Replantation (Finger/Hand)

Replantation of a finger or hand is a microsurgery procedure that reattaches a completely or partially severed (cut off) finger or hand back to the body after a traumatic amputation (accidental loss of the limb).

During the surgery, a specialist called a microsurgeon uses a powerful operating microscope to reconnect the tiny structures inside the finger or hand — the bones, tendons (the tough cords that move your fingers), arteries (vessels that bring blood to the limb), veins (vessels that carry blood away), and nerves (the wiring that gives feeling and movement). Restoring blood flow is the most critical step, because the severed part begins to die within hours without a fresh blood supply.

Replantation is considered when a finger or hand has been traumatically amputated and the severed part is still available and in a condition suitable for reattachment. The decision depends on many factors, including how long ago the injury happened, the patient's overall health, and the nature of the wound.

• Complete amputation (total cut-off) of one or more fingers, especially the thumb — which is vital for gripping.
• Complete amputation of the hand at or near the wrist.
• Partial amputation where the finger or hand is still connected by a small bridge of skin or tissue but blood flow has stopped.
• Amputations in children, where the potential for nerve regeneration (nerve regrowth and recovery) is high.
• Clean, sharp cuts (such as from a machine blade or knife) where the tissue edges are undamaged.
• Injuries where the severed part has been properly preserved (kept cool) and reaches the surgical team within the recommended time window.

Replantation is generally NOT attempted in certain situations, because the risks of a long, complex operation would outweigh the likely benefit.

• Severely crushed or mangled parts where the tissue is too damaged to reconnect.
• Amputations at multiple levels along the same digit or limb (multiple-level injuries).
• The severed part has been warm and without blood supply for too long (generally more than several hours without cooling).
• Patients with serious underlying health conditions (such as severe diabetes or significant heart disease) that make lengthy anaesthesia (medication that puts you into a deep sleep for surgery) unsafe.
• Single-finger amputations in adults at certain zones of the finger where function after reattachment is likely to be poor.
• Contaminated wounds with heavy infection or soil contamination.

Replantation is one of the most technically demanding operations in surgery, and like all complex procedures it carries recognised risks — the most serious being that the reattached part may not survive.

• Failure of the reattachment — the replanted finger or hand may lose blood supply after surgery and not survive, sometimes requiring amputation of the part.
• Arterial thrombosis (a blood clot forming in the reconnected artery) or venous congestion (blood pooling in the veins), both of which can cut off circulation and may require urgent return to the operating room.
• Infection at the wound site, which can threaten the survival of the replanted tissue.
• Incomplete recovery of sensation (feeling) — the finger or hand may remain numb or have abnormal sensation even after nerve healing.
• Incomplete recovery of movement — stiffness and reduced range of motion are common, and many patients need months of hand therapy (physiotherapy focused on the hand) afterwards.
• Cold intolerance — the replanted part often remains unusually sensitive to cold temperatures for a long time.
• Bone non-union (the bone ends fail to fuse together properly) or malunion (bones heal in a misaligned position).
• Tendon adhesions (scar tissue that causes the tendons to stick together), limiting movement.
• Scarring and cosmetic changes to the appearance of the hand or finger.
• Risks related to general or regional anaesthesia, including allergic reactions and breathing difficulties.

Because replantation almost always follows an emergency injury, there is rarely time for the patient to prepare in advance. The surgical team works quickly against the clock. However, there are important steps that happen between the moment of injury and the start of surgery, and patients or bystanders can help.

Care of the severed part before reaching hospital: The amputated part should be wrapped in a clean, damp cloth or gauze, placed inside a sealed plastic bag, and then placed on ice (not directly touching the ice, to avoid freezing). The part should be kept cool but never frozen. This slows tissue breakdown and extends the window for successful replantation. The patient should come to hospital as quickly as possible.

At the hospital, the care team will typically carry out several assessments before surgery begins:

• Blood tests to assess overall health and blood clotting ability.
• X-rays of the injured hand and the severed part to assess bone damage.
• Assessment of tetanus (a serious infection from dirty wounds) vaccination status.
• Review of any regular medications — blood thinners, for example, may need to be noted.
• A brief health history to check for conditions that affect anaesthesia safety.
• Assessment of how long the part has been without blood flow and how it has been stored.

Because this is emergency surgery, fasting (not eating or drinking) instructions will be given by the anaesthetist based on the urgency of the case. In some situations surgery proceeds without a full fasting period, with adjustments made to manage that risk.

The typical sequence of steps in the operating room:

• 1. The patient is given anaesthesia — usually general anaesthesia (fully asleep) or a regional nerve block (numbing the entire arm) depending on the case.
• 2. Both the wound on the hand and the severed part are cleaned and prepared under sterile conditions.
• 3. Bone ends are trimmed and fixed together using small pins, screws, or wires (internal fixation) to create a stable base.
• 4. Tendons are repaired — first the flexor tendons (which bend the fingers) and then the extensor tendons (which straighten them).
• 5. Arteries are reconnected under the operating microscope using sutures (stitches) thinner than a human hair, to restore blood flow into the replanted part.
• 6. Veins are reconnected to allow blood to drain away from the replanted part.
• 7. Nerves are repaired — this is a delicate step; nerve regeneration continues for months after surgery.
• 8. Skin is closed, and a protective splint (a rigid support to keep the hand still) is applied.
• 9. The team monitors whether blood is flowing through the replanted part before the patient leaves the operating room.

Recovery after replantation is a long process measured in months, not days. The immediate goal is keeping the replanted part alive; the longer-term goal is recovering useful function. Most patients are admitted to hospital for close monitoring in the days following surgery, because the critical period for blood flow problems is within the first few days.

• Hospital monitoring: Nurses check the colour, temperature, and capillary refill (how quickly colour returns when pressed) of the replanted part very frequently — often every hour — in the first days. Any sign of blocked blood flow may require urgent return to the operating room.
• Warmth and positioning: The hand is usually kept elevated (raised above heart level) to reduce swelling, and the room is kept warm to prevent the small blood vessels from narrowing due to cold.
• Medications: Doctors typically prescribe blood thinners to reduce the risk of clots in the repaired vessels, antibiotics to prevent infection, and pain relief. Smoking is strongly discouraged because nicotine causes blood vessels to narrow and significantly increases the risk of failure.
• Splinting: The hand is kept in a protective splint for several weeks to allow bones and tendons to heal without stress.
• Hand therapy: Once the surgeon allows it — usually after several weeks — a hand therapist (a physiotherapist or occupational therapist specialising in hand function) guides a programme of exercises to reduce stiffness, prevent tendon adhesions (scar tissue build-up), and improve movement and sensation.
• Nerve recovery: Sensation and fine motor control (detailed finger movement) return slowly as nerves regenerate. This can take many months or even longer, and the degree of recovery varies greatly between individuals.
• Follow-up appointments: Regular visits to the surgeon and hand therapist are essential over many months to monitor healing, adjust therapy, and decide if further surgery (such as tenolysis — releasing stuck tendons — or nerve grafting) is needed.
• Return to work and daily activities: The timeline depends on the type of work and the extent of the injury. Light activities may resume relatively earlier; heavy manual work typically takes much longer.
• Cold sensitivity: Patients are advised to protect the replanted part from cold for an extended period, as cold intolerance is a common long-term issue.
• Psychological support: Adapting to a serious hand injury can be emotionally challenging. Many centres recommend psychological or counselling support as part of the recovery process.