![Mercy hospital elderly patient](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/4/4c/Mercy_hospital_elderly_patient.jpg/revision/latest/scale-to-width-down/180?cb=20141217202554&path-prefix=en)
An elderly woman with an oxygen tent
An oxygen tent was a plastic enclosure into which oxygen was pumped, providing respiratory support for a patient.
In 1986, a kidney patient at Mercy Hospital had been using an oxygen tent. (Star Trek IV: The Voyage Home)