Method and apparatus for estimating systolic and mean pulmonary artery pressures of a patient
US6368283B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Oct 10, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7275
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The method of estimating systolic and mean pulmonary artery pressures of a patient, comprising the steps of (a) producing an electric signal xs(t) representative of heart sounds of the patient; (b) extracting second heart sound S2(t) from the signal produced in step (a); (c) extracting pulmonary and aortic components P2(t) and A2(t) from S2(t); (d) extracting a signal representative of mean cardiac interval; (e) correlating the pulmonary and aortic components P2(t) and A2(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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.