Correct Answer: D

Rationale: The correct answer is D because a normal corneal light reflex involves light being reflected at the same spot in both eyes. This indicates that both eyes are aligned properly and focusing light in the same direction. Choice A is incorrect because it refers to accommodation, not the corneal light reflex. Choice B is incorrect as convergence is related to eye movement, not the corneal light reflex. Choice C is incorrect as pupil constriction in response to light is known as the pupillary light reflex, not the corneal light reflex.

Correct Answer: D

Rationale: The correct answer is D: "Begin with the highest priority diagnoses, then select appropriate interventions." Rationale: 1. Start with the highest priority diagnoses: Prioritizing care based on the patients' most critical needs ensures their safety and well-being. 2. Identify appropriate interventions: Select interventions that directly address the priority diagnoses to promote effective care delivery. 3. Tailor interventions to individual needs: By focusing on high-priority diagnoses, the nurse can personalize care plans for each patient. 4. Ensure efficient use of resources: Addressing critical issues first optimizes time and resources for the most impactful outcomes. Summary: A: Incorrect. Performing interventions based on time needed may not address the most critical patient needs. B: Incorrect. While scientific rationale is important, it should come after identifying priority diagnoses. C: Incorrect. Setting goals and outcomes should follow the identification of high-priority diagnoses for effective care planning.

Correct Answer: B

Rationale: The correct answer is B: Use a soft toothbrush and electric razor. Patients with bone marrow depression are at increased risk of bleeding due to low platelet count. Using a soft toothbrush and electric razor helps prevent injury to the gums and skin, reducing the risk of bleeding. Choices A, C, and D are incorrect because: A: Sleeping with the head of the bed slightly elevated is not directly related to preventing bleeding in bone marrow depression. C: Drinking citrus juices may irritate the stomach lining and are not specifically indicated for preventing bleeding. D: Increasing activity level and frequent ambulation may increase the risk of injury and bleeding in a patient with bone marrow depression.

Correct Answer: B

Rationale: The correct answer is B: Reduced sneezing. Decongestants work by constricting blood vessels in the nasal passages, reducing swelling and congestion, which in turn can lead to a decrease in sneezing. Increased salivation (choice A) is not a typical effect of decongestants. Increased tearing (choice C) is more commonly associated with allergies or irritants. Headache (choice D) can be a side effect of decongestants due to their impact on blood vessels, but it does not necessarily indicate effectiveness in treating allergic rhinitis.

Correct Answer: A

Rationale: The correct answer is A: Have the patient lie flat for 6 to 8 hours after a lumbar puncture to prevent complications like post-lumbar puncture headache. Lying flat helps maintain CSF pressure and reduce the risk of leakage. B: Keeping the patient from eating or drinking for 4 hours is not necessary after a lumbar puncture. C: Monitoring pedal pulses q4h is irrelevant to post-lumbar puncture care. D: Keeping the head of the bed elevated 30 degrees for 24 hours is not recommended after a lumbar puncture as it may increase the risk of complications.