Achalasia is a rare disease (roughly 1 per 100,000 in the United States). Surgery for achalasia is difficult, and the results can be highly dependent on the experience and skills of the surgeon. It is essential that the muscle of the lower esophageal sphincter be divided completely (cutting the muscle of the sphincter is known as a myotomy), and that the myotomy extends down far enough onto the stomach to relieve the esophageal outflow obstruction. An incomplete myotomy or one that does not extend onto the stomach may cause swallowing problems to persist or recur after surgery.
It is best to perform surgery for achalasia in the earlier stages of disease. In some patients who have suffered from achalasia for many years, the esophagus becomes dilated and may also become ‘sigmoid shaped’ (looks like the letter ‘s’). The results of surgery may not be as good or as durable in patients with very advanced disease.
When the lower esophageal sphincter is cut to treat achalasia, patients are at increased risk for developing gastroesophageal reflux disease. In some patients, a partial fundoplication is added to the myotomy to decrease the chance that this will happen.
In both laparoscopic and robotic myotomy for achalasia, the procedure is performed under general anesthesia and 5-6 small (1-cm or less) incisions are made on the patient’s abdomen. The surgeon watches a video monitor that displays a view from the inside of the abdomen. Both laparoscopic and robotic myotomy take about 2-3 hours to complete, and patients are usually in the hospital for 1-2 days following surgery.