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Respiratory Failure_
Gateway
Question | Answer |
---|---|
Respiratory Failure | Inability to maintain either the normal delivery of oxygen to the tissues or normal removal o f CO2 |
Respiratory Failure ABG | PaO2 < 60 and CO2 > 50 |
Type 1 | Hypoxemic - Inadequate O2 delivery |
Type 2 | Ventilatory failure : Hypercapnia : Inability to remove CO2 : Can be acute on chronic |
Cause Type 1 | V/Q mismatch : Shunt : Alveolar hypoventilation : Perfusion/Diffusion impairment |
Cause Type 1 | Decreased inspired O2 : Venous admixture |
V/Q Mismatch | Ventilation and perfusion not evenly matched |
Shunt | Extreme version of V/Q mismatch in which there is no ventilation to match perfusion |
Anatomical Shunt | 2% - 3% blood supply through bronchial and thebesian veins |
Causes of Shunt | Atelectasis : Pulmonary Edema : Pneumonia |