Carpal Tunnel Release

Carpal tunnel release is a surgical procedure that cuts a tight ligament (a tough band of tissue) in the wrist to relieve pressure on the median nerve (the nerve that controls feeling and movement in most of the hand).

The carpal tunnel is a narrow passage in the wrist formed by small wrist bones on one side and a firm ligament on the other. When this tunnel becomes too tight, the median nerve is squeezed, causing pain, numbness, and weakness in the hand. During the operation, the surgeon divides that ligament to widen the tunnel and take the pressure off the nerve, giving it room to heal.

This procedure is used when carpal tunnel syndrome (a condition caused by a compressed median nerve in the wrist) does not improve with non-surgical treatments, or when nerve damage is progressing. Doctors usually recommend it for patients who have already tried wrist splints, activity changes, or steroid (anti-inflammation) injections without lasting relief.

• Persistent numbness or tingling in the thumb, index, middle, or ring fingers that does not respond to non-surgical care
• Constant pain in the wrist or hand, including pain that wakes the patient at night
• Weakness or clumsiness of the hand, making it hard to grip or pinch objects
• Muscle wasting (shrinkage of the muscle at the base of the thumb) seen on examination
• Nerve conduction studies (electrical tests that measure how well the nerve signals travel) confirming moderate to severe compression
• Carpal tunnel syndrome during pregnancy that has not resolved after delivery

Surgery may not be the right choice for everyone. Doctors generally advise against it, or approach it with extra caution, in certain situations.

• Mild symptoms that have only just started — non-surgical treatment is usually tried first
• No confirmation of carpal tunnel syndrome from nerve tests — the symptoms may have another cause
• Active infection in or near the wrist
• Certain bleeding disorders or patients on blood thinners who cannot safely pause them
• Patients whose hand symptoms are mainly caused by another condition such as a neck (cervical spine) problem — releasing the ligament alone may not help

Carpal tunnel release is generally considered a low-risk procedure, but like all surgery it carries some possible complications.

• Scar tenderness or sensitivity at the incision site in the palm — this is the most common issue and usually fades over months
• Temporary increase in pain, numbness, or tingling during the early healing period
• Pillar pain — aching on either side of the scar in the palm that can persist for several weeks
• Incomplete relief of symptoms, particularly if the nerve was severely compressed for a long time before surgery
• Wound infection — signs include increasing redness, warmth, swelling, or discharge from the incision
• Bleeding or bruising around the wrist
• Injury to the median nerve or its branches during surgery, which could worsen numbness or weakness — this is uncommon
• Injury to nearby tendons (cords that connect muscle to bone)
• Stiffness in the wrist or fingers during recovery
• Recurrence — symptoms returning months or years later if scar tissue re-narrows the tunnel

Preparation for carpal tunnel release starts in the days before surgery. Your care team will give specific instructions, but the following steps are typical.

Before the day of surgery, patients are usually asked to fast (not eat or drink) for a set number of hours — the exact duration depends on whether the procedure will be done under general anaesthesia (fully asleep) or local anaesthesia (only the hand and arm numbed). Patients on blood thinners are usually asked to pause them for a period set by their doctor, to reduce bleeding risk. Smoking and alcohol are best avoided in the days before surgery, as both can slow wound healing. Any regular medications should be discussed with the surgical team in advance, so they can advise which ones to continue and which to pause.

Before the operation, doctors typically arrange the following tests and assessments.

• Nerve conduction study and electromyography or EMG (tests that measure the speed and strength of electrical signals in the nerve and muscle) to confirm the diagnosis and grade the severity
• Blood tests to check general health and clotting ability
• A review of current medications, allergies, and any previous reactions to anaesthesia
• Physical examination of the wrist and hand to document baseline grip strength and sensation

On the day of the operation, the procedure itself generally follows these steps.

• 1. The patient is positioned on an operating table with the affected arm resting on a padded side support.
• 2. The anaesthesia team administers either local anaesthesia to numb the wrist and hand, or regional anaesthesia (a nerve block that numbs the entire arm), or in some cases general anaesthesia — the choice depends on the patient's health and the surgeon's assessment.
• 3. A tourniquet (a cuff that temporarily stops blood flow to the hand) is usually applied to the upper arm to keep the surgical area clear.
• 4. The surgeon makes a small incision (cut) in the palm of the hand, just below the wrist crease. In some hospitals, an endoscopic technique (using a tiny camera through one or two very small cuts) is used instead of an open incision.
• 5. The transverse carpal ligament (the tight band forming the roof of the tunnel) is carefully divided under direct vision or camera guidance.
• 6. The surgeon checks that the median nerve now has adequate space and that there are no other problems in the area.
• 7. The skin is closed with stitches, and a sterile dressing and sometimes a light splint are applied to protect the wrist.

Carpal tunnel release is usually performed as a day procedure, meaning most patients go home the same day. Full recovery of nerve function can take weeks to months, especially if the nerve was compressed for a long time before surgery, so patience during rehabilitation is important.

• After surgery, the hand is kept elevated (raised above heart level) as much as possible for the first day or two to reduce swelling.
• A dressing covers the wound for around one to two weeks; patients are usually advised to keep it clean and dry — your care team will explain how to manage bathing.
• Stitches are typically removed at a follow-up appointment, usually within one to two weeks after surgery, though dissolvable stitches may not need removal.
• Gentle finger movements are usually encouraged from the day after surgery to prevent stiffness — the care team or a hand therapist will demonstrate these exercises.
• Most patients can return to light activities such as typing or driving within a few weeks, but this varies depending on healing progress and the demands of the activity.
• Heavy gripping, lifting, or repetitive wrist use is usually restricted for several weeks — your surgeon will advise when it is safe to return to these activities.
• A hand therapist (a specialist who helps restore hand strength and movement) may be recommended for exercises and scar massage to soften the healing tissue and improve grip strength.
• Numbness and tingling in the fingers often improve gradually over weeks to months as the nerve recovers; weakness in the thumb muscles may take longer to resolve.
• Follow-up appointments allow the surgeon to monitor wound healing, nerve recovery, and overall progress.
• If symptoms such as increasing pain, wound redness, fever, or discharge from the incision develop, patients should seek medical attention promptly.