Talk:Ventilator

message: The inflation pressure can be varied by sliding the moveable weight on top of the bellows, it can be seen in the photograph.
And where is the photograph? Seems to me like some badly copy & paste.
--81.21.45.44 16:23, 24 May 2006 (UTC)
replies: text: Actually, if you look at the history/diffs, you can see he tried to link to a photograph, it apparently just wasn't uploaded. That said, the section does need some cleanup. VoxLuna 10:17, 26 June 2006 (UTC)
thread_title: Ventilators, historical

message: The person in the picture labeled "An ER patient on a ventilator" on this page appears to be wearing a face mask; she is not on a ventilator. Chrisalta 07:08, 22 April 2007 (UTC)
replies: text: You are correct, and User:Rcej rightly commented out the picture as seen in this diff. There's nothing wrong with using the image on other pages though, such as oxygen therapy (as an alternative to nasal cannula). --Kyoko 00:51, 23 April 2007 (UTC)
thread_title:  mechanical ventilator 

message: I have had a fair amount of experience with HFPV.  Prior to my edit, there was no information about it.  Some may think that it is worthy of a separate article, but I have no such lofty goals for now.VK35 20:29, 8 June 2007 (UTC)
thread_title: HFPV

message: The initial statement refers to ventilators as moving "non-medical gas."
Oxygen IS a medical gas. Yes, I KNOW they are refering to anesthesia, but oxygen is oxygen.  —Preceding unsigned comment added by 68.229.10.49 (talk) 04:45, 7 October 2007 (UTC)
thread_title: Comments

message: A lot of people only think about ventilators when they're trying to write a living will.  The history is lovely, but can we get some simple information that would be useful to a basically healthy person who's trying to figure out if they'd ever want a machine to make them breathe? WhatamIdoing (talk) 01:19, 17 December 2007 (UTC)
thread_title: Expansion request

message: Positive-pressure_airway_ventilator, please add this as a redirect.~ender 2008-05-29 18:09:PM MST
— Preceding unsigned comment added by 4.240.27.73 (talk • contribs) 01:10, 30 May 2008 (UTC)
thread_title: Add a redirect

message: I don't think that when you try to get to ventilator it should redirect here. this is a subterm of the term and so it should go directly to ventilator and have redirects to here from there. the term ventilator covers all the subtopics such as this under its non specific heading unlike this article.   —Preceding unsigned comment added by Itsandbits1 (talk • contribs) 07:08, 16 August 2010 (UTC)
thread_title: Comment

message: Is it coincidence that all of the products mentioned are from the same brand and are not even the most inovative ones?
13.1.2012 10.42AM Leo  — Preceding unsigned comment added by 63.150.138.5 (talk) 01:42, 13 January 2012 (UTC)
thread_title: note

message: The word "ventilator" is also used in non-medical context to devices and other means of doing any of the things listed on the Ventilation disambiguation page.  But currently Ventilator redirects to this article with no link to the general Ventilation disambiguation page.
77.215.46.17 (talk) 00:39, 18 August 2012 (UTC)
replies: text: Okay, I've put in the dab template. The problem is that there's no ventilator dab page, but only a ventilation dab page. There are some places there where there is ventilation without a ventilator (as in some buildings). Sometimes a non medical machine that ventilates is called something else. But I agree that one should go look for non-medical ventilators in the articles on the ventilation dab. SBHarris 03:02, 18 August 2012 (UTC)
thread_title:  "Ventilator" is not always a medical word 

message: The Puritan Bennett MA-1 was introduced in 1967 and was the first ventilator that was  volume delivered, pressure limited.  There is no mention of Puritan Bennett at all in this article and they gave us the foundation for the ventilators we know today.  
Also, Bird produced several types of mechanical ventilators including the Mark-7, Mark-8, Mark 10, Mark 14, and the 'Baby Bird', the first infant ventilator.  This company also was the first to produce a 'pneumovest' that vibrated for clearing of secretions and the first curiass that was completely driven by pneumatic and not electrical power.  — Preceding unsigned comment added by 208.190.38.199 (talk) 01:39, 10 December 2013 (UTC)
thread_title:  Puritan Bennett ventilators 

