CSCW is devoted to the analysis of interactions among humans when performing together their work [2]. The main application fields are work organization, healthcare, education and training. Our main goal is to study the cooperative models allowing task coordination and conflict management between actors within a distributed environment, in particular medical units. We do not aim to produce a practical system suitable for near-term deployment in the Intensive Care Units (ICU), but rather an experimental system that performs and coordinates a range of intelligent planning tasks in ICU activities. The emphasis will be put especially on asynchronous cooperation. We apply the Workflow approach to ICU organization through the analysis and propose of a cooperative model.