Correct Answer: B

Rationale: The correct answer is B. Petroleum jelly is flammable and should not be used with oxygen therapy due to the risk of fire. The client should avoid using petroleum-based products around oxygen equipment. Choices A, C, and D are all appropriate statements for a client with COPD receiving home oxygen therapy. Keeping the oxygen tank upright ensures proper oxygen flow, avoiding smoking or exposure to smoke helps prevent respiratory aggravation, and knowing to seek medical help promptly for breathing difficulties is essential for managing COPD effectively.

Correct Answer: B

Rationale: The correct action in this scenario is to disconnect the electronic blood pressure machine and measure the client's blood pressure manually every 15 minutes. Given that the machine is malfunctioning and providing inconsistent readings, relying on manual measurements ensures accuracy and maintains the quality of care. Notifying the manufacturer (Choice A) may be necessary in the long run, but the immediate concern is the accuracy of the vital signs. Adjusting the machine settings again (Choice C) without resolving the underlying issue would not address the problem. Ignoring the extra readings (Choice D) could lead to incorrect assessment and compromise patient care. Therefore, the best course of action is to disconnect the machine and opt for manual blood pressure measurements until the issue is resolved.

Correct Answer: B

Rationale: In providing a complete bed bath using a bag bath for an unconscious patient, the nurse should follow a specific order. The correct sequence is as follows: Neck, shoulders, and chest; Both arms, both hands, web spaces, and axilla; Abdomen and then groin/perineum; Right leg, right foot, and web spaces; Left leg, left foot, and web spaces; Back of neck, back, and then buttocks. Choice A is incorrect as it does not follow the correct sequence for a bed bath. Choice C is incorrect as it focuses on the lower extremities before addressing the upper body. Choice D is incorrect as it starts with the back of the patient instead of the upper body areas first.

Correct Answer: B

Rationale: The presence of a non-blanching red area over the client's trochanter is a concerning finding as it indicates possible pressure ulcer formation. This finding necessitates an increase in the frequency of position changes to prevent skin breakdown. Choices A, C, and D do not directly correlate with the need for increased position changes. A flat rash, ecchymosis, and petechiae may have different causes and would not be addressed by changing the client's position more frequently.

Correct Answer: B

Rationale: Depressed clients are at the highest risk of attempting suicide 7 to 14 days after starting antidepressant medication and psychotherapy. During this time, they may start to regain energy but still feel hopeless, which can increase the risk of suicidal ideation and behavior. Choices A, C, and D are incorrect because immediate post-admission, after an angry outburst with family, or when removed from a security room are not specific periods known to be associated with the highest risk of suicide in depressed clients.