Blood<unk>  analyzers typically warm blood to 37°C before making calculations however physicians should simply interpret the values as given by the lab
At any temperature, a pH of 7.4 and a PCO2 of 40 mm Hg represent normal acid-base balance
The best (simplest) approach is to use uncorrected ABG values compared with the normal values at 37°C
Oxygen and carbon dioxide increase in solubility as water temperature lowers, so warmed ABGs from hypothermic patients with show a  higher PaO2, higher PaCO2 and a lower pH than what is actually present in the patient’s blood although the clinical implications of this change is not significant.
PO2 is 5 mmHg lower for each degree below 37C°
PCO2 is 2mmHg lower for each degree below 37C°
Arterial blood gas analysis
Venous blood gas
Cardiac ultrasound
ECG 
Pulmonary artery catheter
Age adjusted D-dimer
Initial mechanical ventilation settings 
Initial mechanical ventilation settings