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Biliopancreatic diversion with duodenal switch (BPD-DS) is a technically advanced bariatric and metabolic procedure that offers the most profound and durable weight loss and metabolic improvement among current surgical options. This educational activity provides a comprehensive overview of the procedure’s principles, anatomy/physiology, operative technique, patient selection criteria, and long-term management considerations. Learners will review the anatomical reconstruction unique to BPD-DS, its dual restrictive-malabsorptive mechanism, and the evidence supporting its superiority in treating severe obesity and its associated co-morbidities. The activity further examines perioperative strategies to minimize complications, including leak prevention, nutritional surveillance, and internal hernia avoidance. Participants will also explore the ethical and professional responsibilities inherent in performing and managing these patients. Emphasis is placed on the interprofessional collaboration among surgeons, anesthesiologists, advanced practitioners, nurses, dietitians, pharmacists, and behavioral specialists to optimize outcomes and ensure patient safety. By engaging in this course, clinicians will enhance their competence in patient selection, operative planning, postoperative care coordination, and long-term follow-up which ultimately improving patient-centered care and multidisciplinary team performance in bariatric metabolic surgery. Objectives: Evaluate the background of the surgical management of morbid obesity. Identify the indications and contraindications for weight loss surgery and in particular for the biliopancreatic diversion with a duodenal switch. Identify the equipment required and operative technique for the biliopancreatic diversion with a duodenal switch. Collaborate with an interprofessional team to develop strategies to improve patient outcomes. Access free multiple choice questions on this topic.

Surgical management for obesity was proposed based on clinical observations of weight loss in patients after resections of the stomach or small bowel. One of the first weight-loss procedures, developed in 1954, was the jejunoileal bypass. This procedure was abandoned due to its severe side-effect profile. These adverse side effects led to weight-loss procedures being portrayed in an unpopular light.[1] A few pivotal changes in the public's perception of bariatric surgery have included: The National Institutes of Health (NIH) consensus conference in 1992 endorsed vertical gastric banding as a safe and effective option for weight-loss surgery. A 1995 paper reported positive long-term effects of bariatric surgery on the management of diabetes mellitus. Improved bariatric equipment, which decreased postoperative complications In 1994, the first laparoscopic gastric bypass surgery was performed. As the learning curve for laparoscopy leveled, laparoscopic procedures surpassed open surgery in positive, measurable outcomes: fewer wound complications, lower incisional hernia rates, shorter length of stay, and lower overall mortality. Bariatric surgery is an effective modality that can maintain weight loss and decrease obesity-associated comorbid conditions. Obesity is related to the development of comorbidities such as type 2 diabetes, heart disease, hypertension, sleep apnea, and different orthopedic disabilities. Common bariatric surgical procedures performed today include the sleeve gastrectomy, Roux-en-Y gastric bypass, and biliopancreatic diversion with duodenal switch. The biliopancreatic diversion was first described by Scorpinaro in 1979. This procedure combined horizontal gastric resection with closure of the duodenal stump, gastroileal anastomosis, and ileoileal anastomosis to create a 50-cm common channel and a 250-cm alimentary channel.[2] Patients who underwent this procedure suffered from bile gastritis, so it was modified to the duodenal switch procedure by DeMeester in 1987.[3] The duodenal switch evolved into the modern-day biliopancreatic diversion, which includes a sleeve gastrectomy, transection of the duodenum distal to the pylorus, and creation of an alimentary limb measuring 200 to 250 cm.[4]

