Correct Answer: A

Rationale: The correct answer is to administer epinephrine. Epinephrine is the first-line treatment for a severe allergic reaction as it helps to constrict blood vessels, increase heart rate, and open airways, thereby improving breathing and circulation. Discontinuing the medication may not be sufficient to manage a severe allergic reaction as the allergen is already in the patient's system. Corticosteroids and antihistamines can be considered as complementary treatments but are not the primary immediate intervention required for a severe allergic reaction.

Correct Answer: C

Rationale: Albuterol is a short-acting beta-agonist bronchodilator used to quickly relieve bronchospasm in clients with asthma who are experiencing wheezing. Fluticasone is an inhaled corticosteroid used for long-term control of asthma symptoms and not for acute wheezing. Montelukast is a leukotriene receptor antagonist used for long-term asthma management, not for immediate relief of wheezing. Ipratropium is an anticholinergic bronchodilator used for chronic obstructive pulmonary disease (COPD) and not typically used as the first-line treatment for asthma exacerbation.

Correct Answer: C

Rationale: The correct action the nurse should implement is to apply sequential compression devices to the client's legs. This intervention helps prevent venous stasis and reduce the risk of deep vein thrombosis (DVT). Massaging the client's legs may dislodge a clot and is contraindicated in this situation (choice A). Encouraging bed rest may increase the risk of DVT due to prolonged immobility (choice B). While administering anticoagulants is a common treatment for DVT, in this case, the question is about preventive measures, and using sequential compression devices is a non-pharmacological approach.

Correct Answer: A

Rationale: The correct initial action for a patient with chest pain is to administer oxygen. Chest pain can be caused by insufficient oxygenation, and providing oxygen helps alleviate the pain by increasing oxygen levels in the blood. Administering nitroglycerin or morphine may be appropriate based on the underlying cause of the chest pain, but oxygen should be given first to ensure the patient's oxygen supply is adequate. Surgery is not typically the initial intervention for chest pain.

Correct Answer: C

Rationale: Elevated serum creatinine levels indicate impaired kidney function. As kidney disease progresses, the kidneys are less able to filter waste products, leading to an increase in creatinine levels. Therefore, a high serum creatinine level of 2.5 mg/dL should be reported to the provider for further evaluation and management. Choices A, B, and D are within normal ranges and do not directly signify worsening kidney function in this context.