JP2008012161A - Pulse wave detecting device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To switch and display a graph showing the distribution of the pulse pressure of a measured region according to the direction of eyes at the graph. <P>SOLUTION: The pulse wave is measured using a pressure sensor array pressed on the measured region in such a way that the direction of the array crosses the artery. The measurement is started from the pressure sensor at one end of the pressure sensor array to be pressed on the measured region to the pressure sensor at the other end in the order of arrangement of the pressure sensors in the array, and graph data with continuously plotted pressure data output from the respective pressure sensors are prepared (S3a). Then, the graph based on the prepared graph data is displayed (S5 and S6). In the display, the graph is displayed as seen from the view-point on one side of the plane on which the pressure array is disposed and which includes the direction crossing the artery, and if a command to switch the direction is given from outside (S4), the graph is switched to the one as seen from the view-point on the other side of the plane and displayed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pulse wave detection device and a program, and more particularly to a pulse wave detection device and a program in which a positioning operation of a sensor for pulse wave detection is performed.

  When the pulse wave of the person to be measured (patient, etc.) is measured using a pulse wave meter, the measured pulse wave includes an extruded pressure wave (ejection wave) of blood flow from the heart and a reflected pressure wave from the end. (Reflected wave) is detected. By measuring the pulse wave including the ejection wave and the reflected wave, the degree of hardening (aging) of the blood vessel of the measurement subject can be known. Therefore, measuring the pulse wave is very important for knowing the health condition of the subject.

  A conventional pulse wave detection device includes a sensor unit attached to a measurement site such as a wrist. At the time of measurement, the person to be measured moves the sensor unit to the optimum measurement position, that is, the position of the artery. Rough alignment is performed by manual operation, but fine adjustment determines the artery position while actually measuring the pulse wave.

Such a pulse wave detection device is disclosed in Patent Documents 1 and 2, for example. The devices described in these documents have a function of displaying the finally determined position as a tonogram on the screen of the display unit. The tonogram shows the distribution of pulse pressure detected by the pulse wave sensor of the sensor unit. During fine adjustment, the sensor unit is moved while looking at the displayed tonogram to search for an optimum position.
JP 2003-325463 A JP 2004-222847 A

  However, in the devices disclosed in Patent Documents 1 and 2, it is difficult to associate the direction in which the sensor unit attached to the arm should be moved with the direction in which the artery indicated by the displayed tonogram is located. That is, it is difficult to determine in which direction the sensor unit should be moved simply by looking at the tonogram.

  The pulse wave device is often used in medical institutions, etc., but the tonogram refers to the distribution of pulse pressure according to the viewpoint of the person wearing the sensor unit or according to the viewpoint of the operator (such as a doctor). It was displayed without clearly indicating the distribution of pulse pressure. Therefore, it has been difficult for both the measurement subject and the measurement subject to clearly grasp the direction in which the sensor unit should be moved from the tonogram.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pulse wave detection device and a program for switching and displaying according to the direction of viewing a graph showing the distribution of pulse pressure at a detected measurement site.

  Another object of the present invention is to provide a pulse wave detection device and a program for displaying a moving direction of a pressure sensor array in accordance with a distribution of pulse pressure at a detected measurement site.

  A pulse wave detection device according to one aspect of the present invention has a surface on which a plurality of pressure sensors are arranged, and the surface is pressed onto a living artery so that the arrangement direction of the pressure sensors intersects the artery. A pressure sensor array, a pressure means for pressing the surface of the pressure sensor array onto the artery, and a pressure sensor disposed at the other end, starting from a pressure sensor at one end of the pressure sensor array pressed by the pressure means Until, according to the order of the arrangement of the pressure sensors in the array, a graph creation means for creating graph data continuously plotting the pressure data output by each pressure sensor, and a graph based on the graph data created by the graph creation means, Display control means for displaying on the display unit, and the display control means is arranged in a direction in which the pressure sensor array is arranged and intersects with the artery when the surface is pressed Graph viewed from one side viewpoints sandwiching the plane containing, and among the graph as seen from the other side of the viewpoint sandwiching the plane display one corresponding to the switching instruction given from the outside.

  Preferably, the display control unit switches and displays the graph viewed from the one side viewpoint displayed on the display unit to the graph viewed from the other side viewpoint in accordance with a switching instruction given from the outside.

  Preferably, in response to the switching instruction, the graph displayed on the display unit starts from the pressure sensor at the other end of the pressure sensor array and continues to the pressure sensor arranged at the one end in the order of arrangement of the pressure sensors. Accordingly, the pressure data output from each pressure sensor is switched to a graph continuously plotted.

  Preferably, the display control means displays data indicating different viewpoints for viewing the graph together with the graph.

  Preferably, the display control unit displays a state in which the displayed graph viewed from one viewpoint changes to a graph viewed from the other viewpoint.

