Correct Answer: A

Rationale: The correct answer is A. Children with varicella are contagious until the vesicles crust over, which is important for preventing transmission. Choice B is incorrect as varicella and herpes zoster are caused by different viruses, so the varicella vaccine is given to prevent varicella, not herpes zoster. Choice C is incorrect because varicella is primarily spread through respiratory secretions, so airborne precautions are recommended, not droplet precautions. Choice D is incorrect as children with varicella are contagious even before the first vesicle eruption, not just 4 days before.

Correct Answer: B

Rationale: The correct answer is B. Client-reported improvement in anxiety is an indication of effective treatment for pulmonary embolism. Choice A is incorrect as increased density in all lung fields on a chest x-ray may indicate complications or lack of improvement. Choice C is incorrect as diminished breath sounds auscultated unilaterally may suggest a localized lung issue and not necessarily reflect the effectiveness of treatment for a pulmonary embolism. Choice D is incorrect as the ABG results provided do not specifically indicate the effectiveness of treatment for a pulmonary embolism.

Correct Answer: B

Rationale: The correct answer is B: 'I should increase my intake of vitamin D.' Adequate vitamin D intake is crucial for calcium absorption, which is essential for bone health and preventing osteoporosis. Avoiding weight-bearing exercises (choice A) would be detrimental as weight-bearing activities help improve bone density. Reducing dairy intake (choice C) is not recommended as dairy products are a good source of calcium. While increasing calcium intake (choice D) is important, ensuring sufficient vitamin D levels for proper absorption is equally crucial for bone health.

Correct Answer: A

Rationale: The correct answer is A: Creatinine. Gentamicin can cause nephrotoxicity, leading to impaired kidney function. Monitoring creatinine levels helps the nurse detect any potential kidney damage. Choice B, Aspartate aminotransferase (AST), is not typically affected by gentamicin. Choice C, White blood cell count, is not directly related to gentamicin adverse effects. Choice D, Serum glucose, is not specifically monitored for gentamicin adverse effects.

Correct Answer: C

Rationale: The correct action the nurse should include in the plan of care for a client receiving hemodialysis is to check the vascular access site for bleeding after dialysis. This is crucial to detect any bleeding complications and ensure prompt intervention if necessary. Withholding all medications until after dialysis (Choice A) is not appropriate as some medications may need to be administered during dialysis. Rehydrating with dextrose 5% in water for orthostatic hypotension (Choice B) is not directly related to the immediate post-dialysis care. Giving an antibiotic 30 minutes before dialysis (Choice D) is not recommended as timing of medication administration should be based on the specific antibiotic and its pharmacokinetics.