message: Bourns produced ventilators that spanned the range from the LS104-150 (which was the gold standard for ventilating very low birth weight children) through the BP200 and the Bear-1. 
Engström had a range of volume ventilators that were also capable of being used in the Operating Theater.
Emerson had a very interesting ventilator that included a pressure cooker as its humidifier. John Emerson was also credited for creating the original "Iron Lung."
The RPR was one of the French contributions to the art and was fairly versatile.
Automatic Ventilation of the Lungs Mushin et al () describes quite a few devices in detail.
Docdave (talk) 01:22, 22 July 2015 (UTC)
thread_title:  Other Significant Ventilators 

message: The comment "Ventilators used under increased pressure (hyperbaric) require special precautions and few ventilators can operate under these conditions" going on to cite a specific device capable of such use is strange. In the early 1970s, I routinely ventilated patients at up to 5 atmospheres with the relatively primitive Bird Mk7 and I know that Vickers had a small hyperbaric chamber that came with a fluidic "respirator" the name of which escapes me.
Docdave (talk) 01:31, 22 July 2015 (UTC)
thread_title:  Ventilators in hyperbaric environments 

message: Here are a couple of WP:RS which describe the ventilator industry in the context of increasing production to meet the upcoming needs of the coronavirus epidemic. 
https://www.bbc.com/news/business-51914490
Coronavirus: Plan to ramp up ventilator production 'unrealistic'
By Simon Gompertz & Esyllt Carr 
BBC News
16 March 2020
https://www.forbes.com/sites/baldwin/2020/03/14/ventilator-maker-we-can-ramp-up-production-five-fold/#79e0ff9a5e9a
Ventilator Maker: We Can Ramp Up Production Five-Fold
William Baldwin
Forbes
Mar 14, 2020
--Nbauman (talk) 15:22, 17 March 2020 (UTC)
thread_title:  Ventilator industry 

message: I feel its good to put this here:
;Projects
There are several projects rushing to meet the demand for ventilators:
*single ventilator for multiple simulated patients to meet disaster surge.
https://www.ncbi.nlm.nih.gov/m/pubmed/16885402/
Criticisms of this: that it hasn’t been tested in real patients and that patients’ lung compliances change during Advanced Respiratory Distress syndrome so it’s hard to match 4 patients who have similar lung compliances.
*The Project Open Air
https://www.projectopenair.org/
“working on medical devices, such as open-source ventilators, to have a fast and easy solution that can be reproduced and assembled locally worldwide.”
*The Pandemic Ventilator Project
https://panvent.blogspot.com
This blog documents our attempt to construct a ventilator design for use in a Flu Pandemic that can be made from readily available materials at the last minute. Hopefully, the situation never arrives where this device will need to be used for a pandemic. But just in case... The Post below is the most recent. See the right-side panel for other posts. This Blog was started on Feb 22, 2007
*The zFrugal Ventilator
Frugal/Jugaad innovation: 10 minutes to make a $1.25 shampoo bottle DIY ventilator, with a 2-year lancet-published randomized control trial finding that it improves outcomes in infants, especially when coupled with oxygen. No evidence on use with adults
🔗https://www.bbc.co.uk/news/business-40498395
🔗http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(15)60249-5/fulltext
*Bubble CPAP (continuous positive airway pressure) demo vids here and here.
Open-source project for ventilators and oxygen concentrators
Project page  DELETE ME  IS THIS RELATED TO THIS DOCUMENT?  DELETE ME
Join the slack channel  This slack channel has moved link needs updating  DELETE ME
Introduce yourself  THIS LINK IS BROKEN - DELETE ME
Google drive with documents here  DELETE ME
Repeating daily at 1 pm UTC. Join us on this zoom call if you can. (Time zones)  DELETE ME
Project Includes:
DIY Oxygen Concentrator
O2 Concentrator Pzroject
Trying to generate a set of instructions that allow for people with only mild DIY skills to build an oxygen concentrator.
*DIY Ventilator
https://docs.google.com/document/d/1RDihfZIOEYs60kPEIVDe7gmsxdYgUosF9sr45mgFxY8/edit#
List of projects - but warning from https://panvent.blogspot.com/2020/02/im-back.html saying "Be very cautious with the article from Mechanical Engineering Group at MIT"
Do we need more ventilators? - Yes.
*The Pandemic Ventilator : 6 Steps (with Pictures)
The EndCoronavirus.org Ventilator
https://medium.com/@brucefenton/we-need-ventilators-we-need-you-to-help-build-them-30805e5ee2ea
The ventilators subgroup of EndCoronavirus.org (@endcovid19), an effort by The New England Complex Systems Institute, staffed with scientists from Harvard and MIT and others who have an understanding of pandemics, medicine, systems, risk and the key numbers and data behind this threat.
:I've added info about the New England Complex Systems Institute (NECSI) / endcoronavirus.org project to the article, expanding on Victor Grigas's suggestion for listing this. In the interest of speed, I have not previously discussed my additions on the talk page, but others can make improvements as needed. Omygoshogolly (talk) 22:47, 27 March 2020 (UTC)
replies: text: There's a separate article on open-source ventilator -- 65.94.170.207 (talk) 19:06, 30 March 2020 (UTC)
thread_title:  open source  

