dr. ira byock: miss klish. it's dr. byock. >> kroft: marcia klish is either being saved by medical technology or being prevented from dying a natural death. >> byock: we're just here checking on you. >> kroft: she is 71 years old and suffering from complications of colon surgery and a hospital- acquired infection. she's been unconscious in the intensive care unit at dartmouth-hitchcock medical center in lebanon, new hampshire, for the better part of a week. one of her doctors, ira byock, told us it costs up to $10,000 a day to maintain someone in the i.c.u. some patients remain here for weeks; one has been here for six months. >> byock: this is the way so many americans die; something like 18% to 20% of americans spend their last days in an i.c.u. and, you know, it's extremely expensive, it's uncomfortable. many times, they have to be sedated so that they don't reflexively pull out a tube, or sometimes their hands are restrained. this is not the way most people would want to spend their last days of life. and yet, this h