nemonclature: Blade tied to a chair, looking up at camera (look up)
[personal profile] nemonclature
The human body contains about 5 litres of blood, allowing for differences in body weight. A donor usually gives about 8-10% of their blood (so approx 500ml). 15-30% (1.5 litres) and you'll feel sick, go pale and your skin will start feeling cold. 30-40% (2 litres) and your heart starts beating faster you'll probably need a transfusion to recover. Over 40% your probably a goner.

In one sitting, you can probably drink 1-1.5 litres comfortably. The stomach can expand to about 4 litres, which is why people can drink a gallon of milk without exploding (but then usually vomit it up after because... what did they expect?)

You can bleed out from the carotid (neck), brachial (arm) or femoral (leg) in about a minute. But arteries are fairly difficult to get at. In the wrist, you'd have to slice vertically down your artery to bleed out with any speed, so from a vamp bite you're talking a few hours, plus the possibility of clotting staunching the flow.

In the neck you'd probably hit veins or even the windpipe first, depending on your aim. Most the time they bite the meat of shoulder, not the pulse point (i.e. artery) which is harder to get to, higher on the neck.

As for the femoral, it's fairly difficult to get your face into someone's groin if accosting outside of a naked sexytimes scenario.

Also vamp teeth are fairly thin and short. It's questionable how far they'd even penetrate considering the layer of fat we all have under the skin before you even get to any good stuff.

So while they may nick an artery, we're not looking at the bleeding out in minutes that you get from severing one fully. You will bleed, and suction will probably induce a steady flow, but you're unlikely to bleed out from a bite wound.

So overall, that equals: a vampire can safely drink as much as the victim can safely lose. The victim won't die, but will feel woozy and need to drink electrolytes or take iron tablets to recover. The wound is going to need pressure and treating, if an artery is nicked, probably in the hospital so they can make sure it heals ok, but if no artery is touched, then just like you would a normal cut. It should clot fine and NO ONE NEED DIE.

The whole, vampire grabs a person by the neck and drains them in seconds, dropping their dead body to the floor? NO. It would be, vamp grabs by neck, stretches head awkwardly to side to get at carotid. Bites, gets blood EVERYWHERE like it's being sprayed out by a fucking garden hose. Makes a massive mess and a few minutes later, the person dies. They would not be able to drink that much blood without vomiting it back up again a la the milk gallon drinking fools. Not a sexy look, I'd imagine.

IF they have anticoagulants in their saliva, then, provided they do pierce an artery, (which isn't easy) passing out followed by death is probably inevitable without medical treatment. Though still, not going to be instantaneous, but a few minutes to an hour depending on severity of bite.

For the ones that rip the entire throat out with their teeth, well yes. Obvs that kills.



Follow up for this would be, if a vamp can drink, let's say 1 litre per person to be on the safe side, then they need to hit up 5 people per night to fully replace the blood in their body. Though, we don't know what happens to blood once in a vamp's body exactly. Maybe since they're dead, they can't generate new blood, only use what they have until it dies. Red blood cells live for about 4 months, so 5 people every 4 months, or, since they could take just over a litre from each person, that's basically hitting one person a month for just over 1 litre of blood.

One person a month. Seriously, couple of iron tablets and some Lucozade and they're fine. NO BIG.
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