Thank you Minor
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No worries.
My recollection from time in the medical examiner's office was that arterial spurts or spray cannot occur after the heart stops beating. This is a distinguishing factor in analysis determining pre and post mortem injuries. A good example was the lack of bleeding in Travis' brain along the bullet trajectory, where there was simply contusion/bruising and tissue destruction.
This is highly reliable with stab wounds where the lack of arterial spray (unless the body's been moved) indicates a post mortem wound.
As I stated before, no heartbeat, no arterial spurt. With brainstem injury or death the vasomotor tone immediately relaxes and the blood volume pools there. You don't have enough blood to fill your entire network of vessels. As you know, when you're alive your body shunts flow differentially to the areas in most need.
Any bleeding after brain stem injury or death from small and medium vessels would run out like a hose on little more than a trickle. Larger vessels like the jugular veins would empty a little more substantially in the case of a neck wound or stab. Even the aorta, the largest "artery," would not give one last " spurt."
As I'm not a pathologist and don't subscribe to their journals, if possible, it is going to take some time to find a concise reference.
Hope that helps