message: I'd like to request wikipedia editors to host a status/features comparison for all open source ventilators initiatives. As you may have heard a lot of engineers are trying to come with a simple and working solution for the ventilators supply problem for COVID-19. There is a lot of redundant effort and designers reinventing stuff ("not invented here syndrome"). It would be very important that people that want to contribute may find an general overview of all these projects, so one may decide where to join or which project is worth trying to print/manufacture. I think wikipedia is the ideal place for hosting this comparison given it's importance, visibility and easiness of updating as these projects (hopefully) evolve.
Ventilator design                	Site                                                                                                       	Status                                                                                                                                        	Concept                                                                                                                                                                           	Schematics/drawings available                                                                             	Mandatory ventilation mode	Breathing support mode                                                         	Max pressure limit                                 	PEEP                                                   	Inspiratory:Expiratory ratio (I:E)                	Respiratory Rate                         	Tidal Volume (Vt)                                                                                            	FiO2 range                                                    	Display (info?)              	Cylinder O2 / Wall (regulator?)                  	Compressed air required?	Power supply        	Battery                   	Connectors	Cleaning/Infection control	HMEF filter    	Alarms
CITI-OpenLung                    	https://github.com/emersonmoretto/CITI-OpenLung                                                            	In development                                                                                                                                	Sliding piston compresses ambu-bag. step motor. arduino based.                                                                                                                    	Only some preliminary mechanical drawings for ambu-bag mechanism.                                         	                          	                                                                               	                                                   	                                                       	                                                  	                                         	                                                                                                             	                                                              	                             	                                                 	                        	                    	                          	          	                          	               	
MIT 2010 (Husseini et al)        	https://web.mit.edu/2.75/projects/DMD_2010_Al_Husseini.pdf                                                 	Prototyped (2nd version). MIT says "did not move past the prototype stage".                                                                   	Rotating cam compresses AMBU bag, angle sensed, DC gear motor, H-bridge for reversal, Arduino.                                                                                    	Github page is dead. Backup here: https://drive.google.com/drive/folders/1DJboju0iwRJ_DEyZjsaUarbmyRdGogQ8	yes                       	yes (Assist Control mode). negatice pressure trigger back to tidal volume mode.	Overpressure triggers alarm                        	not included                                           	Not implemented but possible.                     	5-30 bpm                                 	200-750 mL                                                                                                   	No O2 mix                                                     	LCD planned (future version?)	?                                                	Not required            	Wall outlet PS      	yes                       	?         	?                         	Not included   	Overpressure only. Other alarms planned.
MIT E-Vent                       	https://e-vent.mit.edu/                                                                                    	There is a working prototype (3rd version) but doesn't seem to be using the final components they claim.                                      	Ambu-bag is compressed by rotating arms actuated by a single geared DC motor with encoder. Plan is to use Arduino, but prototype pictures show National Instruments board instead.	Apparently not.                                                                                           	yes (volume mode)         	yes (assist control mode)                                                      	Yes. Also uses pressure to fallback to volume mode.	Assumed to be included with the Ambu bag.              	Yes                                               	0-24 bpm                                 	Pot adjustable in terms of arm's movement range. bag size is unknown so it doesn't know about mL equivalency.	No O2 mix                                                     	LCD for pressure displaying  	No                                               	Not required            	ATX power supply    	Yes (optional)            	?         	?                         	?              	Yes (overpressure, motor problem, pressure not increasing). More to be added.
Open Source Ventilator Ireland   	https://opensourceventilator.ie/                                                                           	Still getting organized. Good technical discussion here: https://docs.google.com/document/d/1RDihfZIOEYs60kPEIVDe7gmsxdYgUosF9sr45mgFxY8/edit#	Bag Valve Mask (BVM) Ventilator, DC motor, H-Bridge                                                                                                                               	No                                                                                                        	                          	                                                                               	                                                   	                                                       	                                                  	                                         	                                                                                                             	                                                              	                             	                                                 	                        	                    	                          	          	                          	               	
