In general, most people would not want to thicken their blood before surgery, since it would present a larger risk of blood clots.
However, assuming you are an individual who actually could benefit from improving the clotting quality of their blood before surgery... there isn't a huge amount which can be done without the aid of pharmaceuticals. There is an obvious (but silly) way to thicken your blood, and that's by being dehydrated. Clearly this is not a healthy thing to do, and if you were to turn up to surgery dehydrated you would probably be given IV fluids anyway - it's a pointless route to go down.
There is sufficient evidence to say that calcium and vitamin k play crucial roles during clotting - however unless you're actually deficient in these substances there is very little benefit (and potentially some harm) in taking extra in the form of supplements.
I think, in this instance, your doctor and surgeon are probably fully aware of your clotting issues and will have taken them into account when constructing a plan of surgery for you (e.g keeping blood products on hand, using tranexamic acid etc...). However if you are in doubt about this, speak to them. It's really their responsibility to ensure that your clotting function is safe for surgery, rather than your responsibility - it's not something that can be easily altered.
vitamin K
It does not thicken your blood. It cloggs your blood arteries.
is it bad donating blood a day before surgery?
No; coumadin thins the blood. Take vitamin K to thicken the blood.
It is not bad to donate blood before surgery. But it is generelly unacceptable. Thats because when you donate blood,the volume of blood decreases in your body and after surgery it will take a long time for your body to recover than if you had not donated blood. Weakness and slow recovery after surgery are the most common side effects if blood has been done before surgery and is not advisable
It thins the blood.
Thicken with blood
Preoperative donation: the patient donates blood once a week for one to three weeks before surgery. The blood is separated and the blood components needed are reinfused during surgery.
If by thin blood you mean you are on anticoagulant, then yes it is a risk for any surgery. You can get excessive bleeding and ideally you will have to stop anticoagulant therapy a few days before surgery
Alcohol thins the blood. How? Because it is drawn into the blood stream, diluting the blood. This is bad with regards to a persons clotting factors. The thinner a persons blood, the quicker the person will bleed. Hense the adverse take on having alcohol before surgery. Not forgetting alcohol mixing badly with medications you will be given before during and after surgery.
Yes.
When you cut yourself you bleed. Before long, platelets help the blood to thicken and the bleeding stops. The thickened blood has formed a clot. without clotting, blood would be lost and pathogens would enter.