“…In these patients, general and regional anesthesia may be more risky than normal due to the perioperative risks arising from hypotonia and morbid obesity, especially in general anesthesia. 4 If access to food and weight gain are not adequately controlled in PWS, diabetes mellitus, right heart failure, hypoventilation, obstructive sleep apnea (OSAS), and narrow airway, GI dysmotility, esophageal dysmotility, delayed gastric emptying may accompany the clinical picture associated with hyperphagia and obesity. The presence of conditions such as water intoxication may make anesthesia management more difficult.…”