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ABG's
| Question | Answer |
|---|---|
| What is the normal pH range? | 7.35-7.45 |
| What is the normal range for PaCO2? | 35-45mmHg |
| What is the normal range for HCO3? | 22-26mEq/L |
| What is the normal range for base excess? | -2-2.0mEq/L |
| What type of issue(s) are we looking for when we look at the HCO3 and base excess value(s)? | Metabolic issues |
| What type of issue(s) are we looking for when we look at the PaCO2 value(s)? | Ventilation status |
| What does the PaO2 measure? | Oxygenation status |
| What are the hypoxemia ranges? | >60mmHg (mild hypoxemia) 40-59mmHg (moderate hypoxemia) <40mmHg (severe hypoxemia) |
| What range of PaO2 is considered normal on room air? | 80-100mmHg |
| What ABG value would we look for in patients that currently smoke or have smoked heavily in the past? | %MetHb |
| What ABG value would we look for in patients that have carbon monoxide poisoning or have been in a fire? | %COHb |
| Below what pH value is considered to be acidic? | <7.35 |
| Above what pH value is considered to be alkalotic? | >7.45 |
| Three anatomical sites for an ABG: | 1)radial artery 2)femoral artery 3)dorsalis pedis |
| In a given ABG, if the pH and CO2 are going in DIFFERENT directions, what is this ABG considered to be? | Respiratory |
| In a given ABG, if the pH and HCO3 are going in the SAME direction, what is this ABG considered to be? | Metabolic |
| When interpreting a given ABG, what values must be abnormal for it to be considered "partial"? | All values must be abnormal. (pH, CO2, and HCO3) |
| When interpreting a given ABG, what values must be normal for it to be considered "uncompensated"? | Either the CO2 or HCO3 |
| When interpreting a given ABG, what value must be normal for it to be considered "compensated"? | The pH must be normal |