Glucose Infusion Rate Calculator Cornell Lab

Glucose Infusion Rate (GIR) 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 Glucose Infusion Rate (GIR)?

The Glucose Infusion Rate (GIR) measures how much glucose is being administered to a patient per unit of body weight per minute. 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 equation:

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

Where:

Infusion Rate — Fluid administration rate (mL/hr)
Dextrose Concentration — Dextrose percentage (g/dL)
1000 — Conversion factor (mg/g)
Weight — Patient weight (kg)
60 — Minutes per hour conversion
100 — Conversion from dL to mL

Explanation: The equation converts the total glucose being infused (in mg) to a weight-normalized rate (mg/kg/min).

3. Importance of GIR Calculation

Details: GIR calculation is crucial for maintaining appropriate glucose levels in patients receiving intravenous dextrose, especially in neonates and critically ill patients where precise glucose control is essential.

4. Using the Calculator

Tips: Enter the infusion rate in mL/hr, dextrose concentration in g/dL (e.g., 10% dextrose = 10 g/dL), and 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, though this may vary based on clinical status and gestational age.

Q2: How do I convert percentage to g/dL for dextrose solutions?
A: Simply use the percentage value (e.g., 5% dextrose = 5 g/dL, 10% = 10 g/dL).

Q3: Why is GIR important in TPN management?
A: GIR helps prevent both hyperglycemia and hypoglycemia when administering parenteral nutrition.

Q4: Does this calculation apply to oral glucose?
A: No, this calculation is specifically for intravenous glucose administration.

Q5: How often should GIR be monitored?
A: Frequency depends on clinical status, but typically with each change in infusion rate or dextrose concentration.