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Abstract Thirty morbidly obese patients who underwent laparoscopic mini-gastric bypass (LMGB) in Kasr Al-Ainy Hospital between April 2016 and December 2017 were randomized to one of the two techniques studied: Conventional technique 2Fixed gastro-enteric anastomosis 200 cm from the ligament of Treitz3 and Distal technique 2Fixed gastro-enteric anastomosis 400 cm from the ileocecal valve (ICV)3 with measurement of total small bowel length (TSBL). All patients were followed up regularly for one year and both groups were compared as regard weight loss, nutritional deficiencies and gastrointestinal quality of life index (GIQLI).Results: Mean age for all studied patients was 37.7 years ± 9.9 Std. with a range from 18 to 53 years. Mean baseline weight for all studied patients was 143 Kg ± 25.8 Std. with a range from 101 to 204.5 Kg. Mean height for all studied patients was 163.6 cm ± 8.8 Std. with a range from 145 to 188 cm. No statistical significant difference was found between the two studied groups regarding age, sex, baseline weight, height and baseline BMI. Mean total small bowel length (TSBL) from the ligament of Treitz to ileocecal valve for all thirty patients was 696 cm ± 134.4 Std. with a range from 440 to 1000 cm. No statistical significant difference was found between the two studied groups regarding total small bowel length (TSBL), however, statistical significant difference was found between the two studied groups regarding the afferent loop length and the percentage of afferent loop length to total small bowel length (TSBL) |