What is the minimum muscle strength grade required for a tendon transfer?

What is the minimum muscle strength grade required for a tendon transfer?

• A. 3
• B. 5
• C. 4
• D. 2

Answer: (C)

A tendon transfer needs a donor muscle that can generate enough pull to power the new tendon path. On the muscle strength scale, 4/5 means the muscle is active against gravity and can resist some resistance, which provides the needed force to move the transferred tendon during early rehab and daily activities. If the donor muscle is only 3/5 (against gravity), it can’t reliably produce the necessary force, risking poor function or failure of the transfer. A 5/5 is stronger than necessary as a minimum, and lower grades (2/5 or 1/5) would be insufficient. Therefore, the minimum strength needed is 4/5.

A tendon transfer needs a donor muscle that can generate enough pull to power the new tendon path. On the muscle strength scale, 4/5 means the muscle is active against gravity and can resist some resistance, which provides the needed force to move the transferred tendon during early rehab and daily activities. If the donor muscle is only 3/5 (against gravity), it can’t reliably produce the necessary force, risking poor function or failure of the transfer. A 5/5 is stronger than necessary as a minimum, and lower grades (2/5 or 1/5) would be insufficient. Therefore, the minimum strength needed is 4/5.