GIR Calculator
Calculate Glucose Infusion Rate for parenteral dextrose administration in infants
Calculate Glucose Infusion Rate
Patient weight in kilograms (typically 0.5-20 kg for neonates/infants)
Dextrose Infusion 1
Common: 5%, 10%, 12.5%, 15%, 20%
IV infusion rate in mL per hour
Glucose Infusion Rate Results
Example Calculation
Preterm Infant Example
Patient: 2 kg preterm infant
Infusion 1: 5% dextrose at 15 mL/hr
Infusion 2: 10% dextrose at 10 mL/hr
Step-by-Step Calculation
GIR₁: (15 × 5 × 1000) ÷ (2 × 60 × 100) = 75,000 ÷ 12,000 = 6.25 mg/kg/min
GIR₂: (10 × 10 × 1000) ÷ (2 × 60 × 100) = 100,000 ÷ 12,000 = 8.33 mg/kg/min
Total GIR: 6.25 + 8.33 = 14.58 mg/kg/min
Assessment: Elevated but may be acceptable for preterm infant needs
GIR Guidelines
Term Infants
Initial range: 4-6 mg/kg/min
Preterm Infants
Initial range: 5-8 mg/kg/min
Safety Limits
<4 mg/kg/min: Risk of hypoglycemia
>18-20 mg/kg/min: Risk of lipogenesis
Clinical Monitoring
Monitor blood glucose every 4-6 hours
Target glucose: 70-100 mg/dL (3.9-5.6 mmol/L)
Adjust GIR based on glucose trends
Watch for signs of fluid overload
Monitor liver function with high GIR
Common Dextrose Concentrations
Understanding Glucose Infusion Rate (GIR)
What is GIR?
The Glucose Infusion Rate (GIR) measures how quickly a patient receives glucose from intravenous dextrose solutions. It's expressed in milligrams of glucose per kilogram of body weight per minute (mg/kg/min).
Why is GIR Important?
- •Prevents hypoglycemia in neonates and infants
- •Ensures adequate glucose for brain metabolism
- •Monitors parenteral nutrition safety
- •Prevents complications from excessive glucose
GIR Formula
GIR = (IV rate × Dext Conc × 1000) ÷ (weight × 60 × 100)
Where: IV rate (mL/hr), Dext Conc (%), weight (kg)
Clinical Considerations
- •Start conservatively and titrate based on glucose levels
- •Consider patient's gestational age and clinical condition
- •Monitor for signs of glucose intolerance
- •Adjust based on feeding tolerance and growth
Important Medical Disclaimer
This calculator is for educational and informational purposes only. It should not replace clinical judgment or professional medical advice. Always consult with qualified healthcare professionals for patient care decisions. Glucose administration requires careful monitoring and should only be managed by trained medical personnel in appropriate clinical settings.