WHO's two-minute surgery checklist cut deaths and complications by a third

Surgery has become a routine part of modern care, yet complications after operations occur in up to 25% of patients and at least half of surgical harm is preventable. WHO convened world experts to define core safety standards, and surgeon Atul Gawande led the team that turned them into one tool.

A 19-item checklist the whole team reads aloud at three points — before anaesthesia, before incision, before the patient leaves — so no step rests on one memory

WHO distilled a broad safe-surgery standard into a 19-item checklist that takes under two minutes and is performed at three critical moments: before anaesthesia, before skin incision and before the patient leaves the operating room. The surgeon, anaesthetist and nurses pause together and verbally confirm every item — patient identity, allergies, antibiotic timing, instrument and sponge counts — instead of trusting anyone's memory.

In the pilot across eight hospitals in eight cities, inpatient complications fell from 11% to 7% and deaths from 1.5% to 0.8% among 7,688 patients, with equal gains in high- and lower-income settings. WHO says the checklist is now used by a majority of surgical providers worldwide, and its three-pause structure spread into other fields of medicine.

WHO's Second Global Patient Safety Challenge, 'Safe Surgery Saves Lives', started from a blunt assessment: an estimated 234 million operations happen worldwide every year, complications are common, and a large share of surgical harm is preventable. Working groups of international experts reviewed evidence and agreed on four areas where improvement was possible — infection prevention, safe anaesthesia, safe teams and measurement.

The resulting invention was deliberately unglamorous: a 19-item checklist that takes under two minutes, performed at three moments of every operation — before anaesthesia, before skin incision and before the patient leaves the operating room. At each pause the whole team stops and verbally confirms the items together. As lead author Gawande put it, 'the concept of using a brief but comprehensive checklist is surprisingly new to us in surgery. Not everyone on the operating teams were happy to try it. But the results were unprecedented.'

Between October 2007 and September 2008, eight hospitals in eight cities — Toronto, New Delhi, Amman, Auckland, Manila, Ifakara, London and Seattle — tested the checklist on 3,733 patients before and 3,955 after its introduction. The rate of death fell from 1.5% to 0.8% (P=0.003) and inpatient complications from 11.0% to 7.0% (P<0.001). The reductions were of equal magnitude in high- and lower-income sites.

It diagnosed memory and hierarchy as the failure points: most items were already done individually, but never verified together by the whole team, every time.

Three fixed pauses gave every team member a moment to speak, so a quiet nurse's observation could stop a mistake before the surgeon's authority overrode it.

A two-minute ritual was small enough to run in any operating room on earth, rich or poor — the pilot deliberately included Ifakara and Manila as well as Seattle and London.

Testing in eight hospitals first meant sceptical surgeons met evidence — a third fewer complications and deaths — rather than an argument about checklists.

When the knowledge exists but is not applied every time, the fix is a shared ritual: short, done aloud, as a team — so quality stops depending on memory or rank.

The checklist's results were published in the New England Journal of Medicine in January 2009, and WHO was already aiming to have 2,500 hospitals using the tool by the end of that year. The organisation later issued an implementation manual for adapting it locally, and reported that it is now used by a majority of surgical providers worldwide. Gawande's message was that the pattern was bigger than surgery: short, extremely simple checklists 'could become as essential in daily medicine as the stethoscope' — and they did, becoming the template for checklists in intensive care and childbirth.