The Effects of Resected Gastric Volume on Postoperative Weight Loss and Waist-to-Hip Ratio after Sleeve Gastrectomy; A Prospective Study.

Background: This prospective study was carried out to evaluate the effects of resected gastric volume (RGV) on postoperative weight loss and waist-to-hip ratio (WHR) in patients with morbid obesity after laparoscopic Sleeve Gastrectomy (LSG).

Material and method: LSG procedure was performed for a total of 107 patients. Gastric specimen measurements were taken for all patients. Patients' body mass index (BMI), WHR, and percentage of excessive weight loss were recorded and evaluated postoperatively at the 1st, 6th, and 12th months. Patients were divided into three groups based on RGV: Group 1 with RGV lower than 800 ml, Group 2 with RGV between 800 and 1100 cc, and Group 3 with RGV higher than 1100 cc. These three groups were comparatively evaluated.

Results: No statistically significant difference was found between RGV and weight loss or reduction in WHR. There were statistically significant differences in the distribution of ASA scores between patient groups (P<0.05). The maximum inflated volume of the great curvature of the stomach and calibration tube mean values were significantly higher in Group 3 (P<0.05). The operation time was significantly lower in Group 3 (P<0.05). There was no significant difference between the groups in any of the other demographic and clinical values (P>0.05).

Conclusion: No statistically significant difference was found between groups in the present study in terms of weight loss, WHR, and RGV. It is thought that the remaining stomach volume might be more important than the resected stomach volume since weight loss is likely attributed to the reduction in gastric volume.