Clinical Outcomes and Safety of Partial Full-Thickness Myotomy versus Circular Muscle Myotomy in Peroral Endoscopic Myotomy for Achalasia Patients

Background. Here we aimed to evaluate and compare the efficacy and safety between partial full-thickness myotomy and circular muscle myotomy during POEM procedure in achalasia patients. Methods. Clinical data of achalasia of cardia (AC) patients who underwent POEM in our center during January 2014 to January 2015 was collected (34 cases). 19 patients who received partial full-thickness myotomy were assigned to group A and 14 patients who received circular muscle myotomy were assigned to group B. The procedure-related parameters between the two groups were compared. Symptom relief rate and postprocedure manometry outcomes were compared to evaluate the efficacy. Procedure-related adverse events and complications were compared to evaluate the safety. Results. (1) Mean operation times were significantly shorter in group A than group B (62.42 +/- 23.17 vs 87.86 +/- 26.44 min, p < 0.01). (2) Symptom relief rate and postprocedure manometry outcomes had no statistical differences when compared between the two groups (all p > 0.05). (3) Comparison of procedure-related adverse events and complications had no statistical differences (al p > 0.05). Conclusion. Partial full-thickness myotomy had no significant differences in efficacy or safety with circular myotomy, but partial full-thickness myotomy significantly reduced the procedure time.