Assesses nutritional status and coordinates enteral/parenteral nutrition protocols. Use when evaluating nutritional needs, initiating feeding protocols, or managing TPN orders.
Assesses nutritional status and coordinates enteral/parenteral nutrition protocols for hospitalized patients.
Malnutrition affects 30-50% of hospitalized patients and is independently associated with increased length of stay, higher complication rates, impaired wound healing, increased infection risk, and elevated mortality. Despite its prevalence, malnutrition is underdiagnosed and undertreated — only 7-8% of malnourished patients have a malnutrition diagnosis documented in their medical record, resulting in missed reimbursement (malnutrition is a CC/MCC that affects DRG assignment) and suboptimal care.
The Joint Commission requires nutritional screening within 24 hours of admission, and ASPEN (American Society for Parenteral and Enteral Nutrition) guidelines provide evidence-based frameworks for nutrition assessment and intervention. CMS recognizes malnutrition-related ICD-10 codes (E43, E44, E46) as comorbidities affecting case mix. Early nutrition support — initiated within 24-48 hours of admission — improves clinical outcomes, reduces ICU stays, and lowers 30-day readmission rates. Hospitalists must coordinate with dietitians, pharmacists, and nursing to ensure timely and appropriate nutrition delivery.
Before assessing or initiating nutrition support, confirm:
| Step | Parameter | Score |
|---|---|---|
| 1 | BMI | > 20.0 = 0; 18.5-20.0 = 1; < 18.5 = 2 |
| 2 | Unplanned weight loss (3-6 months) | < 5% = 0; 5-10% = 1; > 10% = 2 |
| 3 | Acute disease effect (NPO or likely to be NPO > 5 days) | No = 0; Yes = 2 |
Total score:
| Score | Risk | Action |
|---|---|---|
| 0 | Low | Repeat screening weekly (inpatient) or monthly (outpatient) |
| 1 | Medium | Document dietary intake for 3 days; if adequate, repeat screen; if inadequate, treat as high risk |
| ≥ 2 | High | Dietitian referral, nutrition intervention, set goals and monitoring plan |
Diagnose malnutrition when ≥ 2 of the following are present:
Classification: Acute illness-related (severe) vs. chronic disease-related vs. social/environmental
Caloric needs estimation:
| Method | Calculation | Use Case |
|---|---|---|
| Simple estimate | 25-30 kcal/kg/day (use IBW for obese patients, ABW for normal weight) | General medical patients |
| Critical illness (early) | 15-20 kcal/kg/day (trophic feeding) | ICU days 1-4 |
| Critical illness (later) | 25-30 kcal/kg/day | ICU day 5+ |
| Obesity (BMI > 30) | 11-14 kcal/kg ABW/day OR 22-25 kcal/kg IBW/day | Obese patients to prevent overfeeding |
| Renal failure (non-dialysis) | 25-30 kcal/kg/day; protein 0.6-0.8 g/kg/day | CKD stages 3-5 without dialysis |
| Renal failure (dialysis) | 25-35 kcal/kg/day; protein 1.2-1.5 g/kg/day | Hemodialysis or peritoneal dialysis |
| Hepatic failure | 25-35 kcal/kg/day; protein 1.0-1.5 g/kg/day (do NOT restrict protein unless grade 3-4 HE unresponsive to lactulose) | Cirrhosis |
Protein needs:
Follow the decision hierarchy: Oral > Enteral > Parenteral
Can the patient eat by mouth?
├── YES → Optimize oral intake (diet orders, supplements, snacks,
│ appetite stimulants if indicated)
│ Target: ≥ 60% of estimated needs by mouth
└── NO (NPO, aspiration risk, obtunded, intubated)
└── Is the GI tract functional?
├── YES → Enteral nutrition (tube feeds)
│ Route: NG/OG (short-term < 4 weeks)
│ PEG/PEJ (long-term > 4 weeks)
│ Start within 24-48 hours of admission if intake
│ inadequate
└── NO (ileus, obstruction, severe pancreatitis,
short bowel, high-output fistula)
└── Parenteral nutrition (TPN)
Start if enteral not feasible and patient will be NPO
> 7 days (or > 3-5 days if already malnourished)
Initiating tube feeds:
Monitoring:
Common complications and management:
| Complication | Intervention |
|---|---|
| Diarrhea | Rule out C. diff; consider fiber-containing formula; review medications (sorbitol in liquid meds, magnesium) |
| High GRV | Elevate HOB 30-45°; consider prokinetic (metoclopramide); post-pyloric tube placement |
| Tube clogging | Flush with warm water; do not crush extended-release medications |
| Aspiration risk | HOB elevation 30-45°; post-pyloric feeding; continuous (not bolus) for high-risk patients |
| Hyperglycemia | Insulin protocol; consider diabetic formula (e.g., Glucerna) |
Initiation criteria:
TPN composition:
| Component | Standard Range | Monitoring |
|---|---|---|
| Dextrose | 150-250 g/day (start low: 150-200 g/day) | Glucose Q6h initially; BMP daily |
| Amino acids | 1.0-1.5 g/kg/day | BUN, prealbumin weekly |
| Lipids | 0.5-1.0 g/kg/day (do not exceed 2.5 g/kg/day) | Triglycerides weekly (hold if > 400 mg/dL) |
| Electrolytes | Per BMP and clinical needs | BMP daily until stable, then 2-3x/week |
| Vitamins/trace elements | Standard multivitamin, trace elements | Zinc, copper, selenium if prolonged TPN |
Refeeding syndrome prevention:
For each patient on nutrition support: