Correct Answer: C

Rationale: Corrected Rationale: Serum phenytoin levels should be regularly monitored to prevent toxicity because the therapeutic range is narrow. Monitoring blood pressure (choice A), complete blood count (choice B), and liver function tests (choice D) are not directly related to preventing phenytoin toxicity.

Correct Answer: B

Rationale: The correct answer is to monitor blood glucose levels before administration. This step is crucial to ensure the correct dose of insulin is administered based on the current blood glucose level. Choice A is incorrect as insulin usually needs to be stored in the refrigerator and has an expiration date. Choice C is incorrect because insulin can be short-acting, rapid-acting, intermediate-acting, or long-acting. Choice D is also incorrect as insulin can have side effects such as hypoglycemia if the dose is too high.

Correct Answer: B

Rationale: In this scenario, the correct actions for the nurse to take involve ensuring patient safety and fall prevention measures. Choice B is the correct answer because instructing the patient to use the call light allows them to signal for help, applying an ambulation alarm helps detect movement, and checking on the patient hourly increases monitoring frequency. These actions are essential for preventing falls in a disoriented patient with a history of falls. Choices A, C, and D are incorrect: A does not provide adequate monitoring or fall prevention measures, C relies solely on assigning a sitter without utilizing technological aids, and D lacks continuous monitoring and specific fall prevention strategies.

Correct Answer: B

Rationale: The correct answer is B: Macule. A macule is a non-palpable skin lesion smaller than 1 cm in diameter. In this case, the skin lesion described is less than 0.5 cm, making it consistent with a macule. Vesicle (choice A) is a small blister filled with clear fluid, papule (choice C) is a solid, raised skin lesion less than 0.5 cm in diameter, and nodule (choice D) is a palpable, solid lesion larger than 0.5 cm in diameter. Therefore, choices A, C, and D describe skin lesions that do not match the characteristics of the lesion presented in the question.

Correct Answer: B

Rationale: The correct teaching point for a client with hearing loss who has been fitted for a hearing aid is to use mild soap and water to clean the ear mold. It is important to keep the ear mold clean to prevent infections and maintain proper functioning. Choice A is incorrect because using the highest setting can lead to discomfort and may not be necessary for all situations. Choice C is incorrect as the hearing aid should generally be turned off when not in use, not just during sleep, to conserve battery life. Choice D is incorrect as immersing the hearing aid in saline solution can damage the device; it should be kept dry to prevent malfunction.