OpenVent-Bristol COVID-19 ventilator rapid manufacture BVM bag valve mask ambu bag £80 build

[@staticrave]

Terrific start! We are creating one utilizing electric cylinders but Ive always been partial to your mechanical movement. Very nice job. Looks great!

[@HassanAli-rq2xd]

I like it. It's one of the greatest designs I've ever seen! Good job Darren :)

[@rizal1974]

Pulmonologist doctors requires AC mode or assist mode in this type of low cost ventilators wherein it has respond with the breath of the covid patient. There should be a trigger signal from the patient otherwise the rhythm of the breath will not be in sync and may cause further health issues. We made one already and this is our problem now.

[@00lewisd1]

Thanks for your message. I plan to create an assistive mode soon. Interesting that you have done this already, do you have any details of your project that I can view? The problem I have with creating an assistive breathing mode is that there is no test for measuring the success of it in the MHRA document

[@basegiratoriaelectricausor4141]

DE VARIAS ALTERNATIVAS QUE HE VISTO, QUE CONSIDERO QUE ESTE ES EL MAS VIABLE, EXCELENTE.

[@josemartincardoza537]

Gracias por contribuir con este gestó humanitario para el bienestar de la salud. Éxitos en tus proyectos.

[@brandongibson6757]

Hey, so I was remaking this machine and I came across an issue with the motor arm. When it presses down on the BVM Bag it doesn’t come back up properly. The motor will just continue to press down on the bag. I am using a acyclic motor arm but I think it’s something else that’s giving it an issue. I would love to get some help on troubleshooting this problem. Have a great day and thanks in advance.

[@addin3d]

Great approach.clean design.

[@robertmawanda]

Wow, thanks for sharing this concept. Excellent!

[@soumyadeepnaskar7878]

That's great Darwen.... Love from India ❤️

[@ameersamiy]

Good job and just easy to treat noise issue

[@Nekto368]

Thank you for your work. But, this is just a hand protection for the Ambu bag. To ventilate people with pneumonia, you need a more delicate work of the respirator, different type of air supply, Peep. I'm not talking about monitoring ventilation - it is necessary if the patient is ventilated for many days. In addition, you need a good humidification of the air mixture.

[@tonysicily2687]

Nikulin Alex do you have any actual stats you can share. There are people dying because of the lack of available ventilators. I know it will not replace a $30,000 unit, but it it saves a single life, is it not worth it?

[@sachitwijesinghe3344]

Hi Darren. You have definitely done your research. The peep valve is an excellent idea and I like how your motor assembly is attached to the housing. I am working a system that would ideally work with your system to trigger the ventilator based on an assist control mode. That would reduce the risk of barotrauma. Great work!

[@00lewisd1]

Sachit Wijesinghe how did you get on? Can you post your progress? Have you seen our 2nd design with pressure and flow sensing? kzbin.info/www/bejne/iHqunpdnoqqMnZY

[@ramirosuarez9537]

Well done. Now a little more of effort trying to make it more quiet, the sick one will be needing to rest. Congrats!

[@geraldozambrinjunior4667]

This is the way!!! congratulations !!!!

[@joseraulruiz6279]

Congratulations darren

[@nevillecreativitymentor]

I am fairly sure that you are considering a cutout (if needed a gate) such that you just drop in the Bag and also quickly remove it for manual handling ...rather than fiddle it in ... just saying . Very nice work so far. Cheers bro.

[@00lewisd1]

Neville Rodrigues thanks. Have you seen our second design? kzbin.info/www/bejne/iHqunpdnoqqMnZY

[@nevillecreativitymentor]

@@00lewisd1 Thanks for the update ... I love your new design

[@DavidJones-fr9zw]

Well done mate.

[@ismailhossain7897]

it is the greatest designs i've ever seen,,, Can I get circuit diagram of it or simulation..how to connect it..please please help

[@murzabaev]

Great development, Darren! It is designed in the simple way so people can re-produce it, which is very critical for that purpose. If you allow me, I would suggest you to attache a potentiometer to the geared motor shaft as shaft angle sensor so you can better control the airflow. Your control system looks a bit complicated; you could suggest is based on H-bridge (which is relatively simple and people may find H-bridge chip in their local component stores), and all your control knobs/potentiometers directly connected to arduino. This way more people can re-produce the ventilator. Keep this good job up! I wish you great success! P.S. one more question: how are you going to modify it to connect your pressure module?

