The purpose of this study was to describe the extent to which nurses perceive the ethical dimensions of clinical practice situations involving patients, families and health care professionals. Using the composite theory of basic moral principles and the professional standard of care established by legal custom as a framework, situations involving ethical dilemmas were gleaned from the nursing literature. They were reviewed for content validity, clarity and representativeness in a two-stage process by expert panels. The situations were presented in a (...) written format to a convenience sample of nurses (n = 125), who were primarily staff nurses (65.6%). Respondents' judgements about whether the main issue of each situation concerned ethics ranged from a low of 0.8% to a high of 40%. From analyses of the categories into which the majority of subjects placed each situation, it was concluded that these nurses generally perceived ethics as the main issue in situations that directly involve patients' autonomy. Analysis yielded unanticipated findings about the themes in ethical situations to which nurses in practice may respond. (shrink)