SPHYGMOMANOMETER SYSTEM

• US 20160150984A1
• Filed: 07/10/2013
• Published: 06/02/2016
• Est. Priority Date: 07/10/2013
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kandori, Akihiko, Sano, Yuko, Tsuji, Toshio, HIRANO, Harutoyo
• Granted Patent: US 10,588,521 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/04 Arrangements of multiple sensors of the same type
• CPC Class Codes: A61B 5/02116 of pulse wave amplitude A61B5/02225 takes precedence
• 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 5/02241 of small dimensions, e.g. adapted to fingers
• CPC Class Codes: A61B 5/7405 using sound
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence

Abstract

The present invention provides a sphygmomanometer system, including a measurement device pressed against a predetermined part to be measured so that the part to be measured is held down, and a blood pressure measurement device to measure blood pressure based on information from the measurement device. The measurement device includes an average blood pressure detection unit to obtain information on pressure applied to the measurement device, and a blood pressure change amount detection unit to detect a minute change of the part to be measured when the blood pressure change amount detection unit contacts with the part to be measured. The processor of the blood pressure measurement device calculates the average blood pressure, the highest blood pressure, and the lowest blood pressure based on information on pressure obtained from the blood pressure change amount detection unit and the average blood pressure detection unit.

Claims

1. A sphygmomanometer system for measuring blood pressure of a predetermined part to be measured of a subject, the sphygmomanometer system comprising:

a measurement device pressed against the predetermined part to be measured by a finger of a measurer so that the predetermined part to be measured is held down in measurement of the blood pressure; and

a blood pressure measurement device configured to measure the blood pressure according to information from the measurement device,

wherein the measurement device includes;

a finger holding part configured to hold the finger of the measurer onto the measurement device;

a first detection unit configured to obtain information on pressure applied to the predetermined part to be measured via the measurement device by a force of the finger of the measurer held by the finger holding part; and

a second detection unit configured to detect a minute change in the predetermined part to be measured due to pulse when the second detection unit contacts with the predetermined part to be measured together with the first detection unit,

wherein the blood pressure measurement device includes;

a processor configured to calculate an average blood pressure according to information on pressure obtained from the first detection unit and calculate a highest blood pressure and a lowest blood pressure according to information on pressure obtained from the second detection unit; and

a display unit configured to display a result of calculation of the processor.

2. The sphygmomanometer system according to claim 1,

wherein the measurement device further includes:

a first spring configured to be pressed when the first detection unit is pressed against the predetermined part to be measured and apply repulsion to the first detection unit;

a second spring configured to be pressed when the second detection unit is pressed against the predetermined part to be measured and apply repulsion to the second detection unit, the second spring having a spring constant smaller than that of the first spring; and

a magnetic field generation unit fixed to a part of the measurement device other than the first detection unit and the second detection unit and configured to generate a magnetic field,

wherein the first detection unit includes a first magnetic field detection unit configured to output voltage information according to magnitude of pressure received from the predetermined part to be measured based on the magnetic field generated by the magnetic field generation unit,

wherein the second detection unit includes a second magnetic field detection unit configured to output voltage information according to magnitude of pressure received from the predetermined part to be measured based on the magnetic field generated by the magnetic field generation unit,

wherein the blood pressure measurement device further includes a storage unit configured to store first association information indicating a relation between the magnitude of the voltage output by the first magnetic field detection unit and the magnitude of the pressure applied to the first detection unit from the predetermined part to be measured and second association information indicating a relation between the magnitude of voltage output by the second magnetic field detection unit and the magnitude of the pressure applied to the second detection unit from the predetermined part to be measured, and

wherein the processor calculates an average blood pressure according to the voltage information obtained from the first magnetic field detection unit and the first association information, and calculates highest blood pressure and lowest blood pressure according to the average blood pressure, the voltage information obtained from the second magnetic field detection unit, and the second association information.

3. The sphygmomanometer system according to claim 1,

wherein the blood pressure measurement device further includes a sound generation unit, and

the processor of the blood pressure measurement device uses the sound generation unit to repeat sound guidance to the measurer to strengthen or weaken the force pressing a measurement device against the predetermined part to be measured until the calculated value of the average blood pressure does not become larger any more, and displays the average blood pressure on the display unit when the calculated value of the average blood pressure is determined to be maximum.

4. The sphygmomanometer system according to claim 2,

wherein the first magnetic field detection unit is a first receiving coil,

the second magnetic field detection unit is a second receiving coil, and

the second receiving coil has a circular shape while the first receiving coil has

a hollow circular shape and is disposed around the second receiving coil so that the first receiving coil and the second receiving coil do not contact with each other within a plane in a direction of vertical motion.

5. The sphygmomanometer system according to claim 2, further comprising:

an offset/gain adjustment unit configured to adjust a sensitivity characteristic of voltage from the first magnetic field detection unit to be closer to a sensitivity characteristic of voltage from the second magnetic field detection unit; and

a difference processing unit configured to subtract a voltage value obtained by adjusting a value of the voltage from the first magnetic field detection unit using the offset/gain adjustment unit from the value of voltage from the second magnetic field detection unit, wherein

the processor uses output information from the difference processing unit as a voltage information obtained from the second magnetic field detection unit.

6. The sphygmomanometer system according to claim 2,

wherein the finger holding part has a substantially cylindrical finger-sac shape.

7. The sphygmomanometer system according to claim 2,

wherein the blood pressure measurement device further includes a sound generation unit, and

the processor of the blood pressure measurement device uses the sound generation unit to repeat sound guidance to the measurer to strengthen or weaken the force pressing a measurement device against the predetermined part to be measured until the calculated value of the average blood pressure does not become larger any more, and displays the average blood pressure on the display unit when the calculated value of the average blood pressure is determined to be maximum.