Bariatric Surgery Patient Education

Las Vegas, Nevada

BARIATRIC SURGERY

PATIENT EDUCATION

A Comprehensive Nursing Guide to Metabolic and Bariatric Surgery

Pre-Operative, Post-Operative, and Long-Term Management

Target Audience: Registered Nurses, Bariatric Nurses, Medical-Surgical Nurses, GI Nurses

Level: Intermediate

Release Date: February 2026 | Expiration Date: February 2029

Nevada State Board of Nursing Approved CE Provider

Author Disclosure

The author and planning committee have no relevant financial relationships to disclose.

Evidence-Based Guidelines Referenced

• ASMBS/IFSO Guidelines on Metabolic and Bariatric Surgery, 2024 • ASMBS Nutritional Guidelines for Bariatric Surgery Patients • AHA/ACC/TOS Obesity Management Guidelines • MBSAQIP Standards Manual

LEARNING OBJECTIVES

Upon completion, the participant will be able to:

Explain the indications and contraindications for metabolic and bariatric surgery based on current guidelines

Compare the mechanisms, expected outcomes, and risks of common bariatric procedures (sleeve gastrectomy, RYGB, SADI-S, AGB)

Develop comprehensive pre-operative education plans addressing diet, lifestyle, and psychological preparation

Implement evidence-based post-operative nursing care including diet progression, complication monitoring, and pain management

Apply nutritional guidelines for vitamin and mineral supplementation in bariatric patients

Recognize and respond to early and late complications of bariatric surgery

Integrate behavioral and psychological support strategies into long-term patient education

SECTION 1: UNDERSTANDING OBESITY AS A DISEASE

1.1 Obesity: A Chronic, Multifactorial Disease

Obesity is now recognized by major medical organizations (AMA, WHO, AACE, TOS) as a chronic, progressive, relapsing disease - not simply a lifestyle choice or lack of willpower. This shift in understanding is critical for patient education and destigmatization.

KEY POINTS FOR PATIENT EDUCATION: • Obesity involves complex interactions of genetics, environment, hormones, and behavior • The body actively defends elevated weight through metabolic and hormonal adaptations • After weight loss, hunger hormones increase and metabolism slows ('metabolic adaptation') • This is why 95% of diets fail long-term - it's biology, not willpower • Surgery works by changing gut hormones and anatomy, not just restriction • Framing obesity as a disease reduces shame and improves treatment engagement

1.2 Health Consequences of Obesity

SECTION 2: INDICATIONS FOR BARIATRIC SURGERY

2.1 Updated Eligibility Criteria (ASMBS/IFSO 2024)

CURRENT INDICATIONS FOR METABOLIC/BARIATRIC SURGERY: • BMI ≥35 kg/m² regardless of comorbidities • BMI 30-34.9 kg/m² with metabolic disease (T2DM, hypertension, dyslipidemia, NAFLD, OSA, others) • BMI ≥30 kg/m² in Asian patients (due to increased metabolic risk at lower BMI) NOTE: The old 'failed diet' requirement has been eliminated. Surgery is first-line treatment for patients meeting criteria who choose surgical management.

2.2 Pre-Operative Evaluation Requirements

MBSAQIP-accredited programs require comprehensive evaluation:

2.3 Contraindications

ABSOLUTE CONTRAINDICATIONS: • Active substance abuse (alcohol, drugs) - requires treatment and documented sobriety • Uncontrolled psychiatric illness or inability to provide informed consent • Medical conditions with prohibitive surgical risk • Inability/unwillingness to comply with post-operative requirements RELATIVE CONTRAINDICATIONS (case-by-case evaluation): • Active smoking (most programs require cessation 4-6 weeks pre-op and permanent abstinence) • Eating disorders (bulimia, binge eating - require treatment first) • Current pregnancy or planned pregnancy within 12-18 months • Advanced liver cirrhosis (may be candidate for combined liver transplant/sleeve) • Inflammatory bowel disease (RYGB relatively contraindicated in Crohn's)

SECTION 3: BARIATRIC SURGICAL PROCEDURES

Modern bariatric surgery has shifted away from purely restrictive or malabsorptive concepts. We now understand these procedures primarily work through hormonal and metabolic mechanisms.

