BLOOD PRESSURE MEASUREMENT DEVICE AND CONTROL METHOD OF THE SAME

• US 20100210957A1
• Filed: 04/23/2010
• Published: 08/19/2010
• Est. Priority Date: 10/25/2007
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Public University Corporation Yokohama City University, Terumo Kabushiki Kaisha
• Inventors: INOUE, Kouichi, Tochikubo, Osamu
• Granted Patent: US 8,348,851 B2
• Time in Patent Office: Days
• US Class Current: 600/493
• CPC Class Codes: A61B 5/02141 Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits A61B5/02233, A61B5/0235 take precedence
• 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

Abstract

This invention provides a user with information by which the reliability of a measured blood pressure value can be determined. A blood pressure measurement device includes a cuff which presses a blood pressure measurement portion, a pressure control means for pressurizing or depressurizing the interior of the cuff, a pressure sensor which senses the internal pressure of the cuff, a pulse wave signal extracting means for extracting time-series data of a pulse wave signal superposed on the cuff internal pressure sensed by the pressure sensor, in the process in which the pressure control means pressurizes or depressurizes the cuff, and a display means for displaying a pulse waveform corresponding to a pulse wave signal of at least one period, together with the value of a cuff internal pressure corresponding to the pulse wave signal, based on the extracted pulse wave signal time-series data.

Claims

1. A blood pressure measurement device comprising:

a cuff adapted to press a blood pressure measurement portion;

a pressure control unit adapted to pressurize or depressurize an interior of said cuff;

a pressure sensor adapted to sense an internal pressure of said cuff;

a pulse wave signal extracting unit adapted to extract time-series data of a pulse wave signal superposed on the cuff internal pressure sensed by said pressure sensor, in a process in which said pressure control unit pressurizes or depressurizes said cuff; and

a display unit adapted to display a pulse waveform corresponding to a pulse wave signal of at least one period, together with a value of a cuff internal pressure corresponding to the pulse wave signal, based on the extracted pulse wave signal time-series data.

2. The blood pressure measurement device according to claim 1, further comprising:

a list display unit adapted to display, in a form of a list for each period, each of a plurality of one-period pulse wave signals contained in the extracted pulse wave signal time-series data; and

a selecting unit adapted to select one of the plurality of one-period pulse wave signals displayed in the form of a list,

wherein said display unit displays the one-period pulse wave signal selected by said selecting unit, together with a value of a cuff internal pressure corresponding to the one-period pulse wave signal.

3. The blood pressure measurement device according to claim 1, further comprising:

a time-series display unit adapted to display the extracted pulse wave signal time-series data as a two-dimensional graph in which the cuff internal pressure is plotted on a first axis and time is plotted on a second axis; and

a selecting unit adapted to select one time included in a period of the pulse wave signal time-series data displayed as the two-dimensional graph,

wherein said display unit displays a one-period pulse wave signal corresponding to the time selected by said selecting unit, together with a value of a cuff internal pressure corresponding to the one-period pulse wave signal.

4. The blood pressure measurement device according to claim 1, wherein said display unit updates and displays, every pre-designated time interval, a pulse waveform corresponding to a pulse wave signal of latest N periods (N is a natural number) contained in the pulse wave signal time-series data extracted by said pulse wave signal extracting unit, together with a value of a cuff internal pressure corresponding to the pulse wave signal.

5. The blood pressure measurement device according to claim 1, wherein a temporal resolution of the pulse wave signal time-series data is not less than 250 Hz.

6. The blood pressure measurement device according to claim 1, wherein said cuff includes a large cuff for blocking a blood vessel connected via a fluid resistance, and a small cuff for detecting a pulse wave.

7. A control method of a blood pressure measurement device comprising a cuff configured to press a blood pressure measurement portion, a pressure control unit which pressurizes or depressurizes, an interior of the cuff, and a pressure sensor which senses an internal pressure of the cuff, comprising:

extracting time-series data of a pulse wave signal superposed on a cuff internal pressure sensed by the pressure sensor, while the pressure control unit is pressurizing or depressurizing the cuff; and

displaying a pulse waveform corresponding to a pulse wave signal of at least one period, together with a value of a cuff internal pressure corresponding to the pulse wave signal, based on the extracted pulse wave signal time-series data.