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:
Dec. 16, 2014
Filed:
Jan. 29, 2010
Magdy Younes, Winnipeg, CA;
Magdy Younes, Winnipeg, CA;
YRT Limited, Winnipeg, Manitoba, CA;
Abstract
Gas leakage from a ventilator circuit and patient interface is estimated by a method that relies on breath-by-breath or time-to-time variability in the pattern of pressure delivery by the ventilator, comprising generating signals that correspond to pressure (P) and flow rate (Flow) in the ventilator circuit, integrating flow (Integrated Flow), measuring the change in Integrated Flow (ΔV) over an INTERVAL extending from a selected point in the expiratory phase of a ventilator cycle to a selected point during the expiratory phase of a nearby ventilator cycle, repeating the measurement of ΔV for at least two said INTERVALs, processing Pto produce an index or indices that reflect(s) the pattern of pressure delivery by the ventilator during each of said INTERVALs, applying statistical methods to determine the relation between the differences in ΔV among 1NTERVALs and the corresponding differences in said index or indices of P, and establishing from said relation the leak rate at specified Pvalues.