3.1 Sleeve Gastrectomy (VSG)

MOST COMMON PROCEDURE WORLDWIDE (~60% of all bariatric surgeries) ANATOMY: ~80% of stomach removed along greater curvature, leaving banana-shaped 'sleeve.' Pylorus preserved. No intestinal rerouting. MECHANISMS: • Reduced stomach volume (60-150 mL) • Decreased ghrelin (hunger hormone) - fundus removed • Faster gastric emptying • Changes in gut hormones (GLP-1, PYY increase) EXPECTED WEIGHT LOSS: 60-70% excess weight loss (EWL) at 2 years T2DM REMISSION: 50-60% (less than RYGB, but significant) ADVANTAGES: • Technically simpler; shorter operative time • No dumping syndrome • No internal hernia risk • Easier upper GI access for future endoscopy • Can be revised to RYGB or SADI-S if needed DISADVANTAGES: • May worsen or cause de novo GERD (30% of patients) • Not reversible (stomach portion removed) • Less effective for T2DM than bypass procedures • Possible weight regain with sleeve dilation over time

3.2 Roux-en-Y Gastric Bypass (RYGB)

GOLD STANDARD FOR DECADES - Still preferred for many patients ANATOMY: • Small gastric pouch (15-30 mL) created from upper stomach • Roux limb (alimentary limb, 75-150 cm) connected to pouch • Biliopancreatic limb carries digestive enzymes • Common channel where food and enzymes mix MECHANISMS: • Restriction (small pouch) • Hormonal changes (dramatic GLP-1/PYY increase due to rapid delivery to distal gut) • Mild malabsorption • Altered bile acid signaling • Gut microbiome changes EXPECTED WEIGHT LOSS: 70-80% EWL at 2 years (durable at 10+ years) T2DM REMISSION: 70-80% (superior for diabetes control) ADVANTAGES: • Excellent long-term weight loss • Best procedure for T2DM and GERD • Longest track record (decades of data) DISADVANTAGES: • Dumping syndrome (40-50% of patients) - can be considered a feature, not a bug • Internal hernia risk (1-3%) - can cause bowel obstruction • Marginal ulcer risk (1-5%) • Micronutrient deficiencies (iron, B12, calcium) require lifelong supplementation • Difficult endoscopic access to excluded stomach

3.3 Single Anastomosis Duodeno-Ileal Bypass with Sleeve (SADI-S)

NEWER PROCEDURE - Increasingly popular for severe obesity and T2DM ANATOMY: • Sleeve gastrectomy performed first • Duodenum divided distal to pylorus • Sleeve connected to ileum (300 cm from ileocecal valve) • Single anastomosis (simpler than DS which has two) MECHANISMS: • Sleeve restriction and ghrelin reduction • Significant malabsorption (short common channel) • Dramatic hormonal changes • Bypasses most of small intestine EXPECTED WEIGHT LOSS: 75-85% EWL (highest of standard procedures) T2DM REMISSION: 80-90% (most effective for diabetes) ADVANTAGES: • Most effective for weight loss and T2DM • Pylorus preserved (may reduce dumping) • Can be done as revision after sleeve DISADVANTAGES: • Highest malabsorption and nutritional deficiency risk • Requires strict vitamin compliance • More frequent loose stools/diarrhea • Less long-term data than RYGB • Risk of malnutrition if patient non-compliant

3.4 Procedure Comparison Summary

SECTION 4: PRE-OPERATIVE PATIENT EDUCATION

4.1 Pre-Operative Diet

Most programs require a pre-operative diet to shrink the liver, reduce surgical risk, and begin behavior change.

