Abstract:
Objective
To unveil the causes of unqualified specimens and provide basis for improvement so as to make progress in the pre-testing quality by overall tracing of inpatients’ blood specimens and periodical analysis.
Methods
The entire process monitoring information system based on blood sample barocode was adopted to compare the rate of specimen loss overdue transportation and rejection between January to June 2012 and January to June 2013 in the Second Affiliated Hospital, Zhejiang University School of Medicine. The distribution of unqualified specimen and causes were futher analyzed.
Results
Totally 501 135 in patients blood samples were received with 0.006‰ (3/501 135 specimens) sample loss rate, 1.64% (8195/501 135 specimens) specimen transportation overtime rate, 3.676‰ (1842/501 135 specimens) specimen unqualified rate from January to June 2013;otherwise, 450 463 specimens with 0.053‰ (24/450 4630 specimens) loss rate, 6.50% (29 280 / 450 463 specimens)transportation overtime rate, 7.830‰ (3527/450 463 specimens) unqualified rate without control measures during the first half year of 2012 were received, differences were statistically significant (χ2=18.7, 14839.9, 729.7,P＜0.01) between those two periods; the clotted, haemolysed and insufficient volume were the three main rejection reasons which accounts for 28.3% (521/1842 specimens), 27.6% (508/1842 specimens) and 24.8% (456/1842 specimens) respectively. Unqualified specimens are mainly distributed in six intensive care units (center ICU1/2,surgical ICU, neurology ICU, emergency ICU and heart ICU) ,which accounts for 32.6% (118/362 specimens),39.3% (87/221 specimens), 35.0% (112/320 specimens), 32.7% (113/354 specimens), 32.2% (98/306 specimens)and 22.5% (63/27 specimens) of total reject ratio from January to June 2013.
Conclusions
Full monitoring of specimens in the pre-analysis by Laboratory Information Systems can improve the timely rate of specimens transportation and reduce the rate of the lost and unqualified specimens. Analysis of the occurrence rate of unqualified specimens and effectively negotiating with relevant departments can make great progress in preanalytical quality control of blood specimens.
Key words:
Blood samples,
Monitoring,
Pre-analysis quality control
Yan Jiang, Chao Zhang, Jianlan Chen, Yingyu Fu, Xiuzhi Duan, Zhihua Tao. Pre-analysis quality control of inpatients′ blood samples and the cause analysis of unqualified specimen[J]. Chinese Journal of Clinical Laboratory Management(Electronic Edition), 2014, 02(01): 26-31.