Principles of Tendon Transfer

No fixed deformity
Adequate power of donor muscle (will loose 1 grade)
Adequate excursion & length of donor tendon
Expendable function of donor muscle
Suitable position & direct line of pull
Good soft tissue bed for transfer
Synergistic muscle (not antagonist)
Control of associated joint mobility & stability of proximal joints
Suture under correct / physiological tension
Suitable insertion technique & firm fixation
Avoid construction of pulleys
Reasonable expectations (simple & specific aims)