TYPICAL PRE-OP DIET (2-4 weeks before surgery): GOAL: Shrink the liver by depleting glycogen stores. A fatty, enlarged liver makes surgery technically difficult and increases complications. OPTIONS (varies by program): • Liquid diet: Protein shakes (60-80g protein/day), sugar-free liquids, broth • Low-carbohydrate diet: <50g carbs/day, high protein • Very low-calorie diet (VLCD): 800-1000 kcal/day with protein supplementation DURATION: Typically 2 weeks; may be longer for BMI >50 or significant hepatomegaly LAST 24 HOURS: Clear liquids only NPO: Midnight before surgery (or per anesthesia protocol) EDUCATION POINTS: • This is a preview of post-op eating - practice now! • Hunger will decrease after a few days • Headaches are common (carb withdrawal) - will resolve • Compliance affects surgical safety

4.2 Lifestyle Modifications Pre-Surgery

SMOKING CESSATION: MANDATORY • Smoking increases risk of leaks, ulcers, blood clots, and poor wound healing • Most programs require nicotine-free for 4-6 weeks pre-op • Confirmed by nicotine/cotinine testing • Lifetime abstinence strongly recommended • Nicotine replacement (patches, gum) also prohibited (still vasoconstrictive) ALCOHOL: • Stop alcohol 2-4 weeks before surgery • After surgery, alcohol is absorbed faster and has stronger effects • Risk of transfer addiction post-operatively MEDICATION CHANGES: • NSAIDs: Stop 7-14 days before (ulcer risk) • Oral diabetes medications: Usually held day of surgery • Anticoagulants: Managed per surgeon/cardiologist • Birth control: May need bridging (VTE risk with estrogen)

4.3 Setting Realistic Expectations

Patient education should set realistic, evidence-based expectations:

• Average weight loss is 60-75% of EXCESS weight, not total weight • Example: 300 lb patient with ideal weight 150 lb (150 lb excess) → expect to lose 90-110 lb • Weight loss is NOT linear - rapid initially, then slows • Plateau periods are normal and expected • Some weight regain (5-15%) after 2-3 years is common • Surgery is a TOOL - requires lifelong behavior change • Not everyone reaches 'normal' BMI - comorbidity improvement is also success • Loose skin is common and may require plastic surgery later (not always covered by insurance)

SECTION 5: POST-OPERATIVE NURSING CARE

5.1 Immediate Post-Operative Period (Hospital)

POST-OP DAY 0-1 NURSING PRIORITIES: • AIRWAY/BREATHING: OSA patients at high risk; may need CPAP; semi-Fowler's position; incentive spirometry • VTE PROPHYLAXIS: SCDs, early ambulation (within 4-6 hours if able), pharmacologic prophylaxis (enoxaparin or heparin) • PAIN MANAGEMENT: IV opioids initially → transition to liquid/crushable PO; avoid NSAIDs permanently (RYGB) or long-term (sleeve) • FLUID MANAGEMENT: IV fluids initially; sipping clear liquids when awake and no leak suspected; goal 64+ oz/day eventually • MONITORING FOR LEAKS: Tachycardia (HR >120 persistent), fever, increasing pain, left shoulder pain, anxiety/sense of 'something wrong' • NAUSEA: Common; ondansetron, promethazine; small sips only • BLOOD GLUCOSE: Diabetics may have dramatic improvement immediately; monitor closely and adjust insulin/medications to prevent hypoglycemia • DISCHARGE: Most patients discharge POD 1-2 for sleeve, POD 1-3 for RYGB

5.2 Diet Progression

5.3 Eating Rules for Life

LIFELONG DIETARY PRINCIPLES: 1. PROTEIN FIRST: 60-80g/day minimum; eat protein at beginning of each meal 2. EAT SLOWLY: 20-30 minutes per meal; put fork down between bites 3. CHEW THOROUGHLY: 20-30 chews per bite; food should be 'mush' before swallowing 4. STOP WHEN FULL: Learn to recognize 'soft stop' (comfortable) vs 'hard stop' (pain/nausea) 5. SEPARATE FOOD AND FLUIDS: No drinking 30 min before, during, or 30 min after meals 6. HYDRATE: 64+ oz daily between meals; sip throughout day 7. AVOID: Carbonation (stretches pouch), straws (air ingestion), sugar (dumping/poor nutrition) 8. NO GRAZING: Structured meals and snacks only; grazing leads to weight regain 9. LIMIT ALCOHOL: Absorbed faster, more calories, risk of transfer addiction 10. SUPPLEMENTS: Take vitamins as prescribed - for life

SECTION 6: NUTRITIONAL SUPPLEMENTATION

Micronutrient deficiencies are common and potentially serious complications of bariatric surgery. Lifelong supplementation is required.

