Pre-Analytical Variables in Blood Gas and Analyte Measurement Quiz
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Questions and Answers

What is an essential component of the pre-analytical phase of blood gas and analyte measurement?

  • Patient's medical history
  • Post-analytical interpretation
  • Laboratory equipment calibration
  • Specimen collection technique (correct)
  • In the study by Patel et al, what did they evaluate the effect of on arterial samples obtained from an indwelling arterial line?

  • Different flush volumes (correct)
  • Patient's age
  • Ambient temperature
  • Specimen transport time
  • What did the investigators note about potassium and PCO2 in capillary samples with a low-flush volume compared to arterial samples?

  • Potassium and PCO2 in capillary samples were significantly lower
  • Potassium and PCO2 in capillary samples showed no difference
  • Potassium and PCO2 in capillary samples were significantly higher (correct)
  • Potassium and PCO2 in capillary samples were not measured
  • What is one of the pre-analytical test variables for blood gas and analyte measurement?

    <p>Amount of specimen collected</p> Signup and view all the answers

    What did the study by Patel et al involve in terms of sample collection?

    <p>Simultaneous samples of 0.2mL each obtained by percutaneous puncture from an unwarmed heel and withdrawn from an indwelling arterial line</p> Signup and view all the answers

    What did the investigators report about the concordance between capillary and arterial pH when the blood sample obtained from the arterial line was preceded by a 1-mL flush volume?

    <p>Concordance between capillary and arterial pH</p> Signup and view all the answers

    What did the investigators note about the subjects in the study by Patel et al?

    <p>Ranged from 26 to 42 weeks of gestation at birth and did not have clinical evidence of right-to-left ductal shunting</p> Signup and view all the answers

    What did the investigators evaluate in terms of the effect of sample collection and handling?

    <p>The impact on sample quality and on interpretation of the results</p> Signup and view all the answers

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