JP2010154936A - Sphygmomanometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sphygmomanometer capable of intuitively presenting not only a blood pressure value but also a state in the middle of blood pressure measurement. <P>SOLUTION: The sphygmomanometer 1 has a signal processing part 16 comprising a pulse wave filter 31 for extracting pulse wave components, a quintuple amplifier 33 for amplifying the pulse wave components, and a pressure filter 32 for extracting blood pressure components. A CPU 20 displays pressure component display 111 indicating a cuff pressure at present, pulse wave component display 112 indicating the size of the pulse wave at present, and mercury column display 110 composed of the scale 113 of a mercury column on the measured result display screen 100 of a display part 19 by executing measured result display processing. Especially, the pressure component display 111 corresponding to the blood pressure component is displayed at the base part of the mercury column display 110, and the pulse wave component display 112 corresponding to pulse change is displayed at the upper end in a different color. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sphygmomanometer that measures blood pressure using a cuff, and more particularly to a sphygmomanometer capable of oscillometric blood pressure measurement.

  One common blood pressure measurement method is called an oscillometric method (see, for example, Patent Document 1). In the oscillometric method, the cuff pressure is increased or decreased by air supply / exhaust to the cuff wound around the upper arm, and the pulse wave detected at that time has a relatively significant amplitude increase (or the maximum amplitude). Cuff pressure is determined as systolic blood pressure (maximum blood pressure), and when the amplitude decrease is relatively significant (or when the amplitude falls below a specific ratio with respect to the maximum value) Is determined as the diastolic blood pressure (minimum blood pressure).

In addition, an automatic sphygmomanometer that digitally displays a blood pressure value mainly for consumer use is widespread.
JP 2007-44437 A

  However, in the conventional sphygmomanometer, the blood pressure value is only digitally displayed, and the state during blood pressure measurement cannot be intuitively known. Also, even if there is an arrhythmia or body movement during the measurement, it is not understood only by looking at the blood pressure value displayed during the measurement. In this case, the reliability of the measured value decreases.

  The present invention has been made in view of such a point, and an object thereof is to provide a sphygmomanometer that can intuitively present not only a blood pressure value but also a state during blood pressure measurement.

  The sphygmomanometer of the present invention includes a measuring unit that measures cuff pressure data using a cuff, an extracting unit that extracts a blood pressure component and a pulse wave component based on the measured cuff pressure data, and an extracted Generating means for generating measurement display data for associating the blood pressure component and the pulse wave component and displaying the blood pressure component and the pulse wave component in a visually recognizable manner, and displaying the generated measurement display data on a screen; And a display means.

  According to the present invention, not only the blood pressure value but also a state during blood pressure measurement can be presented intuitively. While displaying the blood pressure in the middle of the measurement, the minute change in the pulse in the middle of the measurement is also displayed in an easy-to-understand manner, so that the trouble during the measurement can be detected in advance and the reliability can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a sphygmomanometer according to an embodiment of the present invention. The sphygmomanometer of the present embodiment is an example applied to an automatic sphygmomanometer that performs oscillometric blood pressure measurement.

  In FIG. 1, a sphygmomanometer 1 includes a cuff 10, a hose 11, a pipe 12, a pressure sensor 13, a pump 14, an exhaust valve 15, a signal processing unit 16, a pump driving unit 17, a valve driving unit 18, a display unit 19, a CPU ( Central Processing Unit) 20, an operation unit 21, and a storage unit 22.

  The cuff 10 is a band-like body that can be wound around a blood pressure measurement site of a subject, for example, the upper arm, and has an air bag (not shown) that communicates with the pump 14 via a hose 11 and a tube 12 inside. . The air bag can be inflated and contracted by introducing and exhausting air into the internal space. The air bag is provided in alignment with the central portion of the cuff 10 in the width direction (width direction during winding). Therefore, since the thickness of the central part becomes larger than the thickness of the end part when inflated by supply air, the cuff 10 compresses the measurement site with a certain width at the time of blood pressure measurement. Is stronger than the edge.

  The pressure sensor 13 is a pressure-electrical converter using a semiconductor pressure sensor, for example, and is provided in the pipe 12. The pressure sensor 13 measures the cuff pressure by converting the air pressure (cuff pressure) of the air bag of the cuff 10 into an electric signal and outputting it as a cuff pressure signal to the signal processing unit 16.

