Open carpal tunnel surgery for carpal tunnel syndrome

Surgery Overview

During open carpal tunnel release surgery, the transverse carpal ligament is cut, which releases pressure on the median nerve and relieves the symptoms of carpal tunnel syndrome.

An incision is made at the base of the palm of the hand. This allows the doctor to see the transverse carpal ligament. After the ligament is cut, the skin is closed with stitches. The gap where the ligament was cut is left alone and eventually fills up with scar tissue.

See an illustration of open carpal tunnel release surgery.

If you have open carpal tunnel release surgery, you usually do not need to stay in the hospital. It is usually done under local anesthetic and you can go home on the same day.

What To Expect After Surgery

After surgery, the hand is wrapped. The stitches are removed 10 to 14 days after surgery. You may be directed to wear a splint for several weeks. The pain and numbness may go away right after surgery or may take several months to subside. Try to avoid heavy use of your hand for up to 3 months.

When you return to work depends on whether the dominant hand (the hand you use most) was involved, on your work activities, and on the effort that you put into rehabilitative physiotherapy.

• If you have surgery on your nondominant hand and do not do repetitive, high-risk activities at work, you may return to work within 1 to 2 days, although 7 to 14 days is most common.
• If you have surgery on your dominant hand and do repetitive activities at work, you may require 6 to 12 weeks for a full recovery before you can return to previous work duties. Physiotherapy may speed your recovery.

Why It Is Done

Open carpal tunnel surgery is considered when:

• Symptoms are still present after a long period of non-surgical treatment. Generally, surgery is not considered until after 3 to 12 months of non-surgical treatment. But this assumes that you are having ongoing symptoms but no sign of nerve damage. Nerve damage would make surgery more urgent.
• Severe symptoms (such as persistent loss of feeling or coordination in the fingers or hand, or no strength in the thumb) restrict normal daily activities.
• There is damage to the median nerve (shown by nerve test results and loss of hand or finger function), or a risk of nerve damage.
• Tumours or other growths need to be removed.

How Well It Works

Most people who have surgery for carpal tunnel syndrome have fewer or no symptoms of pain and numbness in their hand after surgery. The overall success rate for either endoscopic or open surgery is more than 95%.¹ However, after open surgery, recovery may be slower, and there may be some pain in the wrist and hand. You may also have some tenderness around the scar.

In rare cases, the symptoms of pain and numbness may return (the most common complication), or there may be temporary loss of strength when pinching or gripping an object, due to the cutting of the transverse carpal ligament.

If the thumb muscles have been severely weakened or wasted away, hand strength and function may be limited even after surgery.

Risks

The risk and complication rates of open surgery are very low (about 5%).¹ There is a small risk that the median nerve or other tissues may be damaged during surgery. There are also the risks of any type of surgery, including possible infection and risks of general anesthesia. However, most open carpal tunnel surgery is done with local anesthesia or regional block, rather than general anesthesia.

What To Think About

Open carpal tunnel surgery cuts open the base of the palm and requires a longer recovery period when compared to endoscopic surgery. Painful scar tissue is more likely to develop after open surgery than after endoscopic surgery.²

Should I have surgery for carpal tunnel syndrome?

Complete the surgery information form (PDF)(What is a PDF document?) to help you prepare for this surgery.

Author:	Douglas Dana Monica Rhodes	Last Updated: January 11, 2007
Medical Review:	William M. Green, MD - Emergency Medicine Adam Husney, MD - Family Medicine David Pichora, MD, FRCSC - Orthopedic Surgery
© 1995-2008 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.