{"id":4422636,"date":"2025-01-12T08:36:53","date_gmt":"2025-01-12T14:36:53","guid":{"rendered":"https:\/\/myendoconsult.com\/learn\/topics\/obesity\/"},"modified":"2025-01-12T08:45:45","modified_gmt":"2025-01-12T14:45:45","slug":"obesity","status":"publish","type":"oen_topic","link":"https:\/\/myendoconsult.com\/learn\/topics\/obesity\/","title":{"rendered":"Obesity"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Definition of Obesity<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Obesity<\/strong>: Excess adipose tissue that impairs health.<\/li>\n\n\n\n<li><strong>Classification by Body Mass Index (BMI)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Underweight: &lt;18.5 kg\/m\u00b2<\/li>\n\n\n\n<li>Normal weight: 18.5\u201324.9 kg\/m\u00b2<\/li>\n\n\n\n<li>Overweight: 25.0\u201329.9 kg\/m\u00b2<\/li>\n\n\n\n<li>Class I Obesity (Obese): 30.0\u201334.9 kg\/m\u00b2<\/li>\n\n\n\n<li>Class II Obesity (Moderately obese): 35.0\u201339.9 kg\/m\u00b2<\/li>\n\n\n\n<li>Class III Obesity (Severely obese): 40.0\u201349.9 kg\/m\u00b2<\/li>\n\n\n\n<li>Class IV Obesity (Super morbidly obese): \u226550 kg\/m\u00b2<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Ethnic-Specific Considerations<\/strong>: In Asian populations, a BMI \u226523 kg\/m\u00b2 is considered overweight, and \u226530 kg\/m\u00b2 is obese.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Prevalence &amp; Impact<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Epidemic<\/strong>: Over 66% of U.S. adults are overweight\/obese.<\/li>\n\n\n\n<li><strong>Associated Morbidity<\/strong>: Increased risk for type 2 diabetes, hypertension, dyslipidemia, cardiovascular disease, certain cancers, obstructive sleep apnea, and joint disease.<\/li>\n\n\n\n<li><strong>Mortality<\/strong>: Higher in obese individuals due to cardiovascular and metabolic complications.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Clinical Assessment<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Body Mass Index (BMI)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Surrogate measure of total body fat.<\/li>\n\n\n\n<li>May overestimate body fat in very muscular individuals.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Waist Circumference<\/strong>\n<ul class=\"wp-block-list\">\n<li>Estimates central (visceral) fat distribution.<\/li>\n\n\n\n<li>Cutoffs for increased cardiometabolic risk:\n<ul class=\"wp-block-list\">\n<li>Men: >102 cm, Women: >88 cm.<\/li>\n\n\n\n<li>Asian Men: >90 cm, Asian Women: >80 cm.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Waist-Hip Ratio<\/strong>\n<ul class=\"wp-block-list\">\n<li>Men: >0.9, Women: >0.85 indicative of abdominal obesity.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>History<\/strong>\n<ul class=\"wp-block-list\">\n<li>Age of onset, dietary habits, physical activity, past weight-loss attempts, medication review, comorbidities.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Physical Exam<\/strong>\n<ul class=\"wp-block-list\">\n<li>Blood pressure, signs of sleep apnea, evidence of Cushing syndrome or hypothyroidism (if suspected).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Laboratory Tests<\/strong>\n<ul class=\"wp-block-list\">\n<li>Fasting plasma glucose, lipids.<\/li>\n\n\n\n<li>Additional testing for suspected conditions (e.g., overnight oximetry for obstructive sleep apnea).<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Etiology<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Lifestyle<\/strong>: Excess caloric intake, sedentary behavior.<\/li>\n\n\n\n<li><strong>Medical Causes (rare)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Cushing syndrome,<\/li>\n\n\n\n<li>Hypothyroidism,<\/li>\n\n\n\n<li>Hypothalamic lesions.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Medications<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Corticosteroids,<\/li>\n\n\n\n<li>Some antipsychotics,<\/li>\n\n\n\n<li>Antidepressants,<\/li>\n\n\n\n<li>Certain antiepileptics,<\/li>\n\n\n\n<li>Thiazolidinediones,<\/li>\n\n\n\n<li>Insulin.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Management Goals<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Health Improvement<\/strong>: Reduce obesity-related comorbidity risk.<\/li>\n\n\n\n<li><strong>Weight Reduction<\/strong>: Aim for ~10% weight loss over 6 months.<\/li>\n\n\n\n<li><strong>Long-Term Maintenance<\/strong>: Key to preventing regain.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Treatment Approaches<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Lifestyle Modifications<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Dietary Intervention<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Calorie reduction (balance deficit ~500\u2013750 kcal\/day),<\/li>\n\n\n\n<li>Emphasize fruits, vegetables, fiber, lean proteins,<\/li>\n\n\n\n<li>Reduce dietary fat (20\u201330% of calories),<\/li>\n\n\n\n<li>Limit sugar-sweetened beverages.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Physical Activity<\/strong>:\n<ul class=\"wp-block-list\">\n<li>\u226530 min\/day moderate-intensity isotonic exercise,<\/li>\n\n\n\n<li>Increase daily steps (pedometer).