Heart-sound detecting apparatus and heart-sound detecting method
First Claim
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1. An apparatus for detecting a heart sound of a living subject, comprising:
- a pressure-pulse-wave sensor which is adapted to be worn on a body portion of the subject that is distant from a chest of the subject, detects a pressure pulse wave produced by an artery of the body portion, and generates a pressure-pulse-wave signal representing the detected pressure pulse wave; and
a heart-sound extracting means for extracting, from the pressure-pulse-wave signal generated by the pressure-pulse-wave sensor, a heart-sound component representing the heart sound of the subject.
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Abstract
An apparatus for detecting a heart sound of a living subject, including a pressure-pulse-wave sensor which is adapted to be worn on a body portion of the subject that is distant from a chest of the subject, detects a pressure pulse wave produced by an artery of the body portion, and generates a pressure-pulse-wave signal representing the detected pressure pulse wave; and a heart-sound extracting device for extracting, from the pressure-pulse-wave signal generated by the pressure-pulse-wave sensor, a heart-sound component representing the heart sound of the subject.
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Citations
7 Claims
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1. An apparatus for detecting a heart sound of a living subject, comprising:
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a pressure-pulse-wave sensor which is adapted to be worn on a body portion of the subject that is distant from a chest of the subject, detects a pressure pulse wave produced by an artery of the body portion, and generates a pressure-pulse-wave signal representing the detected pressure pulse wave; and
a heart-sound extracting means for extracting, from the pressure-pulse-wave signal generated by the pressure-pulse-wave sensor, a heart-sound component representing the heart sound of the subject. - View Dependent Claims (3, 4, 5, 7)
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2. An apparatus for detecting a heart sound of a living subject, comprising:
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a pressure-pulse-wave sensor which is adapted to be worn on a body portion of the subject that is distant from a chest of the subject, and includes a plurality of pressure sensing elements arranged in a widthwise direction of an artery of the body portion, each of the pressure sensing elements detecting a pressure pulse wave produced by the artery of the body portion, and generating a pressure-pulse-wave signal representing the detected pressure pulse wave;
an optimum-element selecting means for selecting one of the pressure sensing elements, as an optimum pressure sensing element, based on respective magnitudes of the respective-pressure-pulse-wave signals generated by the pressure sensing elements; and
a heart-sound extracting means for extracting, from the pressure-pulse-wave signal generated by the optimum pressure sensing element, a heart-sound component representing the heart sound of the subject.
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6. An apparatus for measuring a blood pressure of a living subject, comprising:
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an inflatable cuff which is adapted to be wound around an upper arm of the subject;
a blood-pressure determining means for determining the blood pressure of the subject based on a signal which is produced in the cuff while a pressing pressure of the cuff is gradually changed;
a pressure-pulse-wave sensor which is provided in an inner surface of the cuff, detects a pressure pulse wave produced by an artery of the upper arm, and generates a pressure-pulse-wave signal representing the detected pressure pulse wave; and
a heart-sound extracting means for extracting, from the pressure-pulse-wave signal generated by the pressure-pulse-wave sensor, a heart-sound component representing the heart sound of the subject.
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Specification