Tendon transfers after nerve injury: a hand therapist's roadmap

When a peripheral nerve in the arm is damaged beyond repair, the muscles it once powered lose their ability to contract. Tendon transfer surgery takes a working muscle-tendon unit and re-routes it so it can take over the missing job, restoring pinch, grip or wrist extension after injuries such as radial, median or ulnar nerve palsy. Without a structured rehabilitation program, even a beautifully executed transfer can end up stiff, weak or poorly integrated into daily life. That is why hand therapy is not an add-on after the operation; it is part of the treatment from the first clinic visit through to the final follow-up.

In Australia, this journey usually begins with a referral from a GP, surgeon or specialist and is delivered by AHPRA-registered physiotherapists or occupational therapists who have completed post-graduate training in upper-limb rehabilitation. Many of these clinicians carry credentials through the Australian Hand Therapy Association, and they work alongside hand surgeons in major outpatient clinics across Sydney, Melbourne, Brisbane, Perth and Adelaide. Understanding how the therapy fits with funding pathways such as the NDIS, WorkCover, iCare or a Medicare Chronic Disease Management plan helps patients plan ahead and avoid surprise out-of-pocket costs.

Why the timing of rehabilitation matters

The tendon transfer itself does not work the moment surgery ends. The transferred tendon needs time at its new attachment before it can tolerate load, and the brain needs time to learn that the muscle now produces a different movement. Hand therapists think of recovery in phases: pre-operative assessment, protection in the first weeks, controlled mobilisation, strengthening, and finally functional retraining. Each phase has goals, splints and exercise principles that build on the last. Skipping a phase or pushing too hard too soon can rupture the repair, stretch the transfer or leave the patient with poor motor control that is hard to undo later.

Surgeons and therapists in Australia typically plan the surgical date first and reverse-engineer the rehab milestones around it. A common example is the pronator teres to extensor carpi radialis brevis transfer for high radial nerve palsy, where wrist extension is sacrificed for finger and thumb control in a combined procedure. Another is the extensor carpi radialis longus to flexor digitorum profundus transfer for ulnar nerve palsy, designed to restore key pinch. The hand therapist's job is to know exactly when each transfer is safe to glide, when it can start taking load, and which motions must still be avoided. This precision is what keeps the surgery working long after the stitches come out.

Pre-operative assessment and patient education

Before anyone goes near an operating theatre, the hand therapist performs a detailed baseline assessment. Joint range of motion, grip and pinch strength, sensibility, oedema and existing patterns of compensation are all recorded. The therapist also screens for stiffness in adjacent joints, because a transfer cannot overcome a stiff shoulder, elbow or wrist. In rural and remote parts of the country, where travel to the treating clinic can mean a full day's drive, baseline photos and videos are often taken so that the local GP or community physio can monitor progress between specialist visits.

Education is just as important as measurement. Patients are taught what a tendon transfer can and cannot do, how long the protection phase will last, and what daily tasks will and will not be possible in the early weeks. Smokers are counselled on nicotine's effect on tendon healing, and people with diabetes or vascular disease are supported to optimise their general health ahead of surgery. For patients whose nerve injury was caused by a workplace incident, the therapist coordinates early with the case manager from WorkCover Queensland, WorkSafe Victoria or iCare NSW so that income support, treatment approvals and return-to-work planning run smoothly. Anyone preparing for their first appointment can download the patient intake paperwork ahead of time and bring completed forms to the initial consultation.

Early post-operative splinting and protection

The first three to five weeks after surgery are about protection. A custom thermoplastic orthosis is fabricated to hold the wrist and fingers in the position that off-loads the tendon repair. The exact design depends on which transfer was performed: a radial nerve palsy repair usually needs a dorsal blocking splint that keeps the wrist extended and the metacarpophalangeal joints in slight flexion, while an ulnar nerve claw-hand correction often uses a low-profile anti-claw splint combined with a protected position for the transfer. Splints are checked at least weekly for pressure areas, particularly over the dorsum of the hand where many Australians develop redness in the dry summer heat.

