Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

Dr. Jim Macgregor M.D. on Oswald's injuries:

Ralph,

The liver, spleen, and kidneys are, as you know, highly vascular organs, so 
trauma to them alone would lead to considerable hemorrhage. But, when you  
add in the catastrophic blood loss from the rupture of the aorta and vena cava,
I reckon he would lose consciousness very quickly and be dead within 2 to 3 
minutes. 

Jim

RC: Thank you, Jim. That is consistent with what I'm finding 
elsewhere, such as  on Pub Med: victims with a ruptured aorta
alone typically die within 2 or 3 minutes and do not make it 
to the hospital alive. 

Oswald was shot on tv at around 11:20, and I have
seen it pegged as 11:21. And reportedly, his ambulance
arrived at the hospital at 11:30. But, that could be just an
approximation. But, that's 9 minutes in which Oswald received
no treatment and no helpful support whatsoever. 

And, by the time they wheeled him in and an assessment was 
made, how long before a blood transfusion started flowing 
into him? I don't know, but it had to be at least a few minutes.
So, let's say 3. That would come to 12 minutes between trauma
and supportive intervention. It is just too long. He could not
have survived that long and still been alive when Parkland 
doctors started working on him. 

I forgot to tell you, Jim, that the Superior Mesenteric artery 
was also blown apart. So, that's in addition to the aorta, the 
vena cava, and the highly vascular tissues of the spleen, 
pancreas, liver, and right kidney.  It is simply impossible that
Oswald was shot at 11:21 as shown on television. It is
medically and biologically impossible for him to have 
survived that long without aid.