Final answer:
The nurse should identify that the statement 2) I should remove the patch before taking a shower indicates an understanding of the teaching.
Step-by-step explanation:
When teaching about self administration of transdermal medication, it is important to ensure that the patient understands the correct method for applying the medication. In the case of nitroglycerin patches, the nurse should advise the client to apply the patch to clean, dry skin in an area that is flat and free from excess hair.
The nurse should identify that the statement 2) I should remove the patch before taking a shower indicates an understanding of the teaching. Transdermal medications, such as nitroglycerin patches, should typically be removed before taking a shower or bathing to prevent the patch from getting wet or detached. This ensures that the medication is properly absorbed by the skin.
Hence, the answer is option 2.