Lena Mason, who has diabetes, is admitted in a stuporous condition. Her blood gases show a pH of 7.33, PaCO2 of 40 mm Hg, and HCO3- of 20 mEq/L. What type of acid-base imbalance does this patient have?

Metabolic alkalosis, uncompensated

Respiratory alkalosis, uncompensated

Respiratory acidosis, uncompensated

Metabolic acidosis, uncompensated

Answer and Explanation

The Correct Answer is D

Choice A reason: This is incorrect because metabolic alkalosis is characterized by a high pH and a high HCO3-. The patient's pH and HCO3- are both low, indicating acidosis, not alkalosis.

Choice B reason: This is incorrect because respiratory alkalosis is characterized by a high pH and a low PaCO2. The patient's pH is low and PaCO2 is normal, indicating a metabolic problem, not a respiratory one.

Choice C reason: This is incorrect because respiratory acidosis is characterized by a low pH and a high PaCO2. The patient's pH is low, but PaCO2 is normal, indicating a metabolic problem, not a respiratory one.

Choice D reason: This is correct because metabolic acidosis is characterized by a low pH and a low HCO3-. The patient's pH and HCO3- are both low, indicating a metabolic disorder. The condition is uncompensated because the PaCO2 is normal, meaning the respiratory system is not compensating for the metabolic acidosis.

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Correct Answer is A

Explanation

Choice A reason: This is correct because respiratory acidosis is a condition where the blood pH is lower than the normal range of 7.35 to 7.45, due to impaired gas exchange or hypoventilation, which causes carbon dioxide to accumulate in the blood. COPD is a chronic lung disease that obstructs the airways and reduces the oxygen intake and carbon dioxide output. This leads to respiratory acidosis in the patient.

Choice B reason: This is incorrect because respiratory alkalosis is a condition where the blood pH is higher than the normal range of 7.35 to 7.45, due to hyperventilation, which lowers the carbon dioxide in the blood. COPD does not cause hyperventilation, but rather hypoventilation.

Choice C reason: This is incorrect because metabolic alkalosis is a condition where the blood pH is higher than the normal range of 7.35 to 7.45, due to a loss of acids or an excess of bases in the body. COPD does not affect the metabolic system directly, but rather the respiratory system.

Choice D reason: This is incorrect because metabolic acidosis is a condition where the blood pH is lower than the normal range of 7.35 to 7.45, due to an excess of acids or a loss of bases in the body. COPD does not affect the metabolic system directly, but rather the respiratory system.

A. 3.10 to 4.10 mg/dL B. 5.55 to 6.55 mg/dL C. 8.50 to 10.50 mg/dL D. 13.41 to 14.51 mg/dL

Correct Answer is C

Explanation

Choice A reason: This is a low value for serum calcium, which indicates hypocalcemia. Hypocalcemia can cause muscle spasms, tetany, seizures, and cardiac arrhythmias.

Choice B reason: This is also a low value for serum calcium, which indicates hypocalcemia. Hypocalcemia can cause muscle spasms, tetany, seizures, and cardiac arrhythmias.

Choice C reason: This is the normal range of serum calcium in adults. Calcium is essential for bone health, muscle contraction, nerve transmission, and blood clotting.

Choice D reason: This is a high value for serum calcium, which indicates hypercalcemia. Hypercalcemia can cause nausea, vomiting, constipation, confusion, lethargy, and kidney stones.

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Lena Mason, who has diabetes, is admitted in a stuporous condition. Her blood gases show a pH of 7.33, PaCO2 of 40 mm Hg, and HCO3- of 20 mEq/L. What type of acid-base imbalance does this patient have?

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Naxlex Comprehensive Predictor Exams

A patient has end-stage chronic obstructive pulmonary disease (COPD). Which acid-base imbalance would be predictable in a patient with COPD?

Correct Answer is A

Explanation

What is the normal range of serum calcium in adults?

Correct Answer is C

Explanation

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If your patient has a higher than normal pH (alkalosis), you would expect to also see:

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Lena Mason, who has diabetes, is admitted in a stuporous condition. Her blood gases show a pH of 7.33, PaCO2 of 40 mm Hg, and HCO3- of 20 mEq/L. What type of acid-base imbalance does this patient have?

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