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British woman revived after six-hour cardiac arrest

bbc.com

21–30 of 174 posts

Re: British woman revived after six-hour cardiac arrest

#21
post #8

So, I still don't know if you are irreversibly dead if your brain stops all activity. I.e. is the state of your brain preserved just by the connections of the neurons? Or is the "RAM" also critical?

>Or is the "RAM" also critical?

There are cases of people without short term memory. That to me qualifies as RAM, guess its not critical to survival.

Re: British woman revived after six-hour cardiac arrest

#22
post #7

ECMO is an amazing technology that's often used in futile situations. I don't know who the ideal candidate is for it, but a young, fit, hypothermic cardiac arrest victim is pretty high up on the list

I don't know about ideal, but it saved my 6 day old son so yeah, "amazing" is totally warranted. Years later I sometimes take a look at some of the pictures we took (cameras would be forbidden in ICU soon after) and stare in awe.

This sounds like a great story - would you be willing to share it?

Re: British woman revived after six-hour cardiac arrest

#23
post #8

So, I still don't know if you are irreversibly dead if your brain stops all activity. I.e. is the state of your brain preserved just by the connections of the neurons? Or is the "RAM" also critical?

>Or is the "RAM" also critical? There are cases of people without short term memory. That to me qualifies as RAM, guess its not critical to survival.

Short term memory is more akin to cache.

The connections between the neurons is the architecture. The neurons themselves have state. If that state is wiped across the brain, I'd be surprised if the body connected to it could even still keep itself alive.

To the actual question though, neurons die/fail very quickly at their normal metabolic rate without an oxygen supply. You are certainly dead once that happens.

These procedures are all about providing some oxygen and dropping the metabolic rate to keep the neurons alive longer than they would unassisted.

Re: British woman revived after six-hour cardiac arrest

#24
It’s amazing how this phenomenon has been adapted into medical technology. When my son was born he wasn’t breathing properly and his blood oxygen levels dropped to critical levels. He was rushed to hospital and the first thing they did was cool him to 34c to reduce the risk of brain damage. He made a full recovery. I dread to think what would have happened without the cooling.

Re: British woman revived after six-hour cardiac arrest

#25
post #11

Earlier quoted context omitted.

When your brain doesn't get oxygen it will die. See https://en.wikipedia.org/wiki/Cerebral_hypoxia

It's more then that in this case. She had not vital signs at all, heart not beating and providing oxygen included.

The brain was provided oxygen, just not by her heart.

Re: British woman revived after six-hour cardiac arrest

#26

It’s amazing how this phenomenon has been adapted into medical technology. When my son was born he wasn’t breathing properly and his blood oxygen levels dropped to critical levels. He was rushed to hospital and the first thing they did was cool him to 34c to reduce the risk of brain damage. He made a full recovery. I dread to think what would have happened without the cooling.

Why not cool the patient before rushing them to hospital, if the technique is so widely applicable? It could easily be made a standard feature of emergency medical services.

Re: British woman revived after six-hour cardiac arrest

#27

It’s amazing how this phenomenon has been adapted into medical technology. When my son was born he wasn’t breathing properly and his blood oxygen levels dropped to critical levels. He was rushed to hospital and the first thing they did was cool him to 34c to reduce the risk of brain damage. He made a full recovery. I dread to think what would have happened without the cooling.

Why not cool the patient before rushing them to hospital, if the technique is so widely applicable? It could easily be made a standard feature of emergency medical services.

Maybe the training of the emergency crew is not sufficient?

Re: British woman revived after six-hour cardiac arrest

#28
post #8

So, I still don't know if you are irreversibly dead if your brain stops all activity. I.e. is the state of your brain preserved just by the connections of the neurons? Or is the "RAM" also critical?

Lightning strikes don't wipe people's personalities. Also during epileptic seizures people's neurons fire in abnormal ways, but then return to normal afterwards. So I'd say that the RAM isn't critical; humans can boot from disk.

Re: British woman revived after six-hour cardiac arrest

#29

Earlier quoted context omitted.

Why not cool the patient before rushing them to hospital, if the technique is so widely applicable? It could easily be made a standard feature of emergency medical services.

Maybe the training of the emergency crew is not sufficient?

Why not improve the training?

Re: British woman revived after six-hour cardiac arrest

#30

It’s amazing how this phenomenon has been adapted into medical technology. When my son was born he wasn’t breathing properly and his blood oxygen levels dropped to critical levels. He was rushed to hospital and the first thing they did was cool him to 34c to reduce the risk of brain damage. He made a full recovery. I dread to think what would have happened without the cooling.

Why not cool the patient before rushing them to hospital, if the technique is so widely applicable? It could easily be made a standard feature of emergency medical services.

Because it's hard. I helped out at a company among many that are trying to develop a system that would allow you to do this in ambulance and they started testing prototypes 10 years ago and have yet to progress from that stage.
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