679 TREATMENT OF ANASTOMOTIC LEAKAGE AFTER ESOPHAGECTOMY (TENTACLE—ESOPHAGUS) STUDY: EFFICACY OF DIFFERENT INITIAL TREATMENT STRATEGIES FOR ANASTOMOTIC LEAKAGE
Abstract Anastomotic leakage (AL) is a common and severe complication after esophagectomy. It is largely unknown which primary treatments are most effective for which type of leak. We aimed to investigate the effectiveness of different primary treatments of AL. Methods International retrospective cohort study, in which patients with AL after esophagectomy with gastric tube reconstruction were included in the period 2011-2019. Detailed data regarding case mix, resection, leakage characteristics (e.g. organ failure, leak circumference, contamination, drains present) and leakage treatment (e.g. hours from diagnosis to treatment, primary and secondary treatment modalities) were collected. Primary outcome was 90-day mortality and secondary outcomes included length of stay and leak healing time. Different clinically relevant leakage groups have been defined. Efficacy of different treatment strategies adjusted for leakage severity will be analyzed in these clinical groups. The study protocol is accessible at www.tentaclestudy.com. Results Detailed data of 1451 patients with AL was collected from 71 centers in 20 countries. Data accuracy was 96.5%. Preliminary results showed that the overall 90-day mortality was 11.6%. The analysis of TENTACLE—Esophagus data is currently being performed and efficacy of different leakage treatment strategies is being assessed. The efficacy of initial leakage treatment strategies will be ready to be presented at the ISDE meeting. Conclusion This is the largest study on effectiveness of AL treatments. The final results of initial leak treatments, which will be available for presentation at the ISDE meeting, could provide an evidence-based basis that can be used by clinicians to determine the preferred primary treatment strategy in patients with a given type of anastomotic leakage.