Surgeons have known for a long time that a procedure called sympathectomy can treat excessive sweating in the hands and underarms.
Sympathectomy involves cauterizing (cutting and sealing) a portion of the sympathetic nerve chain that runs down the back inside the chest, parallel to the spine. This operation permanently interrupts the nerve signal that is causing the body to sweat excessively.
In the past, this was a complicated procedure because surgeons needed to make a major incision to reach the sympathetic chain. They either had to open the chest cavity or approach through the back, just below the neck. In either case, the risks related to major surgery generally were thought to outweigh any potential benefits.
However, recent advances in visually-assisted endoscopic surgery have made it possible for surgeons to perform the procedure with only very small incisions; in fact, the incisions are less than one inch each. Using a fiberoptic camera and small surgical instruments, the surgeon can locate and cut the right portion of the sympathetic chain in a relatively simple operation. Therefore, this is considered an outpatient surgery, meaning most patients do not require an overnight stay in the hospital.
Patients are placed under general anesthesia with their arms propped up at a 90-degree angle to the body. This provides access to the area just below the underarm, through which the operation is performed.
Starting on one side of the body, the anesthesiologist deflates the lung so that the surgeon will be able to get to the sympathetic nerve chain. He or she makes one or two small incisions underneath the armpit, usually between the second and third ribs.
A small camera device, or videoscope, is placed through the incision in order to see inside the chest and identify the sympathetic nerve chain. Through the scope, a cautery device to cut and seal the appropriate level, as determined in advance by the person's symptoms, is placed. The incision is closed with sutures that will eventually dissolve on their own. The patient is usually released the same day, and usually can return to work or school within a few days.
Benefits and Risks
Patients with severe hyperhidrosis who have exhausted other medical treatments are finding that the surgery offers a permanent solution to their problem. In almost all cases, it cures excessive sweating in the hands and underarms, and many people experience the side benefit of decreased sweating in the feet. Moreover, the effect of the surgery is often immediate. Patients are often amazed when they wake up and find their hands warm and dry for the first time in years.
The risks associated with the procedure are minimal, but still need to be taken into account. Many people have reported experiencing side effects, either as a result of the procedure itself or from complications that may occur during the surgery.
These risks may include:
Even rarer complications are excessive bleeding and/or injury to the surrounding organs and tissues.
For most people, the benefits of the procedure far outweigh the risks. However, there are certain cases in which the surgery should not be performed. People who have severe heart and/or respiratory disease, a currently active infection, or extremely low heart rate may not be able to undergo thoracoscopic sympathectomy. Also, people who have had prior chest surgery generally are not good candidates.