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Difficulty: MediumClassification of Medical Errors and Adverse Events

A 30-year-old man undergoes an elective cholecystectomy. Postoperatively, the physician prescribes intravenous hydromorphone for pain control. The hospital's automated medication dispenser was recently restocked, but a pharmacy technician mistakenly placed vials of heparin into the hydromorphone compartment. Both vials have similarly colored caps and labels. The night-shift nurse, working a double shift due to staffing shortages, retrieves a vial from the hydromorphone compartment. The barcode scanner on the floor has been broken for two days, and the day-shift staff forgot to mention this during patient handoff. The nurse administers the medication without scanning it. The patient receives a large dose of heparin, subsequently develops a massive intra-abdominal hemorrhage, and requires emergency exploratory laparotomy.

Which of the following statements correctly classify the elements of this adverse event? (Select all that apply)

  1. The incorrect stocking of the automated dispenser and the unaddressed broken barcode scanner represent latent errors.Answer
  2. The direct administration of the incorrect medication to the patient by the bedside nurse represents an active error.Answer
  3. C
    A Failure Mode and Effects Analysis (FMEA) is the most appropriate system-based tool to investigate why this specific hemorrhage occurred.
  4. D
    The nurse's assumption that the vial contained hydromorphone because of its physical location is a classic example of the availability heuristic.
  5. E
    The failure of the day-shift staff to report the broken barcode scanner during shift change is strictly classified as a sentinel event.

Answer

The statements correctly identifying the stocking error and broken scanner as latent errors, and the administration of the drug as an active error, are correct.
The correct statements accurately identify the latent errors (the incorrect pharmacy stocking and the unaddressed broken barcode scanner) and the active error (the administration of the wrong medication). Latent errors are system-level vulnerabilities at the 'blunt end' of healthcare delivery, such as equipment failures, staffing shortages, or poor communication protocols. Active errors occur at the 'sharp end' of care and involve immediate acts by frontline personnel, such as a nurse administering the wrong medication without performing a manual verification when the scanner is broken. Both must align for an adverse event to reach the patient, as described by the Swiss Cheese Model.

Step-by-Step Solution

1
Review the clinical scenario to identify the sequence of events leading to patient harm.
A pharmacy stocking error, a communication failure during handoff, a broken scanner, and a failure to verify the medication manually culminated in a severe hemorrhage.
Understanding the timeline and isolating each contributing factor is necessary to categorize the events accurately.
2
Differentiate between active and latent errors in the sequence.
System vulnerabilities (broken scanner, stocking error, poor handoff) are identified as latent errors, while the immediate incorrect administration by the frontline provider is an active error.
This distinction is the core of medical error classification according to the Swiss Cheese Model of accident causation.
3
Evaluate the remaining statements regarding system investigation tools, cognitive biases, and sentinel events.
FMEA is prospective (making it incorrect for investigating a past event), the bias is not the availability heuristic, and a handoff omission is a latent error rather than the sentinel event itself.
Eliminating plausible distractors confirms the final correct selections.

Key Concept

Classification of medical errors distinguishes between latent errors (underlying system-level vulnerabilities at the 'blunt end') and active errors (immediate, unsafe acts by frontline personnel at the 'sharp end').
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Topics

Classification of Medical Errors and Adverse Events

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