MagDI to duodenal switch (DS) conversion is a revisional bariatric procedure performed for patients who experience inadequate weight loss, weight regain, metabolic failure, or insufficient hormonal response after a MagDI procedure. The revision removes the magnetic compression anastomosis and reconstructs the anatomy into a full DS, which provides the strongest metabolic effect and the most durable long‑term weight regulation of any bariatric procedure.

The magnetic anastomosis is taken down, the stomach is shaped into a sleeve gastrectomy if needed, and the duodenum is divided just beyond the pylorus. The ileum is divided and reconfigured into separate alimentary and biliopancreatic limbs. The duodenum is connected to the ileum, and the common channel is tailored to metabolic needs.

Benefits include the strongest metabolic improvement, durable long‑term weight loss, reduced hunger, improved glycemic control, and correction of inadequate response to MagDI. DS offers the most powerful hormonal and metabolic effect of any bariatric procedure.

Candidates include patients with inadequate weight loss after MagDI, weight regain, metabolic failure, persistent obesity‑related comorbidities, or those seeking the strongest metabolic procedure available.

The procedure is performed laparoscopically. The magnetic anastomosis 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 advanced metabolic procedures and complex revisional surgery. His expertise ensures safe MagDI takedown and precise DS reconstruction.

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

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

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.

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.

Insurance coverage varies because MagDI is an emerging procedure. Revisional surgery may be covered when medical necessity is documented.

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.