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Difficulty: MediumRoot Cause Analysis and Error Investigation

A 32-year-old female at 38 weeks gestation is admitted to the labor and delivery unit for induction of labor. The attending physician orders an intravenous oxytocin infusion. A nurse retrieves a vial from the automated dispensing cabinet but inadvertently selects tranexamic acid instead of oxytocin. The vials for both medications are similar in size, have identical cap colors, and are stored in adjacent compartments in the cabinet. The patient is administered the tranexamic acid bolus and shortly thereafter experiences a generalized tonic-clonic seizure. She is immediately stabilized with intravenous benzodiazepines and supportive care. A hospital investigative committee is convened to review this sentinel event. Which of the following proposed responses represents the most effective systems-based intervention to prevent this specific error from recurring?

  1. Implementing barcode medication administration scanning that physically links the patient's wristband to the medication vial prior to administrationAnswer
  2. B
    Transitioning from a retrospective investigation to a prospective Failure Mode and Effects Analysis (FMEA) of the dispensing cabinet
  3. C
    Concluding the investigation after identifying the nurse's failure to read the vial label and initiating disciplinary action
  4. D
    Instituting a mandatory, standardized shift handoff protocol that requires oncoming nurses to verbally verify all high-alert medications
  5. E
    Focusing the committee's corrective action plan on training staff to overcome anchoring bias during medication administration

Answer

Implementing barcode medication administration scanning that physically links the patient's wristband to the medication vial prior to administration.
The correct answer identifies barcode medication administration (BCMA) as the most effective systems-based intervention. In the hierarchy of safety controls, interventions are ranked by their ability to reduce or eliminate human error. 'Forcing functions' and 'automation/computerization' (such as BCMA linked to the electronic health record) are considered the strongest and most reliable controls. They physically or systematically prevent a task from being completed incorrectly, thus halting an error before it reaches the patient. In this scenario, scanning the tranexamic acid vial would have immediately alerted the nurse with a hard stop that it did not match the ordered oxytocin, directly mitigating the latent risk of look-alike vials.

Step-by-Step Solution

1
Analyze the adverse event and identify the root causes.
The event was caused by an 'active error' (the nurse selecting the wrong vial) facilitated by multiple 'latent errors' (look-alike vials, identical cap colors, adjacent storage).
Understanding the interplay between latent system flaws and active human failures is required to formulate an effective action plan.
2
Evaluate the proposed interventions based on the hierarchy of safety controls.
Barcode scanning is identified as a forcing function/automation. FMEA is a prospective analytical tool, not a corrective action. Handoffs and retraining are administrative/educational controls.
The National Institute for Occupational Safety and Health (NIOSH) and the Institute for Safe Medication Practices (ISMP) rank interventions by their ability to reduce reliance on human vigilance.
3
Select the strongest systems-based intervention.
Barcode medication administration (BCMA) is the most effective intervention because it automatically halts the process if the scanned medication does not match the patient's electronic order.
Forcing functions physically or systematically prevent an error from reaching the patient, making them superior to policies, warnings, or training.

Key Concept

Hierarchy of Intervention Effectiveness in Root Cause Analysis
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Topics

Root Cause Analysis and Error Investigation

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