On Sat, Apr 18, 2020 at 06:47 PM, Steve S wrote:

What is the current proposed method of O2 introduction?

The primary project on this group is using a compressed O2/air mixer device that is apparently part of the normal things around a hospital.

Here is a post that suggest the possibility of using a fuel injector as a valve that can be pulsed at a rapid rate. If a regular solenoid valve was not fast enough to provide small enough bursts of air/O2 for easy mixing.

/g/VentilatorDevelopers/message/1609

Tom, wb6b

To be honest, I haven't seen any high pressure O2/Air blenders that are not incorporated into ventilators. The standard method of blending is to use flow regulators

I'm waiting for the UQ hackathon students to publish their projects but several of the 33 teams did look specifically at the challenge of fabricating such a device.

Erich Schulz,?mbbs, mba, fanzca

0410 277 408

On Sun, 19 Apr 2020 at 12:11, Tom, wb6b <wb6b@...> wrote:

On Sat, Apr 18, 2020 at 06:47 PM, Steve S wrote:

What is the current proposed method of O2 introduction?

The primary project on this group is using a compressed O2/air mixer device that is apparently part of the normal things around a hospital.

Here is a post that suggest the possibility of using a fuel injector as a valve that can be pulsed at a rapid rate. If a regular solenoid valve was not fast enough to provide small enough bursts of air/O2 for easy mixing.

/g/VentilatorDevelopers/message/1609

Tom, wb6b

On Apr 18, 2020, at 22:54, Gordon Gibby via <docvacuumtubes=[email protected]> wrote:

?Our respiratory therapists have them routinely if memory serves me correctly ? Here is an example Of one on the market that I found by googling— I found several ?

<image0.png>

On Apr 18, 2020, at 22:52, Steve S <skol0016@...> wrote:

?Yeah, that's what I was thinking. The only external device I can think of is a high flow nasal canula system which might be able to provide adequate flow for a ventilator and might be readily available.?

They look very suitable Gordon, just checking that someone has checked stock levels/delivery times for these?

Erich Schulz,?mbbs, mba, fanzca

0410 277 408

On Sun, 19 Apr 2020 at 12:56, Gordon Gibby <docvacuumtubes@...> wrote:

On Apr 18, 2020, at 22:54, Gordon Gibby via <docvacuumtubes=[email protected]> wrote:

?Our respiratory therapists have them routinely if memory serves me correctly ? Here is an example Of one on the market that I found by googling— I found several ?

<image0.png>

On Apr 18, 2020, at 22:52, Steve S <skol0016@...> wrote:

?Yeah, that's what I was thinking. The only external device I can think of is a high flow nasal canula system which might be able to provide adequate flow for a ventilator and might be readily available.?