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About Thorasys

THORASYS Thoracic Medical Systems Inc. is a young respiratory medical device company based in Montreal, Quebec, Canada. We apply cutting edge research and technology to the development of products for the diagnosis and monitoring of lung diseases such as Asthma and COPD using the Forced Oscillation Technique (FOT).

Our tremoFlo™ C-100 Airwave Oscillometry System (AOS) ™ is a compact, portable medical device that permits effortless assessment of lung function in a wide range of patients, including young children and elderly patients.

  • What we do

    We focus on developing novel technologies for measuring lung function without patient effort. Current techniques require substantial effort and coordination, which is difficult or even impossible for many patients.

  • What we want to achieve

    We believe that obtaining better measurements of lung function in more patients (i) improves patient care, (ii) prevents exacerbations, and (iii) reduces healthcare expenditures. We think that’s important.

  • What makes us unique

    We like what we produce, but what ultimately makes us unique is our stellar team and our shared passion for finding better solutions for healthcare professionals and their patients. We want to make a difference!

tremoFlo C-100

Airwave Oscillometry System (AOS™)

  • Introducing Airwave Oscillometry

    Airwave Oscillometry™ is a novel method for measuring lung function without patient effort and the most advanced form of the Forced Oscillation Technique (FOT). The tremoFlo™ C-100, the world’s first Airwave Oscillometry System (AOS™), accurately measures lung function by superimposing a gentle multi-frequency airwave onto the patient’s respiratory airflow. Throughout the AOS measurement, the patient just breathes normally.

  • Lung Function Testing Where Spirometry Doesn’t Go

    Although Spirometry is one of the most widely used tests to diagnose lung disease, its limitations are well-known: Spirometry outcomes such as FEV1 and FVC are dependent on patient cooperation, often difficult to obtain in young children and the elderly, challenging in patients with a strong cough reflex and entirely impossible in unconscious patients. The tremoFlo C-100 AOS is a superb alternative for these situations.

  • Airway Resistance - Fast, Easy, Portable.

    Taking measurements with the tremoFlo is fast and easy: only a short period of quiet breathing is required to obtain a reliable measurement of airway resistance, a well-established quantity that clearly and directly reflects airway obstruction. The tremoFlo meets or exceeds all requirements contained in the ERS guidelines for FOT measurements and readily includes normal and percent-predicted values with all applicable measurement outcomes. Given its portable format, the tremoFlo allows you to quickly and effortlessly measure lung function in a wide range of patients and settings.

Contact us to find out more about the tremoFlo. Our application specialists will be happy to demonstrate the tremoFlo to you and answer any questions you might have.


Watch a video of how fast and easy it is to obtain a measurement with the tremoFlo.


Download a brochure describing the tremoFlo in PDF format.


Download detailed technical specifications for the tremoFlo C-100.