Navigation Links
Doctors develop life-saving, low-cost ventilators for emergency, rural and military use
Date:1/25/2010

A group of UK anaesthetists have designed and tested three prototype low-cost ventilators that could provide vital support during major healthcare emergencies involving large numbers of patients or casualties. The devices, detailed in a paper published online by Anaesthesia, could also be used where resources are limited, such as in developing countries, remote locations or by the military.

"Our research has demonstrated that it is possible to make a gas-efficient ventilator costing less than 200, for use where 2-4 bar oxygen is available, with no pressurised air or electrical requirements" says consultant anaesthetist Dr John Dingley from Morriston Hospital, Swansea.

"Such a device could be mass-produced for crises where there is an overwhelming demand for mechanical ventilation and a limited oxygen supply."

Problems with limited oxygen supply date back to the First World War when medical professionals had to deal with the large numbers of casualties affected by poison gas.

"The physiologist J S Haldane developed a delivery system that provided a high flow of oxygen from a modest fresh gas flow" says Dr Dingley, who is also a Reader in Anaesthetics at Swansea University.

"Modern equipment has become so sophisticated that we have, in some ways, lost sight of the basic principles that can be adopted in emergency healthcare situations.

"So our aim was to extend Haldane's concept of maximally efficient oxygen delivery to include pneumatic gas-powered ventilator designs.

"The initial design was envisaged as a ventilator for difficult environments, especially military scenarios, where large oxygen cylinders would be impractical, or in short supply, and electrical power would be unavailable.

"This led to two variants that are suited to emergency construction in bulk for mass deployment prior to a respiratory failure pandemic or other major healthcare situation."

All three designs operate on the principle that the energy is taken from approximately 1 l.min-1 compressed oxygen at a supply pressure of 2-4 bar to provide the motive force to ventilate the lungs.

"After the stored energy has been used to provide motive power in this way, the waste oxygen which is now at atmospheric pressure is then re-used to enrich the air being drawn into the ventilator before it is delivered to the lungs" explains Dr Dingley.

"In this way, most of the breathable oxygen is obtained from ambient air."

A mechanical test lung was used to test the three devices and this showed that they would provide effective ventilation for patients who were unable to breathe unaided. The devices were also tested over a range of lung volumes and compliances, which indicated that the oxygen consumption was considerably lower than that of the commercially available gas powered ventilators currently on the market.

This means that even if the devices had to be used over an extended period of time, they would use less than conventional units. They would also provide a viable and financially attractive alternative to buying extra critical care ventilators, which are expensive, complex microprocessor-driven devices.

"These devices could be used anywhere that 2-4 bar oxygen is available, such as a converted ward with no piped air or electricity" says Dr Dingley. "In extreme circumstances, they could even run on hospital compressed air, using very little air from the hospital's compressor reservoir.

"The concept, although unconventional, also allows an attending staff member to take over manual ventilation of the patient, with air if necessary, if a hospital's pneumatic mechanism or gas supply fails.

"The mechanism could possibly be made as a single-use device and stockpiled for crises where there is an overwhelming demand for mechanical ventilation, such as a pandemic."

Dr Dingley points out that major healthcare emergencies can call for creative solutions and that these can often be unorthodox.

For example during the 1952 Copenhagen polio epidemic, relays of medical students manually ventilated the lungs of patients with tracheostomies under the guidance of the anaesthetist. And in Beijing in 2003, trainees from unrelated specialties found themselves managing a sealed intensive therapy unit filled with avian flu victims, while receiving clinical guidance from overseas experts via a mobile phone.

"Health services are not designed to cope with the most extreme situations and fast, easy solutions can quite literally save lives" says Dr Dingley. "We feel that the low oxygen consumption pneumatic ventilators we have designed and tested could provide a low-cost, speedy solution in a crisis. They could also be used for a wide range of applications, such as rural healthcare and armed conflicts."


'/>"/>

Contact: Annette Whibley
wizard.media@virgin.net
Wiley-Blackwell
Source:Eurekalert

Related medicine news :

1. Greenfaith Ministry Calls on Churches & Doctors, to Address all Cannabis Issues and Regulation
2. Scientology Volunteer Ministers and Haitian-American Doctors and EMTs Heading to Disaster Zone
3. Dr. Constantine Frantzides Named One of Americas Top Doctors
4. New Cancer Information Available on MyBiopsy.org from the Doctors Who Diagnose Cancer
5. Studies Show Doctors Rapidly Forget Critical, Life-Saving Skills such as CPR and Life Support
6. Physicians Coalition Asks Federal Court to Block Obama Healthcare: Doctors Claim Bill Would End Practice of Medicine as We Have Known It, Assert Presidents Actions Are Unconstitutional
7. MessageBroadcast Launches Automated Medicare Survey System for NebDoctors of Nevada
8. Doctors Put Off End-of-Life Talks With Terminally Ill
9. New Study Says Doctors' Offices -- Not the DMV -- Should Be Where Americans Decide to Become Organ Donors
10. Marianjoy Medical Director of Pediatric Rehabilitation, Mary Keen, M.D., Named One of Chicagos Top Doctors
11. Doctors Urge Parents to Lower Volume Controls on Holiday Electronics
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... June 27, 2016 , ... ePAY ... partnership with Connance, a healthcare industry leader providing predictive analytics to optimize ... combine to provide health systems, hospitals and ambulatory surgical centers with dramatic ...
(Date:6/26/2016)... , ... June 26, 2016 , ... Pixel Film Studios ... X. , "Film editors can give their videos a whole new perspective by using ... - CEO of Pixel Film Studios. , ProSlice Levels contains over 30 Different ...
(Date:6/25/2016)... ... ... Austin residents seeking Mohs surgery services, can now turn to Dr. Jessica Scruggs ... for medical and surgical dermatology. , Dr. Dorsey brings specialization to include Mohs surgery, ... Micrographic Surgery completed by Dr. Dorsey was under the direction of Glenn Goldstein, MD, ...
(Date:6/25/2016)... ... June 25, 2016 , ... Dr. Calvin Johnson has ... he has implemented orthobiologic procedures as a method for treating his patients. The ... first doctors to perform the treatment. Orthobiologics are substances that orthopaedic surgeons use ...
(Date:6/24/2016)... Michigan (PRWEB) , ... June 24, 2016 , ... June ... about the dangers associated with chronic pain and the benefits of holistic treatments, ... individuals who are suffering with Sickle Cell Disease. , Sickle Cell Disease (SCD) is ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 2016  Consumers have taken a more active ... more emphasis on patient outcomes. ... the pharmaceutical industry have evolved beyond just providing ... are focusing on becoming more patient-oriented across their ... services that improve health. ...
(Date:6/24/2016)... 24, 2016 Research and ... "Structural Electronics 2015-2025: Applications, Technologies, Forecasts" report ... In-Mold Electronics, Smart Skin, Structural Health Monitoring, ... Structural electronics involves electronic and/or electrical components ... replacing dumb structures such as vehicle bodies or ...
(Date:6/24/2016)... , June 24, 2016 According ... by Type (Standard Pen Needles, Safety Pen Needles), Needle ... GLP-1, Growth Hormone), Mode of Purchase (Retail, Non-Retail) - ... This report studies the market for the forecast period ... reach USD 2.81 Billion by 2021 from USD 1.65 ...
Breaking Medicine Technology: