Correct Answer: A

Rationale: The appropriate nursing action for a patient experiencing an acute allergic reaction is to administer antihistamines. Antihistamines work by blocking the action of histamine, a chemical released during an allergic reaction, and can help relieve symptoms such as itching, swelling, and hives. Corticosteroids are used for severe allergic reactions not responding to antihistamines, as they have anti-inflammatory properties. Oxygen is administered in cases of respiratory distress, while bronchodilators are used for bronchospasms. However, the first-line intervention for an acute allergic reaction is antihistamines.

Correct Answer: C

Rationale: The correct answer is C. Increasing the intake of saturated fats can raise cholesterol levels, which is not recommended after a myocardial infarction. Choices A, B, and D are all appropriate statements indicating a good understanding of post-myocardial infarction care. Taking a daily aspirin can help prevent another heart attack, experiencing chest pain with exercise is a common expectation post-myocardial infarction, and participating in a cardiac rehabilitation program is important for recovery and improving heart health.

Correct Answer: B

Rationale: The correct answer is B: PT/INR. When a patient is on warfarin therapy, healthcare providers monitor the PT/INR levels to evaluate the effectiveness of the treatment and assess the risk of bleeding. Monitoring potassium, sodium, or calcium levels is not directly related to warfarin therapy and would not provide the necessary information needed to manage the medication effectively.

Correct Answer: C

Rationale: Applying sequential compression devices is the appropriate intervention for a client at risk for developing deep vein thrombosis (DVT). This intervention helps prevent venous stasis by promoting circulation in the lower extremities, reducing the risk of DVT. Massaging the client's legs every 4 hours is contraindicated as it can dislodge a blood clot and increase the risk of embolism. Administering prophylactic antibiotics is not indicated for preventing DVT. Encouraging the client to remain on bed rest can contribute to venous stasis and increase the risk of developing DVT.

Correct Answer: A

Rationale: Corrected Rationale: Daily weight monitoring is the most accurate way to assess fluid balance in patients receiving diuretics. Monitoring daily weight allows healthcare providers to track changes in fluid status more precisely. While monitoring intake and output (choice B) is essential, it may not provide a comprehensive picture of overall fluid balance. Monitoring blood pressure (choice C) is important but may not directly reflect fluid balance. Checking for edema (choice D) is useful but may not be as sensitive as daily weight monitoring in assessing fluid balance.