in the study.
• • K2-level classification while using their NMPK.
• • Good sensation on their residual limb.
• • Good skin integrity upon visual inspection.
• • Presents with good socket fit based upon a standard assessment by the study prosthetist.
• Exclusion Criteria:
• • Bilateral leg amputations.
• • Individuals with a knee disarticulation.