A client in the emergency department reports that he has been vomiting excessively for the last 2 days. His arterial blood gas (ABG) analysis shows a pH of 7.50, the partial pressure of arterial carbon dioxide (PaCO2) of 43 mm Hg, partial pressure of arterial oxygen (PaO2) of 75 mm Hg, and bicarbonate (HCO3) of 42 mEq/L. Based on these findings, the nurse documents that the client is experiencing which type of acid-base imbalance?
Metabolic Alkalosis
Respiratory Alkalosis
Respiratory Acidosis
Metabolic Acidosis
The Correct Answer is A
A. Metabolic Alkalosis:
pH: Elevated (alkalotic).
PaCO2: Normal or slightly decreased (compensation may or may not be present).
HCO3: Elevated.
Explanation: Metabolic alkalosis is characterized by an excess of bicarbonate (HCO3) in the blood, leading to an elevated pH. In this case, the elevated pH and HCO3 levels suggest that the primary imbalance is metabolic alkalosis.
B. Respiratory Alkalosis:
pH: Elevated (alkalotic).
PaCO2: Decreased (due to hyperventilation, which blows off CO2).
HCO3: Normal or slightly decreased (compensation).
Explanation: Respiratory alkalosis is characterized by low levels of carbon dioxide (PaCO2) due to hyperventilation. However, in the provided ABG, the PaCO2 is not significantly decreased, suggesting that respiratory alkalosis is not the primary issue.
C. Respiratory Acidosis:
pH: Decreased (acidotic).
PaCO2: Increased (due to inadequate ventilation).
HCO3: Normal or slightly elevated (compensation).
Explanation: Respiratory acidosis is characterized by an increase in carbon dioxide (PaCO2) levels. In this case, the PaCO2 is within the normal range, indicating that respiratory acidosis is not the primary problem.
D. Metabolic Acidosis:
pH: Decreased (acidotic).
PaCO2: Normal or slightly decreased (compensation).
HCO3: Decreased.
Explanation: Metabolic acidosis is characterized by a decrease in bicarbonate (HCO3) levels. In this ABG, the HCO3 is elevated, ruling out metabolic acidosis as the primary issue.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B"]
Explanation
A. I will inject my insulin by pinching up a large area of skin, and then inserting the needle.
The correct technique for subcutaneous insulin injection involves pinching a small area of skin (creating a skinfold) and inserting the needle at a 90-degree angle. Injecting into a large area might result in inadequate subcutaneous administration.
B. I can mix my regular acting insulin and my Lantus in the same syringe.
Lantus (insulin glargine) is a long-acting insulin that should not be mixed with other insulins. It should be administered separately to maintain its long-acting profile.
C. I can inject my insulin in the same location each time.
This statement is correct. Injecting insulin into the same general area consistently can help with consistent absorption.
D. I can use a needle/syringe more than once since I am the only one using it.
It is not safe to reuse needles or syringes. Single-use needles and syringes should be disposed of properly after each use to prevent infection and other complications.
E. I will discard my used syringes in a hard container, like an empty plastic milk jug.
This statement is correct. Used syringes should be discarded in a puncture-resistant container, and an empty plastic milk jug can serve as a suitable container for disposal.
Correct Answer is C
Explanation
A. The need to match the daily steroid dose to immediate symptoms:
Explanation: Adjusting the steroid dose based on immediate symptoms is not a recommended approach. Patients should follow the prescribed regimen provided by their healthcare provider.
B. The importance of monitoring liver function:
Explanation: While monitoring liver function is important for some medications, it is not the primary focus when teaching about hormone replacement therapy in Addison's disease. The emphasis is on the need for life-long steroid replacement.
C. The need for life-long steroid replacement:
Explanation: Patients with Addison's disease require life-long steroid replacement therapy to compensate for the deficiency in adrenal hormones. It's important for the patient to understand that adherence to the prescribed steroid regimen is essential for maintaining health and preventing adrenal crisis.
D. The possibility extreme weight loss from the use of corticosteroids:
Explanation: While corticosteroids can have various side effects, extreme weight loss is not a typical or desired outcome of steroid therapy for Addison's disease. Weight changes and potential side effects should be discussed, but the emphasis should be on the importance of long-term steroid replacement.

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