A nurse is reviewing laboratory values for a client who has systemic lupus erythematosus (SLE). Which of the following values should give the nurse the best indication of the client's renal function?
Serum creatinine
Serum sodium
Blood urea nitrogen (BUN)
Urine-specific gravity
The Correct Answer is A
Choice A rationale:
Serum creatinine is a waste product that is produced by muscle metabolism and is normally excreted by the kidneys.
When kidney function is impaired, creatinine levels in the blood increase, making it a sensitive and specific indicator of renal function.
It is considered one of the most reliable markers for assessing kidney function and is routinely used to screen for and monitor kidney disease.
Choice B rationale:
Serum sodium is an electrolyte that is regulated by the kidneys, but it is not a direct measure of renal function. Sodium levels can be affected by various factors, including fluid intake, medications, and hormonal imbalances.
While abnormal sodium levels can sometimes be a sign of kidney dysfunction, they can also occur due to other conditions, making it less specific as an indicator of renal function.
Choice C rationale:
Blood urea nitrogen (BUN) is another waste product that is produced by the breakdown of proteins and is normally excreted by the kidneys.
However, BUN levels can be influenced by factors other than kidney function, such as dietary protein intake, dehydration, and gastrointestinal bleeding.
This makes BUN less specific than serum creatinine as a marker of renal function.
Choice D rationale:
Urine-specific gravity measures the concentration of solutes in urine, which can provide some information about kidney function.
However, it is not as sensitive or specific as serum creatinine.
Urine-specific gravity can be affected by factors such as fluid intake and hydration status, which can make it less reliable as an indicator of renal function.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Losing 2 pounds in 2 weeks is not a significant weight loss and may not be a cause for concern in this context. It's important to monitor weight trends over time, but this isolated statement doesn't necessarily require immediate discussion.
Choice B rationale:
Engaging in physical activity like swimming is generally beneficial for individuals with rheumatoid arthritis. It can help improve joint mobility, reduce pain, and enhance overall well-being. The nurse might encourage the client to discuss any specific concerns or limitations with their healthcare provider, but the activity itself is not alarming.
Choice C rationale:
Taking an antibiotic concurrently with naproxen can potentially increase the risk of adverse effects. Some antibiotics, like those in the fluoroquinolone class (e.g., ciprofloxacin, levofloxacin), can interact with naproxen and increase the risk of tendonitis or tendon rupture. This interaction warrants further discussion to ensure the client is aware of potential risks and to explore alternative medications if necessary.
Choice D rationale:
Using applesauce to facilitate medication intake is a common and acceptable practice. It does not affect the absorption or efficacy of naproxen.
Correct Answer is A
Explanation
The correct answer is A. Exercise.
Choice A: Exercise Exercise is generally beneficial for overall health and is not typically a factor that exacerbates systemic lupus erythematosus (SLE). In fact, regular physical activity can be an important part of the overall treatment plan for individuals with SLE. It can boost energy levels, improve joint flexibility, and help alleviate stress. Therefore, if a patient with SLE identifies exercise as a factor that can exacerbate their condition, it indicates a need for further teaching.
Choice B: Diet Certain diets can potentially trigger or worsen SLE symptoms. For instance, a chemical found in alfalfa may trigger lupus symptoms, so patients may want to avoid eating alfalfa sprouts or taking supplements with alfalfa. Therefore, diet is a correct factor that can exacerbate SLE.
Choice C: Sunlight Exposure to sunlight can trigger or worsen SLE symptoms. For those with lupus, being in the sun can lead to symptoms like skin rashes, itching, burning, joint pain, weakness, and fatigue. In certain cases, it can also result in damage to internal organs. Therefore, sunlight is a correct factor that can exacerbate SLE.
Choice D: Infection Infections can trigger or worsen SLE symptoms. Rates of infections are higher among persons with SLE compared with the general population. Therefore, infection is a correct factor that can exacerbate SLE.
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