The level of blood platelet activating f actor(PAF)before and after the treatment on bro nchial asthma children with Ginkgo biloba extract was examined in a biologicalway.

• 检测患儿治疗前后血浆血小板活化因子(PAF)水平,观察哮喘临床症状改善情况并与激素治疗组儿童血浆PAF水平比较。