JP2010035804A - Electronic sphygmomanometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate variation in time necessary for blood pressure measurement due to the peripheral length of a measurement part. <P>SOLUTION: An arm circumference estimation portion 116 estimates the arm circumference of a subject to be measured by the time necessary for pressurization of an air sack for fixation in blood pressure measurement and a residual pressure determination portion 114 determines the residual pressure corresponding to the estimated arm peripheral length. At the end of blood pressure measurement, the pressure in the air sack for fixation is adjusted by a second pressure adjustment portion 112 so that the pressure corresponding to the residual pressure may remain. In this way, wrapping and fixing of an air sack for measurement can be started with the air sack for fixation being blown up to some extent for subsequent blood measurements. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic sphygmomanometer that winds and attaches an air bag around a measurement site of a living body to measure blood pressure, and more particularly to an electronic sphygmomanometer that performs control according to the circumference of the measurement site to be wound.

It is desirable that the size of the air bag for blood pressure measurement is optimized for each person to be measured in order to perform accurate blood pressure measurement. Regarding this optimization, in the sphygmomanometer of Patent Document 1, it is determined whether the cuff is an appropriate size with respect to the length of the arm circumference of the patient, and when it is determined that the cuff size is not appropriate, the cuff is replaced. A message is output so that
JP 2007-130319 A

  In Patent Document 1, it is necessary to manually exchange the cuff, and the operation is troublesome. Therefore, a sphygmomanometer is provided that wraps an air bag around a measurement site, for example, an arm in a fully automatic manner regardless of the length of the arm circumference without requiring replacement of the cuff.

  In such a sphygmomanometer, in order to realize the automatic wrapping function, another air bag for wrapping the air bag around the measurement site and mounting and fixing the air bag is arranged outside the air pressure measurement air bag. The By pressurizing the winding air bag, the measurement air bag can be automatically wound around the measurement site. The size of the air bag for blood pressure measurement is determined based on the maximum arm circumference in order to correspond to the length of every arm circumference. Therefore, the person to be measured with a short arm circumference takes a longer time to start pressurizing the wrapping air bag and wrap the measurement air bag around the measurement site as compared with a measurer with a long arm circumference. Time was required, and as a result, it took a long time to complete the blood pressure measurement. Further, since the time for pressurizing the winding air bag is long, the time for driving the pump for pressurization is lengthened, and the battery life is also shortened.

  Therefore, an object of the present invention is to provide an electronic sphygmomanometer that eliminates variations in time required for blood pressure measurement due to the circumference of the measurement site.

  According to one aspect of the present invention, an electronic sphygmomanometer includes a blood pressure measurement bag that expands when a fluid is supplied, and a measurement bag that is supplied and inflated during blood pressure measurement to the measurement site of the subject. An electronic sphygmomanometer comprising a fixing bag for winding and fixing, wherein the blood pressure is calculated based on the pressure in the measurement bag by winding a measurement bag that is supplied with fluid and inflated around the measurement site Calculation means, residual pressure determining means for determining the residual pressure to be left as the internal pressure of the fixing bag, and adjusting the internal pressure of the fixing bag so as to be the determined residual pressure after the blood pressure measurement is finished, and adjusting Pressure adjusting means for holding the subsequent residual pressure until the next start of blood pressure measurement, and the residual pressure determining means applies the internal pressure after discharging the fluid from the fixing bag to the predetermined pressure during blood pressure measurement. Time measuring means for measuring the time required for pressure and a time measuring hand There based on time measured includes a perimeter estimating means for estimating the circumferential length of the measurement site, depending on the circumferential length of the estimated circumferential length estimating means determines the residual pressure.

  Preferably, the electronic sphygmomanometer further includes identification means for identifying a person who performs blood pressure measurement using the electronic sphygmomanometer, and a residual for storing the determined residual pressure in association with each identified person to be measured. Pressure storage means.

  Preferably, at the start of blood pressure measurement, the residual pressure held in the fixing bag is adjusted to be the residual pressure read for each person to be measured read from the residual pressure storage means.

