SFU creates portable extreme environment

Feb 09, 2010

(PhysOrg.com) -- A Simon Fraser University lab's invention will make it easier for researchers to travel anywhere to study how extreme environments affect various populations, including the elderly, athletes and the sick.

In fact, SFU environmental physiologist Matthew White and his lab colleagues could eventually turn their portable breath-monitoring-and-manipulation device into a backpack for creating portable extreme environments.

Called an End-Tidal Forcing (ETF) system, the invention regulates the composition and availability of air gases a person inhales and exhales on a breath-by-breath basis.

The device mimics air conditions in extreme environments by delivering various levels of nitrogen, carbon dioxide and normal air into a volunteer’s lungs.

“Under normal conditions, we breathe in air that contains 20.9 per cent oxygen, 79 per cent nitrogen and only .03 per cent ,” explains White. “Our blood transports the mixture of gases that we inhale, including the vitally important oxygen, from our lungs to our body’s tissues.”

The ETF system can induce the experience of breathing on Mount Everest by having a volunteer inhale air in which the mixture of gases is lower in oxygen than normal.

The ETF system consists of a computer, a valve control system, a metabolic cart with gas and flow sensors, gas-filled bottles and respiratory tubing with a mouth-piece to deliver gases to the volunteer.

To test the physiological impact of extreme altitude/depth environments on humans, SFU researchers have relied on a pressure-controlled hypo/ in the Department of Biomedical Physiology and Kinesiology’s Environmental Physiology Unit (EPU).

“The EPU’s hypo/hyperbaric chamber remains critical to our research because of its exceptional capabilities,” says White. “But the flexibility of the ETF is akin to having a portable Mount Everest or ocean floor.”

White’s lab is also using the ETF system to study the physiological responses of the elderly in hot environments in the hopes of better understanding the impact of global warming on Canada’s aging population.

White plans to extend his research to studying people with lung and heart diseases in climate-change-related hot environments.

The European Journal of Applied Physiology is about to publish an article on a study that employs White’s ETF system, which is explained in a March 2009 article in the Respiratory Physiology & Neurobiology Journal.

Explore further: Longer needles recommended for epinephrine autoinjectors

Provided by Simon Fraser University

not rated yet
add to favorites email to friend print save as pdf

Related Stories

Cockroaches Control Their Breathing to Save Water

Sep 24, 2009

(PhysOrg.com) -- Many insects have been known for decades to hold their breath when resting, but the reasons have not been well understood. A new study on cockroaches suggests the insects reduce their breathing ...

Viagra studied for multiple uses

Jun 23, 2006

California researchers have discovered entirely new applications for Viagra, the first erectile dysfunction drug to win federal approval.

Battlefield and terrorist explosions pose new health risks

Mar 27, 2007

High concentrations of nitrogen dioxide gas — inhaled for even very brief periods following fires, explosions of military munitions or detonations of terrorist devices — could cause serious lung damage, scientists reported ...

Recommended for you

Mystery of the reverse-wired eyeball solved

5 hours ago

From a practical standpoint, the wiring of the human eye - a product of our evolutionary baggage - doesn't make a lot of sense. In vertebrates, photoreceptors are located behind the neurons in the back of the eye - resulting ...

Neurons controlling appetite made from skin cells

5 hours ago

Researchers have for the first time successfully converted adult human skin cells into neurons of the type that regulate appetite, providing a patient-specific model for studying the neurophysiology of weight ...

Quality control for adult stem cell treatment

7 hours ago

A team of European researchers has devised a strategy to ensure that adult epidermal stem cells are safe before they are used as treatments for patients. The approach involves a clonal strategy where stem cells are collected ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.