The action of platelet activating factor in the rat brain was detected by Evans bluestaining after injection of PAF into the rat brain.

• 颈内动脉注射血小板激活因子(PAF),再给伊文思蓝,可见脑实质染色程度加深,而颈内动脉只注射伊文思蓝,脑实质未见染色。