HESI CAT Exam

Correct Answer: A

Rationale: The correct answer is A: Inflammation of the mucous membrane & bronchospasm. Acute asthma episodes are primarily caused by inflammation of the airways and bronchospasm, which lead to airway obstruction. Increased mucus production and bronchoconstriction (Choice B) are part of the physiological responses in asthma but do not directly cause acute episodes. Allergic reactions and hyperventilation (Choice C) are related to asthma triggers and responses but are not the direct causes of acute episodes. Airway narrowing and decreased lung capacity (Choice D) are consequences of inflammation and bronchospasm but do not explain the physiological response leading to acute asthma episodes.

Correct Answer: A

Rationale: The best way to evaluate the effectiveness of a new fall prevention protocol is by comparing the number of falls that occurred before and after its implementation. This direct comparison helps in assessing the impact of the protocol on reducing fall rates. Choices B, C, and D do not directly measure the effectiveness of the protocol. Analyzing costs incurred (Choice B), conducting a chart review (Choice C), or consulting with a physical therapist (Choice D) may provide valuable information but do not specifically evaluate the protocol's effectiveness in preventing falls.

Correct Answer: C

Rationale: Thiamine supplementation is critical in preventing Wernicke's syndrome, especially in clients with chronic alcohol use. Wernicke's syndrome is a neurological disorder caused by thiamine deficiency. Lorazepam is a benzodiazepine used for anxiety and not for preventing Wernicke's syndrome. Famotidine is an H2 blocker used to reduce stomach acid production but does not prevent Wernicke's syndrome. Atenolol is a beta-blocker used for hypertension and angina, not for preventing Wernicke's syndrome.

Correct Answer: C

Rationale: Vomiting is a common sign of digitalis toxicity and should be closely monitored. While tachycardia is a common sign of heart failure, it is not typically associated with digitalis toxicity (Choice A). Dyspnea (Choice B) and muscle cramps (Choice D) are not specific signs of digitalis toxicity and can be present in other conditions. Therefore, the presence of vomiting should raise concerns about digitalis toxicity in the child with heart failure.

Correct Answer: D

Rationale: Administering a prescribed diuretic is the most important intervention in this scenario as the client is presenting signs of fluid overload and heart failure. Diuretics help reduce fluid retention in the body, alleviating symptoms like edema and crackles. Restricting fluid intake may be necessary in some cases, but in this acute situation, addressing the immediate fluid overload with a diuretic takes precedence. Weighing the client daily and maintaining accurate intake and output are important aspects of monitoring, but they do not directly address the urgent need to manage fluid overload.