Device and method for central blood pressure estimation

• US 20050283087A1
• Filed: 06/14/2005
• Published: 12/22/2005
• Est. Priority Date: 06/15/2004
• Status: Abandoned Application

• Current Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Original Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Inventors: Miyawaki, Yoshinori, Sawada, Shogo, Takazawa, Kenji, Kobayashi, Tatsuya, Satoh, Hironori
• Application Number:
  US11/151,648
• Publication Number:
  US 20050283087A1
• Time in Patent Office: Days
• US Class Current: 600/500
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers

Abstract

A sensor unit is brought into contact with a surface of a living body to detect a pulse wave of an artery directly below. A CPU extracts a characteristic point of the pulse wave detected and obtains a second systolic component in the pulse wave using the characteristic point extracted. Then, a variation with time in a systolic blood pressure of a central artery of the living body is estimated using the second systolic component obtained, and an estimated variation with time in the systolic blood pressure is displayed on a display portion. For estimation of the systolic blood pressure, arithmetic with a linear transformation is applied using the second systolic component obtained and a blood pressure of a peripheral artery which is measured beforehand with an electronic sphygmomanometer.

Claims

1. A central blood pressure estimation device, comprising:

a pulse wave detection portion brought into contact with a surface of a living body for detecting a pulse wave of an artery directly below;

a portion for obtaining a second systolic component in said pulse wave detected by said pulse wave detection portion;

an estimation portion for estimating a variation with time in a systolic blood pressure of a central artery of said living body using said second systolic component obtained with said portion for obtaining a second systolic component; and

a display portion for displaying the variation with time in said systolic blood pressure estimated by said estimation portion.

2. The central blood pressure estimation device according to claim 1, wherein

said estimation portion estimates said systolic blood pressure of said central artery of said living body using a blood pressure of said living body measured beforehand and said second systolic component obtained with said portion for obtaining a second systolic component.

3. The central blood pressure estimation device according to claim 2, wherein

the blood pressure of said living body measured beforehand is a blood pressure of a peripheral artery of the living body.

4. The central blood pressure estimation device according to claim 1, wherein

a linear transformation is used in estimation of said estimation portion.

5. The central blood pressure estimation device according to claim 1, wherein

said display portion successively displays said systolic blood pressure estimated by said estimation portion in time sequence.

6. The central blood pressure estimation device according to claim 5, wherein

said systolic blood pressure for each heart beat is successively displayed.

7. The central blood pressure estimation device according to claim 1, wherein

said display portion displays said systolic blood pressure or a variation thereof with time associated with another index relating to a blood pressure.

8. The central blood pressure estimation device according to claim 7, wherein

said index is a blood pressure of a peripheral artery of said living body or a variation thereof with time.

9. The central blood pressure estimation device according to claim 8, wherein

said display portion displays said systolic blood pressure or a variation thereof with time and the blood pressure of the peripheral artery of said living body or a variation thereof with time in comparison with each other on a two-dimensional graph.

10. A central blood pressure estimation device, comprising:

a pulse wave detection portion brought into contact with a surface of a living body for detecting a pulse wave of an artery directly below;

a portion for obtaining a second systolic component in said pulse wave detected by said pulse wave detection portion;

a calculation portion for calculating a variation with time in the second systolic component obtained with said portion for obtaining a second systolic component; and

a display portion for displaying the variation with time in the second systolic component calculated by said calculation portion.

11. A method for estimating a central blood pressure, comprising the steps of:

detecting a pulse wave using a sensor brought into contact with a surface of a living body to detect a pulse wave of an artery directly below;

obtaining a second systolic component in said pulse wave detected in said step of detecting a pulse wave;

estimating a systolic blood pressure of a central artery of said living body using said second systolic component obtained in said step of obtaining a second systolic component; and

displaying a variation with time in said systolic blood pressure estimated in said step of estimating.

12. A method for estimating a central blood pressure, comprising the steps of:

detecting a pulse wave with contact with a surface of a living body to detect a pulse wave of an artery directly below;

obtaining a second systolic component in the pulse wave detected in said step of detecting a pulse wave;

calculating a variation with time in the second systolic component obtained with said step of obtaining a second systolic component; and

displaying the variation with time in the second systolic component calculated in said step of calculating.