OpenLung BVM Ventilator          	https://gitlab.com/open-source-ventilator/OpenLung                                                         	Mechanical concept being reviewed.                                                                                                            	                                                                                                                                                                                  	                                                                                                          	                          	                                                                               	                                                   	                                                       	                                                  	                                         	                                                                                                             	                                                              	                             	                                                 	                        	                    	                          	          	                          	               	
OpenVentilator                   	https://github.com/popsolutions/openventilator                                                             	Unknown (any working prototype?)                                                                                                              	Compress a bellows made with a tire chamber (or ambu, optionally). Arduino based. DC or step motor?                                                                               	Files available at github. Not finished though (?)                                                        	yes                       	?                                                                              	seems planned                                      	?                                                      	May be implemented in software                    	3-30 (software)                          	?                                                                                                            	?                                                             	Yes (?)                      	?                                                	Not required            	                    	                          	?         	                          	Being discussed	May be implemented in software
OxyGEN                           	https://www.oxygen.protofy.xyz/                                                                            	Working (5th version), start to test with 4 hospitals in Barcelona                                                                            	Rotating cam compresses AMBU bag. DC windshield motor. No motor reversal. No microcontroler.                                                                                      	yes                                                                                                       	yes                       	no                                                                             	no                                                 	not included                                           	Changeable by replacing cam with a different shape	Manual/analog adjustable (dimmer)        	Probably fixed. (May be cam-changed?                                                                         	No O2 mix                                                     	No                           	No                                               	Not required            	12V ATX power supply	Not included (easy to add)	?         	?                         	Not included   	No
Pandemic Ventilator Project      	https://docs.google.com/document/d/1Dz7eMgXowFBtBA_0PKzfAXweHnNMbGlIAXPshCbI2Vk/edit#heading=h.r1wktxbs8nwb	Supposedly three prototypes have being built but software development has yet to start.                                                       	Uses centrifugal blower (possibly repurpose a vacuum cleaner) and quick acting valves to regulate pressure. Arduino controls rate and PEEP.                                       	No                                                                                                        	                          	                                                                               	                                                   	Set by Arduino or by water depth (alternative concept).	                                                  	                                         	                                                                                                             	                                                              	                             	                                                 	                        	                    	                          	          	                          	               	
Project Open Air                 	https://www.projectopenair.org/                                                                            	Seems like a collection of other initiatives                                                                                                  	                                                                                                                                                                                  	                                                                                                          	                          	                                                                               	                                                   	                                                       	                                                  	                                         	                                                                                                             	                                                              	                             	                                                 	                        	                    	                          	          	                          	               	
