Glucose Infusion Rate Neonate Calculator

Precise intravenous dextrose calculation for neonatal care

Calculation Results

GIR: 0.00 mg/kg/min

Total Daily Fluid: 0.0 mL/kg/day

Please enter valid positive numbers for all fields.

function calculateGIR() { var weight = parseFloat(document.getElementById('neonateWeight').value); var dextrose = parseFloat(document.getElementById('dextroseConc').value); var rate = parseFloat(document.getElementById('fluidRate').value); var errorDiv = document.getElementById('errorMsg'); var resultDiv = document.getElementById('girResultWrapper'); if (isNaN(weight) || isNaN(dextrose) || isNaN(rate) || weight <= 0 || dextrose < 0 || rate < 0) { errorDiv.style.display = 'block'; resultDiv.style.display = 'none'; return; } errorDiv.style.display = 'none'; // GIR Formula: (IV Rate in mL/hr * Dextrose Concentration * 0.1667) / Weight in kg // Mathematical proof: (Rate * Dextrose * 10) / (Weight * 60) var gir = (rate * dextrose * 10) / (weight * 60); // Total Daily Fluid: (Rate * 24) / Weight var totalFluid = (rate * 24) / weight; document.getElementById('girValue').innerText = gir.toFixed(2); document.getElementById('dailyFluid').innerText = totalFluid.toFixed(1); resultDiv.style.display = 'block'; }

Understanding Glucose Infusion Rate (GIR)

The Glucose Infusion Rate (GIR) is a critical metric in neonatal medicine used to measure the amount of glucose (dextrose) a newborn receives intravenously per minute per kilogram of body weight. This is particularly vital for preterm infants and neonates with hypoglycemia or metabolic distress.

The GIR Calculation Formula

The standard formula used by this calculator is:

GIR (mg/kg/min) = [Rate (mL/hr) × Dextrose % × 10] / [Weight (kg) × 60]

Standard GIR Ranges for Neonates

• Normal Maintenance: 4–8 mg/kg/min
• Preterm Infants: Often require 6–10 mg/kg/min to maintain euglycemia.
• Hyperinsulinism: May require GIR values exceeding 12–15 mg/kg/min.

Practical Example

If a neonate weighs 2.0 kg and is receiving D10W (10% Dextrose) at a rate of 8 mL/hr:

• Dextrose delivered per hour: 8 mL/hr × 0.10 g/mL = 0.8 g/hr
• Convert to mg: 0.8 g = 800 mg/hr
• Divide by 60 mins: 800 / 60 = 13.33 mg/min
• Divide by Weight: 13.33 / 2.0 kg = 6.67 mg/kg/min

Medical Disclaimer: This tool is for educational purposes only. Always verify calculations manually before clinical application. GIR requirements vary based on clinical condition, gestational age, and metabolic status.