  Preferably, the predetermined pressure refers to a pressure level for wrapping and fixing a measurement air bag around a measurement site for blood pressure measurement.

  Preferably, the electronic sphygmomanometer includes a table preliminarily storing a time required to pressurize to a predetermined pressure, a perimeter corresponding to the time, and a residual pressure corresponding to the perimeter, and a perimeter estimation means Searches the table based on the time measured by the time measuring means during blood pressure measurement and reads the corresponding perimeter, and the residual pressure determining means searches the table based on the read perimeter and reads the corresponding residual pressure.

  According to the present invention, the arm circumference of the person to be measured is estimated from the time required to pressurize the fixing bag at the time of blood pressure measurement, and the pressure corresponding to the arm circumference is left inside the fixing bag at the end of the measurement. In the subsequent blood pressure measurement, the wrapping and fixing of the measurement bag can be started from a state where the fixing bag is inflated to some extent, and there is no difference in measurement time depending on the arm circumference.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts, and description thereof will not be repeated.

FIG. 1 and FIG. 2 schematically show the appearance and use state of an electronic sphygmomanometer.
Referring to FIG. 1, an electronic sphygmomanometer 1 includes a fixing cylindrical case 5 and a sphygmomanometer body 2 for fixing an upper arm that is a measurement site of a subject. The sphygmomanometer main body 2 has an LCD (Liquid Crystal Display) 4 as a display 40 described later. The sphygmomanometer body 2 includes a power switch 41A, a start switch 41B and a stop switch 41C for instructing start and stop of blood pressure measurement, and a person to be measured (user ) Have a plurality of user ID switches 41D and guest switches 3 operated. The user ID switch 41D is operated to uniquely identify a plurality of users who commonly use the electronic sphygmomanometer 1. The guest switch 3 is operated by a user as a guest who cannot be identified by operating the user ID switch 41D.

  The outer peripheral surface of the fixing cylindrical case 5 is covered with a housing 6 made of a resin material. The inner peripheral surface 7 of the housing 6 has a blood pressure measurement air bag attached to the measurement site. FIG. 2 shows a state where the upper arm 100 that is the measurement site of the measurement subject is inserted from the front side of the drawing of the fixing cylindrical case 5 in order to measure blood pressure.

  FIG. 2 schematically shows a cross section of the fixing cylindrical case 5 in the state of FIG. The fixing cylindrical case 5 includes a measuring air bag 50, a compression / fixing curler 56 whose diameter can be expanded and contracted from the outer periphery of the upper arm 100, which is a measurement site, toward the inner peripheral surface of the fixing cylindrical case 5. A fixing air bladder 51 for fixing the measurement air bladder 50 to the measurement site by compression is provided. When the air is gradually supplied by the pressure fixing air system 54 and the fixing air bladder 51 is inflated, the diameter of the pressure fixing curler 56 is reduced by its action, and accordingly, the pressure fixing curler 56 and the human body (upper arm 100) ) Is pressed against the measurement site. As a result, the measurement air bladder 50 is wound around the human body (upper arm 100) by the compression / fixing curler 56 and the fixing air bladder 51, and the blood pressure can be measured.

  Referring to FIG. 3, an electronic sphygmomanometer 1 includes a measurement air bag 50, a fixing air bag 51, a blood pressure measurement air system 52 for supplying or discharging air to / from the measurement air bag 50 via a tube 53, An amplifier 35, a pump drive circuit 36, a valve drive circuit 37, and an A / D (Analog / Digital) converter 38 provided in association with the blood pressure measurement air system 52 are provided. Further, the electronic sphygmomanometer 1 includes a compression / fixing air system 54 for supplying or discharging air to / from the fixing air bag 51 via a tube 55, an amplifier 45 provided in association with the compression / fixing air system 54, and a pump drive. A circuit 46, a valve drive circuit 47, and an A / D (Analog / Digital) converter 48 are provided. The electronic sphygmomanometer 1 further includes a CPU (Central Processing Unit) 30 for centrally controlling and monitoring each unit, a program for causing the CPU 30 to perform a predetermined operation, and various types of information such as measured blood pressure values. 39, a display 40 for displaying various information including blood pressure measurement results, an operation unit 41 operated to input various instructions for measurement, and a timer 42 for measuring time and outputting time-measured data Prepare.

