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. 28, 1999
Filed:
Feb. 06, 1998
Applicant:
Inventors:
Jian Ling, San Antonio, TX (US);
Dean Carl Winter, San Antonio, TX (US);
Brian L Robey, San Antonio, TX (US);
Assignee:
Southwest Research Institute, San Antonio, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61N / ;
U.S. Cl.
CPC ...
600481 ; 128920 ; 600300 ;
Abstract
A method of monitoring cardiac output. The method uses a blood pressure waveform as input. The waveform is digitized and various blood pressure features are extracted. The features are used as inputs to a fuzzy logic model, where each input is fuzzified by determining its degree of confidence as a member of one or more fuzzy membership regions. A rule base is applied to the defuzzified inputs to obtain a fuzzy stroke volume index. This output is defuzzied and used to calculate cardiac output.