  The pump 14 pressurizes the cuff pressure by supplying air to the air bag of the cuff 10 through the pipe 12 and the hose 11. The pump drive unit 17 has a control circuit that drives the pump 14 by outputting a drive signal of the pump 14 to the pump in accordance with an instruction signal from the CPU 20, and starts and stops supply of air from the pump 14 to the cuff 10.

  The exhaust valve 15 is an electromagnetic valve, for example, and is provided in the pipe 12. The exhaust valve 15 prevents exhaust from the air bag of the cuff 10 when the valve is closed, and exhausts air in the air bag of the cuff 10 through the hose 11 and the pipe 12 when the valve is opened. The valve drive unit 18 has a control circuit that drives the exhaust valve 15 by outputting a drive signal of the exhaust valve 15 in accordance with an instruction signal from the CPU 20, and adjusts the opening degree of the exhaust valve 15.

  The signal processing unit 16 includes an amplifier 30, a pulse wave filter 31, a pressure filter 32, a 5 × amplifier 33, and an analog / digital (A / D) converter 34.

  The amplifier 30 amplifies the cuff pressure signal measured by the pressure sensor 13 and outputs the amplified cuff pressure signal to the pulse wave filter 31, the pressure filter 32, and the A / D converter 34, respectively.

  The pulse wave filter 31 is composed of a band pass filter (BPF) that passes only a frequency component for extracting a pulse wave from the amplified cuff pressure signal. Since the frequency component of the pulse wave is relatively low with respect to the cuff pressure signal, the order of the BPF may be low (first).

  The pressure filter 32 is an average filter (smooth filter) that averages or smoothes the cuff pressure signal to obtain a blood pressure value. Specifically, the pressure filter 32 includes a low-pass filter (LPF) that performs filtering to remove high-band noise from the amplified cuff pressure signal.

  The 5 × amplifier 33 amplifies the pulse wave component from the pulse wave filter 31 by a predetermined factor (here, 5 times) for emphasis display.

  The A / D converter 34 has a pulse wave component amplified five times by the five-time amplifier 33, a cuff pressure signal after filtration from the pressure filter 32, and a cuff pressure signal after amplification from the amplifier 30 (measurement raw data). Are A / D converted. The A / D converter 34 outputs the three types of signals after A / D conversion to the CPU 20 as cuff pressure data. The cuff pressure data indicates the waveform of the cuff pressure, and at the time of blood pressure measurement, a pulse wave component that is a signal component representing the pulse wave of the subject is superimposed on the waveform of the cuff pressure.

  The signal processing unit 16 according to the present embodiment (1) averages or smoothes the cuff pressure signal using the LPF which has been conventionally provided for the purpose of filtering to remove high-band noise from the amplified cuff pressure signal. Used as a pressure filter 32 for For this reason, it is preferable that the LPF has an average filter characteristic that averages the waveform of the cuff pressure in addition to high-band noise removal. Therefore, a pulse wave component or the like is not superimposed on the output of the pressure filter 32, and becomes a blood pressure component of blood pressure itself (described later with reference to FIG. 4). The pressure filter 32 preferably removes or separates a respiratory wave component that can be superimposed on the waveform of the cuff pressure similarly to the pulse wave component so as not to be mixed into the pulse wave component.

  (2) On the other hand, a pulse wave filter 31 is provided in parallel with the pressure filter 32, and a 5 × amplifier 33 is installed at the subsequent stage. The pulse wave filter 31 is a filter that allows only the pulse wave component, which is a signal component representing the pulse wave of the subject, to pass therethrough, contrary to the pressure filter 32 filtering the pulse wave component. In the measurement result display process by the CPU 20, the pulse wave superimposed on the blood pressure is highlighted and the filter output from the pressure filter 32 is amplified five times by the five-times amplifier 33. In addition, 5 times is an illustration, Other multiples may be sufficient and a multiple may be variable.

  (3) The above (1) and (2) are filter processing systems for displaying measurement results. For analysis, numerical display, and storage of measurement data, measurement data (measurement raw data) that is not subjected to filter processing is required. For this reason, a path for directly inputting the cuff pressure signal measured by the pressure sensor 13 before branching to the filter processing system to the A / D converter 34 is provided.

