Analysis of the internal quality control results of testing TSH in dried blood spots by TRFIA

Objective:To explore the quality control of using TRFIA to test TSH in dried blood spots.Methods:Performing the statistical indicators(x,P50,SD,CV,max,min,etc)analysis to TSH in dried blood spots of quality control in a year;testing TSH in the different parts of blood spots simultaneously.Results:The testing indicators(x,P50) of TSH in dried spots of quality control both were in the ±20 range of the standard value(true value),the CV of C_1,C_2 were separately in 6.6%～11.7%,3.6～15.5%;the TSH testing value was in the 1/2 point of blood spots from center to side approached to the true value.Conclusions:The precision of the TSH testing value in dried blood spots tested by TRFIA to screen newborn Congenital Hypothroidism(CH)is high and the quality can be controlled effectively.