Final answer:
The client correctly understands the teaching if they intend to change the nitroglycerin patch every 24 hours. The patch must be applied to a flat, hair-free area and the site should be rotated to prevent skin irritation.
Step-by-step explanation:
The question pertains to the education of a client on the proper placement of a nitroglycerin patch. The correct statement that indicates an understanding of the teaching is C, “I’ll change the patch every 24 hours.” Proper placement of a nitroglycerin patch is important for effective medication administration and to avoid skin irritation. The patch should be placed on a flat area of skin that is free of hair, oil, or moisture to ensure proper adhesion and drug absorption. It should not be placed on a hairy area, as hair can interfere with adhesion and drug delivery. A common misconception is putting it on the chest directly over the heart, or on a joint, which can cause the patch to move and peel off due to joint movement. Additionally, the client needs to be instructed to rotate the site of application to avoid skin irritation and to apply the patch to a different location each time.