Projeto Respirador Hacker        	https://docs.google.com/document/d/1x7G5CbkijJWCOzE0SckrtT1vbTyRyPlI0n-fVixpFnw/edit#                      	Initial discussions on existing ideas and requirements                                                                                        	Unknown                                                                                                                                                                           	                                                                                                          	                          	                                                                               	                                                   	                                                       	                                                  	                                         	                                                                                                             	                                                              	                             	                                                 	                        	                    	                          	          	                          	               	
Projeto Ventilador Pulmonar UFRJ 	https://drive.google.com/drive/folders/12JQGZV7p5xM-7cdM3cZFkQG02_cHs7PZ                                   	Prototype tested with lung simulator devices. Reportedly waiting for authorization for human trials.                                          	Uses a CPAP Boussignac (device generating Continuous Positive Airway Pressure + air/oxygen mixing), mechanical PEEP, valve actuated by microcontroler to set I:E ratio.           	No (?)                                                                                                    	Yes                       	No (?)                                                                         	Yes (manually adjusted on inlet valves)            	Yes (spring load type)                                 	Yes, set by microcontroler.                       	Yes.                                     	Depends on choosen pressure range and mechanical characteristics of the breathing system.                    	Yes (manually adjusted on inlet valves - but not yet measured)	No                           	Both cylinder/wall supported (regulator included)	Yes.                    	?                   	Not implemented.          	?         	?                         	Yes.           	No.
Reespirator by Coronavirus Makers	https://www.coronavirusmakers.org/index.php/es/                                                            	Mechanical design preliminary. Software and electronics already in the works and available.                                                   	Bag-compressing concept using step motor actuating on a lever. Software and electronics already in the works using Arduino Mega, Step motor, LCD, encoder for rotation.           	Partialy (software and PCBs available but no mechanical drawings)                                         	                          	                                                                               	                                                   	                                                       	                                                  	                                         	                                                                                                             	                                                              	Yes                          	                                                 	                        	                    	                          	          	                          	               	
Rice Design                      	https://docs.google.com/document/d/1-DRXnVkJOlDCmvTzh-DgWDxeLSrZTiBYyH0ypzv8tNA/edit                       	Prototype was built. Servo motor failed after 11h. CO2 acumulation.                                                                           	Linear moving arms (rack and pinion) compressing Ambu-bag. Servo Motor. PICAXE 20x2 microcontroller.                                                                              	Rice did not allow sharing files (?)                                                                      	yes                       	No                                                                             	No pressure sensor (?)                             	Not included                                           	Not implemented but possible.                     	3 predefined settings: slow, medium, fast	3 predefined settings: adult, child, infant (changes the movement range)                                     	No O2 mix                                                     	No (only LED indicators)     	No                                               	Not required            	External power suppy	Not implemented           	?         	?                         	No             	No
Ventilaid                        	https://www.ventilaid.org/                                                                                 	Prototype version 1 completed.                                                                                                                	Cylindrical bellows produced in 3d printer driven by industrial pneumatic actuator. Version 2 will remove compressed air/actuator requirement.                                    	Yes, mechanical drawings and STL files. Not much information on microcontroler/firmware (if any)          	yes                       	No                                                                             	                                                   	                                                       	                                                  	                                         	                                                                                                             	                                                              	                             	                                                 	Yes.                    	                    	                          	          	                          	               	No
The table is available in Google docs (also includes another important table with minimum requirements for low cost ventilators according different sources, specially for COVID-19). Please check the following link for both tables (colors make them more easily visualized): 
187.99.254.27 (talk) 01:56, 26 March 2020 (UTC)
replies: text: There's a separate article on open-source ventilator, perhaps you should post this request there? -- 65.94.170.207 (talk) 19:07, 30 March 2020 (UTC)
thread_title: Comparison of open source projects

