• This article reports on observation of 18 nurses in urban and rural based critical care settings.
• The purpose of the study was to observe and describe the decision-making activities of critical care nurses within natural clinical settings.
• During the 2-hour observation, the researcher dictated a detailed commentary on to audio-tape of each nurse's actions. Tapes were transcribed and subjected to content analysis.
• Findings indicated three main categories of decisions. Decision frequencies were linked to nurses' critical care experience, appointment level, and location, as well as nursing shifts.
• The findings are discussed in relation to previous empirical evidence and the implications for practice.
• The author concludes that future research should be directed towards measuring the contextual influences on nurses' decision-making on the outcome of patient care.