Hi all, along with the creation of ventilators and continuous positive air pressure (CPAP) devices (and the simpler the better for those with improving reliability), has anyone thought about a simple device for monitoring their operation?
I've been looking at basing something on relatively cheap (around £10) pressure sensors that could be connected into the air line to the patient - an or .
For the ventilator, we'd be looking for a relatively slow AC signal, so would block out or subtract off anything that looked like DC, and use that to feed a CMOS 555 based watchdog style circuit. If we don't get a "decent" pulse of pressure every 5 seconds or so, then the watchdog circuit would timeout and drive an alarm.
For the CPAP, it ought to be even easier - if there's "enough" pressure there, hold the alarm off, otherwise sound the alarm.
Much as I love using Arduinos, PICs, microBits, etc, and it'd be a really small piece of software to do this, I reckon in this instance some simple electronics would be the way to go to keep it really simple.
I'm not too sure there's that much demand, but will share what I can come up with, and maybe the best idea is to tackle it with a few approaches - once we're through all this, it might be a good STEM project to set pupils a challenge based on a real recent problem?
I know that there's an awful lot of decent experience and good advice out there in the e14 community, so let me have your thoughts and feedback!