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Behavior Therapy<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Journaling (food\/exercise logs),<\/li>\n\n\n\n<li>Stress management,<\/li>\n\n\n\n<li>Goal setting,<\/li>\n\n\n\n<li>Stimulus control,<\/li>\n\n\n\n<li>Cognitive restructuring.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Pharmacotherapy<\/strong>\n<ul class=\"wp-block-list\">\n<li>For patients with BMI \u226530 or \u226527 with obesity-related comorbidities.<\/li>\n\n\n\n<li>Agents vary (e.g., appetite suppressants, malabsorption inducers).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Bariatric Surgery<\/strong>\n<ul class=\"wp-block-list\">\n<li>For severe obesity (BMI \u226540 or \u226535 with comorbidities).<\/li>\n\n\n\n<li>Various procedures (restrictive, malabsorptive, or both).<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Indications for Surgery<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Patient Eligibility<\/strong>\n<ul class=\"wp-block-list\">\n<li>Class IV obesity: BMI \u226550 kg\/m\u00b2 (super morbid obesity)<\/li>\n\n\n\n<li>Class III obesity: BMI \u226540\u201349.9 kg\/m\u00b2 (severe obesity)<\/li>\n\n\n\n<li>Class II obesity: BMI \u226535\u201339.9 kg\/m\u00b2 with serious obesity-related conditions<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Effectiveness<\/strong>\n<ul class=\"wp-block-list\">\n<li>Most effective treatment for clinically severe obesity<\/li>\n\n\n\n<li>Average 30\u201335% total body weight loss, maintained in ~60% at 5 years<\/li>\n\n\n\n<li>Resolves or improves many comorbidities (diabetes, obstructive sleep apnea, hypertension, hyperlipidemia, fatty liver)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Contraindications<\/strong>\n<ul class=\"wp-block-list\">\n<li>Binge eating disorder<\/li>\n\n\n\n<li>Substance abuse (drugs\/alcohol)<\/li>\n\n\n\n<li>Major depression\/psychosis<\/li>\n\n\n\n<li>High anesthetic risk from other medical disorders<\/li>\n\n\n\n<li>Inability to adhere to postoperative dietary guidelines<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Surgical Approaches<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Restrictive Procedures<\/strong>\n<ul class=\"wp-block-list\">\n<li>Limit stomach capacity and slow gastric emptying; small-intestine absorption largely intact.<\/li>\n\n\n\n<li><strong>Examples<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Laparoscopic Adjustable Gastric Banding<\/strong>\n<ul class=\"wp-block-list\">\n<li>Silicone band placed near gastroesophageal junction<\/li>\n\n\n\n<li>Diameter adjusted via subcutaneous reservoir<\/li>\n\n\n\n<li>Fewer metabolic issues; purely restrictive<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Sleeve Gastrectomy<\/strong>\n<ul class=\"wp-block-list\">\n<li>Partial gastrectomy removing greater curvature<\/li>\n\n\n\n<li>Creates narrow tubular stomach (\u201csleeve\u201d)<\/li>\n\n\n\n<li>Reduced ghrelin production \u2192 lower appetite<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Restrictive\u2013Malabsorptive Procedures<\/strong>\n<ul class=\"wp-block-list\">\n<li>Combine small gastric pouch + re-routing of intestine \u2192 mild to moderate malabsorption<\/li>\n\n\n\n<li><strong>Examples<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Roux-en-Y Gastric Bypass (RYGB)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Small gastric pouch (&lt;30 mL)<\/li>\n\n\n\n<li>Roux limb of small intestine attached to pouch<\/li>\n\n\n\n<li>Mild malabsorption, dumping syndrome<\/li>\n\n\n\n<li>Can be done laparoscopically (faster recovery)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Biliopancreatic Diversion<\/strong>\n<ul class=\"wp-block-list\">\n<li>Partial gastrectomy + long segment intestinal bypass<\/li>\n\n\n\n<li>More malabsorption, higher risk of nutritional issues<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Biliopancreatic Diversion with Duodenal Switch<\/strong>\n<ul class=\"wp-block-list\">\n<li>Variation preserving the pylorus<\/li>\n\n\n\n<li>Less diarrhea &amp; stomal ulceration vs. standard diversion<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Complications &amp; Nutritional Management<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Operative Risk<\/strong>\n<ul class=\"wp-block-list\">\n<li>Overall mortality &lt;1%<\/li>\n\n\n\n<li>Reoperation or endoscopic dilation for strictures<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Common Postoperative Issues<\/strong>\n<ul class=\"wp-block-list\">\n<li>Stoma stenosis or marginal ulcers (~15%): Presents with nausea\/vomiting, dysphagia to solids<\/li>\n\n\n\n<li>Nutrient Deficiencies (particularly with combined malabsorptive procedures):\n<ul class=\"wp-block-list\">\n<li>Iron, calcium, folate<\/li>\n\n\n\n<li>Vitamins B12, D, E<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Protein malnutrition in extreme cases if dietary compliance is poor<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Definition of Obesity Prevalence &amp; Impact Clinical Assessment Etiology Management Goals Treatment Approaches Indications for Surgery Surgical Approaches Complications &amp; Nutritional 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