Feeding Pump Rate Calculator
Calculate the precise ml/hr delivery rate for enteral nutrition pumps.
Calculated Delivery Rate
How to Calculate Feeding Pump Rate
Calculating the flow rate for an enteral feeding pump is a critical task for healthcare providers, caregivers, and patients receiving tube feeding. The goal is to ensure the body receives the required volume of nutrition over a specific period without causing gastric distress.
The standard formula used by most clinical feeding pumps (like Kangaroo or Zevex) is based on milliliters per hour (ml/hr). Unlike gravity sets which might use drops per minute, electronic pumps require a specific digital input of volume over time.
The Feeding Pump Rate Formula
To find the rate manually, use the following calculation:
Step-by-Step Calculation Example
Imagine a patient is prescribed 1,500 ml of formula to be delivered over a 24-hour period. To find the pump setting:
- Step 1: Identify Total Volume = 1,500 ml
- Step 2: Identify Total Time = 24 hours
- Step 3: Divide 1,500 by 24
- Result: 62.5 ml/hr
Continuous vs. Cyclic Feeding
The calculation changes slightly depending on the feeding schedule:
- Continuous Feeding: The formula is typically delivered over 24 hours. This provides the slowest, most consistent rate for those with sensitive digestion.
- Cyclic Feeding: The formula is delivered faster over a shorter window (e.g., 8 to 12 hours), often overnight. This allows the patient more mobility during the day.
- Bolus Feeding: This usually involves manual delivery or a very high pump rate over a short burst (e.g., 250ml over 20 minutes), mimicking standard meal times.
Common Caloric Densities
When calculating the rate, clinicians also look at the "caloric density" of the formula to ensure the patient meets their daily energy needs. Common densities include:
- 1.0 kcal/ml: Standard formula.
- 1.2 kcal/ml: Concentrated formula for fluid restriction.
- 1.5 – 2.0 kcal/ml: High-calorie formulas for increased metabolic needs.
Safety Considerations
Always prime the tubing before starting the pump to ensure no air is delivered into the stomach. Additionally, ensure the patient is positioned at a 30-45 degree angle (Fowler's position) during feeding and for at least 30-60 minutes afterward to prevent aspiration. If the pump alarms for an "occlusion," check the tubing for kinks or clogs before restarting at the calculated rate.