Correct Answer: B

Rationale: The priority nursing action in this situation is to evaluate the client's respiratory status. When a client with COPD on oxygen therapy experiences difficulty breathing, the nurse should first assess the client's respiratory status to determine the severity of the situation. Increasing the oxygen flow without proper assessment can be harmful if not clinically indicated. While calling emergency services may eventually be necessary, it should not be the immediate action without assessing the client first. Instructing the client to cough and clear secretions is not appropriate as the nurse needs to evaluate the respiratory status before proceeding with interventions.

Correct Answer: C

Rationale: Nitroglycerin (Nitrostat) tablets are used to relieve chest pain associated with angina. The client should take the medication at the first indication of chest pain to help dilate blood vessels and improve blood flow to the heart muscle. Choice A is incorrect because nitroglycerin should not be scheduled after each meal or at bedtime. Choice B is incorrect as taking the medication every 15 minutes during an acute attack is excessive and not recommended. Choice D is incorrect because while it is important to take nitroglycerin with water, the timing of water intake is not as critical as taking the medication at the first sign of chest pain.

Correct Answer: B

Rationale: The priority nursing action in this situation is to evaluate the client's respiratory status. When a client with COPD on oxygen therapy experiences difficulty breathing, the nurse should first assess the client's respiratory status to determine the severity of the situation. Increasing the oxygen flow without proper assessment can be harmful if not clinically indicated. While calling emergency services may eventually be necessary, it should not be the immediate action without assessing the client first. Instructing the client to cough and clear secretions is not appropriate as the nurse needs to evaluate the respiratory status before proceeding with interventions.

Correct Answer: B

Rationale: In this scenario, the client reporting unrelieved chest pain after taking a nitroglycerin tablet could be indicative of a serious cardiac event. Instructing the client to call 911 is the most appropriate response because immediate medical attention is necessary for chest pain that is not relieved by nitroglycerin. Telling the client to take an aspirin (Choice A) may not address the urgency of the situation, and aspirin might not be appropriate depending on the client's medical history. Having the client take another nitroglycerin tablet (Choice C) without relief could lead to overdosage. Advising the client to come to the office (Choice D) is not the best course of action when dealing with a potential cardiac emergency that requires immediate intervention.

Correct Answer: D

Rationale: The correct answer is D: 15-mm induration. In PPD testing, an induration (hardened raised area) of 15 mm or more is considered positive for TB in individuals with no risk factors. Choices A, B, and C are incorrect because an erythema of 4 mm, induration of 5 mm, or wheal of 10 mm are not indicative of a positive TB test result in a low-risk individual. Therefore, the interpretation of a 15-mm induration would lead the nurse to consider the test positive for TB in this case.