Patient comes to the ER. She has a a sodium of 119.
Four days earlier the sodium was 134.
ER provides normal saline and the sodium falls to 114.
This is classic SIADH. If you see the serum sodium fall with normal saline, SIADH is your diagnosis.
The fellow ordered all the right tests:
- Urine Sodium: 81
- Urine Potassium: 87
- Urine osmolality: 583
- Uric acid: 2.6
- BUN: 13
- Cr: 0.95
|From the drug insert|
- Urine Sodium: less than 10
- Urine Potassium: 10
- Urine Osmolality: 111
Blogged with patient permission. Release on file at PBFluids world headquarters.