message: Given the severity of the COVID-19 and other bacteria and viruses, and the need for better, more thorough, understanding of these devices, it would be good to label the different parts and controls and buttons on the picture provided of the Bird ventilator (or another), with links to articles about what those functions and buttons and values mean and their relationship to the device and to respiration and circulation, in the context of ventilation.  — Preceding unsigned comment added by 76.16.47.132 (talk) 21:45, 29 March 2020 (UTC)
thread_title: Labeled picture

message: I propose to merge Ventilator into Mechanical ventilation. I think that the content in the Ventilator article can easily be explained in the context of Mechanical ventilation, and the latter article is of a reasonable size that the merging of Ventilator will not cause any problems as far as article size is concerned. 
Moreover, it will focus our limited editorial attentions on getting one, rather than two, articles up to readable, WP:VERIFY-compliant quality. At present, the two are a travesty for the encyclopedia. 2601:246:C700:19D:7197:10A0:DD58:78FD (talk) 22:00, 1 April 2020 (UTC)
replies: text: ~ Penlite (talk) 13:10, 18 April 2020 (UTC)
thread_title:  Merger proposal (2020) 

message: Note: a vandal removed my warning about Homemade Ventilators. Sorry about that. 
The vandal has been reported. 
People can be injured by the manual "bagging" method - not uncommon - that's the 
central device proposed in most of these efforts. 
Ventilators monitor breathing, oxygen intake and carbon dioxide output, and adjusting automatically.  
The control software is pretty complicated - based on use-cases in emergency care. 
To understand abit more about these devices, read the Kindle book 
"The Ventilator Book" by Dr. Owens. These appear to be complicated. 
Please take care with this. There is homework left to do. — Preceding unsigned comment added by Jackie42.chan (talk • contribs)  on 23 March
: I have moved your comment to the talk page. Do you have a WP:reliable source for this information ? It cannot be added if you dont have one.  Cedix (talk) 16:13, 6 April 2020 (UTC)
replies: text: We do have a separate article on Open-source ventilator, if the information deals with these devices only, it should go to that article. Also, home-made and open-source are not synonymous, so perhaps and additional "home made ventilator" article needs to be made? An open source design could easily be virtually identical to a professional medical grade one  -- 65.94.170.207 (talk) 15:28, 7 April 2020 (UTC)
replies: text: User:Cedix, let's turn it around. If we required WP:MEDRS reliable sources for the Open-source ventilators section, most of it would be gone. Vice and NPR aren't good sources for reliable evaluations of life-critical medical devices. I've seen a lot of stories in popular sources, including the New York Times, that reported enthusiastically about devices that don't even have a working prototype, and haven't ever been used in real patients or subjects. In the absence of WP:MEDRS, I would be willing to use other reliable sources, with an emphasis on including critical viewpoints, according to WP:WEIGHT. --Nbauman (talk) 20:54, 21 April 2020 (UTC)
replies: text: Nbauman, to be clear I am not against Jackie, neither am I challenging him. I think he raised an important point, that must be mentioned somewhere, that is why I started this discussion. Please take a look at these reports. and then https://www.ft.com/content/5f393d77-8e5b-4a85-b647-416efbc575ec . I will be very thankful if you can include the useful information at the appropriate locations. Cedix (talk) 17:07, 22 April 2020 (UTC)
thread_title: A Biomedical Engineer's Technical Assessment: Open Source Ventilator 

message: First, I will self-disclose that I worked for Medtronic but am retired >9 years. I did not work in the cardiopulmonary division but had some involvement with them perhaps 20 yrs. ago, nothing to do with this.
This section of the article references solely the NY Times article and does not discuss information that surfaced after it was published. In particular, it does not discuss Medtronic's response to the article. http://newsroom.medtronic.com/news-releases/news-release-details/medtronic-statement-regarding-new-york-times-article-march-29https://www.massdevice.com/medtronic-responds-to-ny-times-story-about-failed-ventilator-contract/
The contract discussed was during the time frame 2010-13 and was between BARDA and Newport Medical. In 2013, Covidien bought Newport Medical. Medtronic bought Covidien in 2015. 
There are some portions of the Medtronic response that might be questioned or difficult to verify (e.g., "Covidien management attempted through 2013 to address and fill the gaps in Newport’s capabilities, however, they were unable to do so."). However, there are other parts that appear solidly factual enough to be incorporated, specifically:
 • Covidien/Newport was unable to deliver a product that met the target cost of manufacture required by the contract.
 • Covidien/Newport was unable to secure FDA approval for pediatric usage which was also a contract requirement.
 • In November 2013, BARDA and Covidien/Newport mutually agreed to terminate the project.
 • On termination, BARDA retained ownership of all equipment, tooling and intellectual property rights in the project. 
Jeisenberg (talk) 16:17, 18 April 2020 (UTC)
thread_title: BARDA/Newport Ventilator Development Project

