the reported incidence of thrombocytopenia ( 1 per cent for heparin of porcine mucosal , and 5 per cent for heparin of bovine lung origin ) probably represents an underestimate of its true frequency because some patients have a heparin-induced fall in the platelet count that does not reach thrombocytopenic levels .
C0040034
thrombocytopenia
C0019134
heparin