A client is found to be allergic to Chinese food, which causes acute asthma. Which of the following instructions should the nurse give the client?

Correct Answer: C

Rationale: Rationale: Choice C is correct because avoiding Chinese food, a known trigger for the client's acute asthma, is crucial to prevent future asthma attacks. By eliminating the trigger, the client can reduce the risk of allergic reactions and asthma exacerbations. Summary: A: Incorrect. Eating Chinese food once a month still exposes the client to the trigger, increasing the risk of asthma attacks. B: Incorrect. Using inhalers before eating Chinese food may help manage symptoms temporarily but does not address the root cause of the allergic reaction. D: Incorrect. Dismissing the client's known trigger without further investigation can lead to serious health consequences.

Correct Answer: C

Rationale: Decompression sickness occurs when nitrogen bubbles form in the blood due to rapid changes in pressure during ascent. Nitrogen, a major component of air, dissolves in the blood at higher pressure and forms bubbles when pressure decreases. These bubbles can block blood vessels, leading to various symptoms. Choice A is incorrect as it pertains to hypercapnia, not decompression sickness. Choice B is incorrect as decompression sickness is not caused by lack of oxygen but rather by nitrogen bubbles. Choice D is incorrect as glucose deficiency is not related to decompression sickness. Therefore, the correct answer is C, bubbles of nitrogen in the blood.

Correct Answer: B

Rationale: The correct answer is B: Tuberculosis. BCG vaccine is specifically designed to prevent tuberculosis, which is a bacterial infection caused by Mycobacterium tuberculosis. The vaccine stimulates the immune system to provide protection against TB. Pneumonia (A), Emphysema (C), and Smallpox (D) are not targeted by the BCG vaccine. Pneumonia is usually caused by viruses or bacteria different from TB, Emphysema is a chronic lung condition unrelated to TB, and Smallpox is caused by the Variola virus, which is different from the bacteria causing TB. Therefore, the correct answer is B as BCG vaccine is used to curb tuberculosis.

Correct Answer: A

Rationale: When CO2 concentration in the blood increases, it leads to respiratory acidosis, causing the body to increase breathing rate to expel excess CO2 and restore pH balance. This increase in breathing helps eliminate CO2 through exhalation, thus the correct answer is A. Choice B is incorrect because an increase in CO2 concentration triggers an increase in breathing to remove the excess CO2, not decrease it. Choice C is incorrect because stopping breathing would be life-threatening and is not a physiological response to high CO2 levels. Choice D is incorrect because an increase in CO2 concentration does have an effect on breathing rate to maintain homeostasis.

Correct Answer: D

Rationale: The correct answer is D. Validating that informed consent has been given by the client is crucial before any invasive procedure to ensure the client understands the risks, benefits, and alternatives. It also respects the client's autonomy and right to make an informed decision. A: Measuring oxygen saturation before and after a 12-minute walk is not directly related to thoracentesis preparation. B: Verifying the client's understanding of complications is important but not the immediate priority before the procedure. C: Explaining the procedure to the client and family is essential but may not be the first step; ensuring informed consent comes before this step.