RESULTS AND PROBLEMS OF WOVEN DACRON PROSTHESES USED IN THE OPERATION OF THE AORTA

Abstract

Clinical and pathologocal results were studied in 198 patients to whom woven Dacron prostheses were implanted for the aortic region in the past 16 years. Preclotting was performed by blood, autoclaved blood or autoclaved albumin in 111 cases and postoperative anticoagulant therapy was performed in 73 cases. The observed periods were 55.3 months in mean and 16 years in the longest. The complications related to the prostheses were incontrollable blood leak in 2 cases, hematoseroma formation in 2, late time bleeding of anastomotic site in one, infection in one, occiusion in one and distal anastomotic stenosis in one. In pathological study, the inner surface of the prosthesis after one month from implantation was covered with fibrin thrombi or exposed with Dacron fibers, and in some areas red thrombi adhered. After one year or more from implantation, pannus was seen in the anastomotic site and the inner surface of the prosthesis was covered with fibrin thrombi or pseudointima which was constructed mainly by collagen fibers. Some protheses had red thrombi on the inner surface.