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Difficulty: MediumClassification of Medical Errors and Adverse Events

During the evening shift on a busy medical-surgical unit, a 68-year-old man is recovering from a severe asthma exacerbation. His electronic health record (EHR) contains a documented, high-severity allergy to nonsteroidal anti-inflammatory drugs (NSAIDs), which previously caused anaphylaxis. The hospital's central information technology department initiates an unannounced server update, which temporarily disables the EHR's clinical decision support and allergy cross-checking modules for 15 minutes. During this brief window, a cross-covering physician is distracted by an emergency code on another floor and accidentally orders ketorolac for the patient's mild headache, mistakenly selecting it from a generic order set instead of acetaminophen. The decentralized pharmacist, managing a backlog of orders during the system downtime, verifies the ketorolac without manually cross-referencing the patient's allergy tab. As the primary nurse prepares to administer the medication, she notices the patient's red allergy wristband, realizes ketorolac is an NSAID, and immediately withholds the dose.

In the context of the Swiss cheese model of accident causation, the unannounced server update disabling the clinical decision support modules is best classified as which of the following?

  1. Latent errorAnswer
  2. B
    Active error
  3. C
    Near miss
  4. D
    Sentinel event
  5. E
    Unpreventable adverse event

Answer

Latent error
The unannounced server update is best classified as a latent error. In the Swiss cheese model of accident causation, latent errors are system-level vulnerabilities, design flaws, or organizational failures at the 'blunt end' of healthcare delivery. These latent conditions (e.g., software downtime, understaffing, poor equipment design, inadequate protocols) do not typically cause immediate harm themselves but create a hazardous environment that facilitates active errors by frontline personnel. In this scenario, the deactivation of the clinical decision support system was a latent error that allowed the physician's and pharmacist's active errors to go unchecked until a final safety barrier (the nurse) intercepted them.

Step-by-Step Solution

1
Analyze the specific component of the incident requested in the question stem.
The question specifically asks to classify the 'unannounced server update disabling the clinical decision support modules', not the physician's action or the final outcome.
Focusing on the exact subject of the question prevents incorrectly classifying the entire event as a near miss.
2
Evaluate the nature of the server update within the Swiss cheese model.
The server update is a system-level flaw at the 'blunt end' of healthcare delivery that created a vulnerability, allowing subsequent human errors to propagate.
Identifying the hierarchical level of the failure (system vs. operator) is essential for accurate classification.
3
Match the identified system-level flaw to standard medical error terminology.
System-level vulnerabilities that facilitate errors are defined as latent errors.
This distinguishes it from active errors (human mistakes at the sharp end) or the final intercepted outcome of the event.

Key Concept

In the Swiss cheese model of accident causation, a latent error is a system-level vulnerability or design flaw at the 'blunt end' that creates conditions allowing active errors at the 'sharp end' to occur.
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Topics

Classification of Medical Errors and Adverse Events

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