Carpal Tunnel Release Surgery

What it is

The median nerve reaches the hand through a narrow passage at the base of the palm, bounded by wrist bones on three sides and by a thick ligament across the top. When the contents of that passage swell, the nerve is the soft thing that gets squeezed, and the result is the numbness, tingling and night-time pain of carpal tunnel syndrome. Nothing widens the bones, so the operation works on the roof: the surgeon opens a short incision in the palm and divides the ligament, which lets the tunnel spring open and relieves the pressure. The cut ligament is left to heal in its new, longer position. An endoscopic version of the same release, done through a smaller opening with a camera, is billed under a different code.

Why it is done

• To relieve numbness, tingling, and pain in the thumb, index, and middle fingers caused by pressure on the median nerve
• When splinting, activity changes, anti-inflammatory medicine, or steroid injections have not settled the symptoms
• When nerve conduction testing shows the nerve is being significantly affected
• To stop further loss of grip strength and muscle bulk at the base of the thumb

What to expect

The operation is short and is generally done with the arm numbed rather than with full general anesthesia, though that varies by surgeon and patient. A splint or bulky dressing stays on for about a week, and gentle motion exercises start after that. Night symptoms often ease quickly. Strength in the palm takes longer, and tenderness over the scar can persist for some weeks. How completely things recover depends in part on how long the nerve was compressed before surgery — a nerve that has been squeezed for years may not return entirely to normal.

Questions worth asking

• Is the open release planned, or the endoscopic one? They are separate codes at different prices, and the facility charges differ too.
• Will this be done in a hospital operating room, an ambulatory surgery center, or a procedure room in the office?
• Is an anesthesiologist involved, or is the surgeon placing the local or regional block? That decides whether there is a separate anesthesia bill.
• If both hands need releasing, is there a discount for doing the second side at the same sitting, and would my plan cover them together?
• Are the post-operative visits, splint, and hand therapy included in the surgical fee or billed on top?