The assessment: skin, tendon, or joint?
The whole plan turns on this question, and it cannot be answered from a photograph.
Why it matters. A finger that will not bend may be held by tight skin, by a tendon that is stuck or ruptured, or by a joint that has stiffened or fused. Each needs a completely different operation, and treating the wrong one achieves nothing. Skin contracture is released and resurfaced. A tendon problem needs tenolysis, grafting or a staged reconstruction. A stiff joint needs release, and a destroyed joint needs fusion or replacement.
The test that separates them. Passive versus active movement. If a finger can be bent by the examiner but not by the patient, the joint moves and the problem is in the tendon, nerve or muscle. If it cannot be bent even passively, the restriction is in the skin, the joint, or scarred tissue around them. This distinction is the single most useful thing in the examination.
Measurements that should be recorded. Range of movement at every joint, in degrees, active and passive. Total active motion. Grip strength and pinch strength, measured with a dynamometer. Sensation, tested properly — two-point discrimination rather than "can you feel this". Thumb opposition. And a functional score such as the DASH or similar, because it captures what the patient can actually do.
Sensation in detail. A hand without sensation is a poor hand however well it moves, and where a nerve has been divided that needs establishing early, because nerve options close with time.
The thumb. It accounts for a large share of hand function, and its position, stability, length and opposition are assessed separately from the fingers.
Imaging. X-rays for bone and joint, ultrasound or MRI for tendon continuity and gliding, and nerve conduction studies where nerve function is in doubt.
Skin and previous scars. Where previous surgery has been, which flaps have been used and which donor sites remain.
Pain. Neuropathic pain, cold intolerance and hypersensitivity are extremely common after hand trauma and need treating in their own right.
The patient's work and hand use. A pianist, a bricklayer and a retired person need different plans, and the objective should be written in terms of tasks rather than degrees alone.
Smoking. Materially worsens flap survival, bone healing and nerve recovery, and should be addressed before elective reconstruction.
What a good assessment produces. A problem list naming skin, tendon, nerve and joint separately, an expected gain stated in movement, strength and sensation, the therapy requirement, and an honest statement of what will not come back.
Ask: is my problem in the skin, the tendon, or the joint, and how do you know?


