NURSING ARTERIAL BLOOD GAS INTERPRETATION TEST EXAM 1 20 Q&A’S WITH RATIONALES (GUARANTEED PASS) | RATED A+
1. In a patient undergoing surgery, it was vital to aspirate the contents of the upper
gastrointestinal tract. After the operation, the following values were acquired from an arterial
blood sample: pH 7.55, PCO2 52 mm Hg and HCO3- 40 mmol/l. What is the underlying
disorder?
o A. Respiratory Acidosis
o B. Respiratory Alkalosis
o C. Metabolic Acidosis
o D. Metabolic Alkalosis
Correct Answer: D. Metabolic Alkalosis
NGT suctioning, vomiting, hypokalemia and overdosage of NaHCO3 are considered risk factors
of metabolic alkalosis.
2. George Kent is a 54-year-old widower with a history of chronic obstructive pulmonary disease
and was rushed to the emergency department with increasing shortness of breath, pyrexia, and a
productive cough with yellow-green sputum. He has difficulty communicating because of his
inability to complete a sentence. One of his sons, Jacob, says he has been unwell for three days.
Upon examination, crackles and wheezes can be heard in the lower lobes; he has tachycardia and
a bounding pulse. Measurement of arterial blood gas shows pH 7.3, PaCO2 68 mm Hg, HCO3
28 mmol/L, and PaO2 60 mm Hg. How would you interpret this?
o A. Respiratory Acidosis, Uncompensated
o B. Respiratory Acidosis, Partially Compensated
o C. Metabolic Alkalosis, Uncompensated
o D. Metabolic Acidosis, Partially Compensated
Correct Answer: B. Respiratory Acidosis, Partially Compensated
The patient has respiratory acidosis (raised carbon dioxide) resulting from an acute exacerbation
of chronic obstructive pulmonary disease, with partial compensation.
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