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:
Apr. 09, 2002
Filed:
Sep. 08, 2000
Jingping Xu, Montréal, CA;
Philippe Pibarot, Montréal, CA;
Louis-Gilles Durand, St-Jean-de-Matha, CA;
Other;
Abstract
The method of estimating systolic and mean pulmonary artery pressures of a patient, comprising the steps of (a) producing an electric signal x (t) representative of heart sounds of the patient; (b) extracting second heart sound S (t) from the signal produced in step (a); (c) extracting pulmonary and aortic components P (t) and A (t) from S (t); (d) extracting a signal representative of mean cardiac interval; (e) correlating the pulmonary and aortic components P (t) and A (t) to obtain a cross correlation function; (f) measuring a splitting interval of the cross correlation function obtained in step (e); (g) producing a normalized splitting interval; and (h) estimating the systolic and mean pulmonary artery pressures by means of predetermined regressive functions. The present invention also relates to an apparatus for estimating systolic and mean pulmonary artery pressures of a patient.