Depends on how long they have been on the ventilator. After a couple of months would be reasonable
forever.... there is NO time limit
Eternity
how long did someone stay in block D in alcatraz
How long can a person stay in high school
If someone comes to visit and then plans to stay, how long do i have to put that person out?
It will stay for about how long it takes someone to eat a chicken wings.
Someone can stay in temporary housing for as long as it takes the relevant local authority to find suitable permanent housing. It is not unknown for such "temporary" housing to be lived in for a period of years.
the rest of your life.
try bathing
For life unless they get expelled by someone
Negative pressure ventilator was created in 1928.