Tube Feed Calculator – Enteral Nutrition Planning
Calculate tube feeding rates for enteral nutrition management
For informational purposes only. Always consult healthcare professionals for nutrition therapy plans.
Table of Contents
How to Use
- Enter target daily caloric needs
- Enter formula caloric density (cal/mL)
- Enter feeding duration (hours per day)
- Select continuous or bolus feeding method
- For bolus feeding, enter number of feedings per day
What is Tube Feeding?
Tube feeding, or enteral nutrition, delivers liquid nutrition directly into the stomach or small intestine through a feeding tube. It's used when a person cannot eat enough food by mouth but has a functioning gastrointestinal tract.
Common types include nasogastric (NG), nasojejunal (NJ), gastrostomy (G-tube), and jejunostomy (J-tube) tubes. The feeding method and rate depend on the patient's condition, tube type, and tolerance.
Continuous vs. Bolus Feeding
| Method | Description | Advantages | Disadvantages |
|---|---|---|---|
| Continuous | Slow, steady infusion over 16-24 hours | Better tolerance, reduced aspiration risk, smaller gastric volumes | Requires pump, limits mobility, continuous setup |
| Bolus | Larger volumes given 4-6 times daily over 15-30 minutes | More physiologic, greater mobility, no pump needed | Higher aspiration risk, may cause cramping or diarrhea |
Formula Caloric Densities
- Standard formulas: 1.0-1.2 cal/mL (most common)
- High-calorie formulas: 1.5-2.0 cal/mL (for fluid restriction)
- Low-calorie formulas: 0.5-0.8 cal/mL (for specific conditions)
- Specialized formulas: Vary based on protein, fiber, or disease-specific needs
Safe Administration Guidelines
- Start feeds slowly and gradually increase to target rate over 24-48 hours
- Check gastric residual volumes for gastric feeds (hold if > 250-500 mL)
- Keep head of bed elevated 30-45 degrees during and 1 hour after feeding
- Flush tube with water before and after feedings and medications
- Monitor for signs of intolerance: nausea, vomiting, diarrhea, abdominal distension
- Check tube placement before each bolus feeding
- Maintain proper formula storage and handling to prevent contamination
- Regular monitoring of weight, hydration status, and laboratory values
Frequently Asked Questions
- How do I choose between continuous and bolus feeding?
- Continuous feeding is typically used for critically ill patients, those with feeding intolerance, or jejunal tubes. Bolus feeding is preferred for stable patients with gastric tubes who can tolerate larger volumes and want more mobility. Your healthcare team will determine the best method based on individual needs.
- Can I adjust the feeding rate?
- Feeding rates should only be adjusted under healthcare provider guidance. Rates typically start low and increase gradually based on tolerance. Never exceed recommended maximum rates, as this can cause complications like diarrhea, cramping, or aspiration.
- How much water should be given in addition to formula?
- Free water needs vary but typically 30 mL/kg body weight per day. This includes water for flushing (usually 30-60 mL before and after feeds, and with medications). Your healthcare provider will calculate specific water requirements based on formula choice and individual needs.
- What if the patient experiences diarrhea?
- Diarrhea can result from rapid administration, contaminated formula, medication side effects, or underlying conditions. Slow the rate, ensure proper formula handling, check medications, and consult your healthcare provider. Never stop tube feeding without medical guidance.
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