JP2009189619A - Blood pressure measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood pressure measuring device appropriately adjusting a time. <P>SOLUTION: A sphygmomanometer stores a measurement result and measurement date/hour associated with each other, and a time zone storing no measurement result, namely, the time zone non-using the sphygmomanometer is set to a timing of a time adjustment. The sphygmomanometer has a radio controlled clock function, when a present time counted by the clock function is the timing (YES in S401), acquires a time signal from the radio controlled clock function (S403 and S405), when the date/time of the acquired time signal is later than the measurement date/time of the stored latest measurement result (NO in S407), adjusts it to the measurement time (S409). When the date/time of the acquired time signal is before the measurement time/date of the latest measurement result (YES in S407), the sphygmomanometer executes no time adjustment. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a blood pressure measurement device, and more particularly to a blood pressure measurement device having a function of adjusting time.

  Blood pressure is one index for analyzing cardiovascular diseases. Performing risk analysis based on blood pressure is effective in preventing cardiovascular diseases such as stroke, heart failure and myocardial infarction. In particular, early morning hypertension, in which blood pressure rises in the early morning, is related to heart disease and stroke. Furthermore, it has been found that, among early morning hypertension, a symptom in which blood pressure suddenly rises between 1 hour and 1.5 hours after waking up, called morning surge, has a causal relationship with stroke.

  Thus, grasping the correlation between time (lifestyle) and blood pressure change is useful for risk analysis of cardiovascular diseases. Therefore, it is necessary to measure blood pressure continuously over a long period of time. In view of the above-mentioned necessity, the applicant of the present invention has a function of performing a risk analysis from the relationship between the date and time and the blood pressure value by first having a clock mechanism inside and recording the measured date and blood pressure value in association with each other. An on-board blood pressure monitor was invented and disclosed in Japanese Patent Application Laid-Open No. 2004-261452 (hereinafter referred to as Patent Document 1). However, due to the accuracy of the timepiece mechanism, the time may gradually go wrong during use.

Therefore, Japanese Patent Laid-Open No. 2005-224440 (hereinafter referred to as Patent Document 2) is equipped with a radio clock as a clock adjustment mechanism of a sphygmomanometer, and a mechanism for automatically adjusting the clock by receiving radio waves at standard time. A blood pressure monitor is disclosed. The purpose of the techniques disclosed in these documents is to eliminate the need to adjust the timepiece before use by mounting a radio timepiece.
Japanese Patent Laid-Open No. 2004-261442 JP 2005-224440 A

  However, the electronic sphygmomanometer disclosed in Patent Document 1 needs to manually set a clock before the user uses the sphygmomanometer. For this reason, there is a possibility that the risk analysis cannot be performed correctly if the measurement is performed with a wrong clock setting. It is also possible to intentionally change clock settings and manipulate risk analysis results.

  The radio timepiece mounted on the sphygmomanometer disclosed in Patent Document 2 is basically configured to receive and analyze a standard time radio wave and adjust the timepiece according to the information. Therefore, in order to always keep the time accurately, it is necessary to make adjustments at a pace of several times a day, for example, once an hour. Here, if it is a normal timepiece, there is no problem even if it is adjusted at any time during the day. However, attention should be paid to the timing of the time adjustment of the sphygmomanometer. Because the trend of blood pressure values by date (trends over time) is also important data for risk analysis, for example, when measuring multiple times, the time is adjusted between measurements This is because if the measurement context changes, it cannot be used as trend data.

  The present invention has been made in view of such a problem, and an object thereof is to provide a blood pressure measurement device capable of appropriately performing time adjustment in a blood pressure measurement device having a clock function.

  In order to achieve the above object, according to one aspect of the present invention, a blood pressure measurement device includes a blood pressure measurement unit that measures blood pressure, a time measurement unit that measures the current time, a measurement result obtained by the blood pressure measurement unit, and a time measurement unit. Storage means for associating and storing measurement time information indicating the measurement time obtained from, and an adjustment means for adjusting the current time measured by the time measurement means to be set time, the adjustment means is set time and Judgment means for judging whether or not to perform the adjustment is included based on the relationship with the measurement time information associated with the measurement result stored in the storage means.

  Preferably, the determination unit performs the adjustment when the setting time is later than the measurement time indicated by the measurement time information associated with the latest measurement result among the measurement results stored in the storage device. If it is earlier than the measurement time indicated by the measurement time information, it is determined that the adjustment is not performed.

