A ventilation-perfusion inequality: Whenever
the bicarbonate concentration also rises, due to dissociation of carbonic acid.
A pH less than 7.35, with a PaCO2
greater than 45 mm/Hg. The acid state
occurs when an accumulation of PaCO2
combines with water to produce carbonic
acid, which lowers blood pH. Hypoventilation can lead to Respiratory Acidosis, and an
increase in ventilation may correct the problem.
Arterial blood gas example:
|Cardiovascular ||Tachycardia, Dysrhythmias|
|Neurological ||Confusion, Headache, Restlessness|
|Pulmonary ||Dyspnoea, Respiratory distress, Shallo breathing|
- pH = 7.3 - acid
- PCO2 = 55 - acid
- HCO3 = 26 - normal
Compensated Respiratory Acidosis: if PaCO2
indicates acidosis, and
indicates alkalosis, and pH is normal, but less than 7.4.