The nurse is assigned to care for the client diagnosed with cytomegalovirus retinitis and acquired immunodeficiency syndrome (AIDS) who is receiving foscarnet. The nurse should monitor the results of...

The nurse is assigned to care for the client diagnosed with cytomegalovirus retinitis and acquired immunodeficiency syndrome (AIDS) who is receiving foscarnet. The nurse should monitor the results of which laboratory study while the client is taking this medication?

1. CD4 + cell count 2. Lymphocyte count 3. Serum albumin level 4. Serum creatinine level