  Referring to FIG. 4, the blood pressure measurement air system 52 detects the pressure in the measurement air bladder 50 (hereinafter referred to as cuff pressure Pc) and supplies air to the measurement air bladder 50. And a valve 34 that is opened and closed to exhaust or seal the air in the measurement bladder 50. The amplifier 35 amplifies the output signal of the pressure sensor 32 and provides it to the A / D converter 38. The A / D converter 38 converts the applied analog signal into a digital signal and outputs it to the CPU 30. The pump drive circuit 36 controls the drive of the pump 33 based on a control signal given from the CPU 30. The valve drive circuit 37 performs opening / closing control of the valve 34 based on a control signal supplied from the CPU 30.

  The compression / fixing air system 54 includes a pressure sensor 42 for detecting and outputting the pressure in the fixing air bag 51, a pump 43 for supplying air to the fixing air bag 51, and a fixing air bag 51. It has a valve 44 that is opened and closed to exhaust or enclose air. The amplifier 45 amplifies the output signal of the pressure sensor 42 and supplies the amplified signal to the A / D converter 48. The A / D converter 48 converts the supplied analog signal into a digital signal and outputs the digital signal to the CPU 30. The pump drive circuit 46 controls the drive of the pump 43 according to a control signal given from the CPU 30. The valve drive circuit 47 controls the opening and closing of the valve 44 in accordance with a control signal given from the CPU 30.

  FIG. 5 shows a functional configuration of electronic blood pressure monitor 1 according to the present embodiment. Referring to FIG. 5, the CPU 30 includes a first pressure adjustment unit 111, a second pressure adjustment unit 112, a blood pressure calculation unit 113, a residual pressure determination unit 114, a memory access unit 117, a display processing unit 118, and a stored data utilization processing unit. 119 and a guest mode use processing unit 120.

  The first pressure adjustment unit 111 controls the pump 33 and the valve 34 via the pump drive circuit 36 and the valve drive circuit 37, and flows in and out of the air into the measurement air bag 50 via the tube 53. Adjust pressure.

  The second pressure adjusting unit 112 controls the pump 43 and the valve 44 via the pump drive circuit 46 and the valve drive circuit 47, and is fixed by flowing air into and out of the fixing air bag 51 via the tube 55. The pressure in the air bag 51 is adjusted. At this time, the second pressure adjustment unit 112 connects the A / D conversion circuit 48, and based on the pressure signal indicating the internal pressure of the fixing bladder 51 input from the A / D conversion circuit 48, the pump drive circuit 46 and The valve drive circuit 47 is controlled.

  The blood pressure calculation unit 113 connects the A / D conversion circuit 38 and calculates blood pressure (maximum blood pressure and minimum blood pressure) based on the cuff pressure signal indicating the cuff pressure Pc input from the A / D conversion circuit 38. The systolic blood pressure corresponds to systolic blood pressure, and the diastolic blood pressure corresponds to diastolic blood pressure.

  Moreover, the blood pressure calculation unit 113 calculates the pulse wave number per predetermined time based on the pulse wave amplitude information superimposed on the cuff pressure signal. A conventional method can be applied to calculate the pulse wave number.

  The remaining pressure determining unit 114 includes a pressurizing time measuring unit 115 that measures the time required to pressurize the pressure in the fixing air bladder 51 and an arm circumference estimating unit 116 based on the time measuring data provided from the timer 42. Including. The arm circumference estimation unit 116 estimates the arm circumference of the upper arm 100 that is the measurement site of the user based on the time data measured by the pressurization time measuring unit 115.

