ABG Analysis Example 2

If you need to review the basics of abg interpretation refer to these steps .

  • pH 7.48
  • Co2 22
  • Bicarb 22
  • Po2 71
  • Spo2 92

Is the pH above or below normal range?It is above so we have alkalosis

  1. Is the pH normal? No, it is uncompensated
  2. Is the pH above or below normal range?It is above so we have alkalosis
  3. Is the Co2 normal?  No, it is a respiratory issue 
  4. Is the bicarb with in range?  Yes
  5. Is the Po2 normal?  No, hypoxemia is present

The final analysis uncompensated respiratory acidosis with hypoxemia

For tce test you always ask the following:

  1. Is the patient ventilating?  Yes the patient is over ventilating
  2. Is the patient oxygenating? No, adjustments should be made

I have a free Basic ABG analysis tip sheet with 6 examples that are explained.

ABG Interpretation Example 1

If you need to review the basics of abg interpretation refer to these steps

  • pH 7.28
  • Pco2 57
  • Bicarb 23
  • Po2 72
  • Spo2 94
  1. Look a pH- is it normal? No, it is not so it is uncompensated. The pH is low so it is an acidosis.
  2. Look at PCO2, is it normal? No is not, it is a respiratory issue
  3. Look at the bicarb is it normal? Yes
  4. Look at the PO2 is it normal ? No it isn’t, it is hypoxemia is present

Putting the individual results from above together the final analysis is uncompensated respiratory acidosis with hypoxemia.

During the TMC and clinical simulation exams an example similar to this could be used as part of the scenario. The first question you need to ask is the patient ventilating? Since this patient has uncompensated respiratory acidosis they are not ventilating. Ventilation is necessary for survival so this must be addressed first. If there are no options to address ventilation then we would move on to oxygenation

ABG Interpretation Basics

Before we begin analyzing abgs we need to have the normal values:

  • pH 7.35
  • pCO2 35-45
  • Bicarb 22-26
  • Po2 80-1000

First thing you look at is the pH, is it normal? If it is then it is compensated. If the pH is not normal it is uncompensated.

When the pH is low it is called acidosis.  When the pH is high it is called alkalosis.  (I like to remember it by the c in acidosis is lower in the alphabet then the l in alkalosis is)

If the pCo2 is abnormal it is a respiratory issue.

If the bicarb is abnormal it is a metabolic issue.  

If the pO2 is low their is hypoxemia present

 

Get your free Basic ABG analysis tip sheet and 6 examples explained here