Investigating Postoperative Low Oxygen Levels and Their Impact on Anastomotic Leakage Risk After Radical Esophagectomy

What this Trial Is About

Researchers are investigating whether low oxygen levels after esophagectomy surgery increase the risk of anastomotic leakage, a serious complication where the surgical connection between the esophagus and stomach leaks. This retrospective observational study analyzes patient data from the past five years at a single center, comparing groups with low postoperative arterial oxygen levels PaO2 <80 mmHg to those with normal levels. The goal is to determine if postoperative hypoxia is an independent risk factor and whether correcting it might reduce leakage risk. Participants were divided into two groups based on their lowest recorded arterial oxygen levels during the first postoperative week a Low PaO2 Group with at least one instance below 80 mmHg, and a Normal PaO2 Group with levels at or above 80 mmHg throughout. Anastomotic leakage was diagnosed using imaging methods such as barium swallow, endoscopy, or CT scans, or by typical clinical signs. The study examines the relationship between oxygen levels and leakage incidence to understand if hypoxia is a modifiable risk factor. During the study, data on postoperative oxygen levels and anastomotic leakage occurrence are collected and analyzed. Patients had arterial blood gas analyses and underwent at least one form of imaging or endoscopy for anastomosis evaluation. The primary outcome measured is the rate of esophageal anastomotic leakage within 30 days after surgery. This study is observational and retrospective, so participants are not assigned treatments but rather their clinical records are reviewed to assess outcomes and risk factors.

Postoperative Hypoxemia Increases the Risk of Anastomotic Leak After Radical Esophagectomy