  Preferably, the determination means is based on a measurement time distribution obtained from the measurement time information associated with the measurement results stored in the storage means, but the measurement results stored in the storage means are more than a predetermined number. It is determined that the above-mentioned adjustment is performed when the time is less.

  More preferably, the determination means determines that the adjustment is performed when the set time is in a predetermined time zone.

  Preferably, the determination unit determines that the adjustment is performed when the number of measurement results stored in the storage unit is equal to or less than a predetermined number.

  Preferably, the blood pressure measurement device further includes a receiving unit that receives a standard radio wave and an acquisition unit that acquires a set time based on a time signal obtained from the standard radio wave.

  ADVANTAGE OF THE INVENTION According to this invention, when performing time adjustment in the blood-pressure measuring device provided with the timepiece function, it can prevent changing the trend of the recorded blood pressure value carelessly or intentionally. Therefore, it is possible to ensure the reliability of diagnosis based on the blood pressure value trend.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same.

  FIG. 1 is a schematic diagram of an external appearance of a blood pressure measurement device (hereinafter referred to as a sphygmomanometer) 1 according to an embodiment of the present invention.

  Referring to FIG. 1, a sphygmomanometer 1 includes a main body 2 and a cuff 5 wound around an upper arm that is a measurement site, and these are connected by an air tube 10. On the front surface of the main body 2, an operation unit 3 such as a switch and a display unit 4 for displaying measurement results and the like are arranged.

  The operation unit 3 includes a power switch 31 for instructing power ON / OFF, a measurement switch 32 for instructing start of measurement, a stop switch 33 for instructing stop of measurement, and a recorded measurement. A record recall switch 34 for recalling and displaying values is included.

  An air bag 13 (see FIG. 2) is disposed on the cuff 5, and the air bag 13 is pressed against the measurement site by winding the cuff 5 around the upper arm, which is the measurement site.

FIG. 2 is a block diagram illustrating a specific example of the hardware configuration of the sphygmomanometer 1.
Referring to FIG. 2, sphygmomanometer 1 includes a main body 2 and a cuff 5 wound around an upper arm that is a measurement site, and these are connected by an air tube 10. On the front surface of the main body 2, an operation unit 3 including switches 31 to 34 and a display unit 4 for displaying measurement results and the like are arranged. An air bag 13 is disposed on the cuff 5, and the air bag 13 is pressed against the measurement site by winding the cuff 5 around the upper arm that is the measurement site.

  The air bag 13 is connected to a pressure sensor 23 that measures a change in internal pressure of the air bag 13, a pump 21 that supplies and exhausts air to the air bag 13, and a valve 22. The pressure sensor 23, the pump 21, and the valve 22 are connected to an oscillation circuit 28, a pump drive circuit 26, and a valve drive circuit 27, respectively. Further, the oscillation circuit 28, the pump drive circuit 26, and the valve drive circuit 27 are Each is connected to a CPU (Central Processing Unit) 40 that controls the entire sphygmomanometer 1.

  The CPU 40 further includes a display unit 4, an operation unit 3, a memory 6 that stores a program executed by the CPU 40 and serves as a work area when executing the program, and a memory 7 that stores measurement results and the like. A clock 52, a power source 53, and a radio clock 54 are connected.

  The CPU 40 is driven by receiving power supply from the power supply 53. The CPU 40 executes a predetermined program stored in the memory 6 based on the operation signal input from the operation unit 3, and outputs a control signal to the pump drive circuit 26 and the valve drive circuit 27. The pump drive circuit 26 and the valve drive circuit 27 drive the pump 21 and the valve 22 according to the control signal. The pump 21 is driven by a pump drive circuit 26 in accordance with a control signal from the CPU 40 and injects air into the air bladder 13. The valve 22 is controlled to be opened and closed by a valve drive circuit 27 according to a control signal from the CPU 40, and the air in the air bladder 13 is discharged.

  The pressure sensor 23 is a capacitance type pressure sensor, and its capacitance value changes due to a change in the internal pressure of the air bladder 13. The oscillation circuit 28 is converted into a signal having an oscillation frequency corresponding to the capacitance value of the pressure sensor 23 and input to the CPU 40. The CPU 40 executes a predetermined process based on the change in the internal pressure of the air bladder 13 obtained from the pressure sensor 23, and outputs the control signal to the pump drive circuit 26 and the valve drive circuit 27 according to the result. Further, the CPU 40 calculates a blood pressure value based on the change in the internal pressure of the air bladder 13 obtained from the pressure sensor 23, performs a process for displaying the measurement result on the display unit 4, and displays data and a control signal. Are output to the display unit 4. Further, the CPU 40 performs a process for storing the blood pressure value in the memory 7. At that time, the CPU 40 acquires time information from the clock 52 as necessary. In addition, a control signal is output to the timepiece 52 to adjust the time as appropriate.

