Before administering an antibiotic that can cause nephrotoxicity, which laboratory value is most important for the practical nurse (PN) to review?
Serum calcium
Serum creatinine
Hemoglobin and Hematocrit
White blood cell count (WBC)
The Correct Answer is B
Serum creatinine is the most important laboratory value to review before administering an antibiotic that can cause nephrotoxicity. Nephrotoxicity is an alteration in the function of the kidney due to exposure to certain drugs or toxins.
It can be assessed by measuring the glomerular filtration rate (GFR), which is the rate of clearance of a substance from the blood by the kidneys. Serum creatinine is a waste product of muscle metabolism that is freely filtered by the glomeruli and not reabsorbed or secreted by the tubules.
Therefore, it is a reliable indicator of GFR and renal function. An increase in serum creatinine indicates a decrease in GFR and renal function, which may be caused by nephrotoxic drugs.
The other laboratory values are not directly related to nephrotoxicity or GFR:
- Serum calcium: This may be affected by renal function, but it is not a sensitive or specific marker of nephrotoxicity. It may be altered by other factors such as vitamin D, parathyroid hormone, and bone metabolism.
- Hemoglobin and hematocrit: These may be affected by renal function, but they are not sensitive or specific markers of nephrotoxicity. They may reflect the erythropoietin production by the kidneys, which stimulates red blood cell production in the bone marrow. However, they may also be influenced by other factors such as blood loss, hydration status, and iron deficiency.
- White blood cell count (WBC): This is not related to nephrotoxicity or GFR. It may reflect the presence of infection or inflammation, which may be a cause or a consequence of renal impairment, but it is not a direct measure of renal function.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D","E"]
Explanation
Since the pregnant woman is vegetarian and does not eat meat, the practical nurse (PN) should provide alternative sources of iron-rich foods. Lentils and black beans are excellent vegetarian sources of iron and can be added to soups to increase iron intake (option a).
Oatmeal is a good choice for breakfast as it is often fortified with iron (option d). This can help supplement
iron intake in the diet.
Green leafy vegetables, such as spinach, kale, and broccoli, are also rich in iron and should be increased in the client's diet (option e).
Option b, which suggests eating red meat just until the anemia is resolved, is not appropriate for a vegetarian client.
Option c, taking two prenatal vitamins with iron daily, is not necessary unless specifically advised by the healthcare provider. It is important to follow the prescribed dosage of medication and supplements as directed by the healthcare provider.
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Correct Answer is A
Explanation
The correct answer is choice A. Gather the procedure tray and equipment.
Choice A rationale:
The practical nurse should gather the necessary procedure tray and equipment to ensure everything is ready for the healthcare provider to perform the thoracentesis efficiently and safely.
Choice B rationale:
Cleansing the site and covering it with a sterile towel is part of the procedure itself and should be done by the healthcare provider performing the thoracentesis.
Choice C rationale:
Keeping the patient NPO (nothing by mouth) and encouraging them to void is not necessary for a thoracentesis. This procedure typically does not require the patient to be NPO.
Choice D rationale:
Placing the patient in an orthopneic position (sitting up and leaning forward) is important for the procedure, but it should be done closer to the time of the procedure, not necessarily as a preparatory step.
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