A child is in uncompensated respiratory acidosis. What should the nurse expect the arterial blood gas to be?
a. O2, 95; CO2, 45; pH, 7.40
b. O2, 88; CO2, 55; pH, 7.30
c. O2, 88; CO2, 35; pH, 7.28
d. O2, 92; CO2, 54; pH, 7.35
ANS: B
Respiratory acidosis results from diminished or inadequate pulmonary ventilation that causes an elevation in plasma Pco2 and thus an increased concentration of dissolved carbonic acid, which leads to elevated carbonic acid and hydrogen ion concentration. This tends to lower the pH. CO2 of 55 is elevated (normal CO2 is 35–45), and a pH of 7.30 is low (normal pH is 7.35–7.45).
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