  As described above, the cuff pressure signal measured by the pressure sensor 13 is amplified by the amplifier 30, and then the path for extracting the pulse wave by the pulse wave filter 31 and the 5 × amplifier 33, and the path for extracting the blood pressure by the pressure filter 32. The signal is branched to the path directly input to the A / D converter 34 without passing through the filter processing system, and is input to the A / D converter 34. The A / D converter 34 performs A / D conversion of the signal of each path. The signal after A / D conversion is output to the CPU 20 as cuff pressure data.

  The pump 14, the pump driving unit 17, the exhaust valve 15, and the valve driving unit 18 constitute a pressure increasing / decreasing unit that increases and decreases the cuff pressure by supplying and exhausting air to and from the air bag of the cuff 10.

  The display unit 19 includes, for example, an LCD (Liquid Crystal Display) and each driver, and displays information on the screen according to an instruction signal from the CPU 19.

  The CPU 20 executes the program stored in the storage unit 22 to control the operation of each unit in the sphygmomanometer 1 and implements various functions as an acquisition unit, a detection unit, a determination unit, and the like in the sphygmomanometer 1. To do.

  The operation unit 21 has a push button (not shown) provided on a housing (not shown) of the sphygmomanometer 1 and generates an operation signal indicating that when the push button is pressed. It outputs to CPU20. The operation unit 21 includes, for example, a power-on button, a blood pressure measurement start button, and a blood pressure measurement stop button.

  The storage unit 22 is a semiconductor storage device such as a ROM, a RAM, and an EEPROM (electrically erasable programmable ROM) that is an electrically rewritable nonvolatile memory. The ROM stores software programs executed by the CPU 20 and fixed data. The RAM is used as a so-called working memory that temporarily stores data relating to blood pressure measurement, data used for calculation, calculation results, and the like. A part of the RAM is backed up by power or is made of an EEPROM, and the main unit power OFF stores data obtained by blood pressure measurement.

  Hereinafter, the operation of the sphygmomanometer 1 configured as described above will be described. Here, a case where blood pressure measurement is performed both during pressurization and during depressurization will be described as an example.

  FIG. 2 is a flowchart showing the blood pressure measurement operation of the sphygmomanometer 1, and this flow is executed by the CPU 20 at a predetermined timing. In the figure, S is each step of the flow.

  First, in step S1, the CPU 20 receives an operation signal generated by the operation unit 21 when the blood pressure measurement start button is pressed.

  In step S2, the CPU 20 outputs an instruction signal for completely closing the exhaust valve 15 to the valve drive unit 18 in accordance with the operation signal.

  In step S <b> 3, the CPU 20 outputs an instruction signal for starting driving of the pump 14 to the pump driving unit 17 to start the pump 14 and start supplying air to the cuff 10.

  In step S4, the CPU 20 starts the pressure sensor 13 and starts detecting the air pressure (that is, the cuff pressure) in the cuff 10 wound around the upper arm of the subject.

  In step S5, the CPU 20 performs measurement result display processing of primary blood pressure measurement (at the time of pressurization) in real time, outputs an instruction signal for displaying the measurement result on the screen, and displays the blood pressure measurement result in real time on the user. Or notify the subject. This measurement result display process will be described later with reference to FIG.

  In step S6, the CPU 20 determines whether or not the cuff pressure indicated in the cuff pressure data input from the signal processing unit 16 has reached a predetermined value.

  When the cuff pressure reaches the predetermined value, in step S7, the CPU 20 outputs an instruction signal for stopping the driving of the pump 14 to the pump driving unit 17, stops the pump 14, and stops the supply of air to the cuff 10. . If the cuff pressure has not reached the predetermined value, the process returns to step S5.

  In the present embodiment, the process shifts to the secondary blood pressure measurement (during pressure reduction) on the condition that the cuff pressure has reached a predetermined value. However, the cuff pressurization is stopped by acquiring the measurement value of the maximum blood pressure. It may be executed as a trigger.

  After completing the primary blood pressure measurement, the CPU 20 executes the secondary blood pressure measurement.

  In step S <b> 8, the CPU 20 adjusts the opening degree of the exhaust valve 15 to a value corresponding to a predetermined reduced pressure speed, and outputs an instruction signal for causing the exhaust valve 15 to be in a half-open state to the valve drive unit 18. To start.

