Risk factors for postoperative bleeding in bariatric surgery

Area of Science:

• Bariatric Surgery Outcomes
• Surgical Complications
• Predictive Modeling in Medicine

Background:

• Postoperative bleeding is a common and serious complication after bariatric surgery.
• Identifying at-risk patients is crucial for preventing morbidity and mortality.

Purpose of the Study:

• To develop and validate a predictive model for identifying patients at risk of postoperative bleeding.
• To aid clinical decision-making in bariatric surgery patient management.

Main Methods:

• Utilized nationwide Dutch obesity audit data from January 2015 to December 2020.
• Included 59,055 patients undergoing sleeve gastrectomy or gastric bypass.
• Developed a prediction model using logistic regression and internal validation via bootstrapping.

Main Results:

• Postoperative bleeding occurred in 1.5% of patients.
• Key predictors identified: male sex (OR=1.40), age >45 (OR=1.50), BMI <40 (OR=1.22), cardiovascular disease (OR=1.36), and sleeve gastrectomy (OR=1.43).
• The model achieved an Area Under the Curve of 0.612.

Conclusions:

• A clinical decision rule was created to assess postoperative bleeding risk.
• Presence of three or more risk factors indicates an elevated risk.
• The model can guide preventative strategies for high-risk bariatric surgery patients; external validation is recommended.