[Pre-analytical stability before centrifugation of 7 biochemical analytes in whole blood].

Ann Biol Clin (Paris)

Département de biochimie et pharmaco-toxicologie, Hôpital de la Cavale-Blanche, CHRU, Brest, France, Laboratoire de neurosciences de Brest (LNB), Faculté de médecine, Brest, France.

Published: June 2016

The pre-analytical stability of 7 biochemical parameters (parathyroid hormone -PTH-, vitamins A, C E and D, 1,25-dihydroxyvitamin D and insulin) at +4 °C, was studied on whole blood samples before centrifugation. The impact of freezing at -20°C was also analyzed/performed for PTH and vitamin D. The differences in the results of assays for whole blood samples, being kept for different times between sampling time and analysis, from 9 healthy adults, were compaired by using a Student t test. The 7 analytes investigated remained stable up to 4 hours at +4°C in whole blood. This study showed that it is possible to accept uncentrifuged whole blood specimens kept at +4°C before analysis. PTH is affected by freezing whereas vitamin D is not.

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http://dx.doi.org/10.1684/abc.2015.1060DOI Listing

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