Planning around vital nerves and vessels

These operations may remove compression, repair or reroute a nerve, restore movement or rebuild sensation. They require anatomical mapping, an appropriate approach, magnification and systematic assessment of nerve function.

Thoracic outlet syndrome

In thoracic outlet syndrome, the brachial plexus or subclavian vessels may be compressed between the neck, first rib and shoulder. Neurogenic, venous and arterial forms require different assessment.

Neurogenic decompression may include scalenectomy, removal of fibrous bands, brachial plexus neurolysis, pectoralis minor release and, when indicated, first- or cervical-rib resection. The operation is not identical for every patient.

Preoperative thoracic outlet planning — **TOS planning:** marking anatomy and the surgical approach.

Controlled exposure around the brachial plexus and vessels — **Thoracic outlet decompression:** vessel loops help identify and protect vital structures.

**Brachial plexus neurolysis:** controlled release around the plexus.

First rib segments after resection — **First-rib resection:** performed only when anatomy and clinical findings support it.

Facial movement and smile reconstruction

Planning depends on the duration of paralysis, viability of facial muscles, nerve continuity and available donor nerves. When native muscles remain viable, repair or nerve transfer may be used; longstanding paralysis may require a free functioning muscle such as gracilis, with microsurgical vascular and neural connections.

Facial reanimation planning after facial palsy — **Facial reanimation planning:** surgical routes and the intended vector are marked.

Free functioning muscle transferred to the face — **Free functional muscle transfer:** the transferred muscle before completion of positioning and connections.

Read the complete facial synkinesis guide

Nerve decompression

Neurolysis is used when an intact nerve is compressed in a narrow anatomical passage or trapped by scar. The nerve is identified in healthy tissue and followed through the full zone of compression while its blood supply and branches are protected.

Ulnar nerve decompression and anterior transposition planning — **Ulnar nerve planning:** marking the nerve and planned decompression/transposition approach.

Nerve transfers and TMR

A nerve transfer connects a functioning donor nerve or fascicle to a denervated recipient to bring viable axons closer to a motor or sensory target. Donor cost, timing, muscle viability and axon numbers guide selection.

In targeted muscle reinnervation (TMR), a sensory nerve end is connected to a small expendable motor branch after neuroma management. Complex reconstruction may combine repair, grafting, tendon transfer or free functional muscle transfer.

Microsurgical peripheral nerve reconstruction under magnification — **Microsurgical reconstruction:** magnification supports precise dissection and coaptation.

Donor and recipient nerves prepared for foot drop nerve transfer — **Nerve transfer for foot drop:** donor and recipient preparation before coaptation.

Bertelli distal nerve transfer planning — **Bertelli distal transfer:** approach planning for selected ulnar motor injuries.

TMR connection of sensory nerve to a small motor branch — **TMR principle:** giving regenerating axons a nearby biological target.

Explore lower-extremity nerve transfers

How the operation is selected

Define compression, transection, neuroma, motor loss or sensory loss.
Localize the lesion and determine whether the distal target remains reconstructable.
Select decompression, direct repair, graft, nerve transfer, TMR or a combined reconstruction.
Plan rehabilitation and follow-up around nerve-regeneration time and the restored action.

Technical complexity is never an indication by itself. Surgery needs a clear functional or therapeutic goal and a reasonable balance of potential benefit and risk.

Selected references

Illig KA, Donahue D, Duncan A, et al. Reporting standards of the Society for Vascular Surgery for thoracic outlet syndrome. Journal of Vascular Surgery. 2016;64(3):e23–e35. doi:10.1016/j.jvs.2016.04.039
Borschel GH, Kawamura DH, Kasukurthi R, et al. The motor nerve to the masseter muscle. JPRAS. 2012;65(3):363–366. doi:10.1016/j.bjps.2011.09.026
Ray WZ, Mackinnon SE. Management of nerve gaps. Experimental Neurology. 2010;223(1):77–85. doi:10.1016/j.expneurol.2009.03.031

Complex Peripheral Nerve and Microsurgical Procedures Performed by Dr Ayman Khoury