Abstract:Objective To compare the clinical effect of longitudinal opening method and inverted T opening method in treatment of patients with achalasia (AC) by peroral endoscopic myotomy (POEM).Methods Clinical data of 55 patients with AC who underwent POEM treatment from January 2016 to December 2019 were retrospectively analyzed, including the patient's general condition, Eckardt score, and intraoperative and postoperative short-term complications, etc.Results 55 patients successfully completed POEM, with an average follow-up of (10.67 ± 2.80) d. The postoperative clinical symptom scoring system for achalasia of cardia (Eckardt score) was significantly improved compared with preoperation [2 (2, 2) vs 4 (4, 5), P < 0.05)], the symptom relief rate was 98.2% (54/55). The total complication rate of the longitudinal opening method group was markedly higher than that of the inverted T opening method group [44.8% (13/29) vs 15.4% (4/26), P < 0.05], the incidence of gas-related complications was more obvious [34.5% (10/29) vs 7.7% (2/26), P < 0.05]. There was one case of mucosal laceration and perforation during operation, and one case had recurrence in the longitudinal opening group.Conclusion The inverted T opening method POEM can not only effectively relieve the clinical symptoms of patients, but also reduce the incidence of short-term complications during and after operative treatment.