Correct Answer: A

Rationale: Auscultating the entire lung region is the most appropriate action when assessing a patient for respiratory complications related to immobility. This approach helps the nurse identify any abnormalities in lung sounds, such as diminished breath sounds or the presence of secretions. Assessing the patient at regular intervals (choice B) is important but does not specifically address the respiratory assessment needed in this situation. Focusing auscultation on the upper lung fields (choice C) may miss potential issues in other areas. Inspecting chest wall movements primarily during the expiratory cycle (choice D) is not the most effective way to assess lung sounds and identify respiratory complications.

Correct Answer: A

Rationale: The correct answer is A: White blood cell count (WBC). Monitoring the white blood cell count is crucial when caring for a patient with an infection as it helps assess the body's response to the infection. An elevated white blood cell count often indicates an active infection or inflammation, while a decreasing count may signal improvement or potential complications. C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) are nonspecific markers of inflammation and not as specific to monitoring infection progression as the white blood cell count. Hemoglobin and hematocrit levels are important for assessing oxygen-carrying capacity and blood volume, but they are not the primary indicators for monitoring infection.

Correct Answer: A

Rationale: The most important instruction to provide when teaching a patient about self-administration of insulin is to rotate injection sites to prevent tissue damage. Rotating injection sites helps prevent lipodystrophy (tissue damage) and ensures proper insulin absorption. Option B is incorrect because the angle of insulin injection varies depending on the patient's body composition. Injecting at a 90-degree angle is not always necessary. Option C is not the most crucial instruction; while storing insulin in the refrigerator is important, it is not the priority when teaching self-administration. Option D is also important for maintaining consistency but is not as critical as rotating injection sites to prevent tissue damage.

Correct Answer: C

Rationale: When a surgical mask becomes moist, it loses its effectiveness as a barrier against microorganisms. Therefore, the perioperative nurse should apply a new mask. Choice A is incorrect because a moist mask should not be continued to be worn even if the nurse is comfortable. Choice B is not the best course of action as the mask should be changed immediately when it becomes moist. Choice D is also incorrect as waiting for the mask to air-dry is not recommended due to the loss of barrier effectiveness.

Correct Answer: C

Rationale: The correct answer is C because documenting bilateral radial pulses being present, 2+, and hands warm to the touch is crucial when caring for a patient in restraints. This information helps in monitoring circulation and assessing the patient's well-being. Choices A, B, and D are incorrect because they do not provide essential information related to the patient's safety and well-being while in restraints.