Influence of Platelet Inhibitory Drugs on the Thrombogenicity of Dacron Arterial Grafts Perfused in an Artificial Circulation
The effect of Acetyl Salicylic Acid (ASA), Dipyridamole (DPM) and in combinations on the response of platelets to woven Dacron perfused in an artificial circulation was investigated. Circuits were perfused by heparinised blood donated by 6 volunteers after each had taken: -1) No drugs 2) ASA 300mg tds 3) DPM 100mg qds 4) ASA 300mg + DPM 75mg tds 5) ASA 80mg + DPM 75mg tds 6) ASA 80mg tds, for 1 week. Bleeding times were performed prior to each donation. Platelet functions were estimated during perfusion. Each grafts surface was examined by scanning electron microscopy (SEM) at the end of perfusion.Platelet inhibition by low dose ASA + DPM was accompanied by less extension of bleeding time, and we suggest that such combination may protect patency in Dacron grafts at risk.