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

Answer and Explanation

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.

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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.

A. Provide a urine sample to determine therapeutic levels of the medication B. Take the medication at the same time every day C. Watch for bleeding gums when taking the medication D. Consider taking an antacid when on this medication

Correct Answer is B

Explanation

Choice A rationale:
Providing a urine sample to determine therapeutic levels of phenytoin is not typically a part of routine discharge instructions. While monitoring of phenytoin levels is important, it's usually done through blood tests, and the frequency of testing is determined by the healthcare provider based on individual patient factors.

Choice C rationale:
Bleeding gums are not a common side effect of phenytoin. While some individuals might experience gum tenderness or overgrowth, significant bleeding is not expected.

Choice D rationale:
Antacids can actually interfere with the absorption of phenytoin, potentially reducing its effectiveness. Therefore, it's generally not recommended to take antacids regularly while on phenytoin therapy. If a patient needs to take an antacid for occasional heartburn or indigestion, it's best to take it at least 2 hours before or after the phenytoin dose.

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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?

Nursing Test Bank

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Correct Answer is A

Explanation

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