We have 1 PAPR for the anesthesia department that we are using to intubate patients, and so far, barely enough N95 to get by - with us re-using them. We do double mask with a normal OR mask outside the N95 mask to prevent them from getting soiled. And it's not the easiest thing in the world to put on two different types of OR masks, on top of glasses, and hearing aids, and finally a face shield, gown, double gloves. But we're not whining. As we've always said, it's better to be vertical than horizontal in the OR.
The OR patients who are Covid-19 positive and don't know it are the ones presently worrying us. Our procedures are evolving on a daily basis as we learn more, and McGyver the best we can. And we are not getting bombarded like the NYC area is. We all know it will get much worse, very soon. Fortunately, I work with a very talented, dedicated staff.
That Stanford article linked above is extremely important regarding how to re-sterilize or more importantly how not to. Alcohol kills these masks. Do not use that. It reduces filtration efficiency very significantly.
We will be switching over to UV light to re-sterilize ours. But the oven at 70C for 30 minutes looks very doable, and appears to not appreciably degrade mask filtration efficiency, as Alan noted above.