[III. Continued education in surgery. A. Prospective studies, methods for determination of therapy results. Topics on and results of prospective studies in surgery].

Since the first clinical prospective trial of J. Lind in 1753, the controlled study has proved to be an essential instrument in clinical research. Possible topics include: pharmacologic prophylaxis of complications such as stress ulcer, thrombosis, etc., indications for operation, preoperative preparation, choice of surgical procedure, and techniques or postoperative treatment. Examples for each topic are given.