Correct Answer: B

Rationale: The correct answer is B: Prothrombin time (PT) and International Normalized Ratio (INR). These lab values are crucial for monitoring the effectiveness of warfarin, an anticoagulant medication. PT measures the time it takes for blood to clot, while INR standardizes these results. Ensuring the client's PT/INR levels are within the therapeutic range is essential to prevent clotting or excessive bleeding. Choices A, C, and D are incorrect as they are not directly related to monitoring warfarin therapy in a client with atrial fibrillation.

Correct Answer: B

Rationale: The correct recommendation for a client with dry, peeling skin at a radiation therapy treatment site is to use mild soap and water to cleanse the area. This approach helps in preventing skin irritation and reduces the risk of infection. Applying lotion (Choice A) may further irritate the skin due to the chemicals present in the lotion. Covering the area with a sterile dressing (Choice C) is not necessary unless there is an open wound that needs protection. Allowing the skin to air dry after washing (Choice D) may lead to further dryness and peeling.

Correct Answer: A

Rationale: Administering a bronchodilator is the priority intervention to open the airways and relieve wheezing and shortness of breath. Bronchodilators work quickly to dilate the airways, making it easier for the client to breathe. Checking oxygen saturation is important but can be done after initiating bronchodilator therapy. Encouraging pursed-lip breathing and elevating the head of the bed can help improve breathing patterns but should follow the administration of the bronchodilator.

Correct Answer: C

Rationale: The correct answer is to advise the client to apply ice to the breasts for comfort. Applying ice can help reduce swelling and discomfort associated with engorgement in a woman who is not breastfeeding. Expressing milk manually would stimulate further milk production, which is not desired in this case. Wearing a tight bra could increase discomfort by putting pressure on the engorged breasts. Warm showers may actually increase swelling due to the vasodilation effect of heat.

Correct Answer: D

Rationale: The correct answer is D: 'Use sunscreen to prevent photosensitivity.' Methotrexate increases photosensitivity, so clients should be advised to use sunscreen to protect their skin from sun exposure. Choice A is incorrect because methotrexate is usually taken with food to reduce gastrointestinal side effects. Choice B may be important but is not specific to methotrexate therapy. Choice C is also important, but the primary reason for folic acid supplementation with methotrexate is to reduce the risk of certain side effects like anemia rather than preventing anemia itself.