Hospital checklists are meant to save lives—so why do they often fail?

Before making the first incision, confirm the patient's identity. Mark the surgical site. Ask about allergies. Discuss any anticipated blood loss. Introduce yourself by name. These are some of the 19 tasks on the World Health Organization (WHO) Surgical Safety Checklist, a simple list of actions to be completed before an operation in order to cut errors and save lives. In 2007 and 2008, surgical staff at eight hospitals around the world tested the checklist in a pilot study. The results were remarkable. Complications such as infections after surgery fell by more than one-third, and death rates dropped by almost half. The WHO recommended that all hospitals adopt its checklist or something similar, and many did.