  The memory access unit 117 writes data to the memory 39 or reads data from the memory 39. The display processing unit 118 processes data display on the display 40. Details of the stored data usage processing unit 119 and the guest mode usage processing unit 120 will be described later.

  FIG. 5 shows only a portion of the peripheral circuit of the CPU 30 that directly inputs and outputs with the CPU 30.

  FIG. 6 shows an example of the contents stored in the memory 39. The memory 39 includes storage areas E1, E2 and E3. In the storage area E1, blood pressure measurement data 200 by the blood pressure calculation unit 113 is stored. A table 300 is stored in the storage area E2. The table 300 stores data 301, data 302, and data 303 in association with each other. Data 301 indicates the time required from when the fixing air bladder 51 is completely evacuated to when the second pressure adjusting unit 112 starts pressurization and the internal pressure of the fixing air bladder 51 reaches a predetermined pressure. Data 302 indicates the arm circumference of the user according to the time indicated by the corresponding data 301. The data 303 indicates the level of pressure (hereinafter referred to as residual pressure) that should be left as the internal pressure in the fixing air bladder 51 after the blood pressure measurement is completed, corresponding to the arm circumference data indicated by the corresponding data 302. When the residual pressure is held in the fixing air bag 51, the fixing air bag 51 is in an expanded state. Even in this state, the user can freely insert the arm 100 into the fixing cylindrical case 5 as shown in FIG. The residual pressure is at a level that enables such operation. The data in the table 300 can be measured and stored in advance through experiments or the like.

  A table 400 is stored in the storage area E3. The table 400 stores data 402 indicating the residual pressure level corresponding to each of the ID data 401 for specifying the person to be measured (user) of the electronic sphygmomanometer 1.

  Next, the procedure of blood pressure measurement processing according to the present embodiment will be described with reference to FIGS. The program according to the flowcharts of FIGS. 7 to 9 is stored in the memory 39 in advance, and the processing is realized by the CPU 30 reading out the program instruction code from the memory 39 and executing it. The graphs of FIGS. 10 and 11 are referred to for explaining the procedure of the blood pressure measurement process.

  The electronic sphygmomanometer 1 is assumed to be in an operable state in which power is supplied to each unit when the power switch 41A is turned on. Therefore, it is assumed that the open / closed state of the valve 44 can also be maintained, and the pressure in the fixing air bladder 51 left by the previous blood pressure measurement is also maintained.

  First, when the CPU 30 detects that the user has operated the blood pressure measurement start switch 41B with the arm 100 inserted through the fixing cylindrical case 5 as shown in FIG. 2, the processing of FIG. Be started.

  First, the CPU 30 initializes the work area in the memory 39 (step ST3).

  Subsequently, the CPU 30 detects whether or not the guest mode switch 3 has been operated by the user. When it is detected that the guest mode switch 3 has been operated (YES in step ST5), guest mode processing (ST39) described later is performed.

  On the other hand, when it is detected that the guest mode switch 3 is not operated (NO in step ST5), it is detected whether or not the user ID switch 41D for identifying the user is operated by the user (step ST6). . Here, when the user ID switch 41D is not operated (NO in step ST6), it is determined that there is no change by the user, and the process proceeds to process P1 described later for blood pressure measurement. If it is detected that any one of the user ID switches 41D has been operated (YES in step ST6), the process proceeds to step ST7.

  In step ST7, the CPU 30 inputs the user ID indicated by the operated user ID switch 41D and records it in the temporary storage area of the CPU 30 (step ST7). Data corresponding to the ID is assigned to each user ID switch 41D in advance, and the assigned ID data is output to the CPU 30 when operated. The CPU 30 temporarily stores the input ID data.

  The CPU 30 searches the table 400 in the area E3 of the memory 39 based on the temporarily stored ID data, and determines whether the ID data 401 that matches the ID data has been registered in the table 400 based on the search result. (Step ST9). If it is determined that it has been registered (YES in step ST9), the process proceeds to a storage data use process (step ST41) described later.

