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en.wikipedia.org/wiki/Coma

Coma is a state of unconsciousness in which a person cannot be awakened; fails to respond ... Generally, a person who is unable to voluntarily open the eyes, does not have a sleep-wake cycle, is unresponsive ..... In more severe cases a coma may last for over five weeks, while some have lasted as long as several years.

www.upmc.com/patients-visitors/education/miscellaneous/Pages/coma.aspx

How long does a coma last? It is difficult to predict how long someone will be in a coma. A coma rarely lasts more than 2 to 4 weeks. But a persistent vegetative ...

kidshealth.org/en/kids/coma.html

A coma can be difficult to understand, especially because it may look like the person is just sleeping. ... brain damage caused by a lack of oxygen for too long; an overdose (taking too ... Usually, a coma does not last more than a few weeks.

www.brain-injury-law-center.com/practice-areas/coma

How long will the coma last? What can I do? This feeling of desperation is not one that any person wants to go through. No one wants to see their family member ...

www.comacommunication.com/faq.htm

(1) Can you communicate with people in coma, or other states of altered consciousness? ... (6) How long do coma and states of altered consciousness last?

www.quora.com/How-long-can-you-be-stuck-in-a-coma

Alan Hall, I helped my brother come out of a 2 year coma. ... That can depend on what lead to the situation. ... How long does a medically induced coma last?

www.nhs.uk/Conditions/coma/Pages/Introduction.aspx

A coma can also be caused by severe alcohol poisoning or a brain infection ... how long the coma will last and whether they'll have any long-term problems.

science.howstuffworks.com/life/inside-the-mind/human-brain/coma5.htm

Learn the physiological processes that trigger a coma and how often people awaken after months or even ... Most comas don't last more than two to 4 weeks.

www.tbinrc.com/coma-and-the-vegetative-state

Apr 12, 2011 ... Specifically, true coma generally does not last for more than three to ... of brain injury as well as the long-term neurologic/functional prognosis.