I am so sorry to hear about your sister and hope she is getting better. We are not doctors on this site and we don't have enough information to give you the answers you are looking for. There could be many reasons why your sister choked, stopped breathing and is on a ventilator. Please speak with her doctor and tell him/her you need to understand what is happening to your sister. Be persistent! You have a right to know what is going on. if your parents are involved in this they must have more information so sit down and talk with them first. If your sister is not married, you don't have parents and you aren't a minor, since your sister can't speak for yourself you should seek legal advice and get Power of Attorney over your sister so you have a say in what the best treatments are available for her.
Brain death can't be determined if the heart has already stopped, this would be considered cardiac death. Brain death is determined when someone is on a ventilator (not breathing on their own due to injury or illness) and an EEG or other procedure has been completed and shows no signs of brain activity. The body will continue to "live" with the help of the ventilator oxygenating the organs, but when taken off the ventilator then the body has no impulse to breathe for itself due to the brain being dead.
Pure O2 would be best but, you would have to be able to force it with a ventilator or such.
5 minutes
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It depends on why your heart and lungs stopped; there are clinical cases of people being revived thrity minutes or more after "drowning." In general, however, four minutes after the heart stops, the brain dies of oxygen deprivation.
Answer this question… A. When a person has stopped breathing on his or her own
she stopped breathing
He stopped breathing.
he stopped breathing
he stopped breathing
They stopped breathing cause they could have heart respitory failure
Mystery Diagnosis - 2005 The Girl Who Stopped Growing - 8.3 was released on: USA: 30 November 2009