Peripheral Nerve Repair | Dr. Fang Yousheng (Hand & Nerve Surgery) | CMCS Shanghai

About Dr. Fang Yousheng

Dr. Fang Yousheng is a leading hand and peripheral nerve surgeon at Huashan Hospital, Fudan University — one of China's foremost centres for microsurgical reconstruction, peripheral nerve repair, and brachial plexus surgery, and a national reference institution for the management of complex traumatic nerve injuries. He is recognised for his extensive experience in nerve grafting, brachial plexus reconstruction, replantation surgery, and the surgical management of nerve compression syndromes including carpal tunnel and cubital tunnel release. Dr. Fang's clinical philosophy holds that brachial plexus injury — one of the most surgically demanding conditions in peripheral nerve surgery — requires a systematic approach to injury mapping, a thorough understanding of the available reconstructive options, and a commitment to individualised surgical planning that maximises the potential for functional recovery within the biological constraints of nerve regeneration. His department at Huashan Hospital has established one of Shanghai's most comprehensive peripheral nerve surgery programmes, combining intraoperative neurophysiological monitoring, microsurgical nerve grafting and transfer techniques, and structured postoperative rehabilitation into a unified care pathway for patients with traumatic brachial plexus injuries and other complex peripheral nerve disorders.

Case Overview

Mr. Li (pseudonym), a Chinese man, sustained a severe right brachial plexus injury in a road traffic accident, presenting with complete loss of right upper limb motor and sensory function and significant muscle wasting. Following emergency transfer to Huashan Hospital, Fudan University, Dr. Fang Yousheng conducted a detailed clinical assessment and imaging evaluation, establishing the extent and pattern of brachial plexus injury and formulating an individualised surgical plan. Mr. Li underwent brachial plexus exploration, neurolysis, nerve grafting where required, and functional reconstruction — a complex multi-stage microsurgical procedure performed under Dr. Fang's guidance. Following surgery, Mr. Li engaged in a structured rehabilitation programme including physiotherapy and occupational therapy. Over the course of his recovery, right upper limb motor and sensory function improved significantly, muscle wasting improved, and he regained the ability to perform activities of daily living including dressing and eating independently — representing a substantial restoration of function and quality of life. This case demonstrates Dr. Fang's expertise in the surgical management of complex traumatic brachial plexus injuries and the capacity of Huashan Hospital's peripheral nerve surgery programme to achieve meaningful functional recovery in one of the most challenging conditions in reconstructive surgery.

Patient Background

• Name / Nationality: Mr. Li (pseudonym) — Chinese male
• Mechanism of injury: Road traffic accident — severe right upper limb trauma with brachial plexus injury
• Chief Complaint: Complete loss of right upper limb motor and sensory function following road traffic accident; significant muscle wasting; inability to perform activities of daily living
• History of present illness: Mr. Li sustained a severe right upper limb injury in a road traffic accident. He presented with complete loss of motor function of the right upper limb — inability to flex the elbow, extend the wrist, or perform any hand function — combined with complete sensory loss across the right upper limb dermatomes. Significant muscle wasting was evident across the shoulder girdle, upper arm, and forearm musculature. Activities of daily living were severely impaired; the patient was dependent for dressing, eating, and personal hygiene. He was transferred to Huashan Hospital for specialist peripheral nerve surgical evaluation and management.
• Functional assessment at presentation: Right upper limb motor function: absent across all muscle groups tested; right upper limb sensory function: severely impaired across all dermatomes; muscle wasting: significant, involving shoulder girdle, upper arm, and forearm; activities of daily living: severely dependent; quality of life: substantially impaired

Diagnostic Workup

Clinical Examination

• Detailed neurological examination of the right upper limb: motor testing of all muscle groups supplied by the C5, C6, C7, C8, and T1 nerve roots; sensory testing across all upper limb dermatomes; assessment of deep tendon reflexes; Tinel's sign testing along the brachial plexus course
• Findings: complete motor and sensory deficit consistent with severe brachial plexus injury; pattern of deficit mapped to guide surgical planning

