試題詳解

20. A 52-year-old man with a 20-year history of cigarette smoking is admitted to the hospital because of cough and weakness. On admission, his serum electrolyte levels are: serum [Na] 112 mEq/L; [K] 4.5 mEq/L; [Cl] 80 mEq/L; and HCO3-, 26 mEq/L. The BUN was 8 mg/dL , serum creatinine 0.8 mg/dL and serum uric acid 3.0 mg/dL. These data are most consistent with which of the following?
(A) SIADH (syndrome of inappropriate antidiuretic hormone secretion)
(B) Congestive heart failure
(C) Cirrhosis and ascites
(D) Severe salt and water depletion
(E) Adrenal insufficiency