A community health nurse is performing a home visit for a client and is evaluating the home environment for safety. Which of the following findings would indicate to the nurse that the client has a proper understanding of safety in the home?

Rationale:
A. "Avoid consuming grapefruit juice while taking this medication.": Grapefruit juice inhibits the cytochrome P450 enzyme system in the liver, leading to increased serum levels of nifedipine. This can potentiate adverse effects such as hypotension, dizziness, and tachycardia.

B. "Your magnesium level will be monitored while taking this medication.": Nifedipine, a calcium channel blocker, does not significantly affect magnesium levels. Monitoring magnesium is more relevant for clients receiving magnesium sulfate.

C. "This medication can cause changes in thyroid function.": Nifedipine has no known effects on thyroid hormones or gland function. Drugs affecting thyroid function include amiodarone or lithium, not calcium channel blockers like nifedipine.

D. "This medication can cause an increase in blood glucose levels.": Nifedipine does not alter glucose metabolism. Medications such as corticosteroids and thiazide diuretics are more likely to cause hyperglycemia, whereas nifedipine’s primary effects involve smooth muscle relaxation and vasodilation.

Rationale:
A. Hold the sterile package in his dominant hand and open the top flap of the package toward his body: The top flap should be opened away from the nurse’s body to avoid reaching over and contaminating the sterile field. Opening toward the body risks touching or dropping contaminants onto the field.

B. Drop the sterile gauze from 25.4 cm (10 in) above the sterile field: Sterile items should be dropped from a minimal height, close to the field, to prevent them from bouncing, falling off, or becoming contaminated. A 10-inch drop increases the risk of contamination.

C. Place objects 1.27 cm (0.5 in) inside the border of the sterile field: The outer 1 inch (2.5 cm) of a sterile field is considered contaminated, not just 0.5 inches. Placing objects inside only 0.5 in does not guarantee sterility and may result in contamination.

D. Position the bottle outside the edge of the sterile field when pouring solution into a sterile container: Keeping the bottle outside the sterile field prevents contamination from the outside of the bottle. Only the sterile contents should enter the sterile container, maintaining the integrity of the sterile field during the dressing change.