S-Space College of Medicine/School of Medicine (의과대학/대학원) Laboratory Medicine (검사의학전공) Journal Papers (저널논문_검사의학전공)
Evaluation of the TEST 1 erythrocyte sedimentation rate system and intra- and inter-laboratory quality control using new latex control materials
- Cha, Choong-Hwan; Cha, Young Joo; Park, Chan-Jeoung; Kim, Hyun Kyung; Kim, Duck Hee; Jung, Jae-Seol; Jang, Seongsoo; Lee, Dong Soon; Chi, Hyun-Sook; Kim, Mi-Jung; Hong, Hoon; Cha, Eun-Jong
- Issue Date
- WALTER DE GRUYTER & CO
- CLINICAL CHEMISTRY AND LABORATORY MEDICINE; Vol.48 7; 1043-1048
- Background: The erythrocyte sedimentation rate (ESR) test has been considered to be a simple procedure, not requiring quality control (QC). However, QC is essential for accuracy and precision. We evaluated the TEST 1 ESR system and performed QC procedures using newly developed latex control materials in three hospitals. Methods: Using tripotassium ethylenediaminetetraacetic acid blood samples (n=184), we compared TEST 1 ESR values with Westergren ESR data and evaluated intra-assay precision. Three levels of latex control materials were used to assess inter-assay precision. Reference range assessment was done using samples from 220 healthy individuals. Inter-laboratory QC with latex control materials in three hospitals was performed. Results: Correlation between TEST 1 ESR and Westergren ESR results was good (p<0.001). Intra-assay precision [coefficients of variation (CV) 6.6%-21.7%] with patient samples and inter-assay precision (CV 0.0%-6.8%) with latex control materials were satisfactory. The reference ranges of 2-10 mm/h for males and 2-19 mm/h for females were established. Inter-laboratory QC data with latex control materials in three hospitals demonstrated good accuracy and satisfactory precision (CV 0.0%-14.4%). Conclusions: Our results demonstrate that the TEST 1 QC is reliable and the latex control materials are valuable for inter-laboratory proficiency testing. Clin Chem Lab Med 2010; 48: 1043-8.