  The clock 52 manages the current date and time, for example, by counting the passage of time from a predetermined timing, and inputs the information to the CPU 40.

  The radio timepiece 54 includes a receiver having an antenna and a microprocessor. A standard radio wave including time information is received by a receiver, a time signal is obtained by analyzing the standard radio wave by a microprocessor, and the time signal is input to the CPU 40. Based on the time signal input from the radio timepiece 54, the CPU 40 outputs a control signal for adjusting the time of the timepiece 52 to the timepiece 52 at a predetermined timing. The clock 52 adjusts the time according to the control signal.

  FIG. 3 is a flowchart showing a specific example of processing executed at a timing when power is supplied from the power source 53 to the CPU 40 when the power switch 31 is operated in the sphygmomanometer 1. The processing shown in the flowchart of FIG. 3 is realized by the CPU 40 executing a predetermined program stored in the memory 6.

  Referring to FIG. 3, when the power is turned on, first, in step S101, CPU 40 initializes a working area of memory 6 and adjusts 0 mmHg of pressure sensor 23, etc. Is done.

  When the CPU 40 monitors the input of the operation signal from the operation unit 3 and detects that the measurement switch 32 is pressed (YES in step S105), the CPU 40 executes the blood pressure measurement process in step S107, and the result is displayed in step S109. Processing for displaying on the display unit 4 is executed and displayed on the display unit 4. In step S111, the CPU 40 writes the measurement result in a predetermined area of the memory 7 in association with the date / time information at the time of measurement.

  The blood pressure measurement process in step S107 can employ a general measurement process, and is not limited to a specific processing method in the present invention. As an example, referring to FIG. 4, first, air bag 13 is pressurized to a set pressure in accordance with a control signal from CPU 40 (step S201). When the internal pressure of the air bag 13 reaches the set pressure (YES in step S203), the air bag 13 is gradually depressurized by the valve 22 in accordance with a control signal from the CPU 40 (step S205). CPU40 extracts the vibration component accompanying the volume change of the artery superimposed on the internal pressure of the air bag 13 obtained during pressure reduction, calculates blood pressure by predetermined calculation (step S207), and determines blood pressure (step S209). After the blood pressure is calculated, the valve 22 is opened according to the control signal from the CPU 40, and the air in the air bag 13 is exhausted (step S211).

  In order to maintain the accuracy of date and time management in the clock 52, the CPU 40 adjusts the time of the clock 52 based on the time signal from the radio clock 54 at regular intervals, for example, once an hour or once a day. Needs to be done. The CPU 40 of the sphygmomanometer 1 adjusts the time when the electronic sphygmomanometer is used for the first time, or when the sphygmomanometer 1 is reset without being turned on for a long period of time, and when the sphygmomanometer 1 is turned on. Otherwise, the CPU 40 performs and sets processing for setting the timing of time adjustment, and performs time adjustment when the current time becomes the above timing.

  FIG. 5 is a flowchart illustrating a specific example of processing for setting the timing of time adjustment in the sphygmomanometer 1. The process shown in the flowchart of FIG. 5 may be performed at a predetermined time interval, or may be performed after a series of processes shown in FIG. The processing shown in the flowchart of FIG. 5 is also realized by the CPU 40 executing a predetermined program stored in the memory 6.

  Referring to FIG. 5, in step S <b> 301, the CPU 7 checks the memory 7 to check whether or not the measurement result is recorded in a predetermined area of the memory 7. As a result, if the measurement result is recorded (YES in step S301), the CPU 40 scans all the measurement results in step S303 to update the distribution of the measurement time, and the time zone in which the measurement results are not recorded in step S305. That is, the time zone when the sphygmomanometer 1 is not used is extracted. For example, assuming that the distribution of measurement times is obtained in step S303 as shown in FIG. 6, in step S305, the time zone of 12:00 to 18:00, which is the time zone T1 of FIG. And 22:00 to 4:00 are extracted. Note that the processing in steps S303 and S305 may be performed using all the measurement results recorded in the predetermined area of the memory 7 as described above, or may be performed from the current date and time when the processing is performed. You may perform using the measurement result in time, ie, the several recent measurement result.

