OAGB to duodenal switch (DS) conversion is a revisional bariatric procedure performed for patients experiencing weight regain, inadequate weight loss, metabolic failure, bile reflux, marginal ulcer, dumping, hypoglycemia, or complications from the original OAGB. The procedure removes the loop bypass configuration, creates or revises a sleeve gastrectomy, and reconstructs a full duodenal switch. DS provides the strongest metabolic effect and the most durable long‑term weight regulation.

The OAGB loop is taken down, the stomach is shaped into a sleeve if needed, and the duodenum is divided just beyond the pylorus. The ileum is divided and reconfigured to create separate alimentary and biliopancreatic limbs. The duodenum is connected to the ileum, and the common channel is tailored to metabolic needs. This provides powerful metabolic improvement and eliminates bile reflux.

Benefits include the strongest metabolic improvement of any bariatric procedure, durable long‑term weight loss, elimination of bile reflux, reduced hunger, improved glycemic control, and excellent outcomes for severe metabolic disease.

Candidates include patients with weight regain, inadequate weight loss, metabolic failure, bile reflux, marginal ulcer, dumping, reactive hypoglycemia, malnutrition, or complications from the original OAGB. Patients seeking the strongest metabolic effect are ideal candidates.

The procedure is performed laparoscopically. The OAGB loop is taken down, a sleeve gastrectomy is created or revised, the duodenum is divided, and the ileum is reconfigured into alimentary and biliopancreatic limbs. Most patients go home the next day.

Risks include bleeding, leak, stricture, nutritional deficiencies, diarrhea, vitamin deficiencies, and weight regain if long‑term habits are not maintained. DS requires lifelong vitamin supplementation and metabolic follow‑up.

Days 1–3: hydration, ambulation, pain control. Week 1: liquids. Week 2: soft foods. Weeks 3–4: gradual return to normal routines. By 30 days: improved energy, reduced hunger, and early metabolic improvements.

Patients typically experience strong metabolic improvement and steady fat loss over 12–18 months. DS offers the most durable long‑term results of any bariatric procedure.

Dr. Nestor de la Cruz‑Muñoz is a nationally recognized bariatric and metabolic surgeon with extensive experience in complex revisional surgery and advanced metabolic procedures such as the duodenal switch. His expertise ensures safe OAGB takedown and precise DS reconstruction.

Most patients lose 22–28% of total body weight (TBWL) over 12–18 months when weight regain was present.

DS conversion offers powerful improvement in type 2 diabetes, insulin resistance, hypertension, dyslipidemia, sleep apnea, and fatty liver disease. Many patients experience rapid metabolic improvement.

Long‑term success requires protein‑forward nutrition, resistance training, avoiding slider foods, maintaining muscle mass, and consistent metabolic follow‑up.

DS eliminates bile reflux by removing the loop configuration. Patients with severe acid reflux may still require hiatal hernia repair or alternative revisional strategies.

Future revision options include limb length adjustments, sleeve tightening, or common channel modification for metabolic balance.

Preserving lean mass is essential. Patients are guided to prioritize protein intake, resistance training, hydration, and body composition monitoring.

Most insurers cover revisional surgery when medical necessity is documented, including metabolic failure, bile reflux, or inadequate weight loss. Requirements may include imaging, endoscopy, and medical clearance.

Pre‑op requirements may include bloodwork, imaging, endoscopy, nutrition consultation, psychological evaluation, and medication adjustments.

Nutrition progresses from clear liquids to full liquids, purees, soft foods, and then regular textures. Protein goals and vitamin supplementation are essential.

Early walking begins immediately after surgery. Light activity continues through week 2. Resistance training typically begins at week 4–6.

Miami is a major hub for patients from Latin America and the Caribbean. Our team supports travel coordination, virtual follow‑up, and streamlined pre‑op evaluation.