I mean, I get a little nick from a knife while chopping vegetables and I fill up a small bowl with blood… but these guys are doing open heart surgery and theres barely any blood at all.
Why is that?
In: 4
One: The body isn’t just a sack full of a blood. It’s a closed system where you only seriously bleed if you severe a major artery. Surgeons are trained not to cut arteries unless necessary.
Two: A lot of surgeries begin with a local injection of epinephrine, which constricts local blood vessels. This means that the local area doesn’t bleed much because the vessels are not flowing fully.
Three: If the surgery requires a blood transfusion, the transfusion will include the clotting factors that lead to clot formation. This means that your blood is primed to stop bleeding.
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