@herstein.jacob
thoughts?
Support have heard this discussed on wards as well
We have a card for this
I remember that AMBOSS has two equations for this (1.6 and 2) and for some reason during my clinical rotations they always use 1.6
1502564723231
Seems like UW Step 2 4516 explanation and Sketchy uses 2. While AMBOSS uses 1.6 and that’s all I have heard used on clinicals as well.
I believe these differences come from the fact there’s two commonly accepted formulas to calculate correct sodium.
Corrected Sodium (Katz, 1973) = Measured sodium + 0.016 * (Serum glucose - 100)
Corrected Sodium (Hillier, 1999) = Measured sodium + 0.024 * (Serum glucose - 100)
The classic correction factor of 1.6 mEq/L in serum sodium for every 100 mg/dL increase in serum glucose was challenged by a paper by Hillier et al. in 1999; sometimes their factor of 2.4 mEq/L is used.
MD Calc - Sodium Correction for Hyperglycemia
Yes, and 2 is in the middle. It’s also easier to calculate
Like the suggestion but think we should keep it consistent in the deck and use the same number in both cards, so would change it to 2 unless everyone wants to change both to 1.6 (difficult though if UWorld uses 2), but @IantheBFG’s info about the different values used and sources would be a great addition to nid:1502564723231 to help highlight that there is more than 1 value used
Edited to be more concise / highlight the issue of “true” hyponatremia since previously this said pseudo