6.1 ASMBS Supplementation Guidelines

6.2 Laboratory Monitoring Schedule

MONITORING FREQUENCY: • 3 months post-op: CBC, CMP, lipid panel, B12, iron studies, vitamin D • 6 months post-op: Same as above • 12 months post-op: Full panel including PTH, folate, thiamine, vitamins A/E (if SADI-S/DS) • Annually thereafter: Full micronutrient panel • More frequent if deficiencies identified or symptoms develop CRITICAL TEACHING: 'Your vitamins are NOT optional. They are as essential as your heart or blood pressure medications. Stopping them will make you sick - not immediately, but over months to years. The consequences can include permanent nerve damage, bone loss, severe anemia, and even death. Take them every day for the rest of your life.'

SECTION 7: COMPLICATIONS AND MANAGEMENT

7.1 Early Complications (Days to Weeks)

7.2 Late Complications (Months to Years)

7.3 Dumping Syndrome - Patient Education

DUMPING SYNDROME (Common after RYGB and SADI-S): EARLY DUMPING (10-30 minutes after eating): • Cause: Rapid delivery of hyperosmolar food to small intestine → fluid shift • Symptoms: Nausea, cramping, diarrhea, sweating, palpitations, dizziness • Trigger: Sugar, simple carbs, high-fat foods LATE DUMPING (1-3 hours after eating): • Cause: Reactive hypoglycemia from insulin overshoot • Symptoms: Weakness, sweating, confusion, shakiness, hunger • Trigger: Same as early dumping PREVENTION: • Avoid sugar and simple carbs (biggest trigger) • Eat protein first, then vegetables, then complex carbs • Eat slowly; chew thoroughly • No drinking with meals (30-min separation) • Lie down after meals if early dumping occurs NOTE: Many surgeons view dumping as a 'feature, not a bug' - it provides negative feedback for poor food choices.

SECTION 8: PSYCHOLOGICAL AND BEHAVIORAL SUPPORT

8.1 Emotional Adjustment After Surgery

The psychological journey after bariatric surgery is as important as the physical one. Nurses play a key role in supporting patients through this transition.

COMMON EMOTIONAL EXPERIENCES: • 'HONEYMOON PHASE' (0-6 months): Excitement, rapid weight loss, positive attention, high motivation • 'REALITY PHASE' (6-18 months): Plateau periods, frustration, testing limits, dealing with loose skin, relationship changes • 'LONG-TERM ADJUSTMENT': Developing new identity, maintaining behaviors, coping without food POTENTIAL PSYCHOLOGICAL CHALLENGES: • Depression recurrence (even if improved initially) • Body image issues (excess skin, 'phantom fat') • Relationship changes (positive and negative) • Grief over loss of food as coping mechanism • 'Transfer addiction' to alcohol, shopping, gambling, etc. • Social situations around food • Identity shifts ('Who am I without my weight?')

8.2 Red Flags Requiring Referral

REFER TO MENTAL HEALTH PROFESSIONAL IF: • Signs of depression or anxiety that are worsening or not improving • Suicidal ideation (risk is elevated in bariatric population) • Concerning eating behaviors: Purging, excessive restriction, grazing, food sneaking • Increased alcohol use or new substance use • Significant relationship problems or abuse concerns • Self-harm behaviors • Severe body dysmorphia • Non-compliance with medical recommendations that seems to have psychological basis

8.3 Support Resources

• Bariatric support groups (in-person and online) • Individual therapy with bariatric-experienced therapist • Couples/family therapy when appropriate • OA (Overeaters Anonymous) or similar 12-step programs • Online communities (ObesityHelp, BariatricPal) • Registered dietitian for ongoing nutrition counseling • Exercise programs designed for post-bariatric patients • Body contouring consultations when appropriate

