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Old 04-04-2020, 04:16 PM
The Old Coach The Old Coach is offline
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Originally Posted by country_boy View Post
Problem is a CPAP maxes out at 10” of water, so a higher water column than this is going to add lbackpressure to the lungs. And 10” isn’t going to get you good filtering , even with a huge diffuser ( which would also increase back pressure.

Would a P100/n-95 filter be an option? Yes, but the NIOSH certification measures performance at 35mm (1.5”), which is below typical CPAP pressures.

The hazard of CPAPs in a airborne. Pandemic was recognized over a decade ago. We’ve had a waver in AL to reduce the EMS standard of care in such cases. It’s not so much for the EMTs protection, but a CPAP could contaminate the entire compartment, including the insides of cabinets, it’s not impossible the unit would be out of service for hours, and many of the medical supplies would have to be trashed.
Um, just for the record, mine is set for 11 inches, and it can go a good deal higher than that. Without digging out the documentation, I'm going to say 18 inches.

And please; we're talking battlefield medicine here. Field expedients, if you must. Throw the rulebooks made by and for bureaucrats and lawyers aside. Tell us how to make it work, not why some code says we shouldn't.

Example: Tent the patient, and run a length of 4" dryer vent hose to a window-mounted exhaust fan. You can use just trash bags and duct tape in a pinch, although clear plastic would be nicer. I've got yards of suction hose from deceased shop-vacs here that would work even better.

Think, man, think!
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Old 04-06-2020, 09:49 PM
country_boy country_boy is offline
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Quote:
Originally Posted by The Old Coach View Post
Um, just for the record, mine is set for 11 inches, and it can go a good deal higher than that. Without digging out the documentation, I'm going to say 18 inches.

And please; we're talking battlefield medicine here. Field expedients, if you must. Throw the rulebooks made by and for bureaucrats and lawyers aside. Tell us how to make it work, not why some code says we shouldn't.

Example: Tent the patient, and run a length of 4" dryer vent hose to a window-mounted exhaust fan. You can use just trash bags and duct tape in a pinch, although clear plastic would be nicer. I've got yards of suction hose from deceased shop-vacs here that would work even better.

Think, man, think!
Ok, laws of physics are suspended. But are you sure your unit goes to 18 inches- that’s 45 cm? Are you sure you got the conversion right? According the the info I was given, that’s outside the range of normal CPAP approved by FDA, and more than double the standard maximum pressure (20 cm). What model is it, so I can get the info corrected.

For medical use ( in a clinic or better) you could inject oxygen, but it’s virtually impossible to sustain that sort of gas flow- you’d need 2+ full side industrial tanks a day of O2.
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