“Open Source” Ventilator Project by University of Florida

The spirit of all of this inspiring, however: I worry that a lot of these efforts are actually going to be detrimental to their intended causes.

We're talking about potentially needing hundreds of thousands of these things. That's hundreds of thousands of pressure transducers, pumps, control circuitry, tubing connectors, and potentially millions of feet of pneumatic tubing.

As much as we're looking at a design problem, we're looking a supply chain problem. What I'm worried about is that thousands of hackers are currently buying up what could be valuable components for their prototypes, when they should be making those components available for mass producing an existing commercial design.

If you are hacker and want to help the problem: the hospital systems need you to make face shields. That's what they're asking for. If you are in the Phoenix area and can assist in printing the prusa face shield parts (https://www.prusaprinters.org/prints/25857-prusa-protective-...) please send me a DM to $username@gmail.com

We are currently coordinating the local effort with the hospital systems here.

Registered Respiratory Therapist first-time post here

Siemens Servo 900 Ventilator C/D/E consists of two separate units Electronic/Pneumatic driven.

Best for intensive care situations, but works in transport and anesthesia, Neonatal, pediatric, adult.

Interface panel settings with rotary dials. No GUI. When I was talking with Seimens sales rep, he said the original design was intended for anesthesia to make fine grain settings.

The design is excellent. I've used both C/E myself, 16 units per shift for three straight weeks 2006.

I've seen DIY vents floating around, if people are willing to go out on a pandemic limb, use something already proven.

servo 900c post test panel display [video] https://www.youtube.com/watch?v=2d2uciOwlwY

The c/d/e series have similar parts in a pandemic situation interchanged.

The inner components are easy to access lift the top cover exposes all the working parts that allow quick repair and cleaning.

Units can be found in the US, UK, and EU on eBay and refurbished medical suppliers. https://www.bemesonline.com/siemens-900c-ventilator/ Siemens 900C Ventilator refurbish

https://www.ebay.com/c/24004926166 900E $499.99 / 900c $450.00

https://www.ebay.com/c/1410306550 900c "spare parts only" $195.00

blog post: https://siemensventilator.blogspot.com/2010/06/siemens-servo... volume control with sight, pressure controlled, SIMV+ pressure support, CPAP

Might contain more links than usually allowed; I'm trying to point out there are many to be found we do not have to reinvent one. There might only be a few hundred, but they can be ready now.

The vent to room air even with a hepa filter is a tiny bit concerning, anyone present should be aware of the risk.

In a hospital, exhaust is (usually) sent to the scavenger for additional filtering and safer output area.

https://en.wikipedia.org/wiki/Scavenger_system

That is why you don't use a CPAP at home with anyone else present because it will aerosolize any infection.

This is another project, simple but in a an advanced state of development. An automated manual AMBU type ventilator that uses a windshield wiper motor:

https://www.oxygen.protofy.xyz/

There are two versions: makers and mass industrial production.

This is a crazy. The US (Connecticut) used eminent domain to seize people's houses to give them to a pharmaceutical company. They can use it to seize existing ventilator designs and publish them.

Finally a proper design with proper engineering and reliability testing. Also, no 3D printing nonsense (which makes production of high volume components non-viable).

There are a number of similar projects among the flood of ventilator threads, if anyone wants to compare:

https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

It seems that all of the recent ventilator projects require intubation.

Have there been any non-invasive ventilator projects?