  On the other hand, if it is determined that it is not registered (NO in step ST9), the second pressure adjusting unit 112 exhausts the air in the fixing air bladder 51 completely, and then pressurization is started (step ST11). ). This pressurizing process will be described with reference to the graph of FIG. From the start of pressurization, the pressure in the fixing air bladder 51 increases as shown in the graph of FIG. The pressurization time counting unit 115 starts measuring the elapsed time from the start of pressurization by the timer 42 (step ST13). The second pressure adjustment unit 112 drives the pump drive circuit 46 and the valve drive circuit 47 to increase the pressure in the fixing air bladder 51. As a result, when it is determined that the pressure in the fixing air bladder 51 detected by the second pressure adjustment unit 112 via the A / D conversion circuit 48 indicates the predetermined pressure of the pressure PP in FIG. 11 (YES in step ST15). The pressurization time measuring unit 115 reads time data (corresponding to time T1 in FIG. 11) measured by the timer 42 at this time. Thereafter, the processing shifts to processing in step ST17 described later.

  On the other hand, when it is determined that the detected pressure is lower than the predetermined pressure (NO in step ST15), the process returns to step ST11, and the pressurizing process of the pressure in the fixing air bladder 51 is continued. Therefore, the pressurization time measuring unit 115 measures the time required from the start of pressurization of the fixing air bladder 51 using the timer 42 until reaching the predetermined pressure.

  This predetermined pressure refers to the pressure in the fixing air bag 51 necessary for winding the measuring air bag 50 around the arm 100 and fixing it so that the fixing air bag 51 can measure blood pressure. This predetermined pressure is detected in advance by experiments or the like and stored in the memory 39.

  Next, in step ST <b> 17, the arm circumference estimation unit 116 estimates the arm circumference of the user's arm 100. Specifically, the table 300 in the region E2 of the memory 39 is searched based on the time data measured by the pressurization time measuring unit 115, the time 301 corresponding to the time data is specified, and the specified data 301 is stored. Corresponding arm circumference data 302 is read from the table 300. Then, the residual pressure determination unit 114 reads the residual pressure data 303 corresponding to the read arm circumference data 302 from the table 300. Thereby, the residual pressure according to the length of the user's arm circumference is determined (step ST19).

  The residual pressure determination unit 114 stores the residual pressure data determined in step ST19 in the table 400 in the region E3 in association with the user ID data input in step ST7. Thereby, in the table 400, the data 401 indicating the input ID data and the data 402 indicating the determined remaining pressure are associated with each other and additionally registered in the table 400 (step ST20). Thereafter, the processing shifts to blood pressure measurement processing P1.

  When this blood pressure measurement process P1 is completed, the second pressure adjustment unit 112 reduces the pressure in the fixing air bladder 51 to the remaining pressure determined for the user (step ST37). The remaining pressure can be acquired as the remaining pressure data 402 by the second pressure adjusting unit 112 searching the table 400 based on the ID data of the user. Specifically, the second pressure adjustment unit 112 controls the valve drive circuit 47 based on the pressure signal of the fixing bladder 51 input from the A / D conversion circuit 48. Thereby, the valve drive circuit 47 is controlled until the pressure signal of the fixing air bladder 51 indicates the remaining pressure, and the air in the fixing air bladder 51 is exhausted. After the exhaust is completed, the second pressure adjustment unit 112 closes the valve 44. Thereby, the residual pressure in the fixing air bladder 51 is maintained.

Above, the process of FIG. 7 is complete | finished.
Here, the blood pressure measurement process P1 will be described. Referring to FIG. 7, blood pressure measurement process P1 includes steps ST21 to ST35.

  First, the second pressure adjustment unit 112 determines whether or not the pressure signal of the fixing air bladder 51 input from the A / D conversion circuit 48 indicates a predetermined pressure (step ST21). If it is determined that the predetermined pressure is indicated, the process proceeds to step ST23. However, while it is determined that the predetermined pressure is not indicated (NO in step ST21), the pump 43 is driven by the second pressure adjustment unit 112 to fix air. The bag 51 is pressurized (step ST22).

