Question

A client with a documented exposure to tuberculosis is on medication therapy with isoniazid. The nurse is monitoring laboratory results and determines that which laboratory value indicates the need for follow-up?

1) Platelet count 325,000 mm³ (325 × 109/L)
2) Serum creatinine 1.0 mg/dL (88.3 mcmol/L)
3) Blood urea nitrogen (BUN) 20 mg/dL (7.1 mmol/L)
4) Aspartate aminotransferase (AST) 55 U/L (55 U/L)

Answer 1

The nurse should monitor the blood urea nitrogen (BUN) level to determine the need for follow-up in a client with tuberculosis on isoniazid therapy.

Step-by-step explanation:

The nurse should monitor the blood urea nitrogen (BUN) level to determine the need for follow-up in a client with a documented exposure to tuberculosis on isoniazid medication therapy.

A normal range for BUN is 8-20 mg/dL. If the BUN level is outside of this range, it may indicate impaired kidney function and require further evaluation.