Sonographic Evaluation of Visceral Fat After Bariatric Surgery
|Study Design:||Observational Model: Case-Only
Time Perspective: Prospective
|Official Title:||Sonographic Evaluation of Visceral and Subcutaneous Fat in Morbidly Obese Patients Before and After 3 Different Types of Bariatric Surgery.|
- Decrease in the Visceral Fat Layer Measured by Ultrasound a Day Before and a Year After Surgery. [ Time Frame: 18 months ] [ Designated as safety issue: No ]morbid obese patients undergoing a type of bariatric surgery either a laparoscopic gastric banding, a laparoscopic sleeve astrectomy or a laparoscopic gastric bypass, in our department will be evaluated by ultrasound 1 day before surgery and one year after surgery to determine the amount of visceral fat layer-by centimeters- that was decreased .
- Change in Glucose and Triglyceride Blood Level [ Time Frame: 18 months ] [ Designated as safety issue: No ]finding correlation between sonographic outcome using ultrasound, as measured by the decrease in the level of visceral fat-by centimeters, weight loss and blood levels of triglycerides and glucose.
|Study Start Date:||January 2011|
|Study Completion Date:||January 2014|
|Primary Completion Date:||January 2014 (Final data collection date for primary outcome measure)|
patients undergoing laparoscopic adjustable gastric banding
morbid obese patients undergoing laparoscopic adjustable gastric banding will be evaluated by ultrasound before surgery and one year after surgery to determine the amount of visceral fat layer decreased.
patients undergoing laparoscopic sleeve gastrectomy
morbid obese patients undergoing laparoscopic sleeve gastrectomy will be evaluated by ultrasound before surgery and one year after surgery to determine the amount of visceral fat layer decreased
patients undergoing laparoscopic gastric bypass
morbid obese patients undergoing laparoscopic gastric bypass will be evaluated by ultrasound before surgery and one year after surgery to determine the amount of visceral fat layer decreased
excess visceral fat is a key factor in the development of metabolic syndrome associated with obesity. After bariatric surgery, patients experience weight loss accompanied by a decrease in the amount of total body fat. It is unclear how the different surgical procedures vary in their effect in reducing the amount of the visceral fat layer . Ultrasonography (US) is an effective, efficient method in assessing this metabolically active layer of fat even when compared with gold standard techniques such as computed tomography and magnetic resonance imaging. Only a few studies managed to show the actual decrease in the visceral fat layer after these kinds of bariatric surgeries. The aim is to compare by ultrasound evaluation the extent of fat layers reduction after laparoscopic adjustable gastric banding (LAGB), laparoscopic sleeve gastrectomy (LSG) and laparoscopic roux-en-y gastric bypass (LRYGB).
Visceral fat (VF) will be defined as the depth, in centimeters, from the rectus abdominis muscle to the aorta; and subcutaneous fat (SCF) defined as the depth, in centimeters, from the skin to the rectus abdominis muscle. Results will be compared with anthropometric measures as weight and waist circumference as well as laboratory results to try and find correlation between sonographic improvement and anthropometric and laboratory improvement.
The hypothesis is that the sleeve gastrectomy and gastric bypass being not only a restrictive procedure but also a malabsorptive procedure will have the best results in decreasing the amount of visceral fat.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01285791
|Hadassah Medical Organization|
|Jerusalem, Israel, 91120|
|Principal Investigator:||Ido Mizrahi, M.D||Ministry of Health, Israel|