Final answer:
A bone marrow biopsy involves taking a sample of the bone marrow for further examination. It can often be performed after an aspiration and can provide enough tissue for diagnosis, reducing the need for additional procedures. The client may feel a pressure sensation during the biopsy, but should not feel actual pain.
Step-by-step explanation:
The nurse should explain to the client with Hodgkin's disease that a bone marrow biopsy involves taking a sample of the bone marrow for further examination. The biopsy may be performed after the aspiration because it can provide enough tissue for diagnosis, reducing the need for additional procedures. The nurse should also inform the client that during the biopsy, they may feel a pressure sensation, but should not feel actual pain. If the client experiences pain, they should inform the doctor to receive additional numbing medicine.