Modification of human platelet behaviour in diabetes.

Among the different factors which could be responsible for the retinal vascular disturbances in diabetic retinopathy, we have investigated platelet populations, sialic acid content of platelets and collagen-induced platelet aggregation. The following results were obtained: a) there was no modification of platelet population distribution except for population A; b) there was a modification of collagen-induced platelet aggregation; the lag time was increased in diabetics.