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Review Question - QID 214515

Acid-Base Differential Diagnosis Introduction Anion gap QID: 214515 (M1.OMB.1)
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QID 214515 (Type "214515" in App Search)
A 41-year-old man who is well known to the Denver emergency department is brought in by ambulance after he was found down in the park. On presentation, he is unable to provide any information and immediate laboratory tests reveal the following:

Serum:
Na+: 141 mEq/L
Cl-: 106 mEq/L
K+: 3.6 mEq/L
BUN: 18 mg/dL
Glucose: 103 mg/dL
Creatinine: 1.5 mg/dL

Arterial:
pH: 7.18
PaCO2: 19 mmHg
HCO3-: 7 mEq/L

Which of the following etiologies is most likely responsible for this patient's findings?
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