  As a result of the processing in steps S303 and S305, when a plurality of time zones are extracted as time zones when the sphygmomanometer 1 is not used (YES in step S307), the CPU 40 performs step S309 at night. The closest time zone is set as the time adjustment timing. In the example of FIG. 6, since the above-described time zone T1 and time zone T2 are extracted, the time zone T2, which is the time zone closest to the night, is set as the time adjustment timing.

  Otherwise, that is, when one time zone is extracted (NO in step S307), the CPU 40 sets the extracted time zone as the time adjustment timing in step S311. For example, when only the time zone T1 in FIG. 6 is extracted, the time zone T1 is set as the time adjustment timing.

  If it is determined in step S301 that no measurement result is recorded in the predetermined area of the memory 7 (NO in step S301), the CPU 40 sets the night time zone as the time adjustment timing in step S313. As the “night time zone”, for example, as shown in FIG. 6 as the time zone T2, a time zone of 22:00 to 4:00 is mentioned, and this time zone is stored in advance in the memory 6 or the like. It may be stored.

  In the above example, the process branches to step S303 and step S313 depending on whether or not the measurement result is recorded in the predetermined area of the memory 7 in step S301. However, in step S301, the memory 7 Whether or not a predetermined number of measurement results are recorded in a predetermined area, whether or not measurement results are recorded within a predetermined time from the current date and time when the processing is being performed, and the processing is being performed The process may be branched depending on whether or not a predetermined number of measurement results are recorded within a predetermined time from the current date and time.

  FIG. 7 is a flowchart showing a specific example of the time adjustment process performed in the sphygmomanometer 1. The processing shown in the flowchart of FIG. 7 is preferably performed at predetermined time intervals. The processing shown in the flowchart of FIG. 7 is also realized by the CPU 40 executing a predetermined program stored in the memory 6.

  Referring to FIG. 7, CPU 40 checks whether or not the current time is the time adjustment timing set in the above-described process at predetermined time intervals. Then, if it is detected (YES in step S401), the CPU 40 starts acquiring the time signal from the radio timepiece 54 in step S403. In step S <b> 403, the CPU 40 may start inputting a time signal based on the standard radio wave received by the radio timepiece 54 from the radio timepiece 54 at regular time intervals. A control signal for receiving a standard radio wave may be output and input of a time signal corresponding to the control signal may be started. When reception of the time signal is completed (YES in step S405), the CPU 40 in step S407, the date / time information T indicated by the received time signal and the measurement date / time of the latest measurement result recorded in the predetermined area of the memory 7 The information t is compared. As a result, when the CPU 40 determines that the date / time information T indicates the date / time before the measurement date / time information t, that is, the date / time information T indicates the past than the measurement date / time information t (YES in step S407). ), The time adjustment in step S409 is not performed, and the process ends. In this case, it is preferable to output a message indicating that the time adjustment of the clock 52 is impossible from the display unit 4 or the like.

  If not, that is, if it is determined that the date and time information T indicates later than the measurement date and time information t (NO in step S407), the CPU 40 is based on the time signal input from the radio clock 54 in step S409. Then, a control signal for adjusting the time of the clock 52 is output to the clock 52 so that the date and time information indicated by the time signal is the current date and time, and the time is adjusted.

  By performing the above time adjustment processing in the sphygmomanometer 1, the power has already been turned on and the clock 52 has been adjusted in the past, but the blood pressure measurement has not been performed once, or the measurement result is stored in the memory. In the case where all are deleted from 7, the time is adjusted at night when the sphygmomanometer 1 is generally assumed not to be used. Alternatively, when there are fewer measurement results than the predetermined number, or when blood pressure measurement has not been performed for a predetermined period before the current time, the time can be adjusted at night. If blood pressure results are recorded, a measurement time distribution is created from the recorded measurement time, and the time zone where the sphygmomanometer is not used is extracted from the distribution and adjusted to that time zone. Is done. For this reason, for example, when blood pressure measurement is continuously performed a plurality of times, there is no situation where the time relationship between the measurements is changed and the context of the measurement results is switched. The trend of the measurement result recorded in the memory 7 is accurately maintained.

  Furthermore, when the time adjustment process described above is performed in the sphygmomanometer 1, the time adjustment of the clock 52 is not performed when the adjusted date and time is earlier than the measurement date and time of the latest measurement result recorded. . Therefore, the trend of the measurement result recorded in the memory 7 can be reliably held.

