"deep and as long as necessary"
Case study.
Had a 70 yo F with advanced dementia last year. Also with pretty bad HF, COPD and ESRD. However her dementia became so severe she would become agitated and physically fight the dialysis staff. Once she became too violent SNF sent her to my ED because the dialysis center refused to service her anymore.
Daughter is POA. Demands "full code," everything be done, dialysis to continue as scheduled. She wasn't acutely ill, mind you, the facility just refused to continue dialysis.
And therein lies the problem.
Since she really had no acute medical issue she was largely clear to be discharged the moment she arrived. Psych got consulted and played around with a few meds but the same issues kept rising regardless: fighting dialysis staff in the hospital--violently. Ultimately psych recommended she be left alone and just sedated with haldol prior to dialysis.
That plan worked in the hospital, but no SNF would take her because sedating patients for dialysis is not a viable community solution, at least in my area. All nursing homes refused her. As a result she lived in the hospital for the next three months. In that timeframe palliative care strongly encouraged the daughter to change her to DNR-CC and just stop dialysis but the daughter refused.
And so, for the next three months, she would just occupy a hospital bed. Three times a week they would sedate her and tie her to the dialysis machine. Sometimes they did not do a good job and she would still attack the staff. Hospital ethics consultant got involved at one point, but like the other two cases I've followed that involved them they were useless in making a difference. No change to plan.
What ultimately happened? She got pneumonia just sitting in a bed all day and died three days later. If she hadn't, I wonder how much longer she would have wasted valuable resources. She wasn't brain dead, she was just a confused wild animal that no one would take.
Related to above: a long time ago, back when I was dumb young I was a hardcore democrat. I was outraged at the misinformation about the affordable care act, Sarah Palin had been saying it would have "death panels" where physicians would decide who lives and who dies. It wasn't true, but a lot of people thought it was and it caused quite a stir.
I now look back on that outrage and I'm like, "wow, physician death panels. We need those."
I recognize I'm an outlier on this site. I'm very pro-euthanasia. I enjoy employment so I would never test those waters myself, but if there was a death panel I'd be first to sign up for it. The woman in the case above I'd vote to euthanize or force POA to chance code status to DNR CC and withdrawal all care. What a pointless, painful endeavor she inflicted upon her mother.
But, you know, "sanctity of life"--the phrase we use to authorize medical torture.