tag:blogger.com,1999:blog-2217393939875576576.post2897781136077074843..comments2023-09-12T11:52:39.482-04:00Comments on Pandemic Ventilator Project: Design for a Positive Pressure Pandemic Ventilator Dreamerhttp://www.blogger.com/profile/13701195188549081875noreply@blogger.comBlogger39125tag:blogger.com,1999:blog-2217393939875576576.post-90758111230380861362020-03-31T17:05:35.995-04:002020-03-31T17:05:35.995-04:00Do you need some type of differential pressure sen...Do you need some type of differential pressure sensor?<br />Anonymoushttps://www.blogger.com/profile/05199672480143732327noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-12265852311930272352020-03-27T06:27:38.484-04:002020-03-27T06:27:38.484-04:00I read a couple of papers recently including:
1)&...I read a couple of papers recently including: <br />1)"Modelling the ventilator-patient interaction:<br />a pressure-cycled control strategy"<br />2) "https://link.springer.com/article/10.1186/s40635-018-0195-0"<br /><br />I assume you have a way to model the patient's lung , perhaps with spirometry readings.<br /><br />I think the basic problem is that the lung must be part of the system as a whole - you could call it the "load". The characteristics of elasticity of the lung will affect the pressure wave. Perhaps input could be gentle at first to measure the system response from the patient's lung, then a system model could be dynamically deduced in controller software.<br /><br />There is a MATLAB model :<br />https://www.mathworks.com/help/physmod/simscape/examples/medical-ventilator-with-lung-model.html<br /><br />That looks very promising as it gives you output as waves, also allows you to set Otis frequency and to change the lung model. <br /><br />Often systems have a digital controller running alongside the hardware, giving estimations for the expected output, and taking feedback variable measurements to adjust parameters. Simulink can be converted into C quite easily (if I remember correctly).DaveNhttps://www.blogger.com/profile/15888112265418442290noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-83086585262443459802020-03-25T16:18:35.475-04:002020-03-25T16:18:35.475-04:00https://web.mit.edu/2.75/projects/DMD_2010_Al_Huss...https://web.mit.edu/2.75/projects/DMD_2010_Al_Husseini.pdfTangoWhiskeyhttps://www.blogger.com/profile/05148196941135450228noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-9495996177533346432020-03-24T01:32:00.444-04:002020-03-24T01:32:00.444-04:00Hi I just join https://app.jogl.io/project/121
Whi...Hi I just join https://app.jogl.io/project/121<br />Which channels are you in ? Slack use hashtag for channels ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-11475031627750555912020-03-23T04:32:26.815-04:002020-03-23T04:32:26.815-04:00I agree, upper and lower pressure values are very ...I agree, upper and lower pressure values are very important I think which can ultimately leads to the suitable pressure sensor.MavisteiNhttps://www.blogger.com/profile/12490183606328587502noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-54796005851225595752020-03-22T14:45:12.411-04:002020-03-22T14:45:12.411-04:00Thinking about the combination of Pi and Arduino t...Thinking about the combination of Pi and Arduino the one board that comes to mind is the BBB or even the BBE which has more memory, extra sensors, WiFi and Bluetooth. It would allow the GPIO control with analog inputs and can drive a touchscreen display.<br />We are willing to support this effort with boards. Get in contact with us https://www.sancloud.co.uk/contact-usSanCloudhttp://www.sancloud.co.uknoreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-73558032152397482822020-03-21T23:35:15.877-04:002020-03-21T23:35:15.877-04:00A final use for the air suspension componentes use...A final use for the air suspension componentes used in new and old Rangerovers. Mainly Dunlop parts. Something to look into. I have plenty of p38 parts to do itAlhttps://www.blogger.com/profile/11110694332260919994noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-88938477670380924142020-03-21T03:33:41.478-04:002020-03-21T03:33:41.478-04:00Centrifugal blowers generally are fine with being ...Centrifugal blowers generally are fine with being deadheaded, so you likely don't need the waste gate. If you felt some circulation was needed when the pressure control valve was closed you could have manual valve in place of the waste gate to allow a small continous recirculation.McGyverhttps://www.blogger.com/profile/15776256731108624893noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-29399527375616851022020-03-21T02:24:33.205-04:002020-03-21T02:24:33.205-04:00This is the same direction that I’ve been thinking...This is the same direction that I’ve been thinking. Positive pressure ventilation is decades