Dextrose Infusion Calculator

Glucose Infusion Rate (GIR) 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 (GIR)?

The Glucose Infusion Rate (GIR) calculates the rate at which dextrose is being administered to a patient, expressed in mg of dextrose per kg of body weight per minute. It's commonly used in neonatal and pediatric intensive care settings.

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 — IV fluid administration rate (mL/hr)
Dextrose Concentration — Percentage of dextrose in solution (g/dL)
Weight — Patient's body weight (kg)
1000 — Conversion factor (mg/g)
60 — Conversion factor (min/hr)
100 — Conversion factor (mL/dL)

Explanation: The equation converts the infusion parameters into a standardized rate of glucose administration per body weight.

3. Importance of GIR Calculation

Details: GIR helps clinicians ensure appropriate glucose delivery, especially in neonates where excessive or insufficient glucose administration can have serious consequences.

4. Using the Calculator

Tips: Enter the IV infusion rate in mL/hr, dextrose concentration in g/dL (e.g., 10 for D10W), 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: Common starting GIR is 4-6 mg/kg/min, adjusted based on blood glucose monitoring.

Q2: How does GIR differ from dextrose percentage?
A: GIR accounts for both concentration and infusion rate relative to patient weight, providing a more precise measure of glucose delivery.

Q3: When is GIR calculation most important?
A: Particularly critical in very low birth weight infants and patients requiring precise glucose control.

Q4: How often should GIR be recalculated?
A: Should be recalculated whenever infusion rates or concentrations are changed.

Q5: Can this be used for adult patients?
A: While the calculation works for any age, it's most commonly used in neonatal and pediatric settings.