Bariatric Surgery Information
Effects of Types of Weight Loss Surgery on Weight and Health

Effect of Gastric Bypass and Stomach Banding

Guide to Weight Loss Surgery - Research Into Gastric Reduction Surgery

Effects of Types of Weight Loss Surgery on Weight and Health

Morbid obesity is defined as a BMI = 40, or BMI = 35 with significant comorbidity. It is associated with premature death, and increased rates of comorbid conditions, such as cardiovascular disease, hypertension, sleep apnoea syndrome, diabetes and osteoarthritis. In addition to reduced physical health, quality of life is poor due to impaired mental well-being and impaired psychosocial function.

Surgical Guidelines

Surgery to aid weight loss should be available as a treatment option for morbid obesity only if all other appropriate non-surgical treatments to loose weight have been tried without success.

Types of Bariatric Surgery Operations

There are two main types of surgical intervention – malabsorptive and restrictive. With malabsorptive surgery, parts of the gastrointestinal tract are bypassed in order to limit the absorption of food. With restrictive surgery, the size of the stomach is restricted so the person experiences the feeling of fullness with less food. Malabsorptive procedures include gastric bypass, biliopancreatic diversion and duodenal switch, while restrictive procedures include vertical banded gastroplasty, horizontal gastroplasty and gastric banding.


The objective of this study was to assess the effects of different techniques of surgery for people suffering from morbid obesity. The clinical endpoints were weight loss, impact on comorbidity factors, quality of life, mortality and complications
of surgery.

Literature Search

The report is based on systematic reviews and guidelines. An additional search for literature (randomised controlled trials, controlled trials and meta-analyses) was performed for the period 2001-2002 to identify more recent studies on topics with little information from the systematic reviews. The following databases was searched: the Cochrane Controlled Trial Register, Database of Abstracts of reviews of Effectiveness (DARE), International Network of Agencies for health Technology Assessment (INAHTA) database, Medline, EMBASE, National Guideline Clearinghouse, PRODIGY Guidance, NICE (National Institue for Clinical Excellence) and SIGN (Scottish Intercollegiate Guidelines Network). The literature search identified seven systematic reviews and three guidelines. The search for primary literature gave 175 hits (Medline) and 129 hits (Embase), 13 possibly relevant studies were assessed, and six of these studies included.

Results and Conclusions

Best Surgery for Weight Loss
Gastric bypass, biliopancreatic diversion and duodenal switch gives the greatest weight losses. However, these methods are comprehensive, and biliopancreatic diversion gives serious malabsorptive disorders. In comparision, gastric banding gives lower weight-reduction but fewer short-time complications and reoperations.

Pre-Operative Assessment
Surgery should be undertaken only after comprehensive, multidisciplinary assessment. A centre of expertise in the surgical management of obesity should be established including healthcare professionals such as psychologists, physician, a specialist surgeon, a specialist anaesthetist, physiotherapist, endocrinologist and dieticians. People considering surgery to achieve weight reduction should discuss in detail with appropriate healthcare professionals the potential benefits and long-term implications of surgery. This includes associated risks, complications and postoperative mortality as well

Nilsen, Ellen; Wisløff.Torbjørn; Søreide, Odd. Norwegian Center for Health Services. SMM Report 1/2003: SINTEF Unimed

