It seems many writers (especially of screen scripts!) don't know how quickly one dies from that kinda thing.
The opposite extreme also seems to be true. I was always amazed by how, in the Buffyverse, a vampire could sip at a victim slowly enough that when Buffy arrived, a while after hearing a scream, the victim could run off, presumably just fine. Other times, when Buffy *wasn't* about to conveniently show up, a vampire could bite someone and have them completely dead in under four seconds, without even spilling any of the blood.
As for Peter, it could be medical knowledge, but presumably he couldn't have started treating himself until after he'd finished the ritual (and, of course, the robing). If we're already presuming the knife to be magical for Peter to cut his hand off while holding it in midair, then maybe it also acted to paritally cauterize the wound, or at least activate clotting factors.
no subject
The opposite extreme also seems to be true. I was always amazed by how, in the Buffyverse, a vampire could sip at a victim slowly enough that when Buffy arrived, a while after hearing a scream, the victim could run off, presumably just fine. Other times, when Buffy *wasn't* about to conveniently show up, a vampire could bite someone and have them completely dead in under four seconds, without even spilling any of the blood.
As for Peter, it could be medical knowledge, but presumably he couldn't have started treating himself until after he'd finished the ritual (and, of course, the robing). If we're already presuming the knife to be magical for Peter to cut his hand off while holding it in midair, then maybe it also acted to paritally cauterize the wound, or at least activate clotting factors.