Laboratory Medicine ›› 2024, Vol. 39 ›› Issue (8): 749-758.DOI: 10.3969/j.issn.1673-8640.2024.08.006

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Influence of hemoglobin,bilirubin,chylomicrons and calcium dobesilate on 3 determination systems

GONG Jingkai, OU Yuanzhu, YU Xiaoxuan, GE Danhong, LIN Feiran   

  1. Shanghai Center for Clinical Laboratory,Shanghai 200126,China
  • Received:2023-11-09 Revised:2024-02-06 Online:2024-08-30 Published:2024-09-02

Abstract:

Objective To investigate the effects of endogenous interfering substances [hemoglobin(Hb),bilirubin,chylomicrons] and exogenous interfering substance(calcium dobesilate) on the routine biochemical tests of 3 determination systems [Vitros 5600 system(dry chemistry),cobas c501 system(liquid chemistry),Maccura-7180 system(liquid chemistry)]. Methods According to the requirements of EP7-A2 document of the Clinical and Laboratory Standards Insititution(CLSI),serum or plasma basic control samples with high and low levels were used to formulate Hb,bilirubin F,chylomicrons and calcium dobesilate interference samples with different concentration gradients to simulate light,moderate and severe interference. Vitros 5600 system,cobas c501 system and Maccura-7180 system were determined,and the relative and absolute deviation of the determination results from the basic control samples were calculated. Results In the Hb interference test,9 of 13 items of Vitros 5600 system were interfered;10 of 13 items of cobas c501 system were interfered;8 of 11 items of Maccura-7180 system were interfered. In the bilirubin interference test,3 of 11 items were interfered in Vitros 5600 system,5 of 11 items in cobas c501 system,and 2 of 9 items in Maccura-7180 system. In the chylomicrons interference test,2 of 12 items were interfered in Vitros 5600 system,4 of 12 items in cobas c501 system,and 4 of 10 items in Maccura-7180 system. Calcium dobesilate interfered with creatinine(Cr) items of the 3 determination systems,but the degree of interference of Vitros 5600 system was less than that of the other 2 systems. Conclusions In the routine biochemical tests,different determination systems are affected by endogenous and exogenous interfering substances. The anti-interference ability of dry chemistry determination system is better than those of liquid chemistry determination systems.

Key words: Hemoglobin, Bilirubin, Chylomicron, Calcium dobesilate, Determination system, Interference

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