The nurse obtains the following arterial blood gas results on a client: pH 7.2, PaO2 88 mmHg, PaCO2 40 mmHg, HCO3 19 mEq/L. Which acid-base imbalance is the client experiencing?

Choice A reason: This is not the best nursing action. Documenting the pulse rate and administering the medications as prescribed may be harmful to the client. Atenolol and diltiazem are both medications that lower the blood pressure and the heart rate. Atenolol is a beta blocker that blocks the effects of adrenaline on the heart and blood vessels. Diltiazem is a calcium channel blocker that relaxes the muscles of the heart and blood vessels. Giving both medications to a client who already has a low and irregular heart rate may cause further bradycardia, which is a heart rate below 60 beats/minute, or arrhythmia, which is an abnormal heart rhythm. The nurse should check the parameters and the contraindications for the medications before administering them.

Choice B reason: This is not the best nursing action. Assessing for chest pain and administering atenolol if pain free may not be appropriate for the client. Chest pain can be a sign of angina or myocardial infarction, which are conditions where the blood flow to the heart is reduced or blocked. Atenolol can help relieve chest pain by reducing the oxygen demand of the heart, but it can also lower the heart rate and the blood pressure. The client already has a low and irregular heart rate, which may indicate a problem with the electrical conduction of the heart. The nurse should not give atenolol without checking the pulse rate and the blood pressure, and consulting the health care provider.

Choice C reason: This is the best nursing action. Holding the atenolol and administering the diltiazem is the most appropriate for the client. Atenolol can lower the heart rate and the blood pressure, which may worsen the client's condition. The nurse should hold the atenolol and notify the health care provider of the client's pulse rate and rhythm. Diltiazem can also lower the heart rate and the blood pressure, but it can also help regulate the heart rhythm by slowing down the electrical impulses in the heart. The nurse should administer the diltiazem as prescribed, and monitor the client's vital signs and cardiac status.

Choice D reason: This is not the best nursing action. Withholding the medications and reassessing the heart rate in 30 minutes may delay the treatment and the care of the client. The client has a low and irregular heart rate, which may indicate a serious cardiac problem that needs immediate attention. The nurse should not wait for 30 minutes to reassess the heart rate, but rather act promptly and notify the health care provider. The nurse should also administer the diltiazem as prescribed, unless there is a specific reason to withhold it.

Choice A reason: Preparing for endotracheal intubation and ventilatory support is not the action that the nurse should take for a client with thyroid storm. This intervention is indicated for clients with respiratory failure or impending airway obstruction, which are not the case for this client.

Choice B reason: Providing continuous sedation for pain relief is not the action that the nurse should take for a client with thyroid storm. This intervention may worsen the client's condition by suppressing the respiratory drive and lowering the blood pressure. The nurse should administer antithyroid medications, beta blockers, and corticosteroids as prescribed to reduce the thyroid hormone levels and the associated symptoms.

Choice C reason: Initiating cardiac monitoring and assessing for reflex bradycardia is not the action that the nurse should take for a client with thyroid storm. This intervention is indicated for clients with hyperkalemia or digoxin toxicity, which are not the case for this client. The nurse should monitor the client's heart rate and rhythm, but not expect a reflex bradycardia, which is a paradoxical slowing of the heart rate in response to a rapid rise in blood pressure.

Choice D reason: Maintaining IV fluid infusion and assessing adequacy of hydration is the action that the nurse should take for a client with thyroid storm. This intervention is indicated for clients with thyroid storm, as they are at risk of dehydration and electrolyte imbalance due to increased metabolic rate, fever, sweating, vomiting, and diarrhea. The nurse should administer isotonic fluids, such as normal saline, and monitor the client's fluid intake and output, urine specific gravity, and serum electrolytes.