A nurse is discussing laboratory values associated with the renal system with a newly licensed nurse. Which of the following statements by the newly licensed nurse indicates an understanding of the values?
Creatinine levels are increased in clients who have acute kidney injury.
BUN is decreased in clients who have dehydration
Specific gravity is decreased in clients who have hypovolemia.
Potassium levels are increased in clients who have polyuria.
The Correct Answer is A
A. Creatinine levels rise in acute kidney injury due to impaired kidney function, as the kidneys are unable to effectively filter creatinine from the blood.
B. BUN (blood urea nitrogen) levels typically increase in dehydration due to reduced kidney perfusion, leading to decreased urine output and increased concentration of waste products in the blood.
C. Specific gravity increases in hypovolemia because urine becomes more concentrated as the body tries to conserve water.
D. Potassium levels may vary depending on the cause of polyuria, but polyuria itself does not necessarily cause hyperkalemia. It can be caused by various factors including diabetes insipidus or diabetes mellitus.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. In respiratory acidosis, the pH would be lower than normal due to an excess of carbon dioxide.
B. PaCO2 (partial pressure of carbon dioxide) would be elevated in respiratory acidosis because of inadequate ventilation leading to CO2 retention.
C. Potassium levels may vary depending on other factors but are not directly related to respiratory acidosis.
D. HCO3 (bicarbonate) levels may be normal or increased compensatorily in chronic respiratory acidosis, not necessarily decreased.
Correct Answer is C
Explanation
A. Respiratory acidosis typically presents with cool, clammy skin due to compensatory peripheral vasoconstriction.
B. Peripheral pulses may be weak or thready in respiratory acidosis due to decreased cardiac output.
C. Respiratory acidosis can lead to electrolyte imbalances, particularly hyperkalemia, which can manifest as widened QRS complexes on an electrocardiogram (ECG).
D. Respiratory acidosis can lead to hyperkalemia, but hyperactive deep tendon reflexes are not a characteristic finding.
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