Prescribing IV Maintenance Fluids for a 70 kg Man Nil by Mouth
A timed 10-minute prescription writing OSCE station with reading time, a warning bell and an examiner-style weighted checklist including critical items, marked the way a real examiner would mark it.
Prescription writing10 min12 checklist items
- Station type
- Prescription writing
- Time
- 10 minutes, after 60s reading
- Total marks
- 16
- Critical items
- 3 (missing one fails the station)
Candidate instructions
You are a junior doctor in a surgical ward. A 70 kg man is due for surgery and is nil by mouth. He is otherwise well with normal renal function. He requires intravenous maintenance fluids for the next 24 hours. Write a prescription for his maintenance fluids. You have 10 minutes. You will be assessed on your ability to calculate fluid, electrolyte and glucose requirements and prescribe appropriately.
How the station runs
- 60 seconds of reading time with the instructions above, and nothing else.
- 10 minutes on the clock, with a warning bell before the end.
- The examiner's checklist, 12 weighted items worth 16 marks, revealed only when the station ends.
- Your score, with a critical-fail flag if a safety-critical item was missed.
The checklist stays hidden until the station is over, exactly as it would outside the exam room.
Log in to run "Prescribing IV Maintenance Fluids for a 70 kg Man Nil by Mouth"
A free account starts the clock: reading time, the station itself with a warning bell, then the examiner's checklist and your score.
Taught in
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Educational content for students and clinicians in training. It does not replace professional judgement, local protocols or current prescribing information.