[One-anastomosis gastric bypass with a short limb]

To develop an acceptable method of surgical treatment of patients with obesity grade 1 and 2 in accordance with the following criteria: high safety, no risk or minimal risk of intestinal malabsorption, no limitations for postoperative gastrointestinal examination, no need for organ resection and surgical reversibility in case of necessity.

In accordance with the above-mentioned criteria, we have modified OAGB (one-anastomosis gastric bypass). A gastric tube was formed from a lesser curvature using 33Fr stomach catheter with a length of at least 25 cm. Manual retrogastric retrocolic anastomosis in «end-to-side» fashion was performed within 20 cm from the ligament of Treitz. This type of anastomosis made it possible to preserve gastric tube length as much as possible that reduces the risk of jejunogastroesophageal reflux.

There were 16 patients (15 females and 1 male) aged 23-48 years for the period from June 2019 till March 2020. Mean weight of patients was 86.12 kg (range 62-124). Mean BMI was 35.15 kg/m² (ranged 21.96-39.62). In 6 months after surgery, all patients achieved normal BMI. Man BMI dropped to 23.8 kg/m². Minimal excessive weight loss was 81.8%, maximal excessive weight loss - 125%. Control esophagogastroduodenoscopy was performed in 5 patients after 6 months and later. During retrograde duodenoscopy, we visualized major duodenal papilla in all cases using a flexible endoscope with standard optic system.

The proposed modification of one-anastomosis gastric bypass with a short limb is a safe and effective procedure in bariatric surgery. This surgery ensures postoperative diagnostic and therapeutic endoscopic procedures in all parts of stomach and duodenum. This method could be recommended for surgical treatment of patients with obesity grade 1 and 2 after additional clinical trials and analysis of long-term results.