How do you increase pao2 with mechanical ventilation?
In manual ventilation you can increase the PaO2 by
hyperventilating the patient, by increasing the respiratory rate
and/or by increasing the volume of air that you deliver to the
patient. If using a BVM for example, compressing the bag faster
and/or harder will increase the arterial oxygen pressure, but there
is a limit to what you can do with manual ventilation. Perfusion in
the lungs has a major impact on PaO2. Also, the blood chenistry
(anemia or CO2 poisoning) for example will dramatically decrease
the PaO2. Sometimes no matter how much you hyperventilate the
person, low PaO2 can't be corrected.