“…Since absorbable membranes are expensive, they could be reserved to a specific population, at higher risk of developing complications. While leak risk factors are well studied [5][6][7][8][9], hemorrhage risk factors are not well established. In addition to the most commonly accepted leak risk factors (such as BMI > 50 kg/m 2 , severe sleep apnea, diabetes, age over 60, and previous gastric surgery), we have chosen two other potential risk factors for bleeding: hypertension and anticoagulant therapy.…”