  Next, the second pressure adjusting unit 112 stops the pump 43 that has been driven, and the first pressure adjusting unit 111 starts driving the pump 33 by controlling the pump drive circuit 36 with the valve 34 closed. The cuff pressure Pc of the working air bag 50 is gradually increased (step ST23). When it is determined that the cuff pressure Pc has reached a predetermined level for blood pressure measurement based on the pressure signal output from the A / D conversion circuit 38 in the process of gradually pressurizing, the first pressure adjustment unit 111 causes the pump 33 to Then, the closed valve 34 is gradually opened, the air in the measurement air bladder 50 is gradually exhausted, and the cuff pressure Pc is gradually reduced (step ST25). In the present embodiment, the blood pressure is measured in the slow depressurization process of the cuff pressure Pc.

  First, in the process of gradually reducing the cuff pressure Pc, the blood pressure calculation unit 113 acquires a detection signal of the cuff pressure Pc output from the pressure sensor 32 via the A / D conversion circuit 38 and superimposes it on the signal. The detected pulse wave signal is detected (step ST27). Since the processing procedure of step ST23 to step ST27 is a known procedure, the details are omitted.

  Next, the blood pressure calculation unit 113 calculates blood pressure (maximum blood pressure, minimum blood pressure, etc.) by a known procedure based on the pulse wave signal obtained in step ST27 (step ST29). Details of this will be described later.

  When the blood pressure is calculated in step ST29, the blood pressure calculation unit 113 associates the calculated blood pressure value with the ID data of the user or the timer 42 in the area E1 of the memory 39 via the memory access unit 117. The blood pressure measurement data 200 is stored in association with the measurement time data to be timed (step ST31). Further, the calculated blood pressure value is displayed on the display 40 via the display processing unit 118 (step ST33). Then, the first pressure adjustment unit 111 controls the valve drive circuit 37 to fully open the valve 34. As a result, all the air in the measurement air bladder 50 is exhausted, the arm 100 is not compressed by the measurement air bladder 50, and the user can remove the arm 100 from the fixing cylindrical case 5.

Thereby, a series of blood pressure measurement processing P1 is complete | finished.
Here, the procedure of blood pressure calculation will be described. The blood pressure calculation unit 113 can calculate, for example, blood pressure using a waveform feature amount indicating a change in the amplitude value of the pulse wave signal according to the cuff pressure Pc illustrated in FIG. Specifically, it is known that each of the maximum blood pressure and the minimum blood pressure can be detected at a predetermined ratio from the pulse wave maximum amplitude value of the pulse wave amplitude waveform of FIG. According to FIG. 10, the minimum blood pressure can be detected as the cuff pressure Pc at the position of pulse wave maximum amplitude × β%, and the maximum blood pressure can be detected as the cuff pressure Pc at the position of pulse wave maximum amplitude × α%.

The stored data utilization process will be described with reference to FIG.
The stored data utilization processing unit 119 compares the user ID data input and recorded in the immediately preceding blood pressure measurement process with the ID data of the user who performs the current blood pressure measurement recorded in step ST7, and both ID data are obtained. It is determined whether there is any change by the user based on whether or not they match. When it is detected that the user ID does not match and the user has been changed (YES in step T1), the pressure in the fixing air bladder 51 is adjusted by the second pressure adjustment unit 112 to prepare for blood pressure measurement. (Step ST3).

  In this pressure adjustment, based on the user ID data (referred to as user 1) input and recorded in the immediately preceding blood pressure measurement process and the ID data of the user performing blood pressure measurement this time (referred to as user 2), The stored data use processing unit 119 searches the table 400 of the memory 39 via the memory access unit 117, and reads the residual pressure data 402 corresponding to the ID data 401 corresponding to each of the ID data. Then, the remaining pressure of the read data 402 is compared, and based on the comparison result, an instruction for controlling the internal pressure of the fixing air bladder 51 is output to the second pressure adjusting unit 112. Based on this instruction, the second pressure adjusting unit 112 drives the pump 43 or the valve 44 by controlling the pump driving circuit 46 or the valve driving circuit 47 in accordance with the pressure signal output from the A / D converter 48. As a result, the internal pressure of the fixing air bladder 51 is adjusted.