old tech, so there can be no serious obstacles that couldn’t be overcome with arduino, 3D printer components, and commercial off the shelf parts. Mike Dhttps://www.blogger.com/profile/06918581346664853613noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-48374086721200705372020-03-20T18:21:34.199-04:002020-03-20T18:21:34.199-04:00It is not obvious to me that a cuirass ventilator ...It is not obvious to me that a cuirass ventilator would NOT work with COVID patients. It is about as simple a device as we could hope for. I will discuss with an MD friend who is a pulmonary specialist and report back tomorrow. Interestingly, they are currently in production and allegedly available. I just wonder if it has FDA approval. Check out this website and video: Hayekmedical.comWolverineEngineerhttps://www.blogger.com/profile/09012915184843197556noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-47253357201819218472020-03-20T12:50:34.794-04:002020-03-20T12:50:34.794-04:00*Limpia tus pulmones del Coronavirus*
Sí, el *vina...*Limpia tus pulmones del Coronavirus*<br />Sí, el *vinagre* 🍶es natural y no es tóxico; y al limpiar la lechuga con vinagre se desinfecta de bichos, además, si frotamos con un paño superficie donde hay *Coronavirus*🔅🧫 se logra desinfectar (lo dijeron en las noticias de Colombia y el mundo).<br />*Entonces… ¿con vinagre también se logra desinfectar nuestros pulmones?*<br />Como dice DaVinci 🧙🏼♂️✨ *"El Poder de lo Simple"* <br />Con un vaporizador o difusor, mezclar una taza de vinagre con una taza de Agua🥛. <br />Si no lo tienes, puedes poner a hervir una taza de agua en una olla, cuando hierva, le aplicas la taza de vinagre y aspiras por boca y nariz sus vapores (puedes repetir y volverla a calentar las veces que sean necesarias en el día♻️).<br />Instala el vaporizador o difusor en el baño de la casa o de la oficina💨, cuando regresemos a casa u oficina o cuando nos visite un amigo o un cliente, prendemos el dispositivo y aspiramos su vapor profundamente por las fosas nasales y también por la boca👃👄. <br />*¡La solución para mantener tus pulmones sin Coronavirus es simple!✨*<br />*El reto verdadero es cambiar el inconsciente colectivo del miedo y pánico*, para que volvamos a florecer la unión desde los pilares de la familia y trabajo en equipo🌤️.<br />¡Sé siempre positivo!🙏✨Andres ζalazar Θuinterohttps://www.blogger.com/profile/00433316336625929197noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-36372100272875749902020-03-19T20:06:52.654-04:002020-03-19T20:06:52.654-04:00Thanks, Yes That will work. Not useful for people ...Thanks, Yes That will work. Not useful for people with COVID symptoms but can be used for other people in the hospital that will be triaged and competing for remaining ventilators. This is what you mean. https://www.youtube.com/watch?v=pvrUQCMa3a8<br />I am talking to this guyDreamerhttps://www.blogger.com/profile/13701195188549081875noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-18455298531298490902020-03-19T20:01:59.170-04:002020-03-19T20:01:59.170-04:00I am working on developing the ventilators and oth...I am working on developing the ventilators and other designs at:<br />Helpful Engineering<br />You can access the discussion channels once you sign in at:<br />https://app.jogl.io/project/121<br />It is an ongoing effort to develop open-source designs for ventilators and other required equipment to save lives that could otherwise have been lost due to shortages of this equipment. Also to provide engineering support wherever it is required. We also welcome people with medical skills to advise us and also people with resources and skills in building or manufacturing devices within a very short time frame.<br />Dreamerhttps://www.blogger.com/profile/13701195188549081875noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-41966437244076622772020-03-19T20:00:25.333-04:002020-03-19T20:00:25.333-04:00I agree, Arduino is easier to program for control ...I agree, Arduino is easier to program for control functions and has less overhead. Simpler control design is probably more stable. The Raspberry could be used just for the control interface to an HDMI screen so that it could look very similar ro other commercial ventilator control screens and be easier to learn for medical personnel. Dreamerhttps://www.blogger.com/profile/13701195188549081875noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-4065474864474667422020-03-19T03:31:13.540-04:002020-03-19T03:31:13.540-04:00I also came here after reading about the people 3D...I also came here after reading about the people 3D printing the valves because when I read the parts list for the original Instructables project (which pointed me here) it seemed like the valves are the part that is most expensive and hardest to acquire... is that true, or am I