Lesson reader
Domain II, Planning and Intervention
Medical Nutrition Therapy Across Conditions
Reason from pathophysiology to a monitored prescription
Medical nutrition therapy is not a list of diets attached to diagnoses. Start with the active pathophysiology, disease stage, treatment, symptoms, route of intake, nutrition status, laboratory trends, medications, function, and patient priorities. Identify the nutrition mechanism that can change: inadequate intake, altered digestion or absorption, abnormal metabolism, excess loss, organ clearance, inflammation, or a food and medication interaction. Then prescribe a specific intervention with a dose, route, schedule, duration, monitoring plan, and safety limits. Two people with the same diagnosis may need opposite actions because one is depleted and losing weight while the other is stable, or because kidney function, dialysis, wounds, treatment toxicity, swallowing, and goals differ. Use current condition-specific guidance, but individualize it to measured response.
Reference list
Sources
- ASPEN Adult Critical Care Guideline Summary
- ASPEN PN Essential Resources, including Appropriate Dosing for Parenteral Nutrition
- American Diabetes Association Standards of Care in Diabetes, 2026
- KDOQI Clinical Practice Guideline on Nutrition in CKD
- NIAID Food Allergy Guidelines
- National Cancer Institute Nutrition During Cancer Treatment
- NIDDK Digestive Diseases
- American Psychiatric Association Eating Disorders Guideline
- Clinical Practice Guidelines for Patients Undergoing Bariatric Procedures
- NHLBI Heart-Healthy Foods