normal range for pco2 in the blood
35-45 mm Hg. ---. The normal PaCO2 (arterial partial pressure of carbon dioxide in the blood) is 40mmHg. There is a normal range, which is 35-45mmHg.For those with COPD 60 or below is good.o. Once blood reaches the alveoli it will immediately start to release CO2 to the air in our lungs and absorb O2 from the air in our lungs. This means that the PCO2 will be h â¦ igher in the blood of the pulmonary artery than in the blood of the alveolus.