Team and safety
WHO Surgical Safety Checklist: what to check at Sign In, Time Out and Sign Out
Understand the WHO checklist as three shared safety pauses, not a form to complete while the work continues.
During a final count, a needle was missing. Every explanation seemed possible, but only one fact mattered: the count did not match. The team stopped, the surgeon was informed and the appropriate search and imaging process followed. The needle was later found on the floor.
That event showed me the real purpose of the WHO Surgical Safety Checklist: it does not exist to reassure us that everything is fine. It makes us stop when something is not.
The checklist is not the sheet of paper
Sign In, Time Out and Sign Out are safety pauses placed before important transitions. Sign In occurs before induction of anaesthesia, Time Out before skin incision and Sign Out before the patient leaves the operating room.
The exact content and delivery should follow the checklist and procedure adopted by your organisation. The what is verification. The how is doing it together and aloud. The why is finding discrepancies while the team can still act.
The most important phrase is “that does not match”
The value of the checklist is not a completed form. It is that someone can clearly say:
- “The count is incorrect.”
- “I did not hear the side confirmed.”
- “We are missing information.”
- “I would like to check that again.”
A checklist works only when the team pauses, listens and shares essential information: patient identity, procedure, site, anticipated concerns, required prophylaxis, equipment, specimens and count results.
It does not automatically eliminate errors. It creates the space to recognise together that something is wrong before moving on.
A different mindset for newcomers
When you are new, stopping the room may feel like obstructing it. The pause is designed precisely to interrupt automatic behaviour. You do not need a dramatic speech. You need to state the information that does not align.
Authority lies in precision and in the team’s response, not in volume.
See the complete picture
Each check may look small on its own: the patient’s name, procedure, site, anaesthetic concerns, antibiotic prophylaxis when required, equipment, specimens and counts. Together, they form a shared picture of the patient’s journey.
At the next Time Out, watch the whole team. Do people stop other tasks? Are answers clear? Can someone raise a doubt without being ignored? Is there genuine room to say “that does not match”?
A checklist works when it brings the team to see the same patient, the same procedure and the same risks.
The checklist makes a discrepancy visible; closed-loop communication ensures it reaches the right person. Continue with Closed-loop communication in the operating room.