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Difficulty: MediumHuman Factors and Cognitive Biases

A 68-year-old man is admitted to the telemetry step-down unit for an acute exacerbation of chronic obstructive pulmonary disease. He is placed on continuous pulse oximetry and electrocardiographic monitoring. Over the first 12 hours of the shift, the central nursing station monitor emits over two dozen audible alerts indicating transient oxygen desaturations. Each time, the bedside nurse determines the patient was merely coughing or repositioning in bed, causing the sensor to temporarily lose its signal. During the early morning hours, the monitor alarms again for an oxygen saturation of 76%. Assuming this is another false alert caused by patient movement, the care team mutes the notification from the central desk and does not immediately enter the room. Thirty minutes later, the patient is found unresponsive with acute hypercapnic respiratory failure requiring emergent intubation. Which of the following human factors principles best describes the primary cause of the delayed intervention in this scenario?

  1. A
    Anchoring bias
  2. B
    Availability heuristic
  3. Alarm fatigueAnswer
  4. D
    Confirmation bias
  5. E
    Framing effect

Answer

Alarm fatigue is the human factors principle that best describes the primary cause of the delayed intervention, as the team became desensitized to the repeated false alerts.
Alarm fatigue occurs when healthcare providers are exposed to a high volume of technological alerts, the vast majority of which are clinically insignificant or false positives. This constant exposure leads to sensory overload and desensitization, causing providers to ignore, mute, or respond slowly to subsequent alarms. In this scenario, the repeated false desaturation alerts led the care team to incorrectly assume a genuinely critical alarm was another artifact, delaying necessary life-saving intervention.

Step-by-Step Solution

1
Analyze the clinical scenario to identify the root cause of the delayed intervention.
The care team ignored a critical low oxygen saturation alarm, resulting in respiratory failure.
To determine the specific systemic or cognitive error that occurred.
2
Evaluate the context surrounding the ignored alarm.
The team had been exposed to more than two dozen false alarms from the same monitor over the previous 12 hours.
Contextualizing the error helps differentiate between individual cognitive biases and systemic human factors.
3
Match the identified pattern to the correct human factors concept.
Desensitization to repeated, non-actionable technological alerts is defined as alarm fatigue.
Identifying the correct terminology fulfills the learning objective.

Key Concept

Systems-based Practice: Alarm fatigue in healthcare settings
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Topics

Human Factors and Cognitive Biases

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