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Neoma Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:42 PM
Original message
Without oxygen to the brain - how many minutes
Till damage then brain death?
And can someone provide links also?

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seriousstan Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:44 PM
Response to Original message
1. Some brain cells actually start dying less than 5 minutes
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Tempest Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:46 PM
Response to Original message
2. Within 2 minutes
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Worst Username Ever Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:46 PM
Response to Original message
3. The rule of 4's
This is a rule of thumb for healthy, active individuals (unconcious with no muscled movement, ie.e Terry, is a bit different...)

4 minutes without oxygen
4 days without water
40 days without food
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BlueEyedSon Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:50 PM
Response to Reply #3
7. not 4 weeks (food)?
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Worst Username Ever Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 05:10 PM
Response to Reply #7
12. I suppose that would work,
30-40 days depending on the individual, I guess 28 days is close enough. I'm scrawny so I doubt I'd last the full 40 days.
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ohio_liberal Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:47 PM
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4. The brain can survive for up to about six minutes after the heart stops.
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Warpy Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:47 PM
Response to Original message
5. CPR classes give us a 4 minute window
in which to initiate CPR. After that, brain cells begin to die quite rapidly, moving from the higher functions to the lower.

Schiavo was "down" for at least 5 minutes before the paramedics arrived.

She hadn't had so much damage that she was killed outright or had destroyed her respiratory center in the brainstem. However, her inability to improve during the first two years post injury, even with an experimental thalamic stimulator implanted, show just how quickly the brain can be destroyed by a lack of circulation and oxygen.
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Bluebear Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:50 PM
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6. Cerebral Hypoxia Information Page
http://www.ninds.nih.gov/disorders/anoxia/anoxia.htm

Brain cells are extremely sensitive to oxygen deprivation. Some brain cells actually start dying less than 5 minutes after their oxygen supply is cut. As a result, brain hypoxia can kill or cause severe brain damage rapidly.

http://www.nlm.nih.gov/medlineplus/ency/article/001435....
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Cuban_Liberal Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:51 PM
Response to Original message
8. Rule of thumb: at 2, changes occur; at 4, cells begin to die. n/t
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tubbacheez Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:51 PM
Response to Original message
9. 9 - 12 sec to loss of consciousness. Some damage begins ...
Edited on Mon Mar-28-05 04:53 PM by tubbacheez
... a few seconds after that and gets worse in an accelerating manner.

My understanding is that different there's a lot of variation between brains in how much mental capacity gets affected at what point in this process.

I haven't seen any study that gets too specific on what damage occurs when. I imagine it's tough to get funding for a study that proposes to deprive test subjects' brains of oxygen for precisely measured durations of time.

Anyway, most data I've seen seems collected from various accident victims (drownings, near-drownings, etc.).




The important takeaway message I got was, "Keep Your Brain Oxygenated At All Times. If you screw this up in any way, all bets are off. Good luck."
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Neoma Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:51 PM
Response to Original message
10. I need information on whole-brain failure here.
Not beginning to die after 4 minutes.
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leveymg Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 04:54 PM
Response to Original message
11. Less time than W's been President. n/t
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LiberalFighter Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 05:31 PM
Response to Original message
13. Wasn't Terri without oxygen to the brain for 11 minutes?
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Neoma Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 05:34 PM
Response to Reply #13
14. Thats what i heard
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Neoma Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Mar-28-05 05:48 PM
Response to Original message
15. Thanks for the info (so far?) everyone.
:P
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