Precious Bodily Fluids

Hi Dr. Topf, I hope you’re doing well! I was reviewing S11: Sodium Metabolism, and I think I’m having some trouble understanding why euvolemic hyponatremia is non-edematous while hypervolemic hyponatremia is edematous. I was wondering if you could please help me correct my thought process. Voume status is a total body sodium issue (more sodium, …

Occam’s razor: when evaluating multiple competing theories, the simpler explanation of an entity is to be preferred. Solid logic, but not infallible. This week I took care of a patient with a serum calcium of 17.5 mg/dL. Calciums that high are almost always malignant in nature. But we did the internal medicine thing and ran …

Note: This post first ran on Roon. Roon is a physician only (and US only, for now) social media site. It is growing and you should check it out. Every nephrology fellowship has the same challenge. Every July 1, fresh fellows walk through the door. They’re smart, motivated, and terrified of upcoming responsibilities. And every …