A nurse is providing teaching to a client who is postoperative following a mastectomy of the left breast with axillary lymph node dissection. Which of the following exercises should the nurse instruct the client to start on the first postoperative day?

Choice A rationale:
(Potassium level) Lovastatin is a medication used to treat high cholesterol levels. While potassium levels are important to monitor for certain conditions, they are not directly related to the initiation of lovastatin therapy. Therefore, this is not the correct choice for diagnostic testing before starting the medication.
Choice B rationale:
(Hemoglobin level) Hemoglobin levels are important to assess for anemia or other blood disorders. However, they are not specifically required before starting lovastatin therapy. Therefore, this is not the correct choice for diagnostic testing before starting the medication.
Choice C rationale:
(Kidney function tests) While kidney function tests are essential for many medications to ensure proper excretion and avoid toxicity, they are not directly related to the initiation of lovastatin therapy. Therefore, this is not the correct choice for diagnostic testing before starting the medication.
Choice D rationale:
(Liver function tests) Liver function tests are crucial before starting lovastatin therapy. Lovastatin is metabolized in the liver, and it can potentially cause liver damage or abnormalities in liver enzymes. Monitoring liver function helps detect any pre-existing liver conditions and ensures the safe use of the medication. Therefore, this is the correct choice for diagnostic testing before starting the medication.

Choice A rationale:
Properly cutting the opening on the skin barrier wafer to fit over the stoma is crucial to prevent any irritation or damage to the surrounding skin. A well-fitted wafer creates a seal around the stoma, reducing the risk of stool coming into contact with the skin, which can cause excoriation.
Choice B rationale:
Emptying the bag when it is three-fourths full of stool is unrelated to the education on colostomy care. This information was provided in the previous question () and is not relevant to colostomy care education.
Choice C rationale:
The color of the stoma should not be slightly purple. A healthy stoma should be pink or red, indicating a good blood supply. A purple or dark-colored stoma could indicate inadequate blood flow, which is a concern and requires immediate medical attention.
Choice D rationale:
Cleansing the peristomal skin with moisturizing soap and water is not the recommended approach. The nurse should use plain water or mild, non-moisturizing soap to clean the peristomal skin, as moisturizing soap may leave a residue that affects the adhesion of the skin barrier wafer.