[@00lewisd1]

Thanks for sharing your idea. I did think about the POT Vs the current sensor, but went for the current sensor in the end to save on extra mechanical parts and seeing as the current sensor is included in the standard motor driver shield. I am planning to include a pressure sensor to maintain the correct pressure and sense failure.

[@abdelhakimsahour4283]

good work. can i replace the dc motor with a stepper motor

[@00lewisd1]

Hakim Sahour unfortunately no, not in this design, a stepper is unlikely to have the stall power required

[@JamCluster]

Great job friend !!!!

[@sTaLizyJC]

Amazing! I'll be sharing!

[@victorm.ottatig.4706]

Great Design

[@johanpinzonpardo2468]

Hi, kindly recommend, Fail-Safe operation - If the machine fails, a clinician must be able to immediately shut down, open the device manually, remove the bag and convert to manual bagging.

[@tonysicily2687]

JOHAN PINZON PARDO exactly, the ones I have seen (that are going for full approval) have bio feedback systems and dual control systems built in. Any failure of the control circuit, a simple switch changes over to a new duplicate circuit in less than a second, the faulty circuit can be replaced with zero interruption of operation.

[@gastonindustrialdesign]

Great work!

[@petermaniche1009]

Your real good men...

[@mostafapeysokhan2704]

looks perfect!

[@jimmypatel9714]

Dharren what is the purpose of while balloon at the end of flexibile vessel?

[@ShowTVMarocofficial]

good job bro

[@dattanaik9554]

Hi, have you tried the design with a test lung? Generally you'll get more load on the motor hence proportional increase in current depending on load increase. This may change the calibration of settings in your code. Also'll need a pressure safety release valve.

[@00lewisd1]

datta naik thabks for your comment. I am using a test lung of sort (I can’t get access to a proper test lung so I’m using the expansion balloon from a waters circuit). Over pressure valves which are compatible with BVMs already exist, so it should just be a case to add one of those I think

[@sachitwijesinghe3344]

I do have one question regarding your ventilator. Does it have the ability to adjust the Inspiration Expiration Ration (IE ratio)?

[@00lewisd1]

Yes, this is in the more recent video: kzbin.info/www/bejne/iHqunpdnoqqMnZY

[@brandongibson6757]

@@00lewisd1Hey can you read my comment?

[@rameshsathyaramesh5249]

Where you get electronic control board??

[@muhammadumais1645]

Can anybody help me with the breathing circuit complications and the ISO standards implementation for the bio-compatibility.

[@namrathapallela6005]

Can I get circuit diagram of it or how to arrange component and wiring diagram please I need it fast ??

[@00lewisd1]

pallela Namratha please find this via our website for our new design. Let me know if I can help with anything else openventbristol.co.uk

[@mixme8655]

thank you sir

[@mariangulo4457]

Which specific motor does it use??

[@00lewisd1]

Mari Angulo it’s from the 942D series from como with the 500:1 gearbox

[@tonysicily2687]

Is there an update available? You have talked about extra features, did these get added?

[@00lewisd1]

Tony Bickley aiming to have another video out over the weekend

[@tonysicily2687]

Darren Lewis Fantastic, I will look out for it, hopefully the subscribe notification will work 🤞

[@mamadoubobodiallo1617]

What are the specs of the pressure sensor you are going to use?

[@00lewisd1]

Mamadou Bobo Diallo it’s the MPX5010 differential sensor. Tops out at 10kPa

[@rtos]

Appreciate your excellent no-frills design, which is what is needed at the moment for a low cost model. Couple of questions- since your geared motor seems to be working open loop- in one direction you limit it by sensing the current flow through the motor. How is it returning back to the start position without feedback? Secondly how did you select this geared motor, any particular parameters relating to the torque or compression needed in this application; also what is the probably lifetime of this motor, especially if its put into strenuous use at say 30 compressions per minute?

[@kaiser2400]

Dear Darren, I couldn't find the DJ Shield anywhere in my city. Is there any alternative ! Can I use normal potentiometers or controllers instead of the DJ Shield ? Please please help me. I will be extremely grateful for your help 💙💙💙💙💙

[@00lewisd1]

KÄISER yes you can use normal buttons and potentiometers as long as you wire them to the same pins

[@kaiser2400]

@@00lewisd1 Thank you bro Darren for your response. You're really great. 💙

[@kaiser2400]

I have the worst luck in the world 😑 .. I ordered a DC motor like yours, but a stepper motor was sent to me ..! I do not know how to program it ! Can I find a code for stepper motor ? Please bro Darren, help me 😓💙 I spent a lot of money, I want to succeed in my project. I hope that you will help me Mr. Darren.💙

[@kelik94]

Does it support PEEP?

