My wife is a respiratory therapist working in an academic medical center in the USA. She works daily with Covid 19 patients performing roles such ventilator management or assisting with intubation.
As a result of the rapid rise in hospitalizations due to the highly contagious delta variant of the covid virus, ventilators are quickly becoming strained and hospital management has stated that coventilating multiple patients on a single ventilator may be necessary if situation worsens. Per a joint recommendation from organizations representing anesthesiologists , critical care physicians, and respiratory therapists last March, shared ventilation should not be done due to such practice being unsafe.
I am trying to help my wife with this stress with the following questions. When I asked the work aspects of this question on The Workplace SE, majority of the answers stated that hospital administration most likely accepted already the risks of shared ventilation so my wife's chances of change are limited.
If shared ventilation becomes necessary, how is it decided which patients are selected to share a ventilator?
How are the risks of doing do mitigated other than by not sharing a ventilator?