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:
Jun. 21, 2005
Filed:
Sep. 08, 2003
Joseph A. Orr, Salt Lake City, UT (US);
Scott A. Kofoed, Salt Lake City, UT (US);
Dwayne Westenskow, Salt Lake City, UT (US);
Michael B. Jaffe, Cheshire, CT (US);
Joseph A. Orr, Salt Lake City, UT (US);
Scott A. Kofoed, Salt Lake City, UT (US);
Dwayne Westenskow, Salt Lake City, UT (US);
Michael B. Jaffe, Cheshire, CT (US);
Respironics Novametrix, Inc., Wallingford, CT (US);
Abstract
Apparatus and methods for non-invasively determining cardiac output using partial re-breathing techniques are disclosed in which the apparatus is constructed with an instantaneously adjustable deadspace for accommodating differences in breathing capacities of various patients. The apparatus is constructed of inexpensive elements, including a single two-way valve which renders the apparatus very simple to use and inexpensive so that the unit may be readily disposable. The method of the invention provides a novel means of estimating cardiac output based on alveolar COvalues rather than end-tidal COvalues as previously practiced. A program for calculating cardiac output is also disclosed.