  The above specific example is an example in which the sphygmomanometer 1 includes a radio clock 54 and adjusts the time of the clock 52 based on a time signal from the radio clock 54 as shown in FIG. . However, the above-described processing can also be performed by a sphygmomanometer configured to receive a time adjustment instruction of the clock 52 with a normal operation button (not shown) of the operation unit 3. That is, when the sphygmomanometer 1 does not include the radio clock 54 and the CPU 40 adjusts the time of the clock 52 based on the operation signal from the operation unit 3, or the operation unit 3 instead of the time signal from the radio clock 54. Similarly, when the CPU 40 adjusts the time of the timepiece 52 based on the operation signal from, the time of the timepiece 52 can be adjusted in the same manner. In this case, similarly to step S407, the CPU 40 specifies the received input date / time information T based on the operation signal from the operation unit 3, and inputs the input date / time information T to a predetermined area of the memory 7. The measurement date / time information t of the latest recorded measurement result is compared. As a result, when the CPU 40 determines that the date / time information T indicates the date / time prior to the measurement date / time information t, that is, the date / time information T indicates the past than the measurement date / time information t, the CPU 40 Do not adjust the time. If not, that is, if it is determined that the date / time information T indicates later than the measurement date / time information t, the CPU 40 inputs the date / time information T, that is, input from the operation signal from the operation unit 3. A control signal for adjusting the time of the clock 52 so that the date and time information T is the current date is output to the clock 52 to adjust the time.

  When the above-described processing is performed in the sphygmomanometer 1, the sphygmomanometer 1 does not include the radio clock 54 and the CPU 40 adjusts the time of the clock 52 based on the operation signal from the operation unit 3, or the radio wave Even when the CPU 40 adjusts the time of the clock 52 based on the operation signal from the operation unit 3 instead of the time signal from the clock 54, the measurement date and time of the latest measurement result in which the adjusted date and time is recorded. In the case of the past, the time adjustment of the clock 52 is not performed. Therefore, the trend of the measurement result recorded in the memory 7 can be reliably held.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a schematic diagram of an external appearance of a blood pressure measurement device (hereinafter referred to as a sphygmomanometer) according to an embodiment of the invention. It is a block diagram which shows the specific example of the hardware constitutions of the blood pressure meter concerning embodiment. It is a flowchart which shows the specific example of the process performed by the blood pressure meter concerning embodiment at the timing when electric power was supplied. It is a flowchart which shows the specific example of a blood-pressure measurement process among the processes of FIG. It is a flowchart which shows the specific example of the process for setting the timing of time adjustment in the sphygmomanometer concerning embodiment. It is a figure which shows the specific example of distribution of measurement time. It is a flowchart which shows the specific example of the process of time adjustment in the sphygmomanometer concerning embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Blood pressure monitor, 2 main body, 3 operation part, 31-34 switch, 4 display part, 5 cuff, 6,7 memory, 10 air pipe, 13 air bag, 21 pump, 22 valve, 23 pressure sensor, 26 pump drive circuit , 27 Valve drive circuit, 28 Oscillator circuit, 40 CPU, 52 clock, 53 power supply, 54 radio wave clock.

Claims (6)

Blood pressure measuring means for measuring blood pressure;
A time measuring means for measuring the current time;
Storage means for storing the measurement result in the blood pressure measurement means in association with the measurement time information indicating the measurement time obtained from the time measurement means;
Adjusting means for adjusting the current time measured by the time measuring means to be set time;
The adjustment unit includes a determination unit that determines whether to perform the adjustment based on a relationship between the setting time and the measurement time information associated with the measurement result stored in the storage unit. Blood pressure measurement device.   The determination means performs the adjustment when the setting time is later than the measurement time indicated by the measurement time information associated with the latest measurement result among the measurement results stored in the storage means. The blood pressure measurement device according to claim 1, wherein the blood pressure measurement device determines that the adjustment is not performed when it is earlier than the measurement time indicated by the measurement time information.   The determination means is based on the measurement time distribution obtained from the measurement time information associated with the measurement result stored in the storage means, and the setting time is stored in the storage means. The blood pressure measurement device according to claim 1, wherein the adjustment is determined to be performed when the time is less than a predetermined number.   The blood pressure measurement device according to claim 3, wherein the determination unit determines to perform the adjustment when the setting time is in a predetermined time zone.   The blood pressure measurement device according to claim 1, wherein the determination unit determines to perform the adjustment when the measurement results stored in the storage unit are equal to or less than a predetermined number. A receiving means for receiving a standard radio wave;
The blood pressure measurement device according to claim 1, further comprising an acquisition unit that acquires the set time based on a time signal obtained from the standard radio wave.

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