The correct answer is:

Meaningful interpretations of blood gases cannot be done without the adequate knowledge of the clinical situation and FIO2. You always have to determine the adequacy of the level of arterial oxygen in relation to FIO2. Always record the FIO2 at the time the sample was drawn.

Metabolic and respiratory components influences the results and one cannot interpret gases without knowing the clinical information. Hence, it is not our policy to interpret blood gases in the Pulmonary Function Lab.

Temperature alters hemoglobin dissociation curves. Appropriate corrections have to be made for the patient's body temperature, it they are markedly abnormal.