Blood pressure is a one of the key elements in fluid resuscitation. The
resuscitation fluid then has to be balanced with kidney output. Generally,
it is better to keep a patient "wet". It would be standard protocol to
start a trauma patient on fluids to try to prevent shock, which in itself is
life threatening. The average adult has 6 to 8L=1000 mL or 10 pints of
blood. So, he had lost a great deal of blood. Blood is so
complex--nutrients, hormones, proteins, electrolytes it is hard to know
exactly what happened. Did you have an autopsy performed? There could be
other unknown factors. I always hate those types of injuries, because they
are very unpredictable. Other factors like is the patient kept warm enough
also play a role. We now know that if a person is not kept warm enough,
they tend to bleed more. We have come a long way in the last 10 years in
blood management. However, that really does not help your heart. My
husband's name was also David. It means "beloved", which seems to fit your
David as well as mine. Hope this helps, at least some. yvette

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Yvette Bunch