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:
Jan. 04, 2005
Filed:
Apr. 25, 2001
Magdy Younes, Winnipeg, CA;
Magdy Younes, Winnipeg, CA;
The University of Manitoba, Winnipeg, CA;
Abstract
Method and apparatus are described for determining respiratory system resistance (R) in a patient receiving gas from a ventilator. A negative pulse in the pressure and/or flow output of the ventilator during selected inflation cycles is generated and Paw, {dot over (V)} and V are measured at a point (T) near the beginning of the pulse, at a point (T) near the trough of the negative pulse and at a point (T) preceding T. The value of R is calculated from the difference between Paw, {dot over (V)} and V at Tand at Tand where the change in patient generated pressure (Pmus) in the interval T−Tis estimated by extrapolation from the different between Paw, {dot over (V)} and V and Tand at T, in accordance with Equation 8.