In the search for permanent, profound weight loss, the recent data on gastric bypass has placed it at the forefront. In 2000, Drs. Wittgrove and Clark reported their results with laparoscopic gastric bypass in 500 patients. After one year, the average excess body weight lost was 77%. This loss persisted over time, as 62% of patients maintained a weight loss of 75% or more of excess body weight. In addition, co-morbidities such as diabetes, hypertension, and sleep apnea were reduced overall by 96%.
Gastric Bypass (RNY) evolved from the VBG to provide more consistent and successful weight loss. The small upper pouch is completely separated from the distal stomach which is left in place. A “Y” shaped segment of small bowel is attached to the pouch with a narrow opening. This delays the mixing of food and digestive juices from the distal stomach resulting in poorer absorption of calories and nutrients. This both restricts food intake and interferes with absorption resulting in more consistent weight loss. 80% of patients lose at least half their excess weight with the RNY procedure.
The RNY averages a 3-day hospitalization with a return to full activity in 7-10 days. A liquid protein and soft diet is suggested for 3 weeks post op.
