Your browser doesn't support javascript.
loading
Quality assurance of add-on testing in plasma samples: stability limit for 29 biochemical analytes.
Illana, Francisco J; García-Osuna, Álvaro; Sospedra, María; Ferrer, Rosa; Martínez-Brú, Cecília; Guiñón, Leonor.
Afiliação
  • Illana FJ; Biochemistry Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
  • García-Osuna Á; Institut de Recerca Sant Pau (IR SANT PAU), Barcelona, Spain.
  • Sospedra M; Biochemistry Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
  • Ferrer R; Institut de Recerca Sant Pau (IR SANT PAU), Barcelona, Spain.
  • Martínez-Brú C; Core Laboratory, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
  • Guiñón L; Biochemistry Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
Biochem Med (Zagreb) ; 34(2): 020704, 2024 Jun 15.
Article em En | MEDLINE | ID: mdl-38665870
ABSTRACT

Introduction:

Clinical laboratories should guarantee sample stability in specific storage conditions for further analysis. The aim of this study is to evaluate the stability of plasma samples under refrigeration for 29 common biochemical analytes usually ordered within an emergency context, in order to determine the maximum allowable period for conducting add-on testing. Materials and

methods:

A total of 20 patient samples were collected in lithium heparin tubes without gel separator. All analyses were performed using Alinity systems (Abbott Laboratories, Abbott Park, USA) and samples were stored at 2-8 °C. Measurements were conducted in primary plasma tubes at specific time points up to 48 hours, with an additional stability study in plasma aliquots extending the time storage up to 96 hours. The stability limit was estimated considering the total limit of change criteria.

Results:

Of the 29 studied parameters, 24 demonstrated stabilities within a 48-hour storage period in primary plasma tubes. However, five analytes aspartate aminotransferase, glucose, lactate dehydrogenase, inorganic phosphate and potassium evidenced instability at different time points (7.9 hours, 2.7 hours, 2.9 hours, 6.2 hours and 4.7 hours, respectively). The stability study in plasma aliquots showed that all parameters remained stable for 96 hours, except lactate dehydrogenase, with a stability limit of 63 hours.

Conclusions:

A reduced stability of primary plasma samples was observed for five common biochemical analytes ordered in an emergency context. To ensure the quality of add-on testing for these samples, plasma aliquots provide stability for a longer period.
Assuntos
Palavras-chave

Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Coleta de Amostras Sanguíneas Limite: Humans Idioma: En Revista: Biochem Med (Zagreb) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Espanha

Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Coleta de Amostras Sanguíneas Limite: Humans Idioma: En Revista: Biochem Med (Zagreb) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Espanha