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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Related Questions
Correct Answer is D
Explanation
A. While obesity can contribute to certain health conditions, it is not a direct risk factor for the formation of renal calculi.
B. Proteinuria may indicate kidney dysfunction, but it is not a direct risk factor for the formation of renal calculi.
C. Iron deficiency is not directly associated with an increased risk of renal calculi formation.
D. Dehydration can lead to concentrated urine, which increases the risk of crystal formation and subsequently the formation of renal calculi.
Correct Answer is B
Explanation
A. A urine output of 50 mL in 4 hours is inadequate and may indicate decreased renal perfusion. Magnesium sulfate can further compromise renal perfusion, so this finding warrants careful evaluation and potential adjustment of the infusion rate.
B. This indicates that the client is not experiencing respiratory depression, a potential side effect of magnesium sulfate toxicity.
C. Diminished deep tendon reflexes is an expected finding in magnesium sulfate toxicity.
D. A heart rate of 56/min is below the normal range for an adult but may be a common finding in clients receiving magnesium sulfate due to its cardiac depressant effects.
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