Carpal tunnel release


Carpal tunnel release is surgery to treat carpal tunnel syndrome. Carpal tunnel syndrome is pain and weakness in the hand that is caused by pressure on the median nerve in the wrist.

Alternative Names

Median nerve decompression; Carpal tunnel decompression; Surgery - carpal tunnel


The median nerve and the tendons that flex (or curl) your fingers go through a passage called the carpal tunnel in your wrist. This tunnel is narrow, so any swelling can pinch the nerve and cause pain. A thick ligament (tissue) just under your skin (the carpal ligament) makes up the top of this tunnel. During the operation, the surgeon cuts through the carpal ligament to make more space for the nerve and tendons.

The surgery is done in the following way:

Sometimes this procedure is done using a tiny camera attached to a monitor. The surgeon inserts the camera into your wrist through a very small surgical cut and views the monitor to see inside your wrist. This is called endoscopic surgery. The instrument used is called an endoscope.

Why the Procedure Is Performed

People with symptoms of carpal tunnel syndrome usually try nonsurgical treatments first. These may include:

If none of these treatments help, some surgeons will test the electrical activity of the median nerve with an EMG (electromyogram). If the test shows that the problem is carpal tunnel syndrome, carpal tunnel release surgery may be recommended.

If the muscles in your hand and wrist are getting smaller because the nerve is being pinched, surgery will usually be done soon.


Risks of this surgery are:

Before the Procedure

Tell your health care provider what medicines you are taking. This includes medicines, supplements, or herbs you bought without a prescription.

After the Procedure

This surgery is done on an outpatient basis. You will not need to stay in the hospital.

After the surgery, your wrist will probably be in a splint or heavy bandage for about a week. Keep this on until your first doctor visit after surgery, and keep it clean and dry. After the splint or bandage is removed, you will begin motion exercises or a physical therapy program.

Outlook (Prognosis)

Carpal tunnel release decreases pain, nerve tingling, and numbness, and restores muscle strength. Most people are helped by this surgery.

The length of your recovery will depend on how long you had symptoms before surgery and how badly damaged your median nerve is. If you had symptoms for a long time, you may not be completely free of symptoms after you recover.


Calandruccio JH. Carpal tunnel syndrome, ulnar tunnel syndrome, and stenosing tenosynovitis. In: Canale ST, Beaty JH, eds. Campbell's Operative Orthopaedics. 12th ed. Philadelphia, PA: Elsevier Mosby; 2013:chap 76.

Mintalucci DJ, Leinberry Jr. CF. Open versus endoscopic carpal tunnel release. Orthop Clin N Am. 2012;43:431-7. PMID: 23026458

Zhao M, Burke DT. Median neuropathy (carpal tunnel syndrome). In: Frontera WR, Silver JK, Rizzo TD Jr, eds. Essentials of Physical Medicine and Rehabilitation: Musculoskeletal Disorders, Pain, and Rehabilitation. 3rd ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 36.

Review Date: 5/9/2015
Reviewed By: C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery, San Francisco, CA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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