  In step S <b> 9, the CPU 20 performs measurement result display processing for secondary blood pressure measurement (during decompression) in real time, and displays the measurement result on the screen of the display unit 19. This measurement result display process is the same as step S5 described above, and will be described later with reference to FIG.

  In step S10, after the measurement result display process is finished, the CPU 20 adjusts the opening degree of the exhaust valve 15 to a value corresponding to a predetermined high decompression speed and outputs an instruction signal to the valve drive unit 18 to fully open the exhaust valve 15. Then, the exhaust from the cuff 10 is accelerated, and the CPU 20 stops the operation of the pressure sensor 13 in step S11.

  The blood pressure measurement operation is performed as described above.

  FIG. 3 is a flowchart showing the measurement result display process of the sphygmomanometer 1, which is called and executed by a subroutine call in step S5 or step S9 in FIG.

  In step S <b> 21, the CPU 20 acquires cuff pressure data from the signal processing unit 16. The cuff pressure data indicates the waveform of the cuff pressure. However, the cuff pressure data input from the signal processing unit 16 is not one system, and signals divided into three systems by the signal processing unit 16 are input. . That is, the CPU 20 passes only the pulse wave component, which is a signal component representing the pulse wave of the subject, from the signal processing unit 16 by (1) the pulse wave filter 31, and the pulse wave component is The pulse wave component amplified twice, (2) The pulse wave component is removed and averaged by the pressure filter 32 and averaged to show the blood pressure itself, (3) Measurement data not subjected to filter processing (measurement raw data) Get each. Among these, the measurement data (measurement raw data) is stored in the storage unit 22 as basic data at the time of measurement that is not directly related to the measurement result display process. Measurement data (measurement raw data) is sequentially stored separately from measurement result display data, so that data loss due to unforeseen circumstances can be dealt with. In addition, data that is not subjected to filtering processing can be easily used when collating other biometric data such as an electrocardiogram.

  In step S22, the CPU 20 determines whether or not the acquired cuff pressure data is measurement data (measurement raw data). If it is measurement data (measurement raw data), the CPU 20 stores the data in the data storage area of the storage unit 22 in step S23 and returns to step S5 or step S9 in FIG. The data storage area is, for example, a power-backed-up RAM or EEPROM area.

  When the cuff pressure data acquired in step S22 is not measurement data (measurement raw data), the process proceeds to step S24.

  In step S24, the CPU 20 generates blood pressure measurement display data based on the acquired cuff pressure data (pulse wave component from the pulse wave filter 31, pressure data from the pressure filter 32). Specific examples of blood pressure measurement display data will be described later with reference to FIGS.

  In step S <b> 25, the CPU 20 creates a measurement result display screen (see FIGS. 4 to 6) based on the generated blood pressure measurement display data and screen display information stored in advance in the storage unit 22.

  In step S26, CPU20 displays the produced measurement result display screen on the display screen of the display part 19, and returns to step S5 or step S9 of FIG.

  The measurement result display operation is performed as described above.

  FIG. 4 is a diagram illustrating a display screen example of the measurement result of the display unit 19.

  As shown in FIG. 4, the measurement result display screen 100 includes a mercury column display 110 simulating a mercury column of a mercury sphygmomanometer, and a plurality of pulse wave amplitude graphs in which the magnitudes of measured pulse waves are arranged for each cuff pressure. 120, a current pressure value 130 that digitally represents the same value as the pressure value of the mercury column display 110, a heart mark 140 that indicates that blood pressure is being measured and contracts and expands in synchronization with the pulse, and a current pulse rate display 150 And the maximum / minimum (average) pressure value and pulse rate display 160 of the previous time and the previous time.

  The mercury column display 110 includes a pressure component display 111 indicating the current cuff pressure, a pulse wave component display 112 indicating the current pulse wave magnitude, and a mercury column scale 113. The scale 113 is a scale for displaying the cuff pressure value in a bar graph.

  Since the mercury column display 110 imitates the mercury column of a mercury sphygmomanometer, the mercury column display 110 is displayed as an upright bar graph that makes the mercury column image the left end portion of the measurement result display screen 100. Note that the bar graph display may be changed to a columnar shape instead of a bar graph, or a modification such as decoration may be added.