  For example, if the arm circumference of the user 1> the arm circumference of the user 2, when the user 2 performs the measurement after the user 1 performs the measurement, the user 1 has less residual pressure in the fixing air bag 51. When the user 2 is selected, the second pressure adjustment unit 112 is based on the instruction, and the data indicating that the pressure signal output from the A / D converter 48, that is, the pressure of the fixing air bladder 51 is determined for the user 2 Pressurize until the residual pressure indicated by 402 is reached. In the opposite case, the pressure is reduced until the pressure of the fixing air bladder 51 becomes the remaining pressure indicated by the data 402 determined for the user 2.

  When the immediately preceding blood pressure measurement process is performed in the guest mode process (see FIG. 9), all the air in the fixing air bladder 51 is exhausted (see step T19 in FIG. 9). In step T <b> 3, the second pressure adjustment unit 112 pressurizes the fixing air bladder 51 so that the residual pressure indicated by the data 402 corresponding to the ID data of the user who performs blood pressure measurement this time is obtained.

  After such adjustment of the residual pressure of the fixing air bladder 51, the above-described blood pressure measurement process P1 is executed (step ST5).

  After the blood pressure measurement process ends, air is exhausted from the fixing air bladder 51 (step ST7), and the series of processes ends. In this exhaust, the second pressure adjustment unit 112 controls the internal pressure of the fixing air bladder 51 so as to become the remaining pressure indicated by the data 402 of the table 400 determined for the user.

  By performing the above stored data utilization processing, as shown in FIG. 12, every time the user whose blood pressure is to be measured is switched, the residual pressure in the fixing air bag 51 is the residual pressure between the users before and after the switching. Pressurization or decompression is performed by the difference. Therefore, the pressure in the fixing air bag 51 for blood pressure measurement preparation can be adjusted to a value corresponding to the user's arm circumference. Moreover, since this adjustment should just pressurize and pressure-reduce only the difference of the residual pressure between users, the drive time of the pump 43 can be shortened.

  Next, the guest mode process will be described with reference to FIG. In the guest mode process, first, the second pressure adjusting unit 112 performs a process of exhausting all the air in the fixing air bladder 51 (step T11). Subsequently, the above-described blood pressure measurement process P1 is executed (step ST17). After completion of the blood pressure measurement process, the air in the fixing air bladder 51 is exhausted by the second pressure adjustment unit 112 (step ST19). Thereby, the guest mode process ends.

  In the blood pressure measurement process P1 in the guest mode process, the calculated blood pressure data is displayed but may not be stored in the memory 39.

  The effect by this Embodiment is demonstrated with reference to FIG. 13 and FIG. 13 and FIG. 14 conceptually show pressurization times t1 to t4 required from the start of pressurization of the fixing air bladder 51 until the measurement air bladder 50 is wound and fixed on the user's arm 100. Has been. In FIG. 13, the residual pressure is not adjusted according to the arm circumference of the user of the fixing air bag 51. Therefore, the pressurization time required from the start of pressurization of the fixing air bladder 51 until the measurement air bladder 50 is wound and fixed on the user's arm 100 is increased for each user (for each arm circumference). They are different (in FIG. 13, the difference between time t1 and time t2 is large). That is, for a user with a short arm circumference, the time required for winding and fixing is long, and for a user with a long arm circumference, the time is short. Therefore, the measurement time including the pressurization time of the fixing air bladder 51 varies greatly depending on the arm circumference, and the battery life is greatly different.

  On the other hand, in the present embodiment, as shown in FIG. 14, the processing for blood pressure measurement is started in a state where the residual pressure is held in the fixing air bag 51, that is, the fixing air bag 51 is By starting the measurement process in a state where it is inflated to some extent, even a user with a short arm circumference can shorten the measurement time including the pressurization time of the fixing air bladder 51. That is, the difference between the time t3 of the user with short arm circumference and the time t4 of the user with long arm circumference can be reduced. Therefore, since the measurement time including the pressurization time of the fixing air bag 51 can be shortened regardless of the arm circumference, the battery life can be prolonged.

