Arterial Blood Gas Analysis PDF

Arterial blood gas analysis Arterial blood gas analysis Determination of O2 and CO2 partial pressures in whole blood (typically also includes pH) Arterial blood gas analysis Provides information on: PaO2 – Gas exchange PaCO2 – Ventilatory status pH – Acid-base status What about venous blood g...

Arterial blood gas analysis Arterial blood gas analysis Determination of O2 and CO2 partial pressures in whole blood (typically also includes pH) Arterial blood gas analysis Provides information on: PaO2 – Gas exchange PaCO2 – Ventilatory status pH – Acid-base status What about venous blood gases? Sacks et all. 2004 Arterial blood gas analysis Interpretation of PaO2 and PaCO2 Determine the cause of hypoxemia Causes for Hypoxemia (low PaO2): 1. Low PIO2 (FiO2) 2. High PACO2 (hypoventilation) 3. V / Q mismatch 4. Blood shunting R L (anatomical) 5. Diffusion impairment (alveoli) Case #1 During an externship in Mexico city, you are asked to interpret the following ABG taken at room air: PB 585 mmHg PaO2 58 mmHg PaCO2 36 mmHg Case #2 A dog is heavily sedated for a wound assessment, cleaning and suture. You notice the pulse oximeter is reading below 90%. We obtain the following arterial blood gas: PB 640 mmHg PaO2 45 mmHg PaCO2 60 mmHg Case #3 A dog presents to the ER in respiratory distress and cyanotic. You place the dog in an O2 cage (FiO2 100%).We obtain the following arterial blood gas: PB 640 mmHg PaO2 195 mmHg PaCO2 35 mmHg Case #4 A cow in the FAX lab this morning was sedated to recumbency for examination of her foot. The following blood gas was taken during the procedure: PB 640 mmHg PaO2 44 mmHg PaCO2 42.7 mmHg