Imaging and Neurophysiological Studies

• MRI of the cervical spine and brachial plexus: Assessment of nerve root avulsion versus extraforaminal rupture; identification of pseudomeningoceles consistent with nerve root avulsion at affected levels; mapping of injury extent along the plexus
• CT myelography: Complementary assessment of nerve root avulsion pattern where MRI findings required clarification
• Electromyography (EMG) and nerve conduction studies: Baseline neurophysiological assessment of denervation pattern and residual motor unit activity; identification of preserved neural elements to guide reconstructive planning

Dr. Fang's pre-operative assessment: Brachial plexus injury is not a single diagnosis — it is a spectrum of injuries ranging from neurapraxia, which recovers spontaneously, to complete nerve root avulsion, which cannot be repaired by direct suture and requires nerve transfer from an extraplexal source. The first task in managing a brachial plexus injury is to map the injury precisely — to determine which roots are avulsed, which are ruptured in continuity, and which retain some preserved function. The MRI and CT myelography give us the anatomical picture; the EMG gives us the physiological picture; and the clinical examination integrates both. In this patient, the injury pattern and the imaging findings define the reconstructive options available. The surgical strategy must prioritise the most functionally important targets — elbow flexion first, then shoulder abduction, then wrist and hand function — because nerve regeneration is slow and the window for effective reinnervation of the target muscles is finite. Every decision in brachial plexus reconstruction is a trade-off between the available donor nerve sources, the distance to the target muscle, and the time available before irreversible motor endplate degeneration occurs. The goal is to restore as much function as possible within those biological constraints.

Diagnosis and Surgical Treatment Strategy

The diagnosis established by Dr. Fang Yousheng was Traumatic Right Brachial Plexus Injury — with the pattern and extent of injury defined by clinical examination, imaging, and neurophysiological assessment.

The surgical principle was: systematic brachial plexus exploration, neurolysis of preserved neural elements, nerve grafting to bridge ruptured segments, and nerve transfer from extraplexal donor sources to restore priority motor functions — prioritising elbow flexion, shoulder abduction, and progressive distal upper limb function.

Surgical procedure — Brachial Plexus Exploration, Neurolysis, Nerve Grafting, and Functional Reconstruction:

• Exploration: Systematic surgical exploration of the brachial plexus from the supraclavicular to the infraclavicular region; identification of all injured neural elements; intraoperative neurophysiological monitoring to assess preserved neural continuity
• Neurolysis: Release of scar tissue and perineural fibrosis compressing preserved neural elements; restoration of nerve gliding and decompression of partially injured fascicles
• Nerve grafting: Where nerve root rupture was identified without avulsion, interpositional nerve grafting performed using sural nerve or other suitable donor nerve to bridge the gap between the proximal and distal nerve stumps; microsurgical coaptation under magnification
• Nerve transfer (neurotisation): For avulsed nerve roots where direct repair was not possible, extraplexal nerve transfer performed — donor nerves selected based on expendability and proximity to target muscles; microsurgical end-to-end or end-to-side coaptation
• Functional reconstruction: Tendon transfers and other functional reconstructive procedures performed as indicated to augment neural reconstruction and restore priority upper limb functions

Postoperative rehabilitation protocol: Structured multidisciplinary rehabilitation programme initiated in the early postoperative period — physiotherapy for range-of-motion maintenance, oedema management, and progressive strengthening as reinnervation occurred; occupational therapy for activities of daily living retraining and adaptive equipment; serial neurophysiological monitoring to track reinnervation progress; long-term follow-up with surgical team for assessment of functional recovery and planning of any secondary reconstructive procedures.