message: by Stanford University. lower-cost ventilator for emergency stockpiles and the developing world, looks similar to a modern ICU ventilator. Project started around 2010 and is expected to ship its first product in 2020.     Setenzatsu.2 (talk) 18:47, 25 June 2020 (UTC)
thread_title:  OneBreath 

message: modification of one ventilator to ventilate two or four patients simultaneously How to Use One Ventilator to Save Multiple Lives study it was based on from 2006/2007 by Neyman & Irvin 
:A response from an Italian doctor to the method: “This is unfortunately not as good of an idea as it seems. In trauma and shootings, it’s one thing because lung compliance is unlikely to change quickly. However, in ARDS (and COVID19), we expect to have dramatic changes in lung compliance. When one patients lung compliance changes, there is a significant risk of underventilating the patient with lowest compliance and overventilating patients with highest compliance – both potentially deadly. I worry that instead of saving one person, you create a situation where you increase the odds of losing both (or all 4) patients“. This (maybe) can be fixed with flow restrictors.
for ventilation of patients with different pressures using a flow restrictor: 3D printed circuit splitter and flow restriction devices for multiple patient lung ventilation using one anaesthesia workstation or ventilator, 2020 
Use of a Single Ventilator to Support 4 Patients: Laboratory Evaluation of a Limited Concept; review of study by Neyman & Irvin
cross-contamination?  Each patient with their own circuit or patients sharing one circuit? Pressure control ventilation, not volume control ventilation. 185.18.60.122 (talk) 18:59, 26 June 2020 (UTC)
replies: text: VESper™ is a unique ventilator expansion device that allows a single ventilator to support up to four patients under emergency use authorization by the FDA during times of acute equipment shortages [VESper™ is a unique ventilator expansion device that allows a single ventilator to support up to four patients under emergency use authorization by the FDA during times of acute equipment shortages]185.18.60.122 (talk) 19:19, 26 June 2020 (UTC)
thread_title:  "one for more" 

message: Developed in 2007 by  John Strupat for the U.S. Department of Homeland Security. The agency was looking for a life support device that could run on batteries and be deployed cheaply and effectively in a potential mass casualty situation. The proposal never worked out and it was never produced. for one unit, his design would cost about $500 a unit. He says it's a freebie if anyone is interested in mass producing it.  185.18.60.122 (talk) 19:08, 26 June 2020 (UTC)
thread_title:  $500 ventilator 

message: The photo is captioned as the East Radcliffe Ventillator, but is is in fact an anaesthetic machine in UK medical terminology.  The ventillator is the cube in the middle of the machine. Is that not the case in US English as well? Pedalcat (talk) 15:15, 25 August 2020 (UTC)
thread_title:  The photo of the East-Radcliffe 

message: Greetings and hoping all is well. The claim about the origin of ventilator is not absurd. It is not my own self-published work. It was sourced and not just any source but a reliable one. The ventilator then was not advanced as today's. Do not have it in mind that the Ancient Egyptian ventilator is exactly the same as the modern. Maybe if it had been the likes of Greece, Rome or middle ages, the post will still be around, not deleted as well. Lol, I haven't poked my finger at anyone; just a joke. Sorry for the troubles tho. Kwesi Yema (talk) 14:22, 23 September 2020 (UTC)
replies: text: This article is about the medical device, the source you were adding was about ventilation shafts in buildings. The article on those is located at Windcatcher - MrOllie (talk) 14:42, 23 September 2020 (UTC)
thread_title:  Egyptian invention of a proto ventilator