This is an issue that many hospitals are working through. Some of the ventilatiors need an additonal exit filter installed to assure that the virus is not circulated on exhale.
There are many types of ventilators. Some are for the more mild cases and help a patient breath easier, others add adjustable oxygen to the airway. The heaviest duty ones require a tube to be stuck (intubated) into the patients throat and do all the breathing for them.
Hospitals can use the weaker devices to keep the more healthy patients going until a stronger one can become available.
When the surge comes it will be "all hands on deck". Dr.s will use what ever is available to keep their patients alive until their own bodies can recover.
Kind of like using a space saver spare to get you home from a blowout. It is not the best tire in the world, but will get you home and buy you time until you can source and arrange a matching replacement. (know it is a bad analogy in a no spare tire Tesla, but gets the idea across.)
All of the above is very reasonable.
The problem is transparency.
If I am blind and I can't drive. So I need someone to drive me. Then a company tweets that it can! It can build a Fully Self Driving car for me!
That's the same as when my lungs go into failure, I can't breathe on my own, then a company tweets that it can build me a ventilator!
The problem with the Fully Self Driving Car right now is, I just can't command it to drive me it if I am blind.
That's the same as Tesla ventilator described above: It is not a life support machine if my lungs fail and I cannot breathe.
The good thing with Tesla Fully Self Driving Car right now is: It's pretty good for those who are not blind.
That's the same as Tesla ventilator described above: It is pretty good for those who can still breathe.
So, both the car and Tesla ventilators can still do very good things, but the communications need to be crystally clear and don't try to conceal the facts. Concealment looks bad!
Transparency, good explanation, faithful to the name of BiPAP as printed on the boxes and sales invoice would have avoided all this bad publicity.