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Zorluk: ZorClassification of Medical Errors and Adverse Events

A 52-year-old man presents to an urgent care clinic with progressive right calf swelling and pain. The physician strongly suspects a deep vein thrombosis (DVT) and performs a point-of-care D-dimer test, which returns positive. The facility's only ultrasound machine is currently undergoing unexpected maintenance. The physician decides to administer a stat dose of rivaroxaban and discharges the patient to home, instructing him to get a venous ultrasound at a neighboring imaging center the following morning. During this encounter, the physician fails to reconcile the patient's home medications, overlooking his chronic use of carbamazepine, a potent CYP3A4 inducer that significantly decreases rivaroxaban efficacy.

Six hours later, the patient is brought to the local emergency department with sudden, severe dyspnea and hypoxia, ultimately requiring systemic thrombolysis for a massive pulmonary embolism.

An institutional root cause analysis determines several factors led to this outcome: the failure to fully evaluate the leg pain, the overlooked pharmacokinetic interaction, the unsafe discharge plan, and the facility's complete lack of a contingency protocol for managing acute vascular risks during imaging equipment downtime.

Which of the following best categorizes the facility's lack of a contingency protocol?

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

Cevap

Latent error
The correct classification for the facility's lack of a contingency protocol is a latent error. In the Swiss Cheese model of medical errors, latent errors (or 'blunt-end' errors) are underlying systemic flaws involving policies, equipment design, staffing, or organizational management. These systemic vulnerabilities lay dormant until they align with active errors (sharp-end mistakes made by frontline clinicians) to cause patient harm. The absence of a standardized protocol for equipment downtime is an organizational failure that created a hazardous environment, setting the stage for the physician's unsafe clinical decisions.

Adım Adım Çözüm

1
Identify the specific component of the vignette that the question is asking to classify.
The question asks to categorize the 'facility's lack of a contingency protocol for managing acute vascular risks during imaging equipment downtime'.
Vignettes often describe multiple errors and outcomes; answering correctly requires focusing on the exact element queried.
2
Distinguish between systemic flaws (causes) and clinical outcomes (effects).
A protocol deficiency is a systemic flaw that sets up the environment for failure, whereas the pulmonary embolism is the resulting clinical outcome.
This rules out outcome-based classifications like 'Preventable adverse event' or 'Sentinel event'.
3
Differentiate between sharp-end human actions and blunt-end system vulnerabilities.
The physician's actions (prescribing, discharging) are active errors. The absence of organizational guidance (lack of protocol) is a latent error.
Latent errors are upstream organizational or design defects that allow active errors to cause patient harm.

Anahtar Kavram

Latent errors (blunt-end errors) are systemic vulnerabilities in healthcare design, organization, or standardized procedures that create conditions under which frontline active errors are more likely to occur.
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Classification of Medical Errors and Adverse Events

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