So to make this story as short as possible, I recently admitted a pt. who came in for hyponatremia (Na apparently at 117 at 1500), so we ran IVFs (just NS) and such until the doc made his rounds. After such, he ordered supplemental IVFs and kept the NS @ 125 going to see if that would help any. Lab was ordered to make draws q4 hours, and at 2000, the sodium was 116 :-/, so the MD orders 3% hypertonic NS. Because of severe dehydration, it was almost impossible to get an IV in, so after multiple tries, we finally get access and and start the hypertonic at about 2300...
So shortly after we start, the lab notifies the MD that the 2245 sodium draw is now miraculously at 135! Keep in mind that the hypertonic was started right after lab got that draw.
Is it possible for your sodium level to spike that quick in such a short time only with NS going at 125cc/hr? Or does that sound like a lab fluke?