Objectives: To assess the performance of the Doumas bilirubin reference method.
Design And Methods: Ring trails using pooled patient specimens, a calibrator and human sera enriched with unconjugated bilirubin were analyzed in five laboratories using the Doumas bilirubin reference method.
Results: The coefficient of variation for the linear measurement range between laboratories ranged from 1-3%.
Conclusions: The Doumas bilirubin reference method is robust and reproducible. Bilirubin results using this method may be used in the development of more accurate and reliable calibrators.
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http://dx.doi.org/10.1016/j.clinbiochem.2009.05.007 | DOI Listing |
Clin Chem Lab Med
September 2020
Department of Chemical Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong.
Background Eltrombopag is a thrombopoietin receptor agonist used for the treatment of thrombocytopenic conditions. It can cause pH-dependent discoloration of plasma/serum. Eltrombopag is potentially hepatotoxic.
View Article and Find Full Text PDFClin Chim Acta
June 2018
Medizinische Hochschule Hannover, Institute of Clinical Chemistry, Carl-Neuberg-Str. 1, 30625 Hannover, Germany. Electronic address:
Background: For the determination of total bilirubin in serum the candidate reference method developed by Doumas et al. has international recognition. The primary standard SRM 916a (NIST) was recommended for use as the primary reference material for calibration.
View Article and Find Full Text PDFSemin Perinatol
June 2011
Department of Pathology and Laboratory Medicine, Children's Hospital of Wisconsin, Milwaukee, WI 53226, USA.
In 2003, the Chemistry Resource Committee of the College of American Pathologists introduced a new specimen in the Neonatal Bilirubin Survey. The specimen, consisting of human serum enriched with unconjugated bilirubin and thus resembling a clinical specimen, brought about an improvement in the accuracy of the measurement of bilirubin by laboratories participating in the Neonatal Bilirubin Survey. There was also an improvement in the specificity of methods measuring direct bilirubin.
View Article and Find Full Text PDFClin Biochem
August 2010
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA.
Objectives: To determine the relationship between BiliChek TcB (Respironics, Marietta GA) and Doumas reference serum or plasma total bilirubin (TSB).
Design And Methods: Pooled samples with values assigned by the Doumas reference method were used to establish the relationship between a local laboratory and reference Doumas TSB. We then established the relationship between TcB and TSB in the 3 months before and after reassignment of calibrator setpoints undertaken to match the local laboratory to Doumas reference bilirubin values.
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