Bariatric Surgery

Asymptomatic Liver Disease Gastric Bypass - Gastric Bypass Surgery Bone Mass - Bypass Surgery Cures Diabetes - Calorie Intake Roux-en-Y Gastric Bypass Surgery - Duodenal Switch Bypass - Eating Disorders After Bypass - How Effective is Gastric Bypass - Gastric Bypass Revision - Roux-en-Y Gastric Bypass Issues - Risks of Gastric Bypass - Predictors Complications Gastric Bypass - Vertical Banded Operation Decline - Silastic Ring Vertical Banded Gastroplasty - Hyperhomocysteinemia Gastroplasty - Nerve Damage Stomach Stapling - Laparoscopic Adjustable Gastric Banding Quality Life - Long-Term Results Gastric Banding - Topiramate Gastric Banding - Pouch Dilatation Gastric Banding - New Techniques Bariatric Surgery - Newer Bariatric Surgical Techniques - Extreme Obesity Gastric Bypass - Laparoscopic Gastric Banding Day Surgery - Laparoscopy Gastric Banding Problems - Laparoscopic Distal Gastric Preservation - Laparoscopic Gastrectomy - Laparoscopic Gastric Banding - Laparoscopic Gastric Banding Older Patients - Laparoscopic Mini Gastric Bypass - Laparoscopic Roux-en-Y Gastric Outcomes - Laparoscopic Roux-En-Y Safety - Laparoscopic Weight Loss Surgery - Complications Laparoscopic Surgery - Ketorolac Anaesthesia Bariatric Surgery - Health Improvements Bariatric Surgery - Complications Weight Loss Surgery - Benefits Bariatric Surgery - Benefits Weight Loss Surgery - Bypass Surgery Diabetes - Gastric Banding Cardiovascular - Effects Bypass Surgery Diabetes - Endoscopic Intraluminal Sutures - Infections Abdominal Surgery - Endothelial Function Inflammation - Macrophage Inhibitory Factor Levels - Bariatric Surgery Musculoskeletal Complaints - Obesity Surgery Metabolic Syndrome - Bariatric Surgery Metabolic Syndrome - Pre-Operative Bacterial Treatment - Helicobacter Pylori Weight Loss Surgery - Vertical Banded Gastroplasty Roux-en-Y - Nutrient Deficiencies Bariatric Surgery - Folate Deficiency Gastric Bypass Surgery - Iron Deficiency Gastric Bypass - Vitamin B12 Gastric Bypass Surgery - Nutritional Status Vertical Banded Gastroplasty - Nutritional Consequences Gastric Restrictive Surgery - International Bariatric Surgery Registry - Attitudes Bariatric Surgeons - Cost-Effectiveness Gastric Bypass - Weight Loss Surgery UK - Weight Loss Surgery Wisconsin - Medicare Weight Loss Surgery - Childbearing Weight Loss Surgery - Bariatric Surgery Severely Overweight Adolescents - Bariatric Surgery Older Patients - Bariatric Surgery Mortality - Weight Loss Surgery Effects - Office-Based Surgery - Gastric Banding Ghrelint - Ghrelin Levels Gastric Bypass - Roux-en-Y Gastric Bypass Ghrelin - Group Therapy Gastric Bypass - Obesity Surgery Weight Reduction - Bariatric Surgery Adolescents - Peripheral Neuropathy Bariatric Surgery - Personality Weight Loss Surgery - Pre-Surgery Bariatric Surgery - Pre-Operative Intragastric Balloon - Pre-Operative Psychological Testing Bariatric Operation - Psychosocial Variables Weight Loss Surgery - Radiological Gastroenteric Studies - Regulation Obesity Surgery - Tummy Tuck Men - Body Contouring Surgeries After Weight Loss - Total Body Lift Weight Loss - Apronectomy Liposuction Metabolism - Brachioplasty Arm - Panniculectomy Obesity Surgery - Panniculectomy Results - Large Volume Liposuction - Large Volume Ultrasound Liposuction - Lipoplasty Abdominoplasty - Liposuction Surgery Visceral Fat - Liposuction Diabetes Prevention - Is Liposuction Safe - Articaine Hydrochloride Liposuction - Tumescent Liposuction - Ultrasound-Assisted Liposuction - Circumferential Para-Axillary Superficial Tumescent (CAST) Lipoplasty


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Laparoscopic or open bariatric surgery, such as gastric banding or bypass is not an easy solution to morbid obesity and weight loss. It is a serious surgical procedure, involving health risks. To produce lasting weight loss it requires a long-term patient commitment to eating a healthy diet and following a regular program of physical exercise. Life-long use of nutritional supplements may also be necessary. So, before deciding, discuss your options fully with your doctor. © 2003-2018 Bariatric-Surgery.Info - Terms - Contact - Information - Resources