as a volunteer firefighter, i have to know these types of things for search and rescue. and im sharing this because a lot of books don't get this realistically.
so, statistically, an average person has 5 litres of blood. but someone can have as much as 8. think about this like soda or pop bottles. think of 5 of those. obviously a smaller person will have less and the affects will be worse for them.
note: total blood volume is just the total amount of blood in the body
1) 1/2 a liter is about 10% of total blood volume. this isn't actually that dangerous. pulse is still present, heart rate is normal, blood pressure is ok and breathing is normal. they will live.
2) 1 liter is 20% of total blood volume. the person is still alert, the pulse is still present but the heart rate is elevated, blood pressure and respiratory rates are normal if person is lying down. if not, they will be elevated as well. it's gonna suck, but they'll be ok.
3) a liter and 1/2 is about 30% of total blood volume. the person will be confused and anxious. Pulse is weak and breathing is fast and shallow. blood pressure has decreased, 30 breaths per min, maybe more. they'll be ok....
Prolly.
4) 2 liters is 40% total blood volume. the person will be very confused and lethargic. (which is another term for fatigue or they're trying very hard to stay awake) very weak pulse, breathing is fast and shallow. heart rate is above 120 BPM. very good chance of dying.
5) 2 1/2 liters is 50% of total blood volume. the person is unconscious by now. pulse is absent, heart rate is above 140 BPM (which is equivalent to being in the middle of a heavy workout) blood pressure is very very low. breathing is very fast and shallow. there's no possible way to survive.
I hope this helped and PLEASE comment some requests, I need to knowwww.
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