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Old February 8th, 2013 #3273
Donald E. Pauly
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Join Date: Dec 2003
Location: Las Vegas
Posts: 4,130
Angry Horseshit

Quote:
Originally Posted by Bev View Post
........as I said - down to the stomach and then off round the body, carrying oxygen as it goes.

Point being, it points down, not up. Blood collected downwards, not shot upwards. Think of the aorta as a hosepipe hanging out of the kitchen window and the water tap as the heart - puncture it and the pressure reduces and diverts from the main outlet. No forceful pressure pushing clots upwards.

http://biology.about.com/od/anatomy/a/aa041207a.htm
How the hell do you think blood gets to the brain? Blood pressure going into the aorta is enough to squirt blood six feet into the air when the head is cut off. The density of a clot is the same as liquid blood and it floats along with the blood until it blocks a capillary. This kills brain cells (neurons) which causes a mini stroke. This stroke will in general cause subtle effects and not vision, balance or speech problems. It is the type of stroke that makes you go queer or turn into a psychopath. Larger clots on the order of the size of a pencil eraser cause paralysis, speech and vision problems. They destroy brain volumes on the order of the size of a grape. These are seldom caused by cardiac surgery.

Capillaries range in size from 5 microns to 10 microns (millionth of a meter) . Human hairs range from 17 to 180 microns. In other words, the biggest capillaries are half the size of the smallest hairs. Red blood cells have to go thru them in single file. Any debris in the aorta causes brain damage if the it goes to the brain. Cuts on the aorta invariably dislodge scraps of cells. Debris going to other organs only does minor local damage.

All surgery from the pulmonary artery of the lungs to the carotid artery in the neck causes brain damage to various degrees. Brain surgery is far less likely to cause stroke induced brain damage than heart surgery.

Last edited by Donald E. Pauly; February 8th, 2013 at 07:13 PM. Reason: typo