01
Identify it
Foundation
Recognise the lesson’s key idea, the values that belong in the calculation and the unit the answer needs.
10 questions drawn from 24
One lesson · four quiz levels
mcg/kg/min Practice Questions: Weight-Based Infusions
Practise converting a weight-based dose rate in mcg/kg/min into a pump rate in mL/hr, then reverse-checking from mL/hr back to dose rate. Questions build from direct calculations into concentration changes, dosing-weight checks and mixed infusion states.
Weight-based infusion calculation practice
Quick review before you start
Multiply mcg/kg/min by the authorised dosing weight to get mcg/min, multiply by 60 to get mcg/hr, then divide by the exact current concentration in mcg/mL to calculate mL/hr.
Formula
mL/hr = (mcg/kg/min × kg × 60) ÷ concentration (mcg/mL)
The dosing weight and concentration must belong to the same authorised infusion state. Do not mix values from different bags, orders or preparation states.
Sample question
A practice dose rate is 5 mcg/kg/min for 70 kg. The verified concentration is 1000 mcg/mL. What pump rate do those values represent?
(5 × 70 × 60) ÷ 1000 = 21 mL/hr
Answer: 21 mL/hr
What these questions practise
- mcg/kg/min × kg to find micrograms per minute
- the ×60 conversion from minutes to hours
- converting a verified infusion concentration into mcg/mL
- forward mcg/kg/min to mL/hr and reverse-check calculations
- keeping dosing weight, concentration and pump rate from the same infusion state
Learn the skillWork through mcg/kg/min to mL/hr infusion calculations step by step.Read the formula guideReview dose rate, dosing weight, concentration, ×60 and reverse checks.Use the calculatorCalculate a pump rate when the authorised dose, dosing weight and concentration are known.Apply it clinicallyUse weight-based infusion maths inside medication and IV safety cases.
Choose how you want to work
Guided practiceHints are available. Check each answer and see feedback before moving on.
Test yourselfNo hints or correctness feedback while you work. Submit the full set to see results.
02
Calculate it
Beginner
Use clearly stated orders and supplied information to complete straightforward calculations.
10 questions drawn from 24
03
Interpret it
Intermediate
Handle frequency, totals, conversions, order changes and realistic but relevant detail.
10 questions drawn from 24
04
Reason through it
Advanced
Reason through dense ward stories, changed orders, competing numbers and multi-part calculation chains.
10 questions drawn from 24
What the learning states mean
Learned means the lesson is complete. Practised means you have attempted questions. Secure requires a strong unassisted run. Mastered requires strong evidence again after time has passed. Review due means a previously stronger skill is ready for retrieval again.
These are MedMaths study states only. They do not certify clinical competence.