In type II respiratory failure,there is
High-Yield Explanation
Ref Harrison 19 th ed. pg1731-1732 Type II respiratory failure is characterized by decreased paO2 and incresinc paCO2 as a result of alveolar hypoventilation.there is fall in minute ventilation which causes a rise in PaCO2 and fall in PaO2. The alveolar aerial gradient is normal in Type 2 respiratory failure.