Endoscopic Botulinum Toxin Injection
摘要
Achalasia is a rare esophageal motility disorder that causes difficulty swallowing due to failure of peristalsis and inability to relax the lower esophageal sphincter. Botulinum toxin injection is a treatment option for achalasia that relaxes the lower esophageal sphincter, allowing improved emptying of the esophagus. This chapter describes each endoscopic botulinum toxin injection step with representative images.