Wrong site surgery is a sentinel event requiring a comprehensive investigation to prevent recurrence, focusing on systemic factors.

Option A (Securing the involved equipment): Securing equipment may be relevant for device failures, but wrong site surgery typically involves process errors.

Option B (Notifying the rapid response team): Rapid response teams address acute patient emergencies, not surgical errors post-event.

Option C (Re-training the involved individuals): Training may follow but is not the core of the review, which focuses on systemic issues.

Option D (Analyzing the underlying processes): This is the correct answer. The NAHQ CPHQ study guide states, “A thorough review of a wrong site surgery requires analyzing underlying processes, such as time-out procedures, via root cause analysis” (Domain 1).

CPHQ Objective Reference: Domain 1: Patient Safety, Objective 1.5, “Investigate sentinel events,” emphasizes process analysis. The NAHQ study guide notes, “Process analysis is critical for wrong site surgery reviews” (Domain 1).

Rationale: Analyzing processes via RCA ensures a credible review, as per CPHQ’s safety principles.