Treatment Course and Outcomes

Intraoperative

• Brachial plexus exploration, neurolysis, nerve grafting, and functional reconstruction performed without complication under Dr. Fang's guidance; intraoperative neurophysiological monitoring confirmed preserved neural continuity in partially injured elements; microsurgical nerve coaptation achieved under magnification; estimated blood loss within acceptable limits; no intraoperative complications

Postoperative Recovery

• Mr. Li engaged fully with the structured postoperative rehabilitation programme; physiotherapy and occupational therapy commenced in the early postoperative period
• Progressive improvement in right upper limb motor and sensory function observed over the course of rehabilitation — consistent with the expected timeline of peripheral nerve regeneration (approximately 1 mm per day from the repair site to the target muscle)
• Muscle wasting: progressive improvement with reinnervation and active rehabilitation
• Functional recovery: Mr. Li regained the ability to perform activities of daily living including dressing and eating independently — representing a substantial restoration of upper limb function and quality of life
• Patient highly satisfied with functional outcome; quality of life significantly improved

Dr. Fang's clinical reflection: Brachial plexus reconstruction is a long game — nerve regeneration is measured in months and years, not weeks, and the patient and family must understand from the outset that the recovery timeline is fundamentally determined by the biology of nerve regeneration, not by the surgery alone. What the surgery can do is create the optimal conditions for regeneration — precise coaptation of the nerve ends, tension-free repair, and the selection of the best available donor sources for nerve transfer. What the rehabilitation does is maintain the target muscles and joints in the best possible condition to receive the regenerating axons when they arrive. In this patient, the combination of neurolysis, nerve grafting, and nerve transfer — tailored to the specific injury pattern — produced a meaningful functional recovery that has restored his independence in daily activities. That is the goal of brachial plexus reconstruction: not anatomical perfection, but functional independence.

Expert Commentary — Dr. Fang Yousheng

1. Brachial Plexus Injury: Classification, Injury Mapping, and the Surgical Decision Framework

Brachial plexus injury is among the most complex and surgically demanding conditions in peripheral nerve surgery. The brachial plexus — formed by the ventral rami of C5, C6, C7, C8, and T1 nerve roots — supplies the entire motor and sensory innervation of the upper limb, and injury to it produces a spectrum of functional deficits ranging from partial weakness to complete flail limb. The surgical management of brachial plexus injury begins with precise injury classification: preganglionic injuries (nerve root avulsions from the spinal cord) cannot be repaired by direct suture and require nerve transfer from extraplexal sources; postganglionic injuries (ruptures distal to the dorsal root ganglion) can be repaired by direct suture or nerve grafting if the gap is bridgeable. The distinction between avulsion and rupture is the most critical diagnostic determination in brachial plexus surgery, and it requires the integration of clinical examination findings, MRI and CT myelography, and intraoperative neurophysiological assessment. Once the injury pattern is mapped, the surgical strategy is built around a hierarchy of functional priorities: elbow flexion is the highest priority target because it is the most functionally important movement of the upper limb and the most reliably achieved by nerve reconstruction; shoulder abduction is the second priority; wrist extension and hand function are progressively more distal targets that require longer regeneration distances and are therefore more challenging to achieve. The selection of donor nerve sources for transfer — intercostal nerves, the phrenic nerve, the spinal accessory nerve, the contralateral C7 root, or intraplexal donors where available — is determined by the injury pattern, the available donor sources, and the surgeon's experience with each transfer technique.

2. Microsurgical Nerve Repair and Grafting: Technical Principles and the Biology of Nerve Regeneration

The technical success of brachial plexus reconstruction depends on the quality of the microsurgical nerve coaptation — the precision with which the proximal and distal nerve stumps are aligned and joined, the tension across the repair, and the fascicular matching between the donor and recipient nerve. Tension-free repair is a fundamental principle: a repair under tension will fail because the mechanical stress disrupts the regenerating axons as they attempt to cross the coaptation site. Where the gap between nerve stumps is too large for tension-free direct repair — as is frequently the case in brachial plexus injuries where the nerve has been avulsed or ruptured with significant retraction — interpositional nerve grafting is required. The sural nerve, harvested from the posterior leg, is the most commonly used donor nerve for grafting because of its length, calibre, and expendability. The graft bridges the gap between the proximal and distal stumps, providing a scaffold along which the regenerating axons can grow from the proximal stump to the distal target. The rate of axonal regeneration is approximately 1 mm per day — a biological constant that determines the minimum time from surgery to functional recovery and underscores the importance of early surgical intervention in brachial plexus injury: every month of delay reduces the window available for reinnervation of the target muscles before irreversible motor endplate degeneration occurs. In clinical practice, the optimal window for brachial plexus reconstruction is within three to six months of injury — early enough to maximise the potential for reinnervation, but late enough to allow the initial inflammatory response to resolve and the injury pattern to declare itself fully.

