Efficacy of a low FODMAP diet in irritable bowel syndrome: systematic review and network meta-analysis.
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What patients eat — and what they don't — is one of the strongest levers a nurse has to influence recovery from a gastrointestinal disorder. Across GERD, IBS, IBD, PUD, and celiac disease, well-targeted dietary changes can reduce symptom burden, prevent flares, and rebuild lost weight or nutrient stores. This lesson walks through the highest-yield dietary frameworks the NCLEX expects you to recognize and apply.
FODMAPs — fermentable oligosaccharides, disaccharides, monosaccharides, and polyols — are short-chain carbohydrates that ferment in the gut, drawing water and producing gas. In sensitive patients with IBS this triggers bloating, cramping, and altered bowel habits. The low-FODMAP diet eliminates high-FODMAP foods (apples, onions, garlic, wheat, dairy, sweeteners ending in -ol) and methodically reintroduces them to identify individual triggers.
During GI flare-ups, the priority shifts from optimization to bowel rest. Low-residue (≤10g fiber/day) and low-fiber diets reduce mechanical irritation and stool bulk so inflamed mucosa can heal. For severe flares, the patient may be NPO with enteral (NG/PEG tube) or parenteral (TPN via central line) nutrition until oral intake is safe.
Chronic GI disease frequently leads to malnutrition — be alert for unintentional weight loss >5% in 30 days, BMI <18.5, sarcopenia, hypoalbuminemia, anemia, or fat-soluble vitamin deficiencies (A, D, E, K). For Crohn and celiac, malabsorption drives the deficits even when caloric intake looks adequate. Nutritional rebuild is a nursing priority alongside the medication plan.
A patient with IBS reports improvement in symptoms after following a low-FODMAP diet but still experiences occasional bloating. Which food should the nurse recommend the patient avoid?
Curated PubMed articles to deepen your understanding of this lesson's topics.
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Nutrients
The Nursing Clinics of North America
The Lancet Gastroenterology & Hepatology
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