The nurse is caring for a patient with metabolic alkalosis. What will the nurse recognize as the common cause of this acid-base imbalance?

Chronic renal disease

Prolonged vomiting

Hyperventilation

Obstructive sleep apnea

Answer and Explanation

The Correct Answer is B

Choice A reason: Chronic renal disease typically leads to metabolic acidosis, not alkalosis, due to the accumulation of acids that the kidney cannot excrete.

Choice B reason: Prolonged vomiting leads to the loss of hydrochloric acid from the stomach, which can result in metabolic alkalosis due to the imbalance caused by the loss of stomach acid.

Choice C reason: Hyperventilation leads to respiratory alkalosis due to the excessive exhalation of carbon dioxide, reducing hydrogen ion concentration in the blood.

Choice D reason: Obstructive sleep apnea is typically associated with respiratory acidosis, not metabolic alkalosis, due to episodes of hypoventilation during sleep.

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Correct Answer is D

Explanation

Choice A reason: Always using a low flow device such as a nasal cannula or simple face mask is not necessarily appropriate for all patients. The choice of device should be based on the patient's oxygen needs and clinical status.

Choice B reason: Correcting the PaO2 to a normal level as quickly as possible using mechanical ventilation is not appropriate in most cases. Rapid correction of oxygen levels can lead to complications such as oxygen toxicity. Mechanical ventilation is used in severe cases but is not the first line of treatment for most patients.

Choice C reason: Using continuous positive airway pressure (CPAP) to maintain PaCO2 greater than 50 mmHg is incorrect. CPAP is used to maintain open airways and improve oxygenation but is not used to target specific PaCO2 levels.

Choice D reason: Increasing the PaO2 to an acceptable level at the lowest oxygen concentration possible is the most appropriate guideline. This approach aims to correct hypoxemia without causing oxygen toxicity. The goal is to achieve adequate oxygenation while minimizing the risk of adverse effects from high oxygen concentrations.

A. Advise the patient to consume protein and carbohydrates immediately. B. Notify the provider of the result and recommend that the patient's insulin dose be increased. C. Instruct the patient to withhold the next scheduled dose of insulin. D. Suggest that the patient asks their provider to start them on metformin therapy.

Correct Answer is B

Explanation

Choice A reason: Advising the patient to consume protein and carbohydrates immediately is not appropriate in this context. The presence of ketones in the urine indicates that the body is using fat for energy due to a lack of insulin. Increasing carbohydrate intake without addressing the underlying insulin deficiency can worsen hyperglycemia and ketoacidosis.

Choice B reason: Notifying the provider of the result and recommending that the patient's insulin dose be increased is the appropriate intervention. The presence of ketones in the urine indicates inadequate insulin levels, and adjusting the insulin dose can help correct the metabolic imbalance and prevent further complications such as diabetic ketoacidosis.

Choice C reason: Instructing the patient to withhold the next scheduled dose of insulin is incorrect. Insulin is essential for managing blood glucose levels and preventing ketosis in patients with type 1 diabetes. Withholding insulin can lead to severe hyperglycemia and ketoacidosis.

Choice D reason: Suggesting that the patient ask their provider to start them on metformin therapy is not appropriate for type 1 diabetes. Metformin is used primarily for type 2 diabetes and is not effective in type 1 diabetes, where insulin is required for glucose management.

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The nurse is caring for a patient with metabolic alkalosis. What will the nurse recognize as the common cause of this acid-base imbalance?

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Naxlex Comprehensive Predictor Exams

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