  Preferably, the graph has an axis corresponding to the arrangement of the pressure sensors, and the pressure data output by each pressure sensor is continuously plotted in the direction of the axis according to the order of the arrangement of the pressure sensors in the arrangement. In response to the switching instruction, the display control means corresponds to the arrangement of the graph with the central axis passing through the plot point indicating the pressure data output from the pressure sensor arranged in the center of the pressure sensor array as the center. Rotate in the direction of the axis and reverse.

Preferably, the display control unit displays the state of the rotating graph.
Preferably, the pressure sensor array is slidable in the arrangement direction, and detects the position of the pressure sensor array located on the artery according to the distribution of the pulse pressure indicated by the graph data generated by the graph generating means. Based on the detected position, the direction indicating data indicating the direction in which the pressure sensor array should slide is displayed on the display unit.

  Preferably, the direction instruction data indicates the direction in which the slide movement is to be performed according to the viewpoint of viewing the displayed graph.

  Preferably, the pressure sensor array is housed in the housing and can be slid in the arrangement direction in the housing, and a pattern indicating each of the slidable directions is printed on the surface of the housing. The instruction data indicates a picture that indicates a direction corresponding to the direction in which the slide movement is possible among the directions in which the slide movement is possible.

  Preferably, the display control means displays a picture indicating one end or the other end where the pressure sensor for outputting the pressure data is arranged in association with the pressure data plotted at the start point or the end point of the graph, The picture designating one end or the other end coincides with the picture designating each of the slidable directions printed on the casing.

  Preferably, the pressure sensor array is housed in a casing, and can be slid in the arrangement direction within the casing. A mark is printed on the outer surface of the pressure sensor array, and a mark is externally applied to the casing. A checkable opening is formed in the direction of the slide movement, and a plurality of colored marks of different colors are printed around the opening on the surface of the housing, and the display control means should slide. The direction is indicated by displaying data instructing the alignment between the pressure sensor array mark and any one of the colored marks.

  Preferably, the pressure sensor array is housed in a casing, and can be slid in the arrangement direction within the casing. A mark is printed on the outer surface of the pressure sensor array, and a mark is externally applied to the casing. An identifiable opening is formed in the direction of the slide movement, and a plurality of different characters or symbols are printed around the opening on the surface of the housing, and the display control means moves in the direction to slide. Is displayed by displaying data indicating the alignment of the mark of the pressure sensor array with any one of a plurality of different characters or symbols.

  Preferably, the direction instruction data indicates the direction to be slid in accordance with the viewpoint of viewing the displayed graph, using a picture of a housing housing the pressure sensor array viewed from the viewpoint.

  According to another aspect of the present invention, the pressure sensor array has a surface on which a plurality of pressure sensors are arranged, and the surface is pressed onto an artery of a living body so that the arrangement direction of the pressure sensors intersects the artery. And a pressing means for pressing the surface of the pressure sensor array onto the artery. A program for causing a computer to execute display in the pulse wave detection device is one of the pressure sensor arrays pressed by the pressing means. Starting from the pressure sensor at the end to the pressure sensor arranged at the other end, creating a graph that creates graph data that continuously plots the pressure data output by each pressure sensor according to the order of pressure sensor arrangement in the array A display control step for displaying a graph based on the graph data created in the graph creation step on the display unit. In the graph, when the surface is pressed, the pressure sensor array is arranged, and a graph viewed from one viewpoint across the plane including the direction intersecting the artery, and a graph viewed from the other viewpoint across the plane Among them, one corresponding to a switching instruction given from the outside is displayed on the display unit.

  Preferably, in the display control step, a graph viewed from one viewpoint displayed on the display unit is switched to a graph viewed from the other viewpoint in accordance with a switching instruction given from the outside.

  Preferably, in the display control step, in a state where the surface is pressed, a graph viewed from a viewpoint on one side across which a plane including the direction intersecting the artery is arranged is displayed, and in response to a switching instruction Thus, the display is switched to the graph viewed from the viewpoint on the other side across the plane.

  Preferably, the pressure sensor array can be slid in the arrangement direction, and in the display control step, the arrangement of the pressure sensors located on the artery according to the distribution of the pulse pressure indicated by the graph data created in the graph creation step Is detected, and based on the detected position, direction indication data indicating the direction in which the pressure sensor array should slide is displayed on the display unit.

  According to the invention, since the graph display of the display unit has a function capable of switching to the display from the reverse viewpoint, it is possible to display a graph according to the direction in which the graph is viewed. Further, the display unit can instruct the direction in which the pressure sensor array should be moved from the current viewpoint direction (direction in which the graph is viewed).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same code | symbol shows the same or an equivalent part.

