Desperate to achieve weight loss, some patients overlook or minimize the dangers that bariatric surgeries pose. For example, the decreased absorption of food energy, vitamins, and minerals that occurs after a duodenal switch procedure raises the risk of malnutrition and the poor health that can go along with it.
Complications include bleeding, infection, leaks in the intestines, and blood clots in the legs that can travel to the heart, lungs, or brain (causing strokes or heart attacks). Other possible complications include hernias and constrictions in the digestive track, which may result in pain, nausea, vomiting, and an inability to eat.
Patients should also remember that one procedure may not be enough, and that a second or third revisional bariatric surgery may be required. The main reasons for revisional bariatric surgery are unsatisfactory weight loss after the initial procedure; severe nutritional complications such as protein malnutrition; and intolerable side effects such as blocking or narrowing of the digestive tract.