How long can someone survive in a coma? – Secondary 11

Question: How long can someone survive in a coma?
- Keywords:
  coma,
  survival
Asked by fusrodah to Jemma, John, Katie, Lisa on 26 Jun 2012.
- Jemma Ransom answered on 26 Jun 2012:
  
  Hi @fusdorah,
  
  it depends on what is causing the coma. If it is the case that there is brain damage resulting in unconsciousness, but there is still brain activity, it is possible that someone could survive on life support indefinitely.
  
  Jemma

Question: How long can someone survive in a coma?