PULMONARY ARTERY PRESSURE ESTIMATOR

• US 20120071767A1
• Filed: 03/21/2011
• Published: 03/22/2012
• Est. Priority Date: 04/16/2004
• Status: Abandoned Application

• Current Assignee: Boris Popov, Rajeev Agarwal, Victor F. Lanzo
• Original Assignee: Boris Popov, Rajeev Agarwal, Victor F. Lanzo
• Inventors: Popov, Boris, Lanzo, Victor F., Agarwal, Rajeev
• Application Number:
  US13/053,202
• Publication Number:
  US 20120071767A1
• Time in Patent Office: Days
• US Class Current: 600/485
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 7/04 Electric stethoscopes microphones, acoustic transducers therefor H04R

Abstract

A pulmonary artery pressure estimator attaches a plurality of acoustic sensors to a patient so as to measure a second heart sound. The sensors are arranged so that an A2 component of the second heart sound is maximized from at least one of the sensors and a P2 component is maximized from at least another one of the sensors. Electrodes are also attached to the patient so as to measure a cardiac interval. A splitting interval is derived from the A2 and P2 components, which is normalized by the cardiac interval. The normalized splitting interval provides an estimation of the pulmonary artery pressure (PAP).

Claims

1. A pulmonary artery pressure estimator comprising:

a first biological sound sensor located on a person proximate the apex of the heart so that an A2 component of a second heart sound is maximal in intensity and a P2 component of the second heart sound is minimal in intensity;

a second biological sound sensor located on the person proximately between the third and fourth left intercostal space so that the P2 component is maximal in intensity;

a plurality of electrodes located on the person so as to generate ECG signals;

a data acquisition system in communications with the sound sensors and electrodes so as to derive the second heart sounds components from the sound sensors and an ECG from the electrode ECG signals;

the data acquisition system derives a splitting interval (SI=P2−

A2) from the sound sensors;

the data acquisition system derives a cardiac interval (CI) from the electrodes; and

the data acquisition system estimates a pulmonary artery pressure from the splitting interval normalized by the cardiac interval.

2. A pulmonary artery pressure estimating method comprising:

attaching a first acoustic sensor and a second acoustic sensor to a person so as to measure a second heart sound;

locating the first acoustic sensor on the person so as to maximize an A2 component of the second heart sound and minimize a P2 component of the second heart sound;

locating the second acoustic sensor on the person so as to maximize the P2 component;

attaching electrodes to the person so as to measure an ECG;

deriving a splitting interval from the first and second acoustic sensors;

deriving a cardiac interval from the electrodes; and

estimating a pulmonary artery pressure from the splitting interval normalized by the cardiac interval.