ABG Answers Sheet ABG Practice Question 1 pH 7.25 , PaCO₂ 55 , HCO₃ 25 A pH B 7.25 7.35 7.45 A B Step 1: pH 7.25 is below 7.35 so it is Acid Step 2: Match pH with it’s partner CO2 is 55 so it is Acid We have a match in the lung area = respiratory acidosis HCO3 25 - normal range, no match PaCO₂ 35 45 A Normal B 22 25 26 55 HCO₃ Answer: Respiratory Acidosis Uncompensated Step 3: Compensated or Uncompensated? Is the ph in normal range? NO, it's not in balance, it did not ﬁnd common ground in compensation Ph is UNcompensated (not normal range) Acidosis ABG Practice Question 2 pH 7.57 , PaCO₂ 25 , HCO₃ 22 pH Step 1: pH 7.57 is above 7.45 so it is Base (Alkalosis) PaCO₂ B A 7.35 7.45 7.57 B 25 HCO₃ Step 2: Match pH with it’s partner CO2 is 25 Base (Alkalosis) We have a match in the lung area = respiratory alkalosis HCO3 22 - normal range, no match Step 3: Compensated or Uncompensated? Is the ph in normal range? NO, it's not in balance, it did not ﬁnd common ground in compensation Ph is UNcompensated (not normal range) A 35 45 A B 22 26 Answer: Respiratory Alkalosis Uncompensated ! ! Alkalosis ! ABG Practice Question 3 A pH 7.21 , PaCO₂ 39 , HCO₃ 19 Step 1: pH 7.21 is below 7.35 so it is Acid pH B 7.21 7.35 7.45 A Normal B 35 39 45 PaCO₂ A B HCO₃ Step 2: Match pH with it’s partner CO2 is 39 - normal range, no match HCO3 is 19 Acid We have a acid match for the kidneys = Metabolic acidosis Step 3: Compensated or Uncompensated? Is the ph in normal range? NO, it's not in balance, it did not ﬁnd common ground in compensation pH is UNcompensated (not normal range) 19 22 26 Answer: Metabolic Acidosis Uncompensated ! ! Acidosis !

ABG Answers Key Sheet

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