SeekingJana- you are so right about head injuries. Some overcome great odds and some do not. A lot depends on the brain activity. If brain has no activity not sure if there is any chance for recovery. My son was in a coma over 4 months, doctors gave no hope, told us he would remain in a coma and never recover. He beat all odds but we were never told he was brain dead. Sometimes (and I have seen this) death is the best outcome.
I am so happy about your son. I have worked with families who were also told their family member's injuries were hopeless. Some of these people did recover, and sometimes to a very high degree of functioning.
A prudent and POSITIVELY focused neurosurgeon/ neuro team will not label a person " brain dead" unless a condition exists which is oviously inconsistent with life, such as when most of the brain tissue has been extruded from the brain in an open skull wound.
In closed head trauma, so much less is known to both the medical team andless is obvious to the family about what's going on inside.
It is impossible to make a prudent and irreversible decision until all efforts to repair and heal the brain have been performed, the other body systems have maintained full functional support and much time has passed.
The thing about the " no brain activity" is that EEGs and even PET scans can CHANGE from hour to hour or day to day. Consider-- the phenomenon of " cold water drowning" in which brain activity CAN be impossible to detect due to a reflexive, protective mechanism inside the brain. In many cases, resuscitation, rewarming and life support can save the person's life. Doctors only discovered the presence of this reflex in the late 20th century from observing the deep cold water diving and brain activity of dolphins.
Likewise, when the brain is " shocked' by severe trauma, the brain definitely does have a protective mechanism of " shutting down" activity to the point that tests will not detect measurable " brain waves'.
This does not mean that the person is always in a state of death, or that they are being kept alive in a hopeless situation.
Only rigorous, vigilent neurlogical intervention and maintenence of full support over a period of time will tell.
A medical coma using sedative drugs is used to KEEP the brain activity very low.
The fact that medical science recognizes the benefits of a medically induced prolonged state of low brain activity should change the often conflicting rush to discontinue life support ( mechanical ventllation) soon after an event involving head trauma.
Obviously, some families are unable to accept that the person may not fully return to what they were prior to the injury, and may have heard the person say that they would not want to live with memory loss, or any form of dependence on others.
It's very hard to know what to do, and I respect and feel great empathy for both the medical teams and the families who are faced with either a " treat and see" or " stop life support' decision.
Just because I would choose treatment for a young and otherwise heathy adult does not mean that it's the right decision for all. I guess that's why there's a choice in the matter to begin with.