WHO Surgical Safety Checklist
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Direct answer
Roughly twenty checks and three deliberate pauses make up the WHO Surgical Safety Checklist, introduced in 2008 under the Safe Surgery Saves Lives campaign: Sign In before induction (identity, procedure, site and consent, site marking, machine and pulse oximeter checks, allergies, airway and blood-loss risk), Time Out before incision (team introductions, patient-site-procedure confirmation aloud, antibiotic given within the last 60 minutes, anticipated critical events reviewed), and Sign Out before the patient leaves (procedure name recorded, counts complete, specimens labelled, equipment concerns and recovery plans). In the original eight-hospital WHO pilot, complications fell from about 11% to 7% and mortality from 1.5% to 0.8% — the numbers behind its adoption into NABH accreditation standards in India and routine practice ever since.
What you must remember
- Three phases, three pauses: Sign In (before induction), Time Out (before skin incision), Sign Out (before the patient leaves the theatre) — each a full stop in activity, not paperwork in parallel.
- Sign In items: patient identity, site, procedure and consent; surgical site marked; anaesthesia machine checked; pulse oximeter functioning; allergies declared; difficult airway and aspiration risk assessed; expected blood loss reviewed.
- Time Out items: all activity stops; team members introduce themselves by name and role; patient, site and procedure confirmed aloud; antibiotic prophylaxis confirmed within the last 60 minutes; anticipated critical events reviewed by surgeon, anaesthetist and nurse together; imaging displayed.
- Sign Out items: the procedure actually performed recorded; instrument, swab and needle counts confirmed correct; specimens labelled with patient identity read aloud; equipment problems noted; key concerns for postoperative care stated.
- The antibiotic rule: prophylaxis given within 60 minutes before incision — the single most-audited line on the list.
- Evidence: the 2009 multicentre WHO pilot reported complications falling from about 11% to 7% and death from about 1.5% to 0.8% with checklist implementation.
- Indian practice: NABH accreditation standards require a surgical safety checklist with documented compliance; the tool is adapted from the WHO version into hospital formats.
- Ownership: a team instrument — commonly coordinated by the circulating nurse — spoken aloud, item by item, never filled in silence afterwards.
Running the checklist on a real list, three times a patient
The first patient arrives; Sign In runs before induction. Identity asked open-ended against the wristband and consent, site marking shown, allergies spoken, machine checked and oximeter on, airway and blood-loss questions answered. For later patients the trap is rhythm — teams drift into reciting Sign In while the previous Sign Out is unfinished; the coordinator lets one loop close before the next opens.
Time Out is theatre's pre-flight check: everything stops, instruments down, names stated, patient-site-procedure confirmed. The antibiotic line is answered with drug and clock time, not "given"; imaging on screen; critical events named by each discipline. Sign Out is where counts are declared correct — or the count-not-correct pathway runs before anyone leaves. Specimens are labelled with the name read aloud against the notes. The coordinator ticks each item as spoken; the completed record accompanies the patient to recovery — in NABH surveys, that document is the checklist's proof of life.
Where students slip
The failures examiners describe are behavioural and item-specific. "We do the checklist" without the three named phases earns nothing: the marks sit on Sign In, Time Out and Sign Out with their anchor moments (before induction, before incision, before leaving theatre). The antibiotic item is misquoted as "in the theatre" — the standard is within 60 minutes before incision, and the answer includes the clock. Candidates invert the counting logic: counts are performed and declared at Sign Out, and a discrepancy is an event that halts closure and triggers search or imaging, not a footnote. The evidence gets garbled too — the pilot's figures belong to the 2009 multicentre study, and invented numbers are worse than none. Finally, "who leads it?" has a real answer — a named coordinator, commonly the circulating nurse — because a checklist without an owner is a poster.
Frequently asked questions
What are the three phases of the WHO Surgical Safety Checklist?
Sign In before induction, Time Out before skin incision, and Sign Out before the patient leaves the operating theatre.
What must be confirmed at Time Out?
That all activity has stopped, the team has introduced itself, patient-site-procedure are confirmed aloud, antibiotic prophylaxis was given within 60 minutes, critical events are anticipated, and imaging is displayed.
Within what window is surgical antibiotic prophylaxis given?
Within 60 minutes before incision, so tissue levels are therapeutic at the moment of cutting — the checklist's most-audited line.
What results did the original WHO pilot study report?
In the multicentre pilot, complication rates fell from about 11% to 7% and mortality from about 1.5% to 0.8% after checklist implementation.
What happens if the instrument count is incorrect at Sign Out?
The count is declared incorrect, closure pauses, and a search — wound, room, linens, imaging as indicated — proceeds until resolved or documented.