Usually a person in a coma is measured on the "Glasgow Coma Scale" 15 being wide awake, and 3 close to death, My mother suffered a massive brain haemmorage, and was in a coma for 34 days, all our family took turns to go in each day and night to be with mum, just talking to her and holding her hand, it didn't matter if she could hear us or not, it is a harrowing experience, though it was said she would never wake up, it was a worry as she was brain damaged, and would in effect have no quality of life if she survived, there is no set time to be in a coma, but after a while, medication and food was withdrawn, then eventually all fluids, it broke my heart to see her wasting away, I loved her so, and I said goodbye every day I saw her, and although the doctors said she wasn't suffering, I worried she was, I never got over losing her that way, as she was cherished and adored, for she was the biggest and most important influence in my life, and I miss her every single day, I don't know your circumstances, but I feel for you and hope you manage to endure the terrible strain and loss that may come your way, and hope your relative passes away in peace, and you and they have some kind of closure, talking about this has awful memories, but I felt compelled to write to show you some support, even though I am crying so hard at the memory of my mum's death, so good luck my friend, and God bless you and yours