Cornell Dextrose Calculator

Cornell Dextrose Equation:

\[ GIR = \frac{\text{Infusion Rate (mL/hr)} \times \text{Dextrose Concentration (g/dL)} \times 1000 \text{ (mg/g)}}{\text{Weight (kg)} \times 60 \text{ (min/hr)} \times 100 \text{ (mL/dL)}} \]

Glucose Infusion Rate (GIR):

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1. What is the Cornell Dextrose Equation?

The Cornell Dextrose Equation calculates the Glucose Infusion Rate (GIR) from intravenous dextrose solutions. It's commonly used in neonatal and pediatric intensive care to monitor and adjust dextrose administration.

2. How Does the Calculator Work?

The calculator uses the Cornell Dextrose equation:

\[ GIR = \frac{\text{Infusion Rate} \times \text{Dextrose Concentration} \times 1000}{\text{Weight} \times 60 \times 100} \]

Where:

Infusion Rate — Dextrose solution infusion rate (mL/hr)
Dextrose Concentration — Percentage of dextrose in solution (g/dL)
Weight — Patient's weight in kilograms (kg)
1000 — Conversion factor (mg/g)
60 — Conversion factor (min/hr)
100 — Conversion factor (mL/dL)

Explanation: The equation converts the dextrose infusion into mg of dextrose per kg of body weight per minute.

3. Importance of GIR Calculation

Details: Accurate GIR calculation is crucial for maintaining appropriate glucose levels in patients receiving IV dextrose, especially in neonates and critically ill patients where glucose homeostasis is vital.

4. Using the Calculator

Tips: Enter the infusion rate in mL/hr, dextrose concentration in g/dL (e.g., for D10W enter 10), and patient weight in kg. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical GIR range for neonates?
A: Term neonates typically start at 4-6 mg/kg/min, while preterm neonates may start at 6-8 mg/kg/min, adjusted based on glucose monitoring.

Q2: How does this differ from TPN calculations?
A: This calculates only the dextrose component. TPN calculations are more complex, considering amino acids, lipids, and electrolytes.

Q3: Why is weight important in the calculation?
A: GIR is weight-dependent to ensure appropriate dosing per kilogram of body mass, especially important in pediatric patients.

Q4: Can this be used for adult patients?
A: While the calculation method is the same, GIR targets differ for adults, who typically require lower rates than neonates.

Q5: How often should GIR be recalculated?
A: GIR should be recalculated whenever infusion rates or concentrations change, or when significant weight changes occur.