四、附件 附件 1:注射剂灭菌工艺选择的决策树 附件2:生物指示剂的接种量(即初始芽孢数)的计算方法 根据公式:lgN0= F(T,z) / DT+lgNT 公式中,F(T,z)——在规定的温度系数(z 值)下,灭菌工艺期望获得的温度 T/℃下的等效灭菌时间,min; DT——生物指示剂在温度 T/℃下的耐热参数,min; N0——灭菌前生物指示剂的初始芽孢数; NT——灭菌后生物指示剂的存活芽孢数; 一般在灭菌验证时,要求灭菌后所有生物指示剂为阴性结果(即全部杀灭),则 NT 实际能够达到 10-1~10-2,甚至更低。 但是,为了增加灭菌保障的安全边际,一般取 NT=1,即 lgNT =0。 以上公式中,当生物指示剂确定后,其 DT可确定,灭菌工艺确定后,所期望的灭菌值 F(T,z)可确定,lgNT 取 0,则可计算 N0。 特殊情况下,若选取 NT<1 计算 N0,应提供合理性说明。
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