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This profile was last updated on 3/29/15  and contains information from public web pages and contributions from the ZoomInfo community.

Dr. Joseph A. Fisher MD

Wrong Dr. Joseph A. Fisher MD?

Chief Scientist and Director

Thornhill Research Inc
210 Dundas W
Toronto , Ontario M5G 2E8

Company Description: Thornhill Research is a medical device innovator that develops products in the fields of cardiovascular diagnostics, neuroimaging, EMS / Field Medicine, and drug...   more

Employment History


  • MD
49 Total References
Web References
Thornhill Research Inc., 29 Mar 2015 [cached]
Joseph A. Fisher, MD, FRCP(C) Chief Scientist / Director
Dr. Fisher is a co-founder of Thornhill Research and Professor in the faculty of Medicine at the University of Toronto. He is currently a Staff Anaesthetist at the University Health Network and Senior Scientist, Human Physiology & Clinical Investigation, at Toronto General Research Institute. He has published over 120 papers in peer-reviewed journals, and designed and consulted on products for NASA, Government of Canada, United States Marine Corps, and various companies. He is an inventor on over 25 issued and pending patents, including the core technology behind Thornhill's technologies. Click here to search Pubmed for Dr. Fisher's research or here for Dr. Fisher's page.
Reducing flow through the neck veins ..., 8 Nov 2011 [cached]
Reducing flow through the neck veins that drain blood from the head tops up the fluids that surround the brain, allowing for more cushioning, according to Joseph Fisher, a University of Toronto anesthesiologist and one of the study's authors.
He compares a helmet to the sheet metal that encases a car: Upon impact, it can't stop the contents of the vehicle from jostling around.
"Helmets basically prevent trauma to the skull, but don't protect impact to the brain," he said. The fluid around the brain does that. It can act like a seatbelt, or an airbag, but it needs to be topped up in order to be most effective.
Most of the time it's not topped up, and there's a little extra space that allows the brain to slosh around. But Dr. Fisher and his colleagues determined the amount of pressure - about the equivalent of a shirt collar half-an-inch too small - it takes to stop the sloshing.
They conducted trials in rats, and compared the damage to the brains of rodents in collars to those without after a controlled injury. "There was a dramatic reduction, one that's never been seen before to my knowledge, in the markers of brain injury," Dr. Fisher said. If they work, the collars could prove an affordable and effective tool for brain-injury prevention. Dr. Fisher and his colleagues hope to begin human trials as soon as possible.
Researchers Develop New Potential Solution to Concussions, 8 April 2012 [cached]
David Smith, Joseph Fisher and Bailes came up with to describe the movement and tearing of the brain that occurs when an athlete sustains a hit and suffers from a concussion.
Fisher, a senior scientist at the Toronto General Research Institute, also collaborated on the study.
Thornhill Research Inc., 29 Mar 2015 [cached]
Dr. Joseph Fisher Research Tel: +1 (416) 597-1325 x222
Joseph A. Fisher MD, FRCP ..., 6 Sept 2006 [cached]
Joseph A. Fisher MD, FRCP (C) is the Principle Investigator for the Isocapnia Research Laboratory, a Toronto General Hospital staff Anesthetist, a University Health Network Professor at the Faculty of Medicine - University of Toronto (Toronto, Canada) and the Chief Scientific Officer at Thornhill Research. Dr. Fisher's remarkable achievements and credentials are furthermore complimented by the receipt of his recent Inventor of the Year 2005 award presented by the University Health Network.
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