The purpose for this paper was to explore, on the basis of a previous research program, the foundations of caring associated with the ethos in the common world of the perioperative dialog. Ahermeneutic approach grounded in caring science was employed, in which ethos represents the ultimate meaning of caring. This approach resulted in a model comprising the caring properties and characteristic structural caring principles. As a guiding principle of the common world, ethos revealed a deeper principle of order, the responsibility of the face--"Here I am."