Split flexor carpi ulnaris transfer: a new functioning free muscle transfer with independent dual function

Area of Science:

• Reconstructive surgery
• Microsurgery
• Neuroplasticity

Background:

• Free muscle transfer is a standard procedure for restoring upper limb function.
• Splitting muscles based on neural anatomy can enable dual function restoration.
• This technique offers potential for improved functional recovery in complex cases.

Observation:

• A patient with complete forearm extensor muscle loss and radial nerve injury underwent a free split muscle transfer.
• The flexor carpi ulnaris muscle was split into two functional compartments.
• The transfer aimed to restore independent thumb and finger extension.

Findings:

• The patient achieved independent thumb and finger extension nine months post-surgery.
• This represents the first successful free split muscle transfer for dual independent function in the upper limb.
• The procedure effectively addressed significant functional deficits due to nerve injury.

Implications:

• This technique expands the possibilities for functional restoration in patients with severe limb injuries.
• It highlights the potential of targeted muscle splitting for complex reconstructive challenges.
• Further research may validate this approach for broader clinical application in upper limb reconstruction.