ay, such as a catheter, past or against an obstruction or irregularity in the passageway, such as a wire placed in the catheter; platelets adhere and aggregate on the obstruction or on the wall of the passageway near the obstruction or irregularity, form a platelet massClasificaciones Clasificaci???n de EE.UU.435/13, 422/68.1, 435/287.9, 436/69, 435/2 Clasificaci???n internacionalG01N33/49, G01N33