As the ICU nurse caring for a patient with multiple traumas from an ATV accident, you draw arterial blood gasses (ABGs) every 4 hours. What are you assessing in this patient with the ABGs?
A) The bicarbonate-carbonic acid buffer system
B) The patient's oxygen status
C) The patient's intracellular buffer systems
D) Metabolic acidosis status
Ans: A
Feedback: The body's major extracellular buffer system is the bicarbonate–carbonic acid buffer system, which is assessed when arterial blood gases are measured. Option B is incorrect; a pulse oximeter would monitor the patient's oxygen status. Options C and D are incorrect; ABGs do not assess intracellular buffer systems or metabolic acidosis status.
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