  On the right side of the mercury column display 110, a pulse wave amplitude graph 120 displaying a trace of the amplitude change of the pulse wave is displayed.

  Further, the measurement result display screen 100 has setting information of ID number 171, paper feed 172, and volume 173 in the upper part, and cuff attachment arms 174 a and 174 b, cuff pressure increase / decrease 175 a and 175 b, and deletion 176 in the lower part. , Display 177, record 178, and inspection switching 179 buttons. Each setting information and setting button can be set by key operation of the operation unit 21 (FIG. 1). Further, a part of the operation unit 21 may be a touch panel provided on the display unit 19, and in this case, each setting button including a soft key displayed on the display unit 19 is selected by touching.

  The sphygmomanometer 1 according to the present embodiment performs blood pressure measurement using an oscillometric method.

  In the blood pressure measurement method by the oscillometric method, air is sent to the cuff 10 and sufficiently pressurized. Thereafter, air is evacuated from the cuff 10, and the pressure in the cuff fluctuates slightly due to the pulse as the cuff internal pressure decreases. Hereinafter, this minute variation is referred to as a blood pressure component. In the sphygmomanometer 1 of FIG. 1, the blood pressure component is extracted by removing the pulse wave component and the like by the pressure filter 32 of the signal processing unit 16 and averaging. The CPU 20 acquires a value after A / D conversion of the pressure filter 32 as a blood pressure component. Further, this blood pressure component is displayed corresponding to the pressure component display 111 in the mercury column display 110 of the measurement result display screen 100 shown in FIG.

  On the other hand, the signal processing unit 16 extracts the pulse wave component of the subject using the pulse wave filter 31 and outputs the pulse wave component obtained by amplifying the pulse wave component five times by the five-time amplifier 33 to the CPU 20. The CPU 20 acquires the value after A / D conversion of the 5 × amplifier 33 as a pulse wave. Further, this pulse wave is displayed corresponding to the pulse wave component display 112 in the mercury column display 110 of the measurement result display screen 100 shown in FIG.

  The blood pressure component increases initially, then reaches a peak at average blood pressure, and then decreases. Blood pressure is measured from this trend. The blood pressure measurement operation has been described with reference to the flow of FIG.

  The sphygmomanometer 1 according to the present embodiment is not characterized in that the cuff pressure is displayed in a mercury column. In the mercury column display 110, a pressure component display 111 corresponding to the blood pressure component is displayed at the base of the bar graph display. The pulse wave component display 112 is displayed so as to be superimposed on the upper end of the pressure component display 111. During the measurement, the pressure component display 111 slightly fluctuates and displays the current cuff pressure as a bar graph, while the pulse wave component display 112 is placed on the upper part of the pressure component display 111 to show the current pulse wave magnitude. indicate. The pulse wave component display 112 is displayed according to the current pulse wave magnitude. The pulse wave displayed on the pulse wave component display 112 is displayed by multiplying the measured value by a predetermined value (here, 5 times) in order to improve visibility. The pulse wave component display 112 is displayed in a conspicuous color (for example, pink) different from the pressure component display 111.

  The signal processing unit 16 (FIG. 1) passes through the path for extracting the blood pressure component by the pressure filter 32, the path for extracting the pulse wave component by the pulse wave filter 31 and the 5-times amplifier 33, and the filtering process to pass measurement data (measurement raw data). ) In the signal output path in parallel. The signal processing unit 16 has a hardware configuration based on an electronic circuit and is not a program process. Due to the parallel processing and the hardware configuration, each signal (pulse vibration, width pulse wave component, measurement data) can be obtained without causing a delay. Therefore, the CPU 20 can display the blood pressure component on the pressure component display 111 and display the pulse wave component on the upper end of the pressure component display 111 in real time because there is no delay in each input signal.

  Further, due to the parallel processing and no delay, the pulse wave component display 112 is not affected by the signal processing delay of the pressure component display 111 and the like, and the behavior of the pulse wave component appears as it is. The pulse wave component display 112 changes from moment to moment. On the other hand, since the pressure component display 111 is a blood pressure component with respect to the cuff pressure, there is no extreme variation. In the mercury column display 110, the pulse wave component display 112 is placed on the upper end of the pressure component display 111. Therefore, the cuff pressure can be discriminated intuitively by the pressure component display 111 in the image of the mercury column. The presence of measurement can be evoked by the changing pulse wave component display 112. This can be expected to improve the reliability image of blood pressure measurement and, in turn, lead to enjoyment of blood pressure measurement.

