A nurse is caring for a client who has contact dermatitis after exposure to poison ivy. The nurse recognizes that this condition is mediated by what type of cells?

Choice A reason:

This is an incorrect answer because cardiogenic shock is a severe form of heart failure that occurs when the heart cannot pump enough blood to maintain adequate tissue perfusion and oxygenation, resulting in hypotension, tachycardia, oliguria, altered mental status, and cold and clammy skin.

Choice B reason:

This is an incorrect answer because pulmonary embolism is a condition in which a blood clot travels to the lungs and blocks one or more pulmonary arteries, causing sudden dyspnea, chest pain, hemoptysis, tachypnea, and hypoxia.

Choice C reason:

This is a correct answer because right-sided heart failure occurs when the right ventricle of the heart fails to pump blood effectively to the lungs, causing blood to back up in the systemic circulation and leading to fluid accumulation in the lungs, neck veins, and extremities.

Choice D reason:

This is an incorrect answer because left-sided heart failure occurs when the left ventricle of the heart fails to pump blood effectively to the body, causing blood to back up in the pulmonary circulation and leading to pulmonary congestion, dyspnea, orthopnea, coughing, and fatigue.

Choice A reason:

Administering antiemetics as prescribed is an intervention that the nurse should implement for a client who has metabolic alkalosis due to prolonged vomiting. Antiemetics are medications that can prevent or treat nausea and vomiting, which are the main causes of metabolic alkalosis in this case. By stopping vomiting, antiemetics can help prevent further loss of gastric acid and bicarbonate retention, which can correct metabolic alkalosis.

Choice B reason:

Monitoring serum potassium levels is an intervention that the nurse should implement for a client who has metabolic alkalosis due to prolonged vomiting. Metabolic alkalosis can cause hypokalemia due to increased renal excretion of potassium and intracellular shift of potassium in exchange for hydrogen ions. Hypokalemia can worsen metabolic alkalosis by impairing renal acid excretion and increasing bicarbonate reabsorption. The nurse should monitor serum potassium levels regularly and report any abnormalities or signs of hypokalemia, such as muscle weakness, cramps, arrhythmias, or ECG changes.

Choice C reason:

Administering sodium bicarbonate IV as prescribed is not an intervention that the nurse should implement for a client who has metabolic alkalosis due to prolonged vomiting. Sodium bicarbonate is an alkalinizing agent that can increase serum bicarbonate levels and pH, which can worsen metabolic alkalosis. Sodium bicarbonate IV should be avoided or used with caution in clients who have metabolic alkalosis, unless they have severe acid-base imbalance or coexisting metabolic acidosis.

Choice D reason:

Encouraging intake of acidic foods and beverages is not an intervention that the nurse should implement for a client who has metabolic alkalosis due to prolonged vomiting. Acidic foods and beverages can lower the pH of the stomach, but they have little effect on the pH of the blood or urine, which are regulated by other mechanisms such as buffers, lungs, and kidneys. Acidic foods and beverages can also irritate the gastric mucosa and trigger more vomiting, which can aggravate metabolic alkalosis.

Choice E reason:

Providing supplemental oxygen as needed is an intervention that the nurse should implement for a client who has metabolic alkalosis due to prolonged vomiting. Metabolic alkalosis can cause respiratory compensation by decreasing the respiratory rate and depth, which can lead to hypoxemia and hypercapnia. Supplemental oxygen can help maintain adequate oxygenation and prevent tissue hypoxia and organ damage. The nurse should monitor the client's oxygen saturation and arterial blood gas levels and adjust the oxygen therapy accordingly.