If a patient in a WHO: MP stop, IP extension assist orthosis recovers the ulnar nerve, how should the orthosis be modified?

The correct modification of the orthosis involves removing the metacarpophalangeal (MCP) stop and the interphalangeal (IP) extension assist specifically from the fourth and fifth digits. This adjustment is appropriate as it allows the patient to utilize the intrinsic muscle function of the hand, which is particularly relevant after recovering from ulnar nerve issues.

When a patient recovers from ulnar nerve injury, they often regain the ability to flex and extend their fingers more effectively, particularly at the ring and little fingers, which are primarily affected by ulnar nerve function. By removing the restrictions imposed by the MP stop and the IP extension assist, the patient can achieve more natural and functional hand movements, enhancing their ability to grasp and manipulate objects.

The other modification options do not directly address the specifics of the patient’s recovery from ulnar nerve damage. Adding IP flexion assist to digits 2-3 might not be necessary if those digits are functioning adequately, and changing to a wrist extension orthosis would not be appropriate since it would ignore the functional needs of the fingers. Similarly, replacing the orthosis with a custom forearm orthosis may be overly drastic when a simple modification would more accurately meet the patient's needs post