  5A and 5B are diagrams for explaining the mercury column display 110 and the pulse wave amplitude graph 120. FIG. 5A shows a state during measurement, and FIG. 5B shows a state after the measurement is completed.

  The left side of FIG. 5A is a display example of the mercury column display 110 when the cuff pressure is 101 mmHg. The current pressure is indicated by a bar graph display of the pressure component display 111. Further, the pulse change at this time is indicated by a bar graph display of the pulse wave component display 112 placed on the upper end of the pressure component display 111. The pulse wave component (pulse wave component display 112) is enlarged about 5 times, and the color is changed and displayed on the pressure value (pressure component display 111).

  A state in which such a mercury column display 110 is viewed in the time axis direction is a waveform graph on the right side of FIG. Also in the pulse wave amplitude graph 120, as in the case of the mercury column display 110, the pulse wave component 122 is superimposed on the cuff pressure 121 being measured.

  FIG. 5B shows a state after the measurement, and the mercury column display 110 is not displayed. Looking at the waveform graph on the right side of FIG. 5B, the pulse wave component 122 is superimposed on the cuff pressure 121.

  Thus, by the display method of displaying the pulse wave component 122 on the cuff pressure 121 of the pulse wave amplitude graph 120 and the display method of displaying the pulse wave component display 112 on the pressure component display 111 of the mercury column display 110, Even minute changes in the pulse can be clearly seen.

  FIG. 6 is a diagram for explaining a display screen of the mercury column display 110.

  As described above, since the fluctuation component is different from the pressure component display 111, the pulse wave component display 112 is displayed at a variation timing different from the change behavior of the pressure component display 111. For example, as shown in FIG. 6, even if the cuff pressure on the pressure component display 111 does not change at 109 mmHg, the pulse wave component on the pulse wave component display 112 changes (including the pulse wave component including 0). That is, the pulse change at a certain time point is indicated by a bar graph display of the pulse wave component display 112 placed on the upper end of the pressure component display 111, so that even a minute change of the pulse can be clearly recognized.

  As described above, according to the present embodiment, the sphygmomanometer 1 includes the pulse wave filter 31 that extracts the pulse wave component, the 5-fold amplifier 33 that amplifies the pulse wave component, and the pressure filter 32 that extracts the blood pressure component. The CPU 20 includes a signal processing unit 16 configured, and the CPU 20 performs a measurement result display process to display the pressure component display 111 indicating the current cuff pressure on the measurement result display screen 100 of the display unit 19 and the current pulse wave. A mercury column display 110 including a pulse wave component display 112 indicating the magnitude and a scale 113 of the mercury column is displayed. In particular, the pressure component display 111 corresponding to the blood pressure component is displayed at the base of the mercury column display 110, and the pulse wave component display 112 corresponding to the pulse change is displayed in a different color at the upper end. This pulse wave component is amplified and displayed by being amplified by the 5 × amplifier 33. Further, on the right side of the mercury column display 110, a pulse wave amplitude graph 120 showing a trace of the amplitude change of the pulse wave is displayed. In addition, what is necessary is just to confirm the present pressure value 130 of the digital description displayed with the mercury column display 110 for the exact numerical value.

  Thereby, the pressure and the blood pressure component can be displayed at the same time, and the state during the blood pressure measurement can be intuitively presented instead of the blood pressure value. Hereinafter, the effect will be specifically described.

  In blood pressure measurement using the oscillometric method, when blood pressure measurement rises, the average blood pressure passes, the blood pressure component is sufficiently decreased, and pressurization is completed, and when blood pressure measurement is reduced, the pulse trend is accurately measured. It is necessary to confirm that.

  In the confirmation with the old mercury column, the pulse change is very small on the scale of the mercury column, so the minute change of the pulse is not known. Conventionally, there is a sphygmomanometer that displays a blood pressure component with a waveform or an indicator. However, since the current pressure and the blood pressure component are displayed separately, it is difficult to see and the image is difficult to grasp because the information is divided.

