ATI RN
ATI Med Surg Exam 10 Questions
Extract:
Question 1 of 5
Maria, an elementary student, was rushed to the hospital due to vomiting and a decreased level of consciousness. The patient displays slow and deep (Kussmaul breathing), and he is lethargic and irritable in response to stimulation. He appears to be dehydrated-his eyes are sunken and mucous membranes are dry-and he has a two-week history of polydipsia, polyuria, and weight loss. Measurement of arterial blood gas shows pH 7.0, PaO2 90 mm Hg, PaCO2 23 mm Hg, and HCO3 12 mmol/L; other results are Na+ 126 mmol/L, K+ 5 mmol/L, and Cl-95 mmol/L. What is your assessment?
Correct Answer: B
Rationale: Metabolic acidosis is indicated by a low pH and a decreased bicarbonate (HCO3) level. The body attempts to compensate by hyperventilating, evidenced by Kussmaul breathing, to decrease PaCO2. This compensation is partial because the pH is still significantly lower than normal.
Question 2 of 5
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