A patient undergoes trans-femoral (above-knee) amputation for a diabetic vascular complication. In prosthetic prescription, microprocessor-controlled knee joints (C-Leg) are particularly advantageous in which patient profile?

• A K1 ambulators (household only, with walker)
• B K2 limited community ambulators with low energy needs
• C All trans-femoral amputees regardless of activity level
• D K3–K4 community ambulators with variable cadence and activity demands ✓

Explanation

Medicare K-level classification grades prosthetic rehabilitation potential: K1 (household only), K2 (limited community), K3 (unlimited community with variable cadence), K4 (high activity/sports). Microprocessor-controlled prosthetic knees (C-Leg, Rheo Knee) use sensors and hydraulic control to adapt swing and stance phase to varying walking speeds, reducing stumble/fall risk on slopes and uneven terrain. These devices are most beneficial for K3–K4 patients who walk at variable speeds. K1–K2 patients derive less benefit proportional to high cost.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.