A nurse is obtaining informed consent from a client who is preoperative. Which of the following actions should the nurse take? (Select all that apply.)

A. Hemoglobin levels are important for assessing oxygen-carrying capacity of the blood. While anemia can affect tissue oxygenation and exacerbate symptoms in heart failure, it is not directly related to the risk of digoxin toxicity.
B. Creatinine levels are used to assess kidney function. Impaired kidney function can affect the clearance of digoxin from the body, potentially increasing the risk of toxicity. However, potassium levels have a more direct impact on the risk of digoxin toxicity.
C. BUN levels are also used to assess kidney function. Similar to creatinine, impaired kidney function can affect digoxin clearance, but potassium levels are more directly related to the risk of digoxin toxicity.
D. Potassium levels are critical because hypokalemia (low potassium) can predispose the client to digoxin toxicity. Digoxin competes with potassium for binding sites on the sodium-potassium ATPase pump in cardiac cells. When potassium levels are low, digoxin can bind more readily to these pumps, leading to increased toxicity and potentially life-threatening arrhythmias such as ventricular tachycardia or ventricular fibrillation.

A. A back massage (A) can be soothing and may help with circulation, but it's not typically a priority immediately postoperative.
B. Teaching relaxation techniques such as deep breathing exercises, guided imagery, or progressive muscle relaxation can help the client manage pain, reduce anxiety, and promote faster recovery. These techniques empower the client to actively participate in their comfort and recovery process.

C. Postoperative clients are at risk of developing respiratory complications such as atelectasis (partial lung collapse) due to shallow breathing. Coughing and deep breathing exercises help to expand lung volume, clear secretions, and prevent respiratory complications. It's important to encourage and assist the client in performing these exercises regularly.
D. Encouraging the client to turn every 4 hours helps prevent pressure ulcers and promotes good circulation, but turning might be more frequent depending on the surgery and the client's condition.
E. Pain management is crucial for postoperative comfort and recovery. Administering analgesics as needed helps to control pain effectively, which is essential for the client to participate in activities such as deep breathing, coughing, and moving, thereby reducing the risk of complications.