Sunday, September 5, 2010


Check out that urine sodium. The guys pissing normal saline. That's the highest urine sodium I have ever seen.

Urine sodium 148
Urine potassium 48
Serum sodium 124
Urine output 2350

Electrolyte free water clearance:
-1364 mL

Interpretation: with those urine electrolytes, when urinates 2,300 mL it is as if he actually drank nearly a liter and a half of tap water. And that is why fluid restriction fails in dense SIADH.

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