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Blood Collection

Blood Gases

February 15th, 2021


  • Effects of Late Testing

  • Ongoing cellular metabolism will occur as specimens are left without being tested.
  • Decreased pO2 and increased pCO2 - due to ongoing metabolism
  • Decreased pH - due to increase in pCO2
  • Decreased calcium - due to increased binding to protein at a lower pH
  • Increased glucose - due to glycolysis
  • Increased lactate - due to glycolysis
  • Prevention

  • Cool the sample to 0-4 degrees using ice if it is unlikely to be processed within 15 minutes.
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