Advanced Glucose Infusion Rate Form
Formula Used
Glucose Infusion Rate:
GIR = (Dextrose % × Flow Rate mL/hr) ÷ (6 × Weight kg)
The number 6 comes from converting grams per 100 mL into milligrams per minute.
Dextrose grams per day: (Dextrose % × mL/hr × 24) ÷ 100
Dextrose calories per day: Dextrose grams/day × 3.4
How to Use This Calculator
Enter the patient weight in kilograms. Add the dextrose concentration as a percentage. Enter the infusion rate in milliliters per hour. Add a second infusion if glucose is coming from another line. You may also enter a target GIR. The calculator will estimate the flow rate needed for that target.
Press the calculate button. The result appears above the form and below the header. Review the total GIR, daily glucose grams, calories, and fluid delivery. Use the CSV or PDF button to save a clear record.
Example Data Table
| Weight kg | Dextrose | Flow mL/hr | GIR mg/kg/min | g/day | Use Case |
|---|---|---|---|---|---|
| 3.0 | D10W | 10 | 5.56 | 24.00 | Neonatal maintenance review |
| 5.0 | D12.5W | 12 | 5.00 | 36.00 | Infant glucose support |
| 70.0 | D5W | 100 | 1.19 | 120.00 | Adult fluid estimate |
About Glucose Infusion Rate
Why GIR Matters
Glucose infusion rate is a weight-based measure of intravenous glucose delivery. It is commonly written as milligrams per kilogram per minute. The value helps clinicians compare glucose support across different patient sizes. A small patient can receive a high glucose load from a small flow. A larger patient may receive a lower glucose load from the same flow. This is why weight is central to the calculation.
What the Calculator Reviews
This calculator accepts dextrose strength, infusion flow, and body weight. It also allows a second infusion line. That helps when maintenance fluid and nutrition fluid both contain dextrose. The tool adds glucose from both lines. It then displays total GIR, grams per day, calories per day, and fluid per kilogram. These values are useful during prescription checks and nutrition reviews.
Using Target Calculations
A target GIR can be entered for planning. The calculator estimates the flow needed at a selected dextrose strength. It also estimates the dextrose percentage needed at the current total flow. These values are planning aids. They should not be used alone for final clinical decisions. Patient status, glucose checks, fluid limits, line access, and local policy matter.
Clinical Caution
GIR needs careful interpretation. Neonates, infants, children, and adults have different needs. Illness, stress, insulin use, and nutrition route can change tolerance. Very high values may increase the risk of hyperglycemia. Very low values may not meet nutrition goals. Always match the result with the actual order and monitoring plan.
Frequently Asked Questions
1. What does GIR mean?
GIR means glucose infusion rate. It shows how much glucose a patient receives per kilogram each minute through intravenous fluid or nutrition.
2. What units does this calculator use?
It uses weight in kilograms, flow in milliliters per hour, dextrose as percent strength, and GIR as milligrams per kilogram per minute.
3. Can I add more than one dextrose infusion?
Yes. Enter the main infusion first. Use the secondary fields for another glucose-containing fluid. The calculator adds both glucose sources.
4. What does D10W mean?
D10W means 10 grams of dextrose in every 100 milliliters of water. In the calculator, enter 10 as the dextrose percentage.
5. Does this calculator replace clinical judgment?
No. It is only a calculation aid. Always follow medical orders, local protocols, pharmacy review, and patient monitoring requirements.
6. Why is weight required?
GIR is weight-based. The same glucose flow can mean very different delivery levels for patients with different body weights.
7. What does the target GIR option do?
It estimates the flow needed to reach a chosen GIR. It also estimates the dextrose strength needed at the current total flow.
8. Can I download the result?
Yes. After calculation, use the CSV button for spreadsheet records or the PDF button for a simple printable summary.