Module 5 - IV Flow Rate Calculations¶
Overview¶
Intravenous (IV) therapy delivers fluids, electrolytes, and medications directly into the bloodstream. Find both the volume and drip rate for IV administration .
This module builds directly on the unit cancellation method from Module 3 and the dosage calculation skills from Module 4.
What you'll learn¶
By the end of this module you should be able to:
- Calculate IV flow rates in mL/hr for pump programming
- Calculate infusion time for a given volume and rate
- Calculate drip rates in drops per minute (gtt/min) for gravity infusions
- Calculate flow rates for continuous IV medication infusions
- Verify doses from running infusion rates
- Identify and respond to unreasonable pump settings
Topics¶
| Topic | Key Skills |
|---|---|
| IV Flow Rates | mL/hr calculations, time conversion, pump programming |
| Infusion Time | Duration, completion time, rate adjustments |
| Drip Rates | gtt/min, drop factors, microdrip shortcut |
| IV Medications | Concentration, dose rates, weight-based infusions |
Estimated Time¶
Approximately 2-2.5 hours including practice problems.
Clinical Relevance¶
IV Errors Are Immediately Dangerous
Unlike oral medications which are absorbed gradually, IV medications enter the bloodstream instantly. There is no opportunity to reverse an error once an infusion has begun.
Always double check IV calculations. Always verify pump settings. Always know the signs of IV complications — infiltration, phlebitis, and extravasation.
Equipment You Will Use
| Equipment | Purpose |
|---|---|
| IV infusion pump | Precise rate control in mL/hr |
| Macrodrip set (10-20 gtt/mL) | Standard gravity infusions |
| Microdrip set (60 gtt/mL) | Precise low-volume infusions |
| Burette | Pediatric and critical care dosing |
Before You Begin
Make sure you are comfortable with unit cancellation from Module 3. Every calculation in this module is a unit cancellation chain — time, volume, concentration, and rate all need to cancel cleanly to the unit you want.
If any setup feels unclear, return to Unit Cancellation before continuing.