Error in medicine is common and can lead to significant patient injury. Alt
hough successful systematic efforts to reduce human error have been applied
in other complex systems, the field of medicine has just begun to make a b
road-based effort in this regard. However, both research in and implementat
ion of patient safety measures may not occur without considering important
legal issues that may impede these health policy efforts. Tort and contract
law may interact with the vagaries of managed care to limit participation
in these error reduction efforts by health care providers as well as by man
aged care organizations. Thus, for patient safety research to be successful
, all members of the health care enterprise must participate in a coordinat
ed effort to identify and establish effective practices that may reduce hum
an error in medicine. But beyond this understanding, it is imperative that
legal impediments be recognized and addressed before the goal of a continuo
usly improving, increasingly safe health care system can become a reality.