title: Studying man-machine interfaces in the operating room.
abstract: The concept of interface as a system-linking device is introduced and examples of man&#150;machine interfaces in the operating room are given. Studying effectiveness of these systems links requires input from multiple professionals, including surgeons and engineers. Video recording performances of operators is a valuble research methodology. Using behavioural observation coding of actions seen on videotapes allows computational analysis of selected actions. One experience with introducing a video study is related. The future holds promise for a wide range of technologically aided performance improvements in the surgical suite. Some improvements will be appropriated from other fields. Participating in the research and development of these new products will be a rewarding role in the medical world.