Question

Difficulty: EasyClassification of Medical Errors and Adverse Events

A 54-year-old woman is evaluated in the emergency department for severe headache, photophobia, and nausea. She has a past medical history of poorly controlled asthma. The emergency physician evaluates the patient and decides to prescribe a nonselective beta-blocker for a suspected migraine abortive therapy. Before the medication is dispensed or administered, the clinical pharmacist alerts the physician that the medication is strongly contraindicated due to the patient's asthma history. The physician immediately cancels the order and prescribes a different, safe alternative agent. The patient experiences no harm and her headache improves. Which of the following best classifies this incident?

  1. A
    Sentinel event
  2. B
    Preventable adverse event
  3. Near missAnswer
  4. D
    Unpreventable adverse event
  5. E
    Latent error

Answer

Near miss
The correct classification is a near miss (also known as a close call). In patient safety taxonomy, a near miss occurs when an error is made but is caught and corrected before it reaches the patient, thereby resulting in no harm. In this vignette, the physician made an active error by prescribing a contraindicated beta-blocker to an asthmatic patient. However, the clinical pharmacist's intervention acted as a successful system defense. Because the drug was never administered, the patient suffered no adverse consequences, fulfilling the exact criteria for a near miss.

Step-by-Step Solution

1
Identify the nature of the error in the scenario.
The physician prescribed a contraindicated medication, which constitutes an active prescribing error.
Understanding the action taken is the first step in clinical event classification.
2
Determine if the error reached the patient and caused harm.
The pharmacist intercepted the order; the medication was never administered, and no harm occurred.
Patient outcome is the key distinguishing factor between adverse events and near misses.
3
Match the sequence of events to the correct patient safety definition.
An error that is intercepted before reaching the patient and causes no harm is classified as a near miss.
Accurate classification guides appropriate safety reporting and root cause analysis.

Key Concept

A near miss (close call) is defined as a medical error that had the potential to cause harm but was intercepted before it reached the patient.
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