||I will show you the start of a model describing the work domain for nurses working within an intensive care unit (ICU). The focus is on bed-side, meaning the medical technologies function mapped to the higher level purpose of the intensive care unit – to keep the patient alive during the lifesaving treatment. About 16 hour of interviews with two experienced intensive care nurses working in an ICU at the Uppsala University Hospital are conducted so far. Also, observations at the same ICU are conducted during a total of 18 hours, divided into two work shifts (daytime and nighttime). I will explain the method used, show you the analysis made so far, and talk about the future plans with the study.