A nurse is caring for a client receiving an intermittent IV bolus of gentamicin twice daily. Which of the following laboratory values should the nurse monitor while the client is receiving this medication? (Select all that apply.)

A. "Glucose": Gentamicin does not significantly affect blood glucose levels, so monitoring glucose is not necessary unless the client has a known issue with diabetes or other conditions that could affect glucose levels. B. "Prothrombin time": Gentamicin does not directly affect clotting factors or prothrombin time. Monitoring prothrombin time is more relevant for anticoagulant therapy, not for aminoglycosides like gentamicin. C. "Serum creatinine": Gentamicin is an aminoglycoside that can be nephrotoxic. Monitoring serum creatinine levels is essential to assess kidney function and detect any early signs of renal damage or toxicity caused by the medication. D. "Cardiac enzymes": Cardiac enzymes are used to detect myocardial injury, and gentamicin is not typically associated with heart damage. Therefore, cardiac enzymes are not a necessary monitoring parameter for this medication. E. "WBC count": Gentamicin can increase the risk of infection due to its potential to cause neutropenia, especially when used for prolonged periods. Monitoring the WBC count is important to assess for any signs of infection or blood dyscrasias.