Pre-operative Weight Loss Program for Obese Patients Undergoing Laparoscopic Gastrectomy.

Background : The aim of this study was to investigate the influence of obesity and the usefulness of a pre-operative weight loss program (PWLP) for obese patients undergoing laparoscopic gastrectomy (LG) for gastric cancer (GC). Materials and Methods : Study1 : 219 patients who underwent laparoscopic distal gastrectomy (LDG) for GC were divided into 2 groups : body mass index (BMI) ≧ 28 and BMI < 28kg / m2. The influence of BMI in LG surgery was investigated. Study2 : The BMI ≧ 28 kg / m2 patients with a planned LG (n = 8) undertook a PWLP including calorie restriction and exercise. The effects of this program were evaluated. Results : Study1 :  The BMI ≧ 28kg / m2 group showed significantly longer operation times, more blood loss and a higher frequency of post-operative complications than that of the BMI < 28kg / m2 group. Study 2 : The patients achieved a weight loss of 4.2%. The visceral fat area (VFA) was significantly decreased by 10.6%, whereas skeletal muscle mass was unaffected. The PWLP group showed shorter operation times, less blood loss and a lower frequency of post-operative complications compared with that of the BMI ≧ 28kg / m2 group. Conclusion : Obesity is an important risk factor and a pre-operative weight loss program is useful for obese patients undergoing a LG. J. Med. Invest. 68 : 165-169, February, 2021.