[@00lewisd1]

Petrus Sutyasadi yes it does. Please see our second design: kzbin.info/www/bejne/iHqunpdnoqqMnZY

[@vicentesibaljr3568]

Is this project accurate and calibrated and approved by FDA?

[@00lewisd1]

vicente sibal jr it’s not FDA approved and this is only the first design so doesn’t produce accurate results. Please see the latest version which has better performance, this was tested using a test lung: kzbin.info/www/bejne/iHqunpdnoqqMnZY

[@00lewisd1]

Hi all, please see the latest version of my design in this video: kzbin.info/www/bejne/iHqunpdnoqqMnZY and the published design here: www.instructables.com/id/OpenVent-Bristol-V20-COVID-19-Rapid-Manufacture-Ve/

[@milindsoparkar242]

what abt tidal volume/ rr/ pi monitoring

[@00lewisd1]

milind soparkar this is available in our second design: kzbin.info/www/bejne/iHqunpdnoqqMnZY

[@jeanpaul-ramseslangouo1986]

please, the caractéristiques of the motors! power, bending?

[@boarderlinesk8media433]

Under rated video, thanks for the info. Hope you haven't used it yet!

[@nicolasc4468]

Jeez Karen chill out he’s trying to save live not end them

[@HQ_Nextpcb]

Hey, so nice project. Would you like to get a sponsor about this video?

[@00lewisd1]

NextPCB yes I’m very interested in your offer. Please can you message me via my website to discuss? Very sorry for the delay in responding, I have been very busy with the next design, please see here: openventbristol.co.uk

[@pawansharma-mc9wr]

Which card is this card's name, I want to know its full function

[@rahimonline7034]

Can I get the circuit diagram please ?

[@00lewisd1]

please check the instructables link

[@mazam2014]

Wonderful - but big companies will never like it .

[@knowledgeispower2998]

hi man fist of all i should great idea i from afghanistaan we nedd this dvice my qauestion is that how to make the frequency and preasure controler i have the motor but i dont know how make the handle please please please tell me how i can made thanks

[@00lewisd1]

Please see design guide in this link: www.instructables.com/id/COVID-19-Rapid-Manufacture-Ventilator-BVM-Ambubag-/

[@soulrobotics]

Sounds like the MIT ventilator project with Arduino...

[@tobdju7868]

Todo las ideas buenas. Malo es que nunca se usaron.ni para emergencia.

[@KILLER_BEAN_UNLEASHED_FOREVER]

👍

[@juliancardonaduque]

Great!!! Look this other solution.

[@juliancardonaduque]

kzbin.info/www/bejne/iIeyn5Run9GDfZI

[@arifshaawn6874]

Great

[@dreamtoreality5605]

Nice

[@gonzores]

capo!!!

[@mannatuu]

Love it but its not a DIY solution. DIY is bits of plywood, 2 x1's , windscreen wiper motor and a cheap and cheerful 12 volt Ac/dc transformer and variable speed adjuster . All cheap and cheerful off Ebay . Other than that I love it !!

[@00lewisd1]

JK. SEP it’s safety, reliable compliance with the requirements and low chances of FDA approval that I would be concerned about there. (I’m certainly not suggesting that my design is safe yet, we’re still working on it)

[@mannatuu]

@@00lewisd1 Yes I do understand that Darren. Your trying to make a serious contribution. I'll be posting mine in the next day or so . I am just waiting for something to arrive off eBay and then I'll put it up and give you the link to make comments.

[@diginto76]

Hi there. Congratulations. Well done. I hope you can also figured out give us idea about how to attach a monitor and sensors to give us information about dependent variables like Peak pressure, platue pres., Alarm for leak. Etc. Can you share your email with me?

[@00lewisd1]

Mohammed Yousuf these functions are included in our second version here, we are working on a 3rd version as well kzbin.info/www/bejne/iHqunpdnoqqMnZY

[@Gerardo3491]

Eso no es un ventilador ni de chiste

[@Vaibhavmalviyaofficial]

Great work!!

[@DjVaibhavPhaltan1111]

Nice