Bristol Royal Infirmary

Between 1984 and 1995, the pediatric cardiac surgery program at the Bristol Royal Infirmary performed arterial switch and other complex operations on infants and young children at a mortality rate roughly double the national average. The disparity persisted across more than a decade. The data existed. Individual clinicians noticed. An anesthesiologist raised concerns internally. A pathologist identified patterns in post-mortem examinations. A nurse kept a private tally. None of these weak signals penetrated the organizational sensemaking. The mortality rate was explained through frameworks that preserved the prevailing interpretation: the cases were unusually complex, the patients were unusually sick, the referral patterns produced higher baseline risk. Each explanation was plausible. Each was consistent with some evidence. And each foreclosed the interpretation the evidence, taken as a whole, most strongly supported: the program was performing below acceptable standards and children were dying as a result. The subsequent Kennedy Inquiry made Bristol a landmark case in healthcare safety, and Weick and Sutcliffe made it the paradigmatic example of organizational mindlessness — the failure to extract