[CPAP] Brainstorm - VentilAid CPAP mk I

GrzesiekMy
Posts: 16
Joined: Fri Mar 27, 2020 7:09 am

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by GrzesiekMy »

pdu wrote:
Fri Mar 27, 2020 10:59 pm
Dont drink and write ;)
LOL, fixed that :lol:
pdu wrote:
Fri Mar 27, 2020 10:59 pm
Of course we can limit output pressure with some reductor.
Yup, the picture above shows a simple, improvised "reductor". But the ones used for air-powered tools, painting etc. give way too much pressure. Pressure needed is below 500mmH20 => less then 0,5Bar. The poprular and cheap reulators won't work that low. Plus, most of the home used ones are oil comporessors and trust - there's a lot of that oil in the compressed air. That's why dentists use oil-less comressors and still your not breathing with that air.

Jan Pawlik
Posts: 15
Joined: Thu Mar 26, 2020 6:49 pm

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by Jan Pawlik »

Folks,
we release a scheme, which will help to understand the principle of operation of Ventilaid working as simple CPAP.
_DSC3679.jpg
_DSC3679.jpg (186.29 KiB) Viewed 1164 times

dilip
Posts: 14
Joined: Fri Mar 27, 2020 7:47 am

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by dilip »

Great!!!! make things clear

dilip
Posts: 14
Joined: Fri Mar 27, 2020 7:47 am

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by dilip »

they say - for covid19 CPAP is not recommended - is it so???

For covid 19 - they say
Less Tidal VOlume
PEEP of 5 cmm h2o (now added in the circuit - great)
8-12 breathes per minute?

We can adjust the tidal volume in ventilaid by moving the stoppers -
by providing chokes in out put of valve we can control the speed of the piston- thereby I : E times... and also breathes per minute?
Last edited by dilip on Sun Mar 29, 2020 9:26 am, edited 1 time in total.

dilip
Posts: 14
Joined: Fri Mar 27, 2020 7:47 am

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by dilip »

new-circuit.jpg
new-circuit.jpg (80.66 KiB) Viewed 1151 times
circuit representation

Andre S.
Posts: 10
Joined: Mon Mar 30, 2020 1:38 pm

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by Andre S. »

Did you consider brushless motors for the blower?

Since the brushes wear down over time they could cause a failure at some point.
Another approach is to use redundant blowers, where the second blower starts when the first fails.

Brushless motors are also readily available since there are rc drones all over the world... maybe a bit more expensive than brushed motors.

Maciej Zarnowski
Site Admin
Posts: 29
Joined: Thu Mar 26, 2020 6:32 pm

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by Maciej Zarnowski »

Yes of course, right now we're using brushed motor, because we had one on our shelf.
Could you please suggest specific parts for brushless system? With model numbers or exact parameters.
From our findings we need something around 20W and 5000 RPM. We'd like to power it from 12V, so KV of motor should be picked accordingly.

Andre S.
Posts: 10
Joined: Mon Mar 30, 2020 1:38 pm

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by Andre S. »

Last edited by Andre S. on Tue Mar 31, 2020 8:40 pm, edited 1 time in total.

Vincenzo
Posts: 2
Joined: Mon Mar 30, 2020 9:11 pm
Location: Italy

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by Vincenzo »

Kedusme wrote:
Fri Mar 27, 2020 8:02 am
from a medical point of view is that blower a possible solution? How long patient could be ventilated by non controlled device(because how to control blower like attached before?)?
I found very clear this series of 5 medcram videos about how to use a ventilator.

Maybe can be of help to give them a look:
https://www.youtube.com/watch?v=i6hmGVBbIJk
https://www.youtube.com/watch?v=iP_jN1qAPtI
https://www.youtube.com/watch?v=K0maLgTzIto
https://www.youtube.com/watch?v=6Bdv7QhNNy4
https://www.youtube.com/watch?v=KHpJ21UWbhg
https://www.youtube.com/watch?v=Jx7oeJKzI9g

(Never thought that PEEP could interfere with heart work, or how complex regulations could be).

Hope that can help.

ollinteco
Posts: 1
Joined: Sun Apr 05, 2020 6:53 pm

Re: [CPAP] Brainstorm - VentilAid CPAP mk I

Post by ollinteco »

I believe the way to go is to use a brushless motor, (those are the ones used in commercial ventilators), DC motors used in portable vaccum cleaners does have enought pressure capability but being brushed has make them unreliable for continuos use, the one you mention in your post doesnt have enough pressure , it get only to 10 cm3 aprox.
i found that brushless motors and drivers used in drones and remote controlled helicopters are not as hard to find, not expensive and suited for high RPM, and continuos use, i've just ordered one like this (we are in mexico), but they are available all around the world.

https://articulo.mercadolibre.com.mx/ML ... delism-_JM

to test it, we are working in the meantime in find/design and impeller and a case for it.

best regards


Jan Pawlik wrote:
Thu Mar 26, 2020 11:01 pm
Hello, folks!
In this topic i would like to discuss the possible solution for designing the make-shift, yet reliable CPAP. We already have some prototype solutions, but I am more than convinced, that you may have better ideas. Surely, we will find a lot of different solutions, and probably we will sort them to three-separate classes: desperate/emergency/semi-proffesional.

Here I enclose the general idea. We want to base the idea on 32 mm polypropylene plumbing tubes.

Image

This is exemplary DC brushless blower:
https://www.tme.eu/Document/50a75551f55 ... 99_DTE.pdf

We may also consider a car blower concerning the "desperate class".

Best regards,
Jan

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