50 million surgical procedures are performed in the U.S. annually. Despite advances, preventable complications — wrong-site surgery, retained items, medication errors — still occur thousands of times per year. The WHO Surgical Safety Checklist, introduced in 2008, has proven transformative.
Three Phases
Sign In (Before Anesthesia)
- Patient confirms identity, surgical site, and procedure
- Informed consent documented; allergies confirmed
- Anesthesia safety check complete; blood loss risk assessed
Time Out (Before Incision)
- All team members introduce themselves by name and role
- Patient, procedure, and site confirmed verbally by ALL team members
- Antibiotic prophylaxis given within last 60 minutes
- Critical steps anticipated; imaging displayed
Sign Out (Before Leaving OR)
- Procedure performed confirmed; instrument counts correct
- Specimen labeling verified; recovery plan communicated
📋 Why It Works
- Standardizes communication under pressure
- Creates a mandatory pause before irreversible incisions
- Gives every team member — including nurses — explicit authority to speak up
- Catches equipment failures before harm occurs
The Evidence
NEJM (2009): Death rate fell 47%, major complication rate fell 36% across 8 international hospitals. Multiple meta-analyses have confirmed consistent benefit across tens of thousands of operations.
Ask Your Hospital
"Does this hospital use the WHO Surgical Safety Checklist?" A team that welcomes this question has a strong safety culture.