Coagulation factors are measured among many other blood tests done before any significant surgery. You would also be instructed which medication to avoid for weeks or month prior, including supplements like multivitamins if vitE is present, etc... All such pills aspirin or ibuprofen or likes would be forbidden, and paracetamol is generally the only one you can take during the weeks prior.
Given your experience, make shure to let any potential surgeon of yours aware of this accident, early enough, so you can make one appropriate test done like a month before surgery, additionally to the one that is usually done a day or two prior surgery.
