Cornell Glucose Infusion Rate Calculator

Glucose Infusion Rate Formula:

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

Glucose Infusion Rate (GIR):

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1. What is Glucose Infusion Rate?

The Glucose Infusion Rate (GIR) calculates the rate at which glucose is being administered to a patient, expressed in mg/kg/min. It's commonly used in neonatal and pediatric intensive care to monitor glucose administration.

2. How Does the Calculator Work?

The calculator uses the GIR formula:

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

Where:

Infusion Rate — Fluid administration rate (mL/hr)
Dextrose Concentration — Glucose concentration in the solution (g/dL)
Weight — Patient's weight in kilograms (kg)
1000 — Conversion factor (mg/g)
60 — Minutes per hour (min/hr)
100 — Milliliters per deciliter (mL/dL)

Explanation: The equation converts the infusion parameters into a standardized glucose administration rate based on patient weight.

3. Importance of GIR Calculation

Details: Accurate GIR calculation is crucial for maintaining appropriate glucose levels, especially in critically ill patients, neonates, and those receiving parenteral nutrition.

4. Using the Calculator

Tips: Enter the infusion rate in mL/hr, dextrose concentration in g/dL, 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: Typically 4-8 mg/kg/min for stable neonates, but may vary based on clinical condition and gestational age.

Q2: How does GIR relate to blood glucose levels?
A: Higher GIR generally leads to higher blood glucose levels, but individual responses vary based on insulin sensitivity and metabolic state.

Q3: When is GIR monitoring most important?
A: Particularly important in very low birth weight infants, patients with glucose instability, or those receiving high-dextrose solutions.

Q4: Are there limitations to GIR calculation?
A: Doesn't account for endogenous glucose production or utilization. Clinical correlation with blood glucose measurements is essential.

Q5: How often should GIR be recalculated?
A: Should be recalculated whenever infusion parameters change or the patient's weight changes significantly.