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Q&A with Australian Health Practitioners
Since surgery reduces food intake does that mean that the patient will have a smaller appetite?
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Dr Vytauras Kuzinkovas
Bariatric (Obesity) Surgeon, General Surgeon, Upper GI Surgeon (Abdominal)
Dr V. Kuzinkovas is a UK trained Consultant Surgeon, specializing in Upper Gastro-Intestinal, Obesity, advanced Laparoscopic and Gastro-Esophageal cancer Surgery. He has Visiting Medical Officer … View Profile
All the operations reduce the sensation of hunger in between the meals. However the satiety control is much more prominent after Sleeve Gastrectomy and Gastric Bypass operations.
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Dr Michael Hii
Bariatric (Obesity) Surgeon, Upper GI Surgeon (Abdominal)
Mr Michael Hii is an Upper Gastro Intestinal surgeon, who specializes in diseases of the oesophagus, stomach and adrenal glands. Mr Hii completed training in … View Profile
The measurement of appetite, and the effect of medical treatments on appetite is complex. In short most bariatric operations reduce appetite, which is one of the major differences between weight loss surgery and going on a prolonged diet.
For several weeks to months after most surgery on the stomach, patients describe a marked reduction in appetite, however this can and usually does return to normal. Patients after sleeve gastrectomy are the most likely to describe a persisting reduction in appetite. This is because the part of the stomach that secretes one of the hunger hormones is resected. The more noticeable clinical benefit for patients after the other common types of bariatric surgery is the effect on satiety. This refers to the sensation of being full, or satisfied or comfortable after a meal.
For patients with a gastric band, this is probably related to the reduced speed of eating. For patients after sleeve gastrectomy and bypass this is related to the vastly reduced size and elasticity of the remaining stomach.
This feeling of satiety is thought to be a major reason why sustained weight loss is more likely after surgery, than with dieting alone (where people often feel persistently hungry).
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