System and method of assessment of arousal, pain and stress during anesthesia and sedation
CA 2479916 C · Owner: Dahan, Albert · Inventors: Dahan, Albert; Greenwald, Scott D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A PTT (Pulse Transit Time) monitoring system for measuring arousal and responses to stress or pain during sedation or anesthesia includes ECG electrodes and a PPG (photo plethysmography) probe connected to a computer via signal conditioning and digitizing hardware. The ECG and PPG waveforms are continuously analyzed to update and display a current estimate of the subject's PPT from heart to hand. For each cardiac cycle fiducial points are , identified to indicate the pulse onset time (via QRS detection in the ECG) and pulse arrival time (via the point of steepest ascent in the PPG). Finally the , current PTT estimate is displayed numerically and the trend of PTT is updated every …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed April 1, 2003 and granted October 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.