  The sphygmomanometer of the present embodiment can intuitively and clearly visually recognize the change in the pulse by the pulse wave component display 112 while checking the blood pressure by the pressure component display 111 of the mercury column display 110. In addition to the above effects, the following effects can be expected in the present embodiment.

  (1) It is easy to be familiar with the analog bar graph display form similar to the mercury column type sphygmomanometer that has been used in medical facilities for a long time, and the reliability of the measured value is high.

  (2) Since the change in the pulse is enlarged and displayed on the top of the pseudo mercury column display, it is easy to grasp that there is an arrhythmia.

  (3) Since the portion that changes in the pulse at the top of the pseudo mercury column display has a different color from the pseudo mercury column at the bottom, it can be easily distinguished.

  (4) The size of the pulse can be determined by the magnitude of the fluctuation of the pulse at the top of the pseudo mercury column display, and the reliability of the measured value can also be intuitively understood from the size of the pulse.

  (5) Since the approximate blood pressure value is predicted from the overall height of the pseudo mercury column display, it is easy to determine this error when the automatic measurement value by the machine is largely incorrect.

  (6) It is easy to discriminate the pulse even for women with small pulse touches or obese people.

  The embodiment of the present invention has been described above. The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this. That is, the description of the configuration of the apparatus and the operation at the time of use is an example, and it is obvious that various modifications and additions to these examples are possible within the scope of the present invention.

  For example, in the present embodiment, the above-described blood pressure measurement method is realized in a sphygmomanometer, but may be realized in other medical devices such as an arteriosclerosis measuring device.

  In the present embodiment, the name “blood pressure monitor” is used. However, this is for convenience of explanation, and of course, an automatic blood pressure monitor, an electronic blood pressure monitor, or the like may be used.

  Furthermore, any part of the sphygmomanometer, for example, the filter type, number and connection method of the signal processing unit may be used.

The block diagram which shows the structure of the blood pressure meter which concerns on one embodiment of this invention The flowchart which shows the blood-pressure measurement operation | movement of the blood pressure meter which concerns on one embodiment of this invention The flowchart which shows the measurement result display process of the sphygmomanometer which concerns on one embodiment of this invention The figure which shows the example of a display screen of the measurement result of the display part of the blood pressure meter which concerns on one embodiment of this invention The figure explaining the mercury column display and pulse wave amplitude graph of the sphygmomanometer according to one embodiment of the present invention The figure explaining the display screen of mercury column display of the sphygmomanometer concerning one embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sphygmomanometer 10 Cuff 13 Pressure sensor 14 Pump 15 Exhaust valve 16 Signal processing part 17 Pump drive part 18 Valve drive part 19 Display part 20 CPU
21 Operation Unit 22 Storage Unit 30 Amplifier 31 Pulse Wave Filter 32 Pressure Filter 33 5x Amplifier 34 A / D Converter

Claims (9)

A measuring means for measuring cuff pressure data using the cuff;
An extracting means for extracting a blood pressure component and a pulse wave component based on the measured cuff pressure data;
Generating means for generating measurement display data for associating the extracted blood pressure component with the pulse wave component and displaying the blood pressure component and the pulse wave component in a visually recognizable manner;
Display means for displaying the generated measurement display data on the screen;
A sphygmomanometer, comprising:   The sphygmomanometer according to claim 1, wherein the generation unit generates measurement display data for displaying the blood pressure component and the pulse wave component in a bar graph format.   The sphygmomanometer according to claim 1, wherein the generation unit generates measurement display data for displaying the blood pressure component and the pulse wave component in a manner similar to a mercury column.   The sphygmomanometer according to claim 1, wherein the extraction unit is a signal processing unit that extracts the pulse wave component using a first filter.   The sphygmomanometer according to claim 4, wherein the extraction unit is a signal processing unit that extracts the blood pressure component by a second filter provided in parallel with the first filter.   The sphygmomanometer according to claim 1, wherein the display unit displays the measurement display data on the screen in real time.   The sphygmomanometer according to claim 1, wherein the display means displays the measurement display data on the screen as a trend.   The sphygmomanometer according to claim 1, further comprising amplification means for amplifying the extracted pulse wave component by a predetermined factor.   The sphygmomanometer according to claim 1, further comprising a control unit that stores the measured cuff pressure data in a storage unit without passing through the extraction unit.

Images