SECTION 9: CASE STUDIES

Case Study 1: Pre-Operative Education

PATIENT: Jennifer M., 42-year-old female BMI: 44 kg/m² (5'4", 256 lbs) COMORBIDITIES: Type 2 diabetes (HbA1c 8.2%), hypertension, sleep apnea on CPAP, GERD SURGERY PLANNED: Roux-en-Y gastric bypass in 4 weeks

QUESTIONS:

1. Why is RYGB a good choice for this patient given her comorbidities?

2. What pre-operative education priorities would you address?

3. What medication changes might be needed immediately post-op?

ANSWERS: 1. RYGB is excellent for this patient because: (a) Best procedure for T2DM - 70-80% remission rate, (b) Will improve or resolve GERD (sleeve would likely worsen it), (c) Good outcomes for HTN and OSA. 2. Pre-op education priorities: • Pre-operative liquid diet for 2 weeks to shrink liver • Smoking cessation (if applicable) - verify abstinence • Medication review - will need to hold NSAIDs permanently, adjust diabetes meds • CPAP compliance - critical for surgical safety • Set realistic weight loss expectations (70-80% EWL) • Introduce lifelong eating rules and vitamin requirements • Psychological preparation for relationship with food changing 3. Immediate post-op medication changes: • Blood glucose will improve dramatically - monitor closely for HYPOGLYCEMIA • May need to reduce or stop diabetes medications immediately • Blood pressure may normalize - monitor and reduce antihypertensives as needed • May be able to discontinue or reduce CPAP requirements

Case Study 2: Post-Operative Complication

PATIENT: Robert K., 38-year-old male, POD #1 after sleeve gastrectomy VITALS: HR 124, BP 98/62, RR 22, Temp 37.9°C, O2 sat 94% on RA COMPLAINT: Increasing abdominal pain, feeling anxious, 'something is wrong'

QUESTIONS:

1. What complication should you suspect?

2. What nursing actions are priority?

ANSWERS: 1. ANASTOMOTIC/STAPLE LINE LEAK - the clinical picture is classic: • Persistent tachycardia (often the FIRST and most reliable sign) • Low-grade fever • Hypotension • Increasing pain • Anxiety/'sense of doom' • This is a surgical emergency 2. Priority nursing actions: • Notify surgeon IMMEDIATELY - do not delay • Keep patient NPO • Verify IV access; may need additional large-bore IV • Prepare for stat CT with oral contrast • Anticipate transfer to OR or ICU • Oxygen as needed • Monitor vitals continuously • Draw labs (CBC, lactate, BMP) • Emotional support to patient and family

Case Study 3: Long-Term Follow-Up

PATIENT: Michelle T., 45-year-old female, 3 years post-RYGB ORIGINAL BMI: 52 → Current BMI: 32 (lost 120 lbs, regained 20 lbs over past year) COMPLAINTS: Fatigue, hair thinning, occasional tingling in feet LABS: Hgb 10.2, MCV 72, ferritin 8, B12 180 (low normal), vitamin D 18

QUESTIONS:

1. What nutritional deficiencies does she have?

2. How would you address the weight regain?

ANSWERS: 1. Nutritional deficiencies: • Iron deficiency anemia (low Hgb, low MCV [microcytic], very low ferritin) • Borderline B12 deficiency (may explain tingling - neuropathy) • Vitamin D deficiency (<30 ng/mL) Intervention: IV iron infusion (oral will be poorly absorbed); increase B12 (sublingual or IM injections); high-dose vitamin D supplementation; review and reinforce vitamin compliance. 2. Addressing weight regain: • Assess vitamin/supplement compliance (non-compliance suggests broader behavioral drift) • Dietary assessment: Grazing? Sugar? Liquid calories? Portion sizes? • Rule out anatomic issues (pouch/stoma dilation) - may need EGD • Review eating behaviors - eating too fast? Drinking with meals? • Assess physical activity • Screen for depression, life stressors, emotional eating • Consider referral to bariatric dietitian and/or support group • GLP-1 agonist medication may be appropriate adjunct • Revision surgery only if significant anatomic problem and other measures fail