Johns Hopkins gave nurses power to stop doctors, cutting ICU infections

Central line catheters, inserted directly into a major vein, are a routine but high-risk ICU procedure: a break in sterile technique at insertion can seed a bloodstream infection that is often fatal. By 2001, the correct insertion protocol — handwashing, full skin disinfection, sterile gown and drape, avoiding higher-infection-risk insertion sites, prompt removal once no longer needed — was already well established and known to every physician performing the procedure; the Centers for Disease Control had over 120 pages of guidance on it.

Dr. Peter Pronovost, an anesthesiologist and critical-care physician at Johns Hopkins, recognized the problem was not a knowledge gap — doctors already knew the protocol — but a compliance gap with no real-time check on it, since junior ICU nurses present at every insertion had no institutional standing to interrupt an attending physician mid-procedure even when they saw a step skipped.

Gave nurses a five-item checklist and explicit authority to halt any physician skipping a step, backed by administration, closing the compliance gap.

The checklist gave nurses a simple, objective standard to check against in the moment.

Explicit authority to stop any physician overcame the seniority barrier that prevented intervention.

Administrative backing ensured nurses could exercise that authority without fear of retaliation.

Addressing both the standard and its enforcement made compliance actually happen.

When experts skip known steps under pressure, don't retrain them; empower the real-time observer to halt the process.

The checklist drove the ICU's central-line bloodstream infection rate from roughly 11% down to zero within about a year, and Pronovost went on to scale the same checklist-plus-authority model statewide through the Michigan Keystone ICU Project, which cut central-line infections across more than 100 Michigan ICUs by roughly two-thirds and was credited with saving an estimated 1,500 lives and $200 million within its first 18 months.