Responding to a high-alert medication error — communication and systems OSCE

Station brief (8–10 minutes)

You have two tasks. First, explain to the parents what happened to their child, in plain language and with open disclosure. Second, outline to the examiner the system changes you would implement to prevent recurrence. Address the decimal-point mechanism honestly, the immediate care already given, the follow-up planned, and the layered prevention. Do not invent jurisdiction-specific statutory thresholds. [6]

Tasks for the candidate

1. Disclose the error to the parents honestly, naming what happened, the immediate harm and the care given, and the plan for monitoring. [6]
2. Explain the mechanism of the tenfold error and the decimal-discipline rules that prevent it. [6]
3. Describe the layered system changes — decision-supported prescribing, unit-based pharmacists, standard concentrations, and an independent double-check for opioids — and justify why a single intervention is insufficient. [8] [1]
4. Arrange appropriate follow-up and a safety-net for the child, and describe how the event will be reported and reviewed. [6]

Expected performance

Must hit. Names the error and the decimal-point mechanism without minimising it; states that the child is now stable and was given naloxone; describes the follow-up and observation window; gives the decimal-discipline rules (5 not 5.0, 0.5 not .5); lists the layered prevention with an independent double-check for the opioid; commits to incident reporting and root-cause review; offers a clear safety-net and point of contact. [6] [8]

Merit. Acknowledges the family's distress without defensiveness; uses teach-back to confirm understanding; explicitly states that most errors reflect system weakness rather than individual blame; distinguishes error rate from actual patient harm when discussing prevention; and proposes measuring both after the change. [8] [1]

Fail. Minimises or conceals the error; blames an individual nurse without addressing the system; offers a single intervention as sufficient; fails to describe the opioid as a high-alert medicine requiring an independent check; gives no follow-up, no reporting, and no safety-net. [6]

Sample candidate structure

"Thank you both for coming in. I want to be honest with you about what happened. Your child was prescribed morphine for pain, but the dose was written with a trailing zero that was misread, and so two doses were ten times larger than intended. Your child became more drowsy than expected, we recognised it quickly, stopped the medicine, and gave a medicine called naloxone that reverses the morphine, and your child is now stable and being watched closely. I am very sorry this happened, and I want to tell you what we are doing so it does not happen again — to your child or to any other." [6]

"The rule that was broken is simple: we never write a trailing zero after a whole number, because 5.0 can be misread as 50. Beyond that, we are putting in place several layers of protection rather than relying on one: the prescription will show the calculation, a pharmacist will check it on the ward, the morphine will be in a standard concentration, and a second nurse will independently re-calculate and check it before it is given. Errors like this are more often a sign of a fragile system than of one person, and our job is to fix the system." [8] [1]

"For your child, we will keep watching for the next several hours because morphine can wear off and then re-sedate, we will re-check things as needed, and you can call the bell or ask for me or the nurse in charge at any time. I will also record exactly what happened so our team can review it and make a permanent change. Is there anything you want me to go over again, or any question I have not answered?" [6]