An automated blood gas analyzer performs two-point calibrations that match expected values.Subsequent quality control runs show unacceptable values for PO₂ and PCO₂,but pH is acceptable.Which of the following is the most likely problem? A) Contaminated buffers B) Contaminated calibration gas C) Analyzer temperature not at 37° C D) Computer error

Question

Quizplus · Accepted Answer

Contaminated calibration gas is the most likely problem because the issue affects both PO2 and PCO2 measurements but not pH. Contamination in the calibration gas would directly impact the accuracy of oxygen and carbon dioxide measurements, while pH, which is measured differently, remains unaffected.

An Automated Blood Gas Analyzer Performs Two-Point Calibrations That Match