A male client with Guillain-Barré syndrome develops respiratory acidosis as a result of reduced alveolar ventilation. Which combination of arterial blood gas (ABG) values confirms respiratory acidosis?
a. pH, 5.0; PaCO2 30 mm Hg
b. pH, 7.40; PaCO2 35 mm Hg
c. pH, 7.35; PaCO2 40 mm Hg
d. pH, 7.25; PaCO2 50 mm Hg
Answer D.
In respiratory acidosis, ABG analysis reveals an arterial pH below 7.35 and partial pressure of arterial carbon dioxide (PaCO2) above 45 mm Hg. Therefore, the combination of a pH value of 7.25 and a PaCO2 value of 50 mm Hg confirms respiratory acidosis. A pH value of 5.0 with a PaCO2 value of 30 mm Hg indicates respiratory alkalosis. Options B and C represent normal ABG values, reflecting normal gas exchange in the lungs.
a. pH, 5.0; PaCO2 30 mm Hg
b. pH, 7.40; PaCO2 35 mm Hg
c. pH, 7.35; PaCO2 40 mm Hg
d. pH, 7.25; PaCO2 50 mm Hg
Answer D.
In respiratory acidosis, ABG analysis reveals an arterial pH below 7.35 and partial pressure of arterial carbon dioxide (PaCO2) above 45 mm Hg. Therefore, the combination of a pH value of 7.25 and a PaCO2 value of 50 mm Hg confirms respiratory acidosis. A pH value of 5.0 with a PaCO2 value of 30 mm Hg indicates respiratory alkalosis. Options B and C represent normal ABG values, reflecting normal gas exchange in the lungs.
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