UT Arlington NURS-UL 3365 - ABGs interpretation summary-1 (6 pages)

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ABGs interpretation summary-1



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ABGs interpretation summary-1

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Pages:
6
School:
University of Texas at Arlington
Course:
Nurs-Ul 3365 - Pharmacology in Nursing Practice

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ABGs Interpretation Chart General info tips ABGs stands for arterial blood gases a measurement of oxygenation acid base balance in the blood norms pH 7 35 7 45 memorize this range but not necessary to memorize the others HCO3 bicarb 2226 PCO2 35 45 PO2 80 100 SO2 97 100 These things go together 1 High numbers of H or high CO2 or low HCO3 cause low pH acid state acidosis Think of H CO2 as the acid gang 2 Low numbers of H or low CO2 or high HCO3 bicarbonate cause high pH alkaline state alkalosis Think of HCO3 as the alkali guy If the acidosis or alkalosis is caused by a respiratory problem it is called respiratory acidosis or alkalosis If caused by anything else kidney problem diabetes etc it is called metabolic acidosis or alkalosis For TEST 1 material we will mostly focus on metabolic derangements then in the pulmonary section TEST 3 we will bring everything together more Compensation to fix a metabolic acid base problem the lungs compensate by getting rid of or hanging on to CO2 to fix a respiratory acid base problem the kidneys compensate by controlling H HCO3 getting rid of or hanging on to them Please note that there is a difference between talking about CO2 an acid in the body and PCO2 partial pressure of CO2 as a gas Methodical way to interpret ABGS 1 look at pH acidosis or alkalosis 2 look at HCO3 if it is not within normal range the subcategory is metabolic 3 look at pCO2 if it is not within normal range the subcategory is respiratory NOTE It is not enough to be able to label a set of numbers as metabolic acidosis or alkalosis or respiratory acidosis or alkalosis You have to know why those numbers have changed and then how the body fixes the problem For more info on that see the charts below same basic info in both but one might be easier for you to understand than the other CHART 1 alteration metab acidosis PCO2 PO2 SO2 examples causes S S body s compensation 22 norma l usuall y norma l usually normal found in situations in which either 1 a metabolic



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