Clinical outcomes and manometry results of peroral endoscopic myotomy in patients with achalasia: experience in a Latin American referral centre

Introduction: Currently there is little information in Latin America on the clinical outcome and manometric evolution of patients with Achalasia undergoing peroral endoscopic myotomy (POEM). Primary outcome: Evaluate the manometric and clinical changes in adult patients with achalasia after peroral endoscopic myotomy at a referral center in Bogotá, Colombia. Methods: Observational, analytical, longitudinal study. Adult patients with achalasia according to the Chicago 4.0 criteria were included. Sociodemographic, clinical and manometric variables were described. To compare the pre- and post-surgical variables, the Student's or Wilcoxon's t test was used for the quantitative variables according to their normality, and McNemar's chi-square for the qualitative variables. Results: 29 patients were included, 55.17% (n = 16) women, with a mean age at the time of surgery of 48.2 years (±11.33). The mean post-procedure evaluation time was 1.88 ± 0.81 years. After the procedure, there was a significant decrease in the proportion of patients with weight loss (37.93% vs 21.43% p 0.0063), chest pain (48.28% vs 21.43, p 0.0225) and the median Eckardt score (8 (IQR 8 -9) vs 2(IQR 1-2), p < 0.0001). In addition, in fourteen patients with post-surgical manometry, significant differences were found between IRP values (23.05 ± 14.83 mmHg vs 7.69 ± 6.06 mmHg, p 0.026) and in the mean lower esophageal sphincter tone (9.63 ± 7.2 mmHg vs 28.8 ± 18.60 mmHg, p 0.0238). Conclusion: Peroral endoscopic myotomy has a positive impact on the improvement of symptoms and of some manometric variables (IRP and LES tone) in patients with achalasia.