Originally posted by Fisherman
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Fisherman, I offer my apologies on number of vessels cut, but I disagree on your less than one minute statement as that is only possible with a free rupture of the aorta (and even then unlikely as stroke volume drops as venous return falls). Given a non-stemmed flow of both common carotid arteries, the maximum flow rate is around 750ml per minute, so pulses would likely be present until three minutes post incision, again assuming linear rate of blood loss. Even this would be an underestimate as the arterial muscular walls would spasm thereby reducing flow rate and hence blood loss.
I apologise for not at hand being able to calculate the likely reduced cerebral blood flow (through the carotid arteries) as blood volume drops. Even then as a back of an envelope calculation, I believe Pierre's initial timeline gives a time of incision a few minutes too late.
Paul
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