  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.

It is a figure which shows the external appearance of the electronic blood pressure meter applied to embodiment of this invention. It is a figure which shows roughly the use condition of the electronic blood pressure monitor applied to embodiment of this invention. It is a block block diagram of the electronic blood pressure meter applied to embodiment of this invention. It is a block diagram of the air system of the electronic blood pressure monitor applied to embodiment of this invention. It is a functional lineblock diagram of an electronic sphygmomanometer concerning an embodiment of this invention. It is a figure which shows the example of the content of the memory which concerns on embodiment of this invention. It is a processing flowchart concerning an embodiment of this invention. It is a flowchart of the storage data utilization process which concerns on embodiment of this invention. It is a flowchart of the guest mode process which concerns on embodiment of this invention. It is a figure explaining the example of the blood-pressure calculation procedure applied to embodiment of this invention. It is a figure explaining the pressurization process of the air bag for fixation which concerns on embodiment of this invention. It is a figure explaining adjustment of the residual pressure of the air bag for fixation concerning an embodiment of this invention. It is a figure explaining the effect which concerns on embodiment of this invention. It is a figure explaining the effect which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Electronic sphygmomanometer, 50 measurement air bag, 51 fixing air bag, 111 1st pressure adjustment part, 112 2nd pressure adjustment part, 113 Blood pressure calculation part, 114 Residual pressure determination part, 115 Pressurization time timer part, 116 Arm circumference estimation unit, 119 stored data use processing unit, 120 guest mode use processing unit.

Claims (5)

A blood pressure measurement bag that expands when a fluid is supplied; and a fixing bag that winds and fixes the measurement bag around the measurement site of the measurement subject when the fluid is supplied and inflated during blood pressure measurement. An electronic sphygmomanometer comprising:
A blood pressure calculation unit that wraps the measurement bag that is supplied with the fluid and expands around a measurement site, and calculates blood pressure based on the pressure in the measurement bag;
A residual pressure determining means for determining a residual pressure to be left as an internal pressure of the fixing bag;
A pressure adjusting means for adjusting the internal pressure of the fixing bag after the blood pressure measurement to be the determined residual pressure, and holding the adjusted residual pressure until the start of the next blood pressure measurement,
The residual pressure determining means includes
Time measuring means for measuring the time required to pressurize the internal pressure after discharging the fluid from the fixing bag during blood pressure measurement to a predetermined pressure;
A peripheral length estimating means for estimating the peripheral length of the measurement site based on the time measured by the time measuring means,
An electronic sphygmomanometer that determines the residual pressure according to the perimeter estimated by the perimeter estimation means. The electronic blood pressure monitor further includes:
Identification means for identifying a person to be measured for blood pressure measurement using the electronic blood pressure monitor;
The electronic sphygmomanometer according to claim 1, further comprising: a residual pressure storage unit that stores the determined residual pressure in association with each identified person to be measured.   The residual pressure held in the fixing bag at the start of the blood pressure measurement is adjusted so as to be the residual pressure for each person to be measured read from the residual pressure storage means. Electronic blood pressure monitor.   The electronic sphygmomanometer according to claim 1, wherein the predetermined pressure indicates a pressure level for wrapping and fixing the measurement air bag around the measurement site for blood pressure measurement. The electronic sphygmomanometer is
A time required for pressurizing to the predetermined pressure, the peripheral length corresponding to the time, and a table preliminarily storing data of the residual pressure corresponding to the peripheral length,
The perimeter estimation unit reads the corresponding perimeter by searching the table based on the time measured by the time measuring unit during blood pressure measurement,
The residual pressure determining means includes
The electronic sphygmomanometer according to claim 1, wherein the table is searched based on the read peripheral length and the corresponding residual pressure is read.

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