misunderstanding something? Is there a spec that could be distributed to 3D printing hobbyists in order to diversify the supply chain? If the valve is a known component, and we theoretically need hundreds of thousands of them, shouldn't we just start making as many of as possible them ASAP even if the final kit design is still being tested? Or is it just a pipe dream to think that people can print ones that will work? <br /><br />Thanks for all the time and effort you have clearly put into this... sucks to be called back to the front lines after 11 years... I am heartened by the energy and just trying to figure out if there is any way I can help.Anonymoushttps://www.blogger.com/profile/04009688067368215170noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-59961871337499344452020-03-18T14:56:29.900-04:002020-03-18T14:56:29.900-04:00Arduino is a better choice for a controller than R...Arduino is a better choice for a controller than Raspberry Pi. The Arduino comes with analog/digital converter, and is cheaper. Raspberry Pi is kind of overkill for this.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-69027886616969221862020-03-18T12:09:19.325-04:002020-03-18T12:09:19.325-04:00In an emergency situation, wouldn't an Iron Lu...In an emergency situation, wouldn't an Iron Lung device be easier to build and operate ? Or maybe a wearable cuirass ventilator of sorts.Anonymoushttps://www.blogger.com/profile/03651334083003446156noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-21036542845492799492020-03-18T08:34:25.190-04:002020-03-18T08:34:25.190-04:00Thses guys are 3D printing valves in italy. I wish...Thses guys are 3D printing valves in italy. I wish I could be more helpful.<br /><br />https://www.theverge.com/2020/3/17/21184308/coronavirus-italy-medical-company-threatens-sue-3d-print-valves-treatmentsAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-21482432211167671102020-03-16T21:43:54.770-04:002020-03-16T21:43:54.770-04:00Hi, thank you- can you recommend how to connect wi...Hi, thank you- can you recommend how to connect with 3D printer operators? Mallin dot Andrew at g mailBig Birdhttps://www.blogger.com/profile/09141628677277527063noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-51786422088046174552020-03-16T15:28:23.133-04:002020-03-16T15:28:23.133-04:00Hello, I have done a project of a mechanical venti...Hello, I have done a project of a mechanical ventilation machine with low resources, I hope it would help someone, works like a aquarium coffer. Watch it https://youtu.be/X-5Uwbz5yO8Anonymoushttps://www.blogger.com/profile/16021841140324755212noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-78745875284124410642020-03-16T11:57:17.942-04:002020-03-16T11:57:17.942-04:00How about adapting / using a vacuum cleaner, is th...How about adapting / using a vacuum cleaner, is this possible? Also on the news I seem to remember an Italian emergency doc saying that most virus patients didn't need oxygen, just ventilation. Can anyone confirm?Davehttps://www.blogger.com/profile/03265222324746322871noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-54488247242072454282020-03-16T10:50:00.392-04:002020-03-16T10:50:00.392-04:00Many hoses to one rigid gang machine are indicwAte...Many hoses to one rigid gang machine are indicwAtedAnonymoushttps://www.blogger.com/profile/08515733912167798826noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-86798174547308881792020-03-16T03:03:08.533-04:002020-03-16T03:03:08.533-04:00If you figure this out, I'd love to know more....If you figure this out, I'd love to know more. I have a bipap that seems like it just needs to be hacked to do what a ventilator does, but I'm just guessing. Randyhttps://www.blogger.com/profile/02754876190956010034noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-69859217322251846852020-03-16T01:14:11.032-04:002020-03-16T01:14:11.032-04:00Anybody jumping into this should probably read thi...Anybody jumping into this should probably read this book about the subject: Medical Ventilator System Basics to get an understanding of the problems. https://www.docdroid.net/gval5gc/medical-ventilator-system-basics-a-clinical-guide-by-yuan-lei.pdf<br />GrahamWhttps://www.blogger.com/profile/15586537833564837043noreply@blogger.comtag:blogger.com,1999:blog-2217393939875576576.post-41346829550004919592020-03-15T22:45:30.414-04:002020-03-15T22:45:30.414-04:00Thinking of using a CPAP machine as a blower feedi...Thinking of using a CPAP machine as a blower feeding two zeolite-filled tubes alternately on a pressurize/exhaust cycle to oxygenate air. Would need valves and control mechanism. Patient would get either pressurized oxygenated air or just atmospheric pressure alternately as it cycles.Anonymoushttps://www.blogger.com/profile/11910244270504301741noreply@blogger.com