The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 2021
Filed:
Feb. 28, 2018
Thornhill Scientific Inc., Toronto, CA;
Joseph Fisher, Thornhill, CA;
David Preiss, Thornhill, CA;
Takafumi Azami, Nagoya, JP;
Alex Vesely, Victoria, CA;
Eitan Prisman, Toronto, CA;
Ron Somogyi, Toronto, CA;
Steve Iscoe, Kingston, CA;
THORNHILL SCIENTIFIC INC., North York, CA;
Abstract
A method of identifying alveolar ventilation (V) in a subject, the method comprising: (1) using a breathing circuit which, at exhalation, keeps exhaled gas separate from inhaled gas and at inhalation, when a first gas set (FGS) flow is less than the subject's minute ventilation (V), results in a subject inhaling FGS first and then a second gas set (SGS), for the balance of inhalation; (2) setting the FGS flow at a rate greater that V; (3) measuring an end tidal COconcentration at a steady state; (4) progressively lowering the FGS flow until a time equal to a recirculation time of COin the subject; and (5) deriving Vas the rate of FGS flow at the intersection between an average PETCOin a steady state and a line fit to the PETCOvalues after the rise in PETCOvalues begins until the recirculation time.