  1 and 2 show a functional configuration of the pulse wave detection device according to the present embodiment. FIG. 3 shows the connection relationship between each part including the sensor unit and the fixed base. FIG. 4 shows a state in which the pulse wave detection device is mounted on a living body. 3 and 4, the pulse wave detection device is a sensor unit 1 mounted on the wrist surface for detecting a pulse wave in the artery of the wrist, and a fixing base for fixing the wrist for pulse wave detection. 2 and a display unit 3 for executing various processes including calculations for pulse wave detection and blood pressure measurement. In FIG. 3, the sensor unit 1 is accommodated in the housing 100. In FIG. 4, the sensor unit 1 is guided by the groove 9 (see FIG. 3) and is slid to the outside from the housing 100 to be positioned on the wrist. The status is indicated.

  The fixed base 2 contains a fixed base unit 7. The fixed base unit 7 and the sensor unit 1 are connected via a communication cable 5 and an air pipe 6. The cuff 52 attached to the blood pressure measurement site and the display unit 3 are connected via an air tube 53. Here, the fixed base unit 7 and the display unit 3 are connected via a USB (Universal Serial Bus) cable 4 for communication, but may be connected wirelessly.

  When the pulse wave is detected, as shown in FIG. 4, the user places the sensor unit 1 on the surface of the wrist on the artery side by sliding and moving the sensor unit 1 with the wrist placed on the fixed base 2 at a predetermined position. The casing 100 and the fixing base 2 are fastened via the belt 8 so that the sensor unit 1 on the wrist is not displaced. As the measurement mode, only three types of measurement are assumed: only pulse wave measurement using the sensor unit 1, only blood pressure measurement using the cuff 52, or both measurements.

  The sensor unit 1 for detecting a pulse wave is attached to the wrist. A cuff 52 for blood pressure measurement is wound (mounted) on the upper arm. The manner of mounting is as follows. For example, the pulse wave and blood pressure may be detected simultaneously on the left and right arms, such as mounting the sensor unit 1 on the left arm and mounting the cuff 52 on the right arm. Alternatively, as shown in FIG. 4, the sensor unit 1 and the cuff 52 may be attached to the same arm, and blood pressure may be measured following the detection of the pulse wave.

  Referring to FIG. 1, a sensor unit 1 includes a plurality of pressure sensors 26 including a plurality of diaphragms and a resistance bridge circuit for detecting a pulse pressure. Pressure sensor array 11 arranged in one direction, multiplexer 12 for selectively deriving a voltage signal corresponding to the pulse pressure detected by each of a plurality of pressure sensors 26 in pressure sensor array 11, and pressure sensor array 11 A pressing cuff 13 including an air bag whose pressure is adjusted so as to be pressed onto the wrist. The display unit 3 notifies the user of a tonogram and information for guiding the sliding direction of the sensor unit 1 as will be described later.

  The fixed base unit 7 includes a pressurizing pump 14 for pressurizing an internal pressure (hereinafter referred to as cuff pressure) of a pressing cuff (air bag) 13, a negative pressure pump 15 for depressurizing, a pressurizing pump 14 and a negative pressure pump 15. A switching valve 16 for selectively switching one of the air pipe 6 to the air pipe 6, a control circuit 17 for controlling them, a communication circuit 18 to which the USB cable 4 is connected to communicate with the display unit 3, and An A / D (Analog / Digital) converter 19 for converting an output signal derived from the sensor unit 1 into digital data is provided.

  The display unit 3 includes a CPU (Central Processing Unit) 20 that executes various processes including calculations to centrally control the pulse wave detection device, and a ROM (Read that stores data and programs for controlling the pulse wave detection device. Only Memory (Random Access Memory) 21 and RAM (Random Access Memory) 22, an operation unit 23 which is provided to be operated from the outside and is operated to input various information, and various information such as pulse wave detection results and blood pressure measurement results are externally provided. A display 24 comprising an LCD (Liquid Crystal Display) for output, an external I / F (Interface) 41, a timer 43 for measuring the current time and outputting it as time data, a blood pressure measuring unit 50, a blood pressure measuring unit 50, The communication circuit 71 for connecting the CPU 20 by communication, and the communication circuit 18 of the fixed base unit 7 and the CPU 20 are connected via the USB cable 4. A communication circuit 72 for connecting.

  The external I / F 41 is detachably mounted with a CD-ROM (Compact Disk-Read Only Memory) 42 and accesses data of the mounted CD-ROM 42. The blood pressure measurement unit 50 connects a cuff 52 attached to the upper arm via an air tube 53.

  Here, the fixed base unit 7 and the display unit 3 of the fixed base 2 are provided separately, but a configuration in which both functions are built in the fixed base 2 may be employed. In the case of being built in, the operation unit 23 and the display 24 are attached to the case of the fixed base 2 so that the operation unit 23 and the display 24 can be operated from the outside or the display content can be confirmed from the outside.

