The pulmoaide is variable pressure and has a guage so you can see at what volume and pressue the air is being moved. So with a pulmoaide I would be inclined to say as long as the guage is correct and it keeps on keeping on, continue using it. I wouldn't suggest that if there wasn't a way of testing to see if the proper volume was being moved.
Someone should build a device that can both measure pressure and volume that attaches to a neb hose to check these machines. It can easily be done if you have means of building it. Volume of air can be determined using a mass airflow sensor similar to what is on your car (same technology is used in pulmonary function tests, just more precise I would imagine) and pressure guages are quite commonplace.
I wonder if you could use one of those air plugs the hospitals connect with. You know the green ones with the ball that floats, that might be easier all together because that determines both pressure and volume to give you liters per minute. Now this is a project. I wonder if I can get ahold of one of those green oxygen plug things to play with, and how expensive are they?...
Someone should build a device that can both measure pressure and volume that attaches to a neb hose to check these machines. It can easily be done if you have means of building it. Volume of air can be determined using a mass airflow sensor similar to what is on your car (same technology is used in pulmonary function tests, just more precise I would imagine) and pressure guages are quite commonplace.
I wonder if you could use one of those air plugs the hospitals connect with. You know the green ones with the ball that floats, that might be easier all together because that determines both pressure and volume to give you liters per minute. Now this is a project. I wonder if I can get ahold of one of those green oxygen plug things to play with, and how expensive are they?...