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Thornhill Medical is a leading developer of innovative mobile medical technologies. Thornhill Medical’s ground-breaking solutions are produced to be used around the world by emergency health care providers, military medical teams and disaster relief responders.


Renowned Canadian research scientist and physician, Dr. Joseph Fisher, has spent his career achieving ground-breaking advances in respiratory and oxygen-related science. Along with scientific colleagues, foundational engineers and others, he co-founded Thornhill Medical as a spin-off of Toronto’s prestigious University Health Network, to further develop and commercialize Canadian medical science.

Thornhill Medical’s work to develop and distribute its pioneering MOVES® SLC™ and MADM™ systems, among other exciting innovations, brings together home-grown scientific and engineering expertise, research and manufacturing. These innovations pave the way for future concepts that advance remote operability and can transform care in extreme or under resourced environments, for example rural and remote communities. The work also has direct applicability to conflict zones, disaster relief and developing nations with limited medical infrastructure.

At every stage, Thornhill Medical works with innovators in many spheres of expertise, from the world’s leading scientific researchers who advance new research in respiratory sciences and more, to other industry leading companies where collaboration pushes the boundaries of what’s possible. For example, Thornhill Medical and Linamar collaborated across traditional sectors to accelerate precision manufacturing capabilities while scaling up MOVES® SLC™ production during the COVID-19 pandemic.

An Introduction to MOVES® SLC™
With MOVES® SLC™, those at the front lines of extreme care are better equipped for the complexities of the casualty care operating environment, both today and in the future.

MOVES® SLC™ integrates multiple discrete devices — vital signs monitors, suction, oxygen generation and ventilation — into a single, rugged, compact, lightweight, energy- and resource-efficient, battery operated and portable device.

CEO Lesley Gouldie’s proven record of financial and strategic excellence has led Thornhill to unparalleled growth, achieving 1,500% validated three-year growth which has earned it a top 40 ranking among Canada’s Top Growing Companies in 2021.

The Thornhill R & D team — headquartered in Toronto’s premier incubation facility, MaRS Discovery District — is on the leading edge of precision control of arterial blood gases. Thornhill’s investigational tool, RespirAct®, stimulates blood flow responses in organs such as the brain and heart by precisely controlling arterial PCO2 and PO2. Monitoring the blood flow responses in conjunction with diagnostic imaging techniques such as MRI, reveals aspects related to a subject’s vascular health. The RespirAct® enables research at 50+ of the world’s leading research institutes towards
improving patient outcomes in areas such as cerebral vascular disease/stroke prevention, brain tumours and traumatic brain injuries.

Based in Toronto, Canada, Thornhill Medical’s innovations are now in 19+ countries around the world and growing every day. Thornhill Medical continues to lead the way in the highly competitive, fast-moving and precision-focused field of medical technologies, with a team committed to courage, collaboration and saving lives.

An Introduction to MADM™
Portable and adaptable, MADM™ can be easily connected to any ventilator device to safely and accurately enable gas anesthesia. The lightweight and compact design of MADM™ makes it ideal in more challenging environments, such as field hospitals and forward-deployed surgical operations. MADM™ is quick to set up, easy to use, and has a small footprint — exactly what is required when time and space are at a premium, and mobility is required.

Dr. Joseph A. Fisher, Co-Founder and Chief Scientific Officer

As co-founder of Thornhill Medical and a world-renowned research scientist in the field of anesthesiology and cardiovascular intensive care, Dr. Fisher brings a passion for innovative product development, grounded in his original scientific work described in more than 210 peer reviewed articles and over 40 patents, awarded and pending. His anesthesiology expertise at the University Health Network ensures that clinical relevance and excellence is always at the forefront of his work.

Lesley Gouldie, President and CEO

A seasoned professional with over 20 years of senior leadership experience spanning Fortune 500 to start-up companies, Ms. Gouldie brings a record of financial and strategic excellence in micro-electronics, biotechnology and content creation to helm Thornhill Medical.

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