BLOOD PRESSURE ESTIMATION DEVICE, BLOOD PRESSURE ESTIMATION METHOD, BLOOD PRESSURE MEASUREMENT DEVICE, AND RECORDING MEDIUM

• US 20170181648A1
• Filed: 02/13/2015
• Published: 06/29/2017
• Est. Priority Date: 02/13/2014
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: OHNO, Yuji, KUBO, Masahiro, TAKOH, Kimiyasu, ALTINTAS, Ersin, IMAI, Hiroshi, ABE, Katsumi, TOCHIKUBO, Osamu
• Granted Patent: US 10,194,811 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 5/02108 from analysis of pulse wave characteristics
• CPC Class Codes: A61B 5/02225 using the oscillometric method
• CPC Class Codes: A61B 5/0225 the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds
• CPC Class Codes: A61B 5/6824 Arm or wrist
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence

Abstract

Disclosed are a blood pressure estimation device, etc., that is capable of highly accurate estimation of blood pressure. The blood pressure estimation device (101) has a blood pressure estimation unit (102) that: finds a specific blood pressure related to pulse wave information (2002), by browsing blood pressure information (2001) associating the pulse wave information and blood pressure related to pulse wave signals caused by blood pressure during a specific period and measured, the pulse wave information associating blood pressure during the specific period and the pulse wave signals; and estimates the blood pressure relating to the pulse wave information (2002) on the basis of the found specific blood pressure.

Claims

1. A blood pressure estimation device comprising:

a blood pressure estimation unit configured to determine a particular blood pressure associated with particular pulse wave information by referring to blood pressure information where (i) pulse wave information where a pressure in a certain time period and a pulse wave signal measured on the basis of the pressure in the certain time period are associated and (ii) a blood pressure for the pulse wave signal are associated, and estimate a blood pressure for the particular pulse wave information on the basis of the determined particular blood pressure.

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

the blood pressure estimation unit calculates a degree of similarity representing an extent that pulse wave information for the pulse wave signal and the particular pulse wave information are similar to each other and estimates, as the particular blood pressure, the blood pressure associated with the pulse wave information in which the degree of similarity is equal to or larger than a particular threshold.

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

the pulse wave information represents information where a pulse wave value for the pulse wave signal satisfying a predetermined condition and the blood pressure are associated, and

the degree of similarity represents a degree of similarity between (iii) a pressure value and the pulse wave value associated with each other in the particular pulse wave information and (iv) a pressure value and the pulse wave value associated with each other in the pulse wave information.

4. The blood pressure estimation device according to claim 1, further comprising:

a signal storage unit configured to store the blood pressure information; and

a signal search unit configured to read the blood pressure information satisfying a particular condition from the signal storage unit wherein

the blood pressure estimation unit estimates a blood pressure for the pulse wave information on the basis of the blood pressure information read by the signal search unit and the particular pulse wave information.

5. A blood pressure measurement device comprising

the pressure estimation device according to claim 1,

the blood pressure estimation device estimating a blood pressure in a process of pressurization performed by a cuff.

6. The blood pressure measurement device according to claim 5, further comprising:

a first pulse wave measurement unit configured to measure a pulse wave in the certain time period by using the pressure in an upstream of an artery, and transmitting the measured pulse wave to the blood pressure estimation device as the pulse wave signal; and

a second pulse wave measurement unit configured to measure the pulse wave in the certain time period using the pressure in a downstream of the artery and transmitting the measured pulse wave to the blood pressure estimation device as the pulse wave signal,

the blood pressure estimation device receives the pulse wave signal transmitted by the first pulse wave measurement unit and the pulse wave signal transmitted by the second pulse wave measurement unit and estimates the blood pressure on the basis of the received two pulse wave signals.

7. The blood pressure measurement device according to claim 6, wherein

the first pulse wave measurement unit and the second pulse wave measurement unit are located to sandwich a pressurization center or substantially the center of a shorter side direction in the cuff.

8. The blood pressure measurement device according to claim 6, wherein

the first pulse wave measurement unit or the second pulse wave measurement unit is a vibration sensor that detects vibrations.

9. A blood pressure estimation method comprising:

determining, by using an information processing device, a particular blood pressure associated with particular pulse wave information by referring to blood pressure information where (i) pulse wave information where a pressure in a certain time period and a pulse wave signal measured on the basis of the pressure in the certain time period are associated and (ii) a blood pressure for the pulse wave signal are associated, and estimating a blood pressure for the particular pulse wave information on the basis of the determined particular blood pressure.

10. A non-transitory recording medium recording a blood pressure estimation program that causes a computer to realize

a blood pressure estimation function for determining a particular blood pressure associated with particular pulse wave information by referring to blood pressure information where (i) pulse wave information where a pressure in a certain time period and a pulse wave signal measured on the basis of the pressure in the certain time period are associated and (ii) a blood pressure for the pulse wave signal are associated, and estimating a blood pressure for the particular pulse wave information on the basis of the determined particular blood pressure.