Created at 6:27 p.m. Dec, 03, 2024
Author: jollydolphin
Related Note: 1488765251203 2
Rationale for change

- Remove uninteresting fact about factor X. Since factor X is common to both PT and PTT, this fact doesn't help explain why we pick PT over PTT as the assay to track Warfarin effect.

- Remove unhelpful mnenomic. I can't figure out how to apply this mnenomic to make this card easier to remember. I also asked chatgpt which had no idea either.

- Add explanation for why we track PT and not PTT.

From Amboss' article on vitamin k:

" vitamin-K-dependent proteins involved in: Coagulation: maturation of factors II (prothrombin), VII, IX, and X"[0]

Thus, we can either track VII or IX (since X is common) and we then choose VII because it has the shorter half-life.

Note: Click on factor VII in the (primary) amboss link to get a source for it being the factor with the shortest half-life (6-8 hours), but this is also information already in Anking.

[0]https://next.amboss.com/us/article/Ao0ReS
Source: AMBOSS - https://next.amboss.com/us/article/8T0Os2?q=factor+vii#Z913b59343b61d1b4cf881043eda984f5

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