A nurse is assessing a client suspected of having leukemia. Which laboratory test is a definitive diagnostic tool to confirm leukemia?

A) This choice is incorrect because a complete blood count (CBC) provides information about the number of blood cells, but it does not directly assess the bone marrow for leukemia.

B) This choice is correct. Bone marrow aspiration and biopsy involve the collection of bone marrow samples from the sternum or hip bone. These samples are then analyzed to determine the presence of leukemia cells, assess cell morphology, and determine the type of leukemia.

C) This choice is incorrect because flow cytometry analysis is used to identify specific markers on the surface of cells and can aid in diagnosing and classifying leukemia. However, it is not the primary test used to assess the bone marrow directly.

D) This choice is incorrect because magnetic resonance imaging (MRI) is not commonly used to assess bone marrow in the diagnostic evaluation of leukemia.

A) This choice is incorrect because while aerobic exercise is beneficial for overall health, it may not directly protect the client from infection in the context of low WBC count during chemotherapy.

B) This choice is incorrect because during chemotherapy, live vaccines should be avoided as they can pose a risk to immunocompromised clients with low WBC counts.

C) This choice is correct. Placing the client in a private room with negative pressure helps reduce the risk of exposure to infectious agents, especially in immunocompromised clients with low WBC counts who are at higher risk of infection.

D) This choice is incorrect because limiting the number of healthcare providers entering the client's room may be beneficial to reduce the risk of exposure to potential infections, but placing the client in a private room with negative pressure is a more comprehensive measure.