A nurse is caring for a patient with rheumatoid arthritis. The patient is prescribed hydroxychloroquine to slow the progression of the disease. Which of the following laboratory results should the nurse monitor for this patient?

To calculate the total output for the client, we need to add up all the individual outputs:

• The client voided 400 mL at 1100.
• The client voided 350 mL at 1430.
• The closed chest drainage system increased from 155 mL to 175 mL, which is an increase of 20 mL.
• The NG tube has 575 mL in the drainage container.
• The Jackson-Pratt drainage tube has 25 mL.

Adding all these amounts together, the total output that the nurse should record in the medical record is 1370 mL.

Here’s the calculation:

400 mL + 350 mL + (175 mL - 155 mL) + 575 mL + 25 mL = 1370 mL400mL+350mL+(175mL−155mL)+575mL+25mL=1370mL

So, the nurse should record a total output of 1370 mL in the medical record for the client.

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.