Open Carpal Tunnel Surgery for 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.
If you have open carpal tunnel release surgery, you typically 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 1 to 2 weeks after surgery. 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.
The timing of your return to work depends on the type of surgery you had, whether the surgery was on your dominant hand (the hand you use most), and your work activities.
If you had open surgery on your dominant hand and you do repeated actions at work, you may be able to return to work in 6 to 8 weeks. Repeated motions include typing or assembly-line work. If the surgery was on the other hand and you do not do repeated actions at work, you may be able to return to work in 7 to 14 days.
If you had endoscopic surgery, you may be able to return to work sooner than with open surgery.
Why It Is Done
Open carpal tunnel surgery is considered when:
- Symptoms are still present after a long period of non-surgical treatment. In general, surgery is not considered until after several weeks to 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.footnote 1
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.
Both endoscopic and open carpal tunnel release have benefits and risks. Studies do not show that one procedure is better than the other.footnote 2
The risk and complication rates of open surgery are very low. Major problems such as nerve damage happen in fewer than 1 out of 100 surgeries (less than 1%).footnote 2 There is a small risk that the median nerve or other tissues may be damaged during surgery. After open surgery, recovery may be slower than after endoscopic surgery. And there may be some pain in the wrist and hand. You may also have some tenderness around the scar. There are also the risks of any type of surgery, including possible infection and risks of general anesthesia. But most open carpal tunnel surgery is done with local anesthesia or regional block rather than with general anesthesia.
What To Think About
Open carpal tunnel surgery cuts open the base of the palm and may require a longer recovery period than endoscopic surgery. Temporary nerve problems may be less likely with open surgery. But painful scar tissue may be more likely to develop after open surgery than after endoscopic surgery.footnote 1
Current as of: March 21, 2017
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