pf2e.fyi
From Pathfinder Lost Omens Rival Academies, which isn't enabled.

Artery Map

FEAT 6

While you've learned all the places a scalpel can cause extensive bleeding to avoid disasters in surgery, such knowledge can serve other purposes. When you Strike an Off-Guard creature with a weapon from the knife group, you deal 1d6 persistent bleed damage. The damage increases to 1d10 when you are legendary in Medicine.

Pathfinder Lost Omens Rival AcademiesORC