3. Rehabilitation After Brachial Plexus Reconstruction: The Multidisciplinary Framework for Functional Recovery

Surgical reconstruction of the brachial plexus creates the biological conditions for nerve regeneration — but the functional outcome is ultimately determined by the quality of the postoperative rehabilitation programme. The rehabilitation of brachial plexus injury is a long-term, multidisciplinary process that must be initiated in the early postoperative period and sustained throughout the years of nerve regeneration and functional recovery. Physiotherapy in the early postoperative period focuses on maintaining joint range of motion, preventing contracture, managing oedema, and maintaining the condition of the denervated muscles through electrical stimulation and passive exercise — preserving the target muscles in the best possible condition to receive the regenerating axons. As reinnervation progresses — signalled by the return of voluntary motor activity in the target muscles, typically months to years after surgery depending on the distance from the repair site — physiotherapy transitions to active strengthening and motor re-education. Occupational therapy runs in parallel throughout the recovery process, focusing on activities of daily living retraining, adaptive equipment provision, and the progressive restoration of functional independence. The patient's engagement with the rehabilitation programme is as important as the surgical technique in determining the final functional outcome — a technically excellent nerve repair will not achieve its potential if the target muscles are allowed to atrophy and contract during the years of regeneration. In this patient, Mr. Li's full compliance with the structured rehabilitation programme was a critical factor in the functional recovery he achieved.

How CMCS Shanghai Coordinated This Case

CMCS Shanghai supported Mr. Li and his family throughout the emergency transfer, surgical, and rehabilitation pathway at Huashan Hospital, Fudan University, including: urgent appointment coordination with Dr. Fang Yousheng's peripheral nerve surgery clinic following the road traffic accident, with bilingual review of all emergency and imaging records; bilingual interpretation throughout the clinical neurological examination, injury mapping discussion, surgical planning consultation, and all postoperative review appointments; coordination of MRI brachial plexus, CT myelography, and EMG/nerve conduction studies with bilingual results communication and clinical summary; bilingual surgical consent process — ensuring the patient and family had a complete understanding of the reconstructive procedure, the expected timeline of nerve regeneration and functional recovery, the rehabilitation requirements, and the realistic goals of brachial plexus reconstruction; postoperative rehabilitation coordination — bilingual liaison with the physiotherapy and occupational therapy teams, written rehabilitation schedule provided in the patient's preferred language, and structured long-term follow-up appointment coordination; and ongoing monitoring of neurophysiological and functional recovery with bilingual communication of progress to the patient and family throughout the multi-year recovery process.

For international patients who have sustained traumatic brachial plexus injuries or other complex peripheral nerve injuries and are seeking specialist surgical evaluation and reconstruction in Shanghai, Dr. Fang Yousheng's team at Huashan Hospital offers a clinically rigorous, microsurgically advanced approach — combining precise injury mapping, expert nerve grafting and transfer technique, and structured multidisciplinary rehabilitation to achieve the best possible functional outcome within the biological constraints of peripheral nerve regeneration. CMCS ensures that expertise is accessible: in the patient's language, with every step of the surgical and rehabilitation pathway coordinated and communicated clearly, from emergency transfer through long-term functional recovery.

This case report is de-identified and published for educational purposes. All clinical details have been anonymized in accordance with patient privacy standards. CMCS Shanghai is a medical concierge service and does not provide direct medical care.