Confirm What is Needed

[brentjackson]

Need to speak with medical professionals to determine which of the materials used for intubation is likely to be in short supply. (It makes no use to develp a complex laryngoscope if what is truly needed is a supply of bag ventilators, sterile breathing tubes, etc.

[brentjackson]

I had a few phonecalls with relatives in the medical profession last night. They indicated that it was the number of breathing machines (mechanical ventilators) that are likely to be in short supply. I found some news articles supporting that concern. To quote my sister, "It makes no sense to intubate someone if you don't have the breathing machine to hook them up to."

So I did a little renaming of the project to OpenRespirator and have started pushing in that direction.

As these are more complex, electromechanical devices, we will need collaborators with microcontroller experience (I have some basic experience as a robotics hobbyist).

I do think we should shoot for MVP (minimum viable product) capabilities, versus something more robust, in order to keep complexity down and be able to produce more.

[gil2rok]

I would recommend looking at the helpful engineering slack channel. It is a group of almost 10k engineers trying to come up with DIY and 3d printed medical equipment to help fight corona. Right now it's definitely a bit of a mess and not very organized, but it seems to have a lot of momentum. Project proposals were due tonight and finalists will be released in 48 hrs. If you're interested, I recommend taking a look: https://helpfulengineering.slack.com/

[stephenflashtech]

I am not too familiar with the GIT HUB process but I just fast tracked 2 designs done in a 3D modeling software. My immediate direction is to come up with 2 designs that can be 3D printed. I thought about this the most and with an entire lock down of the country coming soon the supply chain is going to come to a halt. It would seem if we can come up with a printable design then we can send this to anyone in the world with access to a 3D printer. They can print these and bring to wherever is needed. This will also allow us to scale fairly quickly if we can get enough people willing to print these.

Immediate Design Ideas:

1) Is to make a premade 4 to 1 splitter. I should be able to scale this down in size which will help with material and transportation cost.

2) is to make another design that is just the 2 to 1 splitter with the coupler. This way this design can be used to build a 4 way splitter as well if need be.

I should hopefully have this done in the next 48 hours. I had to guess at the size of the fittings based upon what I could find on the web. I think the outer diameter is 22 mm and the inner is 15 mm. this is what is being designed right now. If this is wrong its not a problem we just need the correct measurements. This is very crucial so if you can provide this it would be great.

What I really need:

A) someone who is a medical professional that has access to a ventilator so this can be test fitted.

B) someone that has good general knowledge of 3D printers that is hopefully near this medical professional. So if we need to make changes I can send over new files immediately.

C) someone with as much knowledge as possible on ventilators and Pulmonary Medicine . I have a ton of questions and ideas I want to bounce off of someone. one of the concerns seems to be the danger of having 4 people on one machine as they all have be a similar size, have similar issues, and lung capacity. I am not sure how possible it would be to potentially have an external valve that could "bleed" off air on each individual connector. So pretty much a crude way to try and tune in the air needs of each person. I have no idea if this is possible or what the medical ramifications are.

I uploaded the paper that was written by the Dr and her colleague in the video. I have uploaded it to my google drive and you can access it here https://drive.google.com/file/d/17zSPC-DHtfqgoMgxpP24fzv9shIs3Adm/view . The two Dr's names are Greg Neyman, MD and Charlene Babcock Irvin, MD . I would do everything in your power to contact these people and get them on board. Clearly they will have the most knowledge and can assist and or test these products for us.

Let me know how quickly you can try and wrangle these together and I will focus on getting my part done as quickly as possible

As you can see the measurements are the most crucial item on my list right now. I have searched for hours online and still do not have a concrete answer. I even called the manufacturer and they did not know! on uptodate.com I found "Circuit tubing — The ventilator circuit tubing is generally corrugated plastic (22 mm inside diameter for adults), which has universal connectors (22 mm outside diameter, 15 mm inside diameter) that connect the ventilator to the endotracheal tube (ETT), tracheostomy tube, or noninvasive interface"

This helps but the connectors you are showing look slightly larger then that. I had my fiance Sarah (nurse practitioner) bring me home a Hudson RCI Micro mist Nebulizer kit so I could take some measurements. hopefully you can help me confirm the measurements of the opening and connectors. below are some images with measurements.

measurements 1

measurements 2

In the mean time below is a prototype made in solidworks of the basic t connector designed with 15 mm inner and 22 mm outer dimensions. Before I finalize this and move on to the 4 to one 1 connector I would really need confirmation of the measurements.

t connector.png

[stephenflashtech]

I would recommend looking at the helpful engineering slack channel. It is a group of almost 10k engineers trying to come up with DIY and 3d printed medical equipment to help fight corona. Right now it's definitely a bit of a mess and not very organized, but it seems to have a lot of momentum. Project proposals were due tonight and finalists will be released in 48 hrs. If you're interested, I recommend taking a look: https://helpfulengineering.slack.com/

how do i get an account there?

[kyranf]

G'day - I'm a robotics engineer with extensive experience in electronics design (circuit design, PCB design, firmware/microcontroller circuit design and programming them). Once we (Who? When?) determine the functional requirements for minimum viable product, I can assist with the electro-mechanical system design and designing a circuit schematic and circuitboard using KiCAD (popular free, open source, electrical design software) and also write the appropriate Arduino code to operate the machine if needed.

It should be noted that the machine, from what I can tell, can be made with discrete components and does not necessarily need a microcontroller. If all it does is rotate a cam-shaped mechanical device to oscillate and compress a balloon or similar diaphram for forcing airflow, it can be a simple circuit.

note: https://news.mit.edu/2010/itw-ventilator-0715 is a box to enclose a manual respirator bag and do automatic motion to compress it. Found from this post (which links this repo btw) https://www.3dprintingmedia.network/forums/topic/open-source-respirator-projects/

[erosmarcello]

I’m currently an AI consultant at University of Phoenix - and given the remote nature of the student body (which includes medical tracks) and now a remote workforce, I can post our needs for this on the UOPX staff and faculty Slack, as well as my own personal and professional networks, which are diverse - I’ve also worked on AI for Cigna, GlaxoSmithKline (GSK), Mayo Clinic, etc. so hopeful to recruit relevant talent or st least glean key insights/guidance for our purposes.

Can anyone give me a succinct, bullet proof list of precise expertise or titles needed?

[vinnie90]

Have we figured out if the measurements are correct?

[stephenflashtech]

according to Oschner all of the fittings are correct.

On Sun, Mar 22, 2020 at 10:54 AM vinnie90 notifications@github.com wrote:

Have we figured out if the measurements are correct?

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