Lesson overview
IV Medication Rate Change Calculations
Ready when you are
Start with short teaching slides, then answer the lesson questions. Your progress stays on this browser.
Learning outcomes
What you will learn
- Identify what changes and what stays the same when a medication-rate order changes.
- Calculate the prepared concentration and the medication rate represented by the supplied pre-change values.
- Calculate a new pump rate from a new medication-rate order when concentration is unchanged.
- Track calculated medication amounts and solution volumes in separate time periods before and after the change.
- Recognise that a new bag or changed concentration requires a fresh calculation rather than copying the old pump-rate ratio.
- Use a simple proportion check only when the concentration and any verified dosing weight stay the same.
Clinical connection
Why this matters
These questions become confusing when the old pump rate, new medication order, concentration and times are mixed together. Keeping BEFORE and AFTER separate makes it clear which numbers belong to which part of the calculation.
Quick concept
Keep each infusion state separate when a rate changes
A before-and-after rate-change problem contains at least two states. Keep the old values together, then calculate the authorised new state from its own target, concentration and dosing information. Do not mix a previous bag, concentration or rate with the new state.
Formula
new pump rate = authorised new dose rate ÷ current verified concentration
Worked example
Educational example: an authorised new target is 12 mg/hr and the current verified concentration is 0.5 mg/mL.
12 mg/hr ÷ 0.5 mg/mL = 24 mL/hr
Answer: 24 mL/hr for the stated practice values
This lesson practises arithmetic after a rate change has already been authorised. It does not decide whether an infusion should be titrated or what a patient-specific target should be.
Lesson plan
How the lesson works
- 1
Learn
Short teaching slides explain one idea at a time with plain-language examples.
- 2
Practise
Answer calculation or scenario questions and receive immediate feedback.
- 3
Finish
Complete the lesson check and save your learning progress on this browser.
Keep going
Learn, practise, apply and check this skill
Use the page that matches what you need next. Each resource has a different job, so the lesson can stay focused on teaching the skill.
Practise
IV medication rate-change quizzes
Practise keeping old and new infusion states separate.
Understand
Medication dose rate vs pump rate
Review the fixed dose-rate and pump-rate relationship before rate-change problems.
Check
IV calculators
Choose the calculator that matches the exact calculation inputs; no generic titration tool is provided.
Apply
Medication & IV Safety cases
Use infusion-state checking and medication maths in clinical scenarios.