الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 107 |  |  |
| | | from | 107 | | |
Abstract
The stomach is the dilated part of the alimentary tract that lies between the oesophagus and duodenum. It is composed of cardia, fundus, body and antrum then the pyloric canal that leads to the pylorus. It is normally collapsed in the fasting state on regular non contrast abdominal MDCT. It can be filled with fluid or air or contrast media or both air and contrast media in order to be visualized. The stomach is responsible for secretion of a virtue of digestive enzymes, gastric acid and hormones, one of them is called Ghrelin (Hunger hormone) that is responsible for sense of hunger via its central nervous system effect, it is mainly secreted from the fundus of stomach. Obesity in adulthood is defined as body mass index (BMI) greater than or equal to 30. Many factors are thought to be contributing in obesity, but most are around the increased intake of energy-dense foods that are high in fat; and an increase in physical inactivity. Obesity is a risk factor for a long list of diseases (i.e. cardio-vascular diseases, Diabetes Mellitus, osteoarthritis, etc,) The rising learning curve in bariatric surgery influenced the management of obesity with high success rates of bariatric operations as well as minimal access surgery in form of laparoscopic sleeve gastrectomy procedure that entails rapid after operation recovery and shorter hospital stay. Factors influencing weight loss after sleeve gastrectomy include the reduction of plasmatic ghrelin levels which contributes to satiety, lower appetite stimulation, and consequently, weight loss. The resection of the pyloric antrum might also be associated with an increase in gastric emptying without increasing gastro-oesophageal reflux or the risk of leaks. It has also been suggested that accelerated gastric emptying associated with enhanced postprandial cholecystokinin and glucagon-like peptide-1 concentration could contribute to improved weight loss and glucose metabolism. The increased rate of gastric sleeve procedure performance, evaluation of remaining gastric pouch volume becomes necessary to determine the actual relation between the size of gastric pouch and body weight changes. This evaluation helps proper decision making in the long-term complications of sleeve gastrectomy as well as weight regain