1. What is IV Dosage Calculation?

Definition: This calculator determines the intravenous (IV) flow rate in milliliters per hour (mL/h) based on the total volume to be infused and the time period.

Purpose: It helps medical professionals accurately administer IV fluids and medications over specified time periods.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_{mL} \) — Flow rate (milliliters per hour)
• \( V_d \) — Volume to be infused (milliliters)
• \( t \) — Time for infusion (hours)

Explanation: The total volume is divided by the infusion time to determine the appropriate flow rate for the IV pump.

3. Importance of Accurate IV Calculations

Details: Proper IV flow rate calculation ensures patients receive medications and fluids at the correct rate, preventing complications from too rapid or too slow administration.

4. Using the Calculator

Tips: Enter the total volume to be infused in mL and the time period in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What if my time is in minutes instead of hours?
A: Convert minutes to hours by dividing by 60 (e.g., 30 minutes = 0.5 hours).

Q2: How do I calculate drops per minute (gtt/min)?
A: Multiply mL/h by the drop factor (gtt/mL) and divide by 60. Different IV sets have different drop factors (typically 10, 15, or 20 gtt/mL).

Q3: What's a typical flow rate for maintenance IV fluids?
A: Common rates range from 50-150 mL/h for adults, but always follow specific orders for each patient.

Q4: How do I calculate infusion time if I know the flow rate?
A: Use the formula \( t = \frac{V_d}{Q_{mL}} \) (time = volume ÷ flow rate).

Q5: What safety checks should I perform?
A: Always double-check calculations, verify the ordered rate, and use a pump when precise control is needed.