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Rationale: Sleeve gastrectomy is the most frequent surgery performed worldwide in bariatric surgery. In recent years, there has been an increase in the tendency to perform this procedure using a single port; however, to date, there have been no reports of this magnet-assisted surgery. We developed a magnet-assisted sleeve gastrectomy technique to demonstrate the use of magnets in different steps of the surgery to perform this procedure. Patient Concerns: A 38-year-old woman with a body mass index of 36.2 kg/m2 attended the clinic with the desire to lose weight in order to improve her living conditions. Diagnosis: Based on her weight and height, the patient's body mass index was diagnosed as obese grade II. During the examination by the multidisciplinary team, the patient presented with a blood pressure of 133/86 mm Hg and was diagnosed with hypertension. Intervention: The sleeve gastrectomy technique was performed in a standard manner using a single port located in the umbilicus and a 5-mm port in the right upper quadrant. In addition, we used a magnet positioned on the outside of the patient's abdomen, and a grasper coupled to a magnet was positioned in different parts of the cavity to assist in different steps of the surgery. Outcomes: The surgery was successfully completed with no intraoperative complications with the use of magnetic devices. The patient was discharged 36 hours postoperatively with nutritional indications. At the month follow-up the patient lost 7 kg of initial weight. Lessons: The use of a novel magnetic device can achieve a greater degree of ease in the face of difficulties associated with single-port sleeve gastrectomy.

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