The present study aims to show how various medical and nonmedical components contribute to success and failure in the management of colorectal cancer.
The first encounter, subsequent diagnosis, and surgical therapy of a patient with Dukes B sigmoid cancer is modeled as a reliability block diagram with a serial and parallel arrangement of various components.
The overall probability of a patient with new-onset colorectal cancer to visit a physician, be correctly diagnosed, and undergo successful therapy is 69%. The reduction in the overall success, despite the fact that the majority of components are assumed to function with failure rates of 5% or less, is a reflection of the multitude of serial subsystems involved in the management of the patient.
In contrast, the parallel arrangement of subsystems results in a relative insensitivity of the overall system to failure, a greater stability, and an improved performance.
Since no medical system functions perfectly, redundancy associated with parallel subsystems assures a better overall outcome.
System analysis of health care provides a means to improve its performance.
Mots-clés Pascal : Analyse décision, Choix, Traitement, Carcinome, Côlon, Rectum, Fiabilité, Bloc diagramme, Technique, Evaluation performance, Homme, Modélisation, Tumeur maligne, Appareil digestif pathologie, Intestin pathologie, Côlon pathologie, Rectum pathologie, Biomathématique
Mots-clés Pascal anglais : Decision analysis, Choice, Treatment, Carcinoma, Colon, Rectum, Reliability, Block diagram, Technique, Performance evaluation, Human, Modeling, Malignant tumor, Digestive diseases, Intestinal disease, Colonic disease, Rectal disease, Biomathematics
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0154008
Code Inist : 002B30A01C. Création : 16/11/1999.