Two Different Regimens of Bemiparin as a Thromboprophylaxis in Morbidly Obese Surgical Patients

This study compares two different dosing schedules of bemiparin — a low-molecular-weight heparin (blood thinner used to prevent blood clots) — in very obese patients (BMI ≥ 40) who are having surgery. Standard blood thinner doses may not work as well in people with severe obesity, so this study tests whether a higher or more frequent dose gives better protection against dangerous clots. You may be eligible if: - You have a BMI of 40 or higher - You are scheduled for general, gynecological, or bariatric surgery - You are at moderate, high, or very high risk for blood clots (based on Caprini risk score) - You are willing and able to give informed consent You may NOT be eligible if: - You have active bleeding or very low platelet count - You have a history of heparin-induced thrombocytopenia (HIT) - You have severe kidney disease (GFR < 30) or severe liver disease - You have uncontrolled high blood pressure (above 200/120 mmHg) - You have a known allergy to heparin products - You were on anticoagulants within 5 days before surgery - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.