Peroral Endoscopic Myotomy (POEM) for Esophageal Motility

An esophageal motility disorder is when muscular contractions become discoordinated or weak and interfere with movement of food down the esophagus. Some esophageal motility disorders persist long enough to cause severe problems requiring surgical intervention. Achalasia, one subtype of esophageal motility disorder that is a rare disease, can be defined by the esophageal sphincter and muscle unable to relax or dilate. Left untreated, symptoms such as difficulty swallowing, regurgitation, heartburn, and chest pain may easily turn into complications such as severe weight loss, malnutrition, coughing, pulmonary infection, pneumonia, and perforation of the esophagus. Diagnosis of esophageal achalasia can be determined by esophageal manometry and/or barium swallow esophagram. Treatment for achalasia includes balloon dilation, botulinum toxin injection and surgical intervention. Balloon dilation is performed by inserting a balloon through the esophageal sphincter, inflating the balloon, disrupting the esophageal muscle. Botox has also been known to successfully relax spastic muscle contractions of achalasia through direct injection into the esophageal muscle. Unfortunately, each alternative to surgical treatment often requires repeated administration to improve the symptoms of achalasia. Traditional treatment of achalasia has included open abdominal or thoracic surgical procedures to cut valve muscles between the esophagus and stomach (Heller Myotomy). Laparoscopic multi-port Heller myotomies have become the preferred approach, requiring 4 smaller abdominal incisions for placement of laparoscope equipment. Results of this laparoscopic technique have proven that although 2/3 of the patient population was successfully treated, a subset of this group still need repeat surgical procedures or balloon dilation. Recently, single-incision laparoscopic Heller myotomies have produced favorable results, with a single umbilical incision preferential to multiple-incision laparoscopy. We propose adoption of a new, incisionless approach to performing a Heller myotomy for the surgical treatment of achalasia. The method, the Peroral Endoscopic Myotomy (POEM) is expected to provide a less-invasive treatment for esophageal achalasia, ideally providing similar if not better outcomes as the Heller myotomy and can be adopted safely and effectively at Penn Medicine.