During the protection phase, the therapist teaches tendon-gliding exercises within the safe range, scar care once the wound is sealed, and oedema control using elevation, retrograde stroking, and in some clinics a compression glove. Patients are also educated on signs of trouble: increasing pain, sudden loss of active motion, or a new "ping" sensation in the forearm that could indicate a ruptured repair. People juggling school drop-offs, arvo sport or shift rosters find that planning small pockets of rest into the day makes a real difference to swelling and stiffness, and the therapist can help structure those breaks in a way that fits around work and family commitments.

Mobilisation and muscle re-education

Once the surgeon clears the transfer for movement, the rehabilitation focus shifts to re-education. The transferred muscle has to learn a new job, and that learning is driven by repetition, feedback and graded task practice. Therapists use blocking exercises to isolate the new action — wrist extension against gravity for a pronator teres transfer, key pinch against a foam block for an ECRL-to-FDP transfer — and combine them with functional drills such as turning a key, lifting a cup of tea, or picking up coins. Mirror therapy and mental practice are increasingly used, particularly when the cortical reorganisation required for the new movement is significant, as can be the case after a complete median nerve injury.

Neuromuscular electrical stimulation and surface electromyography biofeedback are useful tools during this phase, especially when the patient cannot voluntarily contract the transferred muscle on command. In paediatric and adult brachial plexus clinics in Melbourne and Adelaide, EMG-triggered stimulation is routinely paired with goal-setting using the Canadian Occupational Performance Measure, which fits neatly with NDIS plan reviews. Patients who live outside the metropolitan area can borrow portable EMG units for short blocks of home training, with telehealth reviews to coach technique. The aim is always the same: turn an awkward, conscious effort into a smooth, automatic movement that the patient no longer has to think about.

Strengthening, endurance and functional retraining

Strength work begins once the tendon tolerates resistance, usually around the eight-to-ten-week mark for most transfers. Hand therapists prescribe progressive loading using putty, grippers, therapy bands and weighted functional tasks. Pinch dynamometry and the DASH or QuickDASH questionnaire provide objective measures that can be sent to the referrer or funding body. Strengthening is paired with endurance work — repetitive gripping, sustained tool use, sustained keyboard typing — because a transfer needs to perform across a full work shift, not just a single repetition in the clinic.

Functional retraining is where therapy becomes highly individualised. A self-described keen surfer on the Gold Coast needs to relearn how to paddle without overloading the transfer, while a diesel mechanic in the Pilbara has to grip heavy spanners at awkward angles. The therapist simulates these tasks in the clinic with work simulators, tool replicas and on-site visits where feasible. For DVA card holders, return-to-work goals are documented in a way that links to the rehabilitation appliance request, and for TAC clients in Victoria the therapist liaises directly with the planner to align home and driving modifications with the therapy program.

Long-term outcomes, return to work and community life in Australia

Most tendon transfers reach a stable, functional plateau between six and twelve months after surgery, with continued gains possible up to two years when patients keep up a maintenance program. Outcomes are best when the original nerve injury is well defined, the joints above and below are mobile, and the patient engages with therapy consistently. Setbacks such as infection, falls, or returning to heavy manual work too soon can compromise the result, and the hand therapist is often the first clinician to notice the warning signs.

Returning to driving, sport and work is a shared decision between the patient, surgeon, GP and therapist. For WorkCover and iCare clients, the therapist completes functional capacity evaluations, job-demand analyses and graduated return-to-work plans that satisfy insurer requirements. For NDIS participants, therapy reports feed into plan reviews and support applications for assistive technology. Community-based exercise options such as hydrotherapy, supervised gym programs or low-cost hand therapy groups offered through public outpatient services can keep the cost of long-term maintenance down. Patients who want a structured overview of how rehab phases align with funding milestones can review the recovery timeline reference for a snapshot of what to expect week by week.

G'day — if you or someone you care for is facing tendon transfer surgery after a nerve injury, the best next step is a thorough hand therapy assessment. Book an appointment with an experienced Australian hand therapist, bring your referral, medication list and any imaging you have on hand, and ask for a written plan that covers splinting, exercise milestones and return-to-activity goals. The earlier therapy starts, the better the long-term result tends to be.