What this case supports, and what depends on local policy

Use an event record that identifies, contains, assesses, documents, investigates, corrects, and verifies the response. Corrected-report and urgent critical-result duties follow their applicable routes; urgent notification does not wait for event investigation.

Escalate by what the event touches: patient-safety concern, privacy concern, device or reagent/manufacturer obligation, or a current regulatory or leadership threshold. Use the laboratory’s current route and criteria rather than a generic rule list.

Closure is conditional. When evidence supports a recurrence condition, implement systemic corrective action and retain effectiveness evidence. When the investigation finds no systemic cause, document that evidence and the reason no systemic corrective action is assigned.

Distinguish internal release from clinician reporting, state the affected count and time boundary, and make the closure route match the investigation evidence.