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greetings and thoughts from an anesthesiologist

 

Hi team,

I'm an anaesthetist (in America you'd call me anesthesiologist) and a bit of a geek. Not a ventilator expert but I have a few thousand hours as a user.

I love the simplicity and robustness of your design. I've been thinking about this challenge for about a week, and I've had many thoughts!

So I which lays out what I believe engineers need to know about moder ICU ventilators capable them of treating COVID19 ARDS patients and getting them weaned.

I really think what you have done is a very clever potential core of a high spec rapidly deployable ventilator. The the final features will be critical.

I'm hoping to foster cross team cooperation and sharing, to this end I've tried to . I'm hoping this document can evolve into a bit of component level index page pointing off to different resources.

Hope these documents help your team, and I'd love your feedback. And happy to take questions (ideally as comments on these documents)

best wishes
Erich

Erich Schulz,?mbbs, mba, fanzca
0410 277 408
 

Thank? you, Dr. Schulz? -- I read and/or skimmed the document (and I practices anesthesiogy for 30 years).
At the moment the design we have here is pretty simple but now has airway prssure and expiratory flow (not yet calibrated) measurement.? (UF needs to solve their liabillty issues, which they are working on, before they will gain that capability).

Because the system has measurements of both airway pressure and flow, and has electronic control of inspiration (and mechanical control of PEEP) it can grow to have the types of flow controls you mention -- we can sense the initiation of breathing by the patient through either flow OR pressure and assist -- and the assistance can grow to have pressure control (requires some feedback design that isn't done yet).? ??

Because of the delays introduced by various factors, I doubt we will have all of that by Friday and I don't know if the UF team will even have a passable version to present to the FDA (particularly if they lose their primary controller software as it seems may happen if they don't deal with the liabillity issues!) -- but they COULD hve a very nice design quite soon.? ?I expect the discussion with the FDA to go over a week and during that time considerable improvement could be made.? ?

Thank you for your contribution.
Gordon L.? Gibby MD
 
Edited

Thanks for sharing your expert opinions .

Can you advise if there is any equipment or process that can perform continuous oxygenation of blood ?to support the patient if lungs are breaking down ?

would that process also allow stripping out of CO2 ?

further , are you aware if lavage has been attempted on a patient whose ARDS has reached near terminal condition ?
 

Hi Sydney,?

I'm reluctant to get off topic, but you want to read about ECMO.

Yes lavage has been tried. Many clever people have all kinds of things to save people with ARDS. Maybe have a read about "proning" if you're curious.?

The Ventilator design I specified meets the needs of current best practice, reliability and failure safety.

Cheers


On Sat., 11 Apr. 2020, 1:50 am , <sydneygold888@...> wrote:

[Edited Message Follows]

Thanks for sharing your expert opinions .

Can you advise if there is any equipment or process that can perform continuous oxygenation of blood ?to support the patient if lungs are breaking down ?

would that process also allow stripping out of CO2 ?

further , are you aware if lavage has been attempted on a patient whose ARDS has reached near terminal condition ?

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