1. What is Flow Rate 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 infusion time.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (mL/h)
• \( V_d \) — Volume to be infused (mL)
• \( t \) — Time for infusion (hours)

Explanation: The total volume is divided by the infusion time to determine the rate at which the IV should be administered.

3. Importance of Accurate Flow Rate Calculation

Details: Proper flow rate calculation ensures patients receive medications at the correct dosage, prevents fluid overload, and maintains therapeutic effectiveness.

4. Using the Calculator

Tips: Enter the total volume in milliliters and the infusion time in hours. Both values must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What if my infusion time is in minutes?
A: Convert minutes to hours by dividing by 60 before entering the value (e.g., 30 minutes = 0.5 hours).

Q2: How do I calculate drops per minute (gtt/min)?
A: First calculate mL/h, then multiply by the drop factor (gtt/mL) and divide by 60.

Q3: What's a typical flow rate for maintenance IV fluids?
A: Standard maintenance rates are often 50-100 mL/h for adults, but always follow specific orders.

Q4: When would I need a more precise calculation?
A: For critical medications like vasopressors or pediatric doses where small errors can have significant effects.

Q5: Does this account for IV tubing dead space?
A: No, this calculates the theoretical flow rate. In practice, you may need to account for priming volume.