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 B
Explanation
A. 30 minute onset; 2-hour duration: This does not accurately represent the onset and peak action time of Insulin Lispro.
B. 15 minute onset; 30-60 minutes peak: This is correct. Insulin Lispro has a rapid onset (starts working within 15 minutes) and a peak action time of 30-60 minutes after administration.
C. 2-hour onset; 12-hour duration: This is not accurate for rapid-acting insulin. Rapid-acting insulin has a much quicker onset and shorter duration compared to this option.
D. 15 minute onset; no peak (continuous): While the onset time is correct, stating "no peak" is not entirely accurate. Rapid-acting insulin does have a peak, but it's relatively short, occurring within the first hour after administration.
Correct Answer is B
Explanation
A. Monitoring the patient's breathing and reviewing the patient's arterial blood gases:
Rationale: While respiratory status is crucial in any patient assessment, arterial blood gases primarily evaluate respiratory function. Neutropenia directly affects the immune system, not respiratory function.
Appropriateness: Not directly related to assessing neutropenia.
B. Monitoring the patient's temperature and reviewing the patient's complete blood count with differential:
Rationale: Neutropenia can cause fever due to the increased risk of infection. Monitoring temperature and reviewing the complete blood count (CBC) with differential, specifically the neutrophil count, is essential in evaluating neutropenia and identifying potential infections.
Appropriateness: Correct. Monitoring temperature and reviewing CBC with differential are crucial in assessing neutropenia.
C. Monitoring the patient's blood pressure and reviewing the patient's hematocrit:
Rationale: Blood pressure assessment and hematocrit evaluation are essential aspects of general patient care but are not specific to neutropenia.
Appropriateness: Not directly related to assessing neutropenia.
D. Monitoring the patient's heart rate and reviewing the patient's hemoglobin:
Rationale: Heart rate monitoring and hemoglobin assessment are crucial in various clinical situations but are not specific indicators of neutropenia.
Appropriateness: Not directly related to assessing neutropenia.
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