1. Introduction -- 2. Medical Work and Sociomaterial Practices: a Theoretical Overview -- 3. The Research Setting: Doing Ethnography in the operating Room -- 4. Working in the Operating Room, Flirting With Objects and Technologies -- 5. Communicating in the Operating Room: on the Mutual Relationship Between Technical Objects, Communicative Practices, and Organizing -- 6. Learning the Trade: Professional Visions and Organizational Power at Work -- 7. Conclusions. .