What are the 3 steps in interpreting ABGS?
Step 1: The pH is less than 7.35, so an acidosis is present. Step 2: The values are moving in opposite directions, so it is a respiratory process. Step 3: Since the PCO2 is increased by 30 mm Hg, the pH should be decreased by 3 × 0.08, or 0.24 (± 0.02), to 7.16, which it has.
How do you know if it is compensated or uncompensated?
When PaCO2 and HCO3 values are high but pH is acidic, then it indicates partial compensation. It means that the compensatory mechanism tried but failed to bring the pH to normal. If pH is abnormal and if the value of either PaCO2 or HCO3 is abnormal, it indicates that the system is uncompensated.
How can you distinguish between respiratory metabolic acidosis and alkalosis?
Understanding acidosis and alkalosis test results
| pH | Bicarbonate | Condition |
|---|---|---|
| Low | Low | Metabolic acidosis |
| High | High | Metabolic alkalosis |
| Low | High | Respiratory acidosis |
| High | Low | Respiratory alkalosis |
How can you tell the difference between ABG and VBG?
ABGs can be more difficult to obtain, are more painful and require arterial puncture that risks complications. A peripheral venous blood gas (VBG) can be obtained as the nurse obtains IV access upon patient arrival, requiring no additional sticks or risk of arterial injury.
How do you interpret a blood gas analysis?
Interpreting an arterial blood gas (ABG) is a crucial skill for physicians, nurses, respiratory therapists, and other health care personnel. ABG interpretation is especially important in critically ill patients….Professionals.
| Disorder | Respiratory alkalosis |
|---|---|
| pH | ↑ |
| Primary problem | ↓ in PaCO2 |
| Compensation | ↓ in [HCO3-] |
What is normal ABG values?
The following are normal ranges for results of a blood gas test: pH: 7.35–7.45. partial pressure of oxygen (PaO2): 80–100 millimeters of mercury (mmHg) partial pressure of carbon dioxide: 35–45 mmHg.
How do you check ABG compensation?
Assume metabolic cause when respiratory is ruled out. If PaCO2 is abnormal and pH is normal, it indicates compensation. pH > 7.4 would be a compensated alkalosis. pH < 7.4 would be a compensated acidosis.
When do you use ABG?
Your doctor may ask for an arterial blood gas test to:
- Check for severe breathing and lung problems such as asthma, cystic fibrosis, chronic obstructive pulmonary disease (COPD), or obstructive sleep apnea.
- Check how treatments for your lung problems are working.