Infusion Concentration and Dose Rate
Convert a dose-per-time prescription into a volume-per-time pump rate.
How to prepare for the NMC Nursing Associate CBT
Combine unit-safe calculation with newly qualified nursing associate judgement across all ages and settings, grounded in the Code, scope, person-centred care, teamwork and escalation.
Core concepts
Concept 1
First establish prepared concentration.
Exam cue: Separate dose rate from volume rate.
Concept 2
Weight may affect dose rate before concentration conversion.
Exam cue: Carry weight and time units explicitly.
Risk pitfalls and guardrails
Using total bag dose as per-mL concentration.
Guardrail: Do not choose a familiar task if it ignores deterioration, consent, scope, communication or follow-up.
Omitting time conversion.
Guardrail: Do not choose a familiar task if it ignores deterioration, consent, scope, communication or follow-up.
Memory anchors
What is prepared concentration?
Total drug amount ÷ total prepared volume.
How is volume rate found?
Required dose rate ÷ concentration.
When is weight used?
When the prescription is expressed per kilogram.
Why keep time units visible?
Per-minute and per-hour rates differ sixty-fold.
What closes the calculation?
Check concentration, pump rate and total delivered dose.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A solution contains 1 g in 500 mL. How many mL/hour deliver 40 mg/hour?
A pump syringe is prepared by diluting 500 mg to a total of 250 mL. The prescription requires 30 mg each hour. Which pump setting is needed?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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