A nurse is reviewing the laboratory results of a client who was hyperventilating during a panic attack.
Which of the following arterial blood gas values should the nurse expect?
pH 7.50 and HCO3 31 mm Hg.
pH 7.30 and HCO3 19 mm Hg.
pH 7.47 and PaCO2 31 mm Hg.
pH 7.32 and PaCO2 50 mm Hg.
The Correct Answer is C
The correct answer is: C.
Choice A reason: A pH of 7.50 and HCO3 of 31 mm Hg suggest a metabolic alkalosis due to the high bicarbonate level. However, during a panic attack, hyperventilation leads to respiratory alkalosis, not metabolic, due to the excessive exhalation of CO2, which is not consistent with this option.
Choice B reason: A pH of 7.30 and HCO3 of 19 mm Hg indicate a metabolic acidosis due to the low bicarbonate level. This is not typically associated with hyperventilation during a panic attack, which usually causes respiratory alkalosis, characterized by a decrease in CO2 levels and an increase in pH.
Choice C reason: A pH of 7.47 and PaCO2 of 31 mm Hg are indicative of respiratory alkalosis, which is expected during hyperventilation as a result of a panic attack. Hyperventilation causes a decrease in carbon dioxide (PaCO2) levels, leading to an increase in pH. The normal ranges for arterial blood gases are: pH 7.35-7.45, PaCO2 35-45 mm Hg, and HCO3 22-26 mEq/L.
Choice D reason: A pH of 7.32 and PaCO2 of 50 mm Hg suggest respiratory acidosis due to the elevated PaCO2 level. This would be more consistent with hypoventilation, which is not the case during a panic attack where hyperventilation occurs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
The nurse should identify that an effective outcome of IV fluid replacement in a client with dehydration is an increase in urine output. Urine output of 200 mL in 4 hours indicates that the kidneys are responding to the IV fluid replacement, and the client is likely rehydrating. This suggests that the renal perfusion has improved, and the client's body is eliminating waste products properly.
Choice B rationale:
A heart rate of 104 beats per minute is not necessarily indicative of the effectiveness of IV fluid replacement. Heart rate may vary for various reasons, and it is not a specific parameter for assessing the response to hydration. Other factors, such as blood pressure, should be considered to evaluate cardiovascular status.
Choice C rationale:
Peripheral pulses of +1 are not a direct indicator of the effectiveness of IV fluid replacement. While improved hydration may lead to better peripheral perfusion, this assessment is somewhat subjective and may not accurately reflect the overall effectiveness of the treatment.
Choice D rationale:
A urine specific gravity of 1.04 is not indicative of the effectiveness of IV fluid replacement. A specific gravity of 1.004 is within the normal range (normal range: 1.005-1.030) and does not necessarily indicate hydration status. It is essential to focus on urine output and other objective parameters to assess the effectiveness of hydration therapy. .
Correct Answer is B
Explanation
Choice A rationale:
Hypoglycemia Hypokalemia (low potassium levels) is not typically associated with hypoglycemia (low blood sugar). Hypokalemia primarily affects the function of muscles and nerves, and it does not directly influence blood glucose levels.
Choice B rationale:
Cardiac dysrhythmias Hypokalemia can lead to cardiac dysrhythmias. Potassium plays a crucial role in maintaining the electrical activity of the heart, and low potassium levels can disrupt normal cardiac rhythms, potentially leading to life-threatening arrhythmias. Cardiac dysrhythmias are a well-recognized complication of severe hypokalemia, making this choice the correct one.
Choice C rationale:
Increased appetite Hypokalemia is not associated with an increased appetite. In fact, it can lead to gastrointestinal disturbances, such as nausea, vomiting, and abdominal pain, which may decrease appetite. The primary manifestations of hypokalemia are related to muscle weakness and cardiac abnormalities.
Choice D rationale:
Hyperreflexia Hyperreflexia (excessive reflex responses) is not a typical manifestation of hypokalemia. Hypokalemia is more commonly associated with muscle weakness, cramps, and cardiac disturbances. Hyperreflexia is often seen in conditions of excessive calcium levels (hypercalcemia) or neurological disorders, not hypokalemia.
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