In a typical blood gas analyser: (A) Oxygen tension will be overstimulated in hypothermia, (B) pH is a derived measurement, (C) Standard bicarbonate can be used to indicate the respiratory component, (D) The oxygen tension can be measured using Clarke electrode.
Answer is D. Oxygen tension falls with hypothermia. The pH electrode directly measure pH. The standard bicarbonate measured in sample titrated to pCO2 of 5.3 kPa, which eliminates respiratory component.