Diagnostic apparatus for analyzing arterial pulse waves

• US 7,192,402 B2
• Filed: 06/16/2004
• Issued: 03/20/2007
• Est. Priority Date: 01/07/1993
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Amano, Kazuhiko, Kasahara, Hiroshi, Kodama, Kazuo, Ishiyama, Hitoshi
• Primary Examiner(s): Nasser; Robert L.
• Application Number:
  US10/869,613
• Publication Number:
  US 20040230125A1
• Time in Patent Office: 1,007 Days
• Field of Search: None
• US Class Current: 600/500
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/043 in a linear array
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02108 from analysis of pulse wave characteristics
• CPC Class Codes: A61B 5/4854 Diagnosis based on concepts of traditional oriental medicine
• CPC Class Codes: A61B 5/6806 Gloves
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: G16H 10/60 for patient-specific data, e.g. for electronic patient records
• CPC Class Codes: G16H 15/00 ICT specially adapted for medical reports, e.g. generation or transmission thereof
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders

Abstract

A pulse wave analyzing apparatus that detects a pulse wave from a living body and computes a waveform distortion factor and determines a waveform shape for performing a diagnosis of a condition of the living body.

Claims

1. A pulse wave analyzing apparatus comprising:

pulse wave detecting means for detecting a pulse wave from a living body;

distortion computing means for computing a waveform distortion factor of the pulse wave detected by the pulse wave detecting means, the waveform distortion factor being identified as

$d=\frac{\sqrt{Q_2^2+Q_3^2+\mathrm{\cdots <br><br>}+Q_n^2}}{Q_1},$

 

d denoting the waveform distortion factor, and Q_n denoting amplitude of the nth harmonic; and

waveform determining means for determining a waveform shape on the basis of the waveform distortion factor computed by the distortion computing means.

2. A pulse wave analyzing apparatus as in claim 1, wherein the living body is a living human body.

3. A pulse wave analyzing apparatus comprising:

pulse wave inputting means for inputting information representing a pulse wave of a living body;

distortion computing means for computing a waveform distortion factor from the information representing a pulse wave, the waveform distortion factor being identified as

$d=\frac{\sqrt{Q_2^2+Q_3^2+\mathrm{\cdots <br><br>}+Q_n^2}}{Q_1},$

 

d denoting the waveform distortion factor, and Q_n denoting amplitude of the nth harmonic; and

parameter obtaining means for obtaining parameters relating to circulatory dynamic parameters on the basis of the waveform distortion factor computed by the distortion computing means.

4. A pulse wave analyzing apparatus as in claim 3, further comprising a reading means for reading out the information representing a pulse wave from a storage media.

5. A pulse wave analyzing apparatus in accordance with claim 3, wherein the pulse wave inputting means is a pulse wave detecting means for detecting the pulse wave of a living body non-invasively.

6. A pulse wave analyzing apparatus in accordance with claim 3, further comprising a writing means for writing the circulatory dynamic parameters into a storage media.

7. A pulse wave analyzing apparatus in accordance with claim 3, wherein the living body is a living human body.

8. A diagnostic apparatus comprising:

analyzing means for creating waveform parameters from information representing a pulse wave of a living body; and

diagnostic means for performing a diagnosis of a condition of the living body on the basis of the waveform parameters,

wherein the analyzing means comprises;

distortion computing means for computing a waveform distortion factor from the information representing the pulse wave, the waveform distortion factor being identified as

$d=\frac{\sqrt{Q_2^2+Q_3^2+\mathrm{\cdots <br><br>}+Q_n^2}}{Q_1},$

 

d denoting the waveform distortion factor, and Q_n denoting amplitude of the nth harmonic; and

waveform determining means for determining a waveform shape on the basis of the waveform distortion factor computed by the distortion computing means;

and wherein the diagnostic means performs the diagnosis of the condition of the living body on the basis of the waveform shape.

9. A diagnostic apparatus comprising:

analyzing means for creating waveform parameters from information representing a pulse wave of a living body; and

diagnostic means for performing a diagnosis of a condition of the living body on the basis of the waveform parameters,

wherein the analyzing means comprises;

distortion computing means for computing a waveform distortion factor from the information representing the pulse wave, the waveform distortion factor being identified as

$d=\frac{\sqrt{Q_2^2+Q_3^2+\mathrm{\cdots <br><br>}+Q_n^2}}{Q_1},$

 

d denoting the waveform distortion factor, and Q_n denoting amplitude of the nth harmonic; and

parameter obtaining means for obtaining parameters relating to circulatory dynamic parameters on the basis of the waveform distortion factor computed by the distortion computing means; and

wherein the diagnostic means performs the diagnosis of the condition of the living body on the basis of the parameters.

10. A diagnostic apparatus comprising:

analyzing means for creating waveform parameters from information representing a pulse wave of a living body; and

diagnostic means for performing a diagnosis of a condition of the living body on the basis of the waveform parameters,

wherein the analyzing means comprises;

distortion computing means for computing a waveform distortion factor from the information representing the pulse wave, the waveform distortion factor being identified as

$d=\frac{\sqrt{Q_2^2+Q_3^2+\mathrm{\cdots <br><br>}+Q_n^2}}{Q_1},$

 

d denoting the waveform distortion factor, and Q_n denoting amplitude of the nth harmonic;

waveform determining means for determining a waveform shape on the basis of the waveform distortion factor computed by the distortion computing means; and

parameter obtaining means for obtaining parameters relating to circulatory dynamic parameters on the basis of the waveform distortion factor computed by the distortion computing means; and

wherein the diagnostic means performs the diagnosis of the condition of the living body on the basis of the parameters and the waveform shape.