Comments on: Electronics and Control https://vandyvents.com An Emergency Automated Bag Valve Compressor in Response to COVID-19 Tue, 14 Apr 2020 04:09:53 +0000 hourly 1 https://wordpress.org/?v=5.4 By: vandy9 https://vandyvents.com/electronics-and-control/#comment-5 Tue, 31 Mar 2020 23:18:42 +0000 http://gator3208.temp.domains/~vandy/?page_id=26#comment-5 In reply to Mark Denison.

The physicians on our team have indicated that it is important to be able to choose the ratio of inhale to exhale in a single breath. Typically inhale will be faster. 1/3 of the time for inhale and 2/3 for exhale is a good nominal starting point, from what we’re hearing. But the physicians would like to be able to adjust it for a given patient. We provide them with a knob attached to a potentiometer to enable that.

]]> By: Mark Denison https://vandyvents.com/electronics-and-control/#comment-4 Tue, 31 Mar 2020 13:45:04 +0000 http://gator3208.temp.domains/~vandy/?page_id=26#comment-4 Relationship of bag to plunger can be adjusted to change tidal volume.

Question – Since I do not have the ability to program myself – can an adjustable power supply be used to change the CPM count of the motor. The motor will drive only in one direction.

That would have the same rate for intake and exhale – but that is the only drawback I can see – but I think this would make a much simpler to device to build and use.

Is a variable I/E ratio a must for the device to be useful?

]]>