As with many surgeries, biliopancreatic diversion with duodenal switch complications can be divided into early and late complications. Common early complications include anastomotic leak and hemorrhage; common late complications include nutritional deficiencies. Anastomotic Leak The incidence of a gastric or duodenal leak following biliopancreatic diversion with duodenal switch is 1.14%, compared with 1.12% for Roux-en-Y gastric bypass.[38] The leak site appears to be more common at the duodenoduodenal anastomosis.[39] The risk of leakage from the longitudinal gastric staple line is minimal compared to the leak rate from the gastric staple line in the gastric bypass procedure. These patients may be asymptomatic, but they frequently present with tachycardia, which is usually the first sign. They can also have tachypnea and be febrile. The diagnostic test of choice for an anastomotic leak should be a computed tomography (CT) scan with oral and intravenous contrast, high sensitivity, and specificity. An upper GI series can also be used, but it has a low sensitivity. If the leak is acute (<5 days), they should return to the operating room for exploration, repair, and placement of a distal feeding tube.[40] Hemorrhage The reported incidence of a postoperative hemorrhage is less than 1% of all gastric bypass surgeries, which experience bleeding that requires intervention or transfusion. This can present as intraluminal and extraluminal bleeding. This has likely improved due to improved staple technology. Hemorrhage is more commonly seen with laparoscopic gastric bypass over open procedures.[41] Postoperative hemorrhage is treated at the surgeon's discretion, depending on the patient's clinical picture. For intraluminal bleeding, endoscopic treatment may be necessary, but it is not very common. Patients who have extraluminal bleeding and are hemodynamically unstable and unresponsive to resuscitation will need to return to the operating room for exploration and repair. Nutritional Deficiencies

The reported incidence of a postoperative hemorrhage is less than 1% of all gastric bypass surgeries, which experience bleeding that requires intervention or transfusion. This can present as intraluminal and extraluminal bleeding. This has likely improved due to improved staple technology. Hemorrhage is more commonly seen with laparoscopic gastric bypass over open procedures.[41] Postoperative hemorrhage is treated at the surgeon's discretion, depending on the patient's clinical picture. For intraluminal bleeding, endoscopic treatment may be necessary, but it is not very common. Patients who have extraluminal bleeding and are hemodynamically unstable and unresponsive to resuscitation will need to return to the operating room for exploration and repair. Nutritional Deficiencies Biliopancreatic diversion with duodenal switch is the one bariatric procedure associated with the greatest perioperative malnutrition and metabolic-related complications. All patients need to begin supplementation postoperatively. Common nutritional deficiencies include iron deficiency anemia, protein-calorie malnutrition, hypocalcemia, and deficiencies of the fat-soluble vitamins B1, B12, and folate. Close follow-up and laboratory studies are essential for these patients. If a nutritional deficiency is detected, dietary supplementation is extremely important.[42]

Interprofessional collaboration is essential throughout the continuum of care. The surgeons coordinate preoperative evaluation, risk stratification, and patient education. Anesthesiologists contribute to safe induction and airway management in patients with obesity and related comorbidities. Specialty nurses provide perioperative monitoring, wound care, and reinforce lifestyle and nutrition teaching. Registered dietitians guide individualized dietary progression and micronutrient supplementation to prevent protein-calorie and vitamin deficiencies. Pharmacists review medications for altered absorption and adjust dosing of antihypertensive, diabetic, and anticoagulant therapies. Psychologists and social workers evaluate readiness for behavior change, identify barriers to adherence, and support mental health. Physical and occupational therapists aid in early mobilization and reinforce long-term activity plans to sustain weight loss. Clear, structured communication via multidisciplinary rounds, standardized order sets, and shared electronic documentation will enhance situational awareness, reduce errors, and ensure patient-centered care. A culture of team accountability and ethical practice underpins every phase: ensuring informed consent is truly informed, addressing postoperative complications promptly, and maintaining transparency regarding risks of malabsorption and the lifelong commitment required. High-functioning bariatric programs emphasize regular multidisciplinary conferences, longitudinal follow-up clinics, and quality-tracking registries to optimize outcomes and continually improve team performance.[46] Ultimately, effective collaboration across specialties transforms the complex biliopancreatic diversion with duodenal switch pathway into a safe, patient-centered model of surgical metabolic care.