Objective: Through the external quality assessment for ALT,investigate the national level of examination with ALT, standardize the examination method and improve the testing Quality in blood banks.

• 目的:通过血清丙氨酸氨基转移酶(ALT)检验室间质量评价工作,掌握全国血站血清ALT检验状况,使ALT检验逐步规范化,提高血站实验室ALT检验的水平和质量。