Human-Machine interfaces constitute a key factor to guarantee the effective use of technological equipment. In the field of image guided surgery and surgical robots, the availability of an adequate interaction means determines the suitability or not of a given technological aid. This work focuses on the problems surgeons find in planning and executing a robot assisted intervention. Analyzing the potential of computer graphics, together with the surgeons needs during, first, the planning and later on the development of a surgical intervention, the specifications and the implementation of an interface is described. In the design of this interface, special attention has been put on the gesture and attention capabilities that surgeons can devote to the interface.