In below-knee (transtibial) amputation, the optimal tibial stump length for best prosthetic fitting and function — balancing lever arm length with tissue coverage — is:

• A As short as possible — very short stumps provide the best prosthetic fitting
• B Full tibial length preserving the ankle for energy storage
• C 5 cm only — the 'short stump' amputation is universally preferred
• D 12–15 cm from the tibial tuberosity (approximately 50% of the tibial length) ✓

Explanation

A tibial stump of 12–15 cm from the tibial tuberosity (roughly 50% tibial length) provides an optimal balance: sufficient lever arm length for efficient prosthetic limb control and ambulation, while ensuring adequate soft tissue coverage with a well-padded posterior myoplastic flap. Very short stumps (<5 cm) have limited lever arm and are difficult to fit prosthetically; very long stumps approach the ankle, have inadequate posterior soft tissue coverage, and may compromise the integrity of the vascular supply to the skin flap. The posterior (gastrocnemius-based) long posterior myoplastic flap is used to achieve padded end-bearing stump closure.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

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Written and medically reviewed by the StethoPrep medical team.