Question

A nurse is caring for a client who requires nasogastric suctioning. Which of the following sets of lab results indicates that the client has metabolic alkalosis?

A. pH 7.35, PaCO2 45, HCO3 24
B. pH 7.50, PaCO2 40, HCO3 28
C. pH 7.25, PaCO2 35, HCO3 22
D. pH 7.45, PaCO2 38, HCO3 20

Answer 1

The lab results indicating metabolic alkalosis are those with a high pH above 7.45 and a high bicarbonate level. Option B (pH 7.50, PaCO2 40, HCO3 28) is the correct answer as it meets these criteria.

Step-by-step explanation:

The client's set of lab results that indicates metabolic alkalosis is characterized by an increased blood pH above the normal range (7.35-7.45) and an increased bicarbonate (HCO3) level. From the given options, B. pH 7.50, PaCO2 40, HCO3 28 suggests metabolic alkalosis as the pH is above 7.45 and the HCO3 level is higher than the normal range of 22-29 mM, despite a normal PaCO2, which is within the range of 35-45 mm Hg (for females) or 35-48 mm Hg (for males), as referenced in Table 26.3. It shows that the imbalance is metabolic rather than respiratory, and as the PaCO2 is not compensating for the alkalosis, it suggests a primary metabolic disorder.