A nurse is caring for a client who has acute kidney injury (AKI). Which of the following arterial blood gas values would the nurse expect this client to have?

pH 7.49, HCO3 24, PaCO2 30

pH 7.26, HCO3 24, PaCO2 46

pH 7.26, HCO3 14, PaCO2 30

pH 7.49, HCO3 30, PaCO2 40

Answer and Explanation

The Correct Answer is C

Choice A Reason: This choice is incorrect because it indicates respiratory alkalosis, not AKI. Respiratory alkalosis is a condition in which the lungs eliminate too much carbon dioxide (CO2) from the blood, resulting in a low level of CO2 (PaCO2) and a high level of pH. A normal PaCO2 range is 35 to 45 mm Hg, and a normal pH range is 7.35 to 7.45, so a value of 30 mm Hg and 7.49 indicate respiratory alkalosis.

Choice B Reason: This choice is incorrect because it indicates respiratory acidosis, not AKI. Respiratory acidosis is a condition in which the lungs cannot eliminate enough CO2 from the blood, resulting in a high level of CO2 (PaCO2) and a low level of pH. A value of 46 mm Hg and 7.26 indicate respiratory acidosis.

Choice C Reason: This choice is correct because it indicates metabolic acidosis, which is a common complication of AKI. Metabolic acidosis is a condition in which the body produces too much acid or loses too much base, resulting in a low level of bicarbonate (HCO3) and a low level of pH. A normal HCO3 range is 22 to 26 mEq/L, so a value of 14 mEq/L indicates metabolic acidosis. The low PaCO2 value (30 mm Hg) is due to the respiratory compensation mechanism that tries to restore the acid-base balance by increasing the ventilation and eliminating more CO2.

Choice D Reason: This choice is incorrect because it indicates metabolic alkalosis, not AKI. Metabolic alkalosis is a condition in which the body loses too much acid or gains too much base, resulting in a high level of bicarbonate (HCO3) and a high level of pH. A value of 30 mEq/L and 7.49 indicate metabolic alkalosis.

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Correct Answer is D

Explanation

Choice A: Eliciting the gag reﬂex is a way to assess cranial nerve IX (glossopharyngeal) and X (vagus), which are responsible for the sensation and motor function of the pharynx and larynx.

Choice B: Testing visual acuity is a way to assess cranial nerve II (optic), which is responsible for the sense of vision.

Choice C: Observing for facial symmetry is a way to assess cranial nerve VII (facial), which is responsible for the motor function of the facial muscles and the sensation of taste.

Choice D: Checking the pupillary response to light is a way to assess cranial nerve III (oculomotor), which is responsible for the motor function of most of the eye muscles, including those that control pupil size and lens shape.

A. Hypervolemia B. Metabolic alkalosis C. Low hemoglobin D. Hyperkalemia

Correct Answer is C

Explanation

Choice A Reason: This is incorrect because hypervolemia is a condition of excess ﬂuid volume in the body. A client who has an extensive burn injury is more likely to have hypovolemia, which is a condition of low ﬂuid volume, due to ﬂuid loss from the damaged skin and capillaries.

Choice B Reason: This is incorrect because metabolic alkalosis is a condition of high blood pH and high bicarbonate level. A client who has an extensive burn injury is more likely to have metabolic acidosis, which is a condition of low blood pH and low bicarbonate level, due to increased production of lactic acid and ketones from tissue hypoxia and breakdown.

Choice C Reason: This is correct because low hemoglobin is a common laboratory finding in a client who has an extensive burn injury. Hemoglobin is the protein in red blood cells that carries oxygen. A client who has an extensive burn injury may have low hemoglobin due to hemolysis, which is the destruction of red blood cells, or hemorrhage, which is the loss of blood.

Choice D Reason: This is incorrect because hyperkalemia is a condition of high blood potassium level. A client who has an extensive burn injury may have hyperkalemia in the early phase of injury, due to cell damage and potassium release, but it is usually transient and followed by hypokalemia, which is a condition of low blood potassium level, due to ﬂuid loss and potassium depletion.

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A nurse is caring for a client who has acute kidney injury (AKI). Which of the following arterial blood gas values would the nurse expect this client to have?

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Naxlex Comprehensive Predictor Exams

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