  FIG. 2 shows the configuration of the blood pressure measurement system 50 and its related parts. Referring to FIG. 2, blood pressure measurement system 50 has a pressure sensor 54 whose capacity changes depending on the pressure in air bag 51 (hereinafter referred to as “cuff pressure”) built in cuff 52, and the capacitance value of pressure sensor 54. An oscillation circuit 55 that outputs a signal having a corresponding oscillation frequency to the communication circuit 71 via the I / F 60, a pump 56 and a valve 58 for adjusting the cuff pressure level, a pump drive circuit 57 that drives the pump 56, and a valve The valve drive circuit 59 for adjusting the opening / closing degree of 58 is provided. The air bladder 51, the pressure sensor 54, the pump 56 and the valve 58 are connected via an air pipe 53. The I / F 60 converts a signal obtained from the oscillation circuit 15 into a pressure signal (a pressure pulse wave signal indicating a change in arterial volume) and outputs the pressure signal to the communication circuit 71.

  With reference to FIG. 5, the functional configuration of the pulse wave detection device according to the embodiment will be described. The pulse wave detection device includes a blood pressure calculation unit 201 that calculates blood pressure measurement values described later, a display control unit 202 that controls display of information and data on the display 24, and a memory that controls storage and reading of data in the memory (RAM 22). The control unit 203, the pulse pressure information output from the pressure sensor 26 transmitted from the communication circuit 18 is input, the tonogram generation unit 204 that generates a tonogram based on the input information, and the tonogram of the display 24 for the display control unit 202. A switching unit 205 for instructing switching of the display, a pulse pressure processing unit 206 for inputting pulse pressure information output from the pressure sensor 26 transmitted from the communication circuit 18 and processing a pulse wave based on the input information, a display A dialog display control unit 207 that instructs the control unit 202 to display a predetermined dialog on the display 24 is provided. The dialog display control unit 207 has a function for displaying a predetermined dialog when the position of the sensor unit 1 with respect to the measurement site is not appropriate, in other words, when an error occurs.

  In the RAM 22, blood pressure data 300 indicating blood pressure measurement (calculation) result data, tonogram data 301 indicating tonogram data created by the tonogram creation unit 204, and information on the pulse wave obtained by the pulse wave processing unit 206 are stored. The pulse wave information 302 to be pointed out, the display data for the patient to point to the dialog data displayed on the display 24 (A side) and (B side) 303 and 305, and the display data for the operator (A side) and (B side) 304 and 306 are stored. Details of these data 303 to 306 will be described later.

  In the above-described configuration, when measuring blood pressure, the blood pressure calculation unit 201 performs blood pressure (mmHg) (systolic blood pressure corresponding to the maximum blood pressure) according to a predetermined algorithm based on the pressure signal input via the communication circuit 71. pressure) and diastolic blood pressure equivalent to the minimum blood pressure) and pulse rate (pulse: beat / minute). Since such a calculation procedure can be a well-known procedure provided conventionally, the detailed description thereof is omitted here. Hereinafter, the blood pressure value calculated in this way, or the blood pressure value and the pulse rate are also referred to as “blood pressure measurement value”. In the present embodiment, the blood pressure measurement value is output to the memory storage unit 203 for each blood pressure measurement. The memory storage unit 203 stores the input blood pressure measurement value in the RAM 22 as the blood pressure data 300 associated with the time data (measurement time data) input from the timer 43. The display control unit 202 displays the blood pressure data 300 read from the RAM 22 on the display 24. The display control unit 202 displays the current time data input from the timer 43 on the display 24.

  The operation unit 23 includes switches 23A and 23B operated to instruct switching of the display form of the tonogram on the display 24, and switches 23C and 23D operated to instruct start and stop of measurement.

  6A to 6E show the configuration of the sensor unit 1. FIG. 6B shows a cross-sectional structure of the sensor unit 1 in FIG. 6A in the direction crossing the wrist when the wrist is worn. FIG. 6C is an enlarged view of a part of the broken line frame in FIG. When the cuff pressure of the press cuff 13 of FIG. 6 (B) is adjusted by the pressurization pump 14 and the negative pressure pump 15, the pressure sensor array 11 attached through a block formed of ceramic or resin is shown in FIG. C) freely moves in the direction of the arrow 25 shown by the amount corresponding to the cuff pressure level. The pressure sensor array 11 moves downward from the arrow 25 (in the wrist direction), thereby protruding from an opening provided in advance in the housing 100 and being pressed against the wrist surface. As shown in FIGS. 6D and 6E, the arrangement direction of the plurality of pressure sensors 26 of the pressure sensor array 11 is substantially perpendicular to (intersects) the artery when the sensor unit 1 is