Outcomes and associated factors of open abdomen after urgent laparotomy at a University Hospital in Southern Brazil: a retrospective study.

Introduction: The technique of open abdomen refers to a surgical procedure that intentionally involves leaving an opening in the abdominal wall. This study aimed to evaluate the clinical outcomes, mortality, and morbidity of patients undergoing open abdomen in a public hospital in Brazil and investigate associated risk factors associated with the outcome.

Methods: Data from electronic medical records were collected from 2017 to 2022. The variables were used for descriptive analyses, association analysis, and survival analysis using the Kaplan-Meier curve.

Results: The sample included 104 patients, with 84 presenting with acute abdomen and 20 with trauma, having highly variable ages and comorbidities. Peritonitis and the need for early reoperation were the most common indication for the procedure, each accounting for 34%, and negative pressure wound therapy was the most commonly used technique. Fistula was the most frequent complication, with the majority forming in the early days after the surgery. The number of interventions and open abdomen time obtained statistical significance in comparison with the outcome. The overall mortality rate was 62,5%.

Conclusion: Despite open abdomen being a technique that can have benefits in controlling intraabdominal contamination and preventing abdominal compartment syndrome, its implementation is associated with complications. The mortality and complication rates were high in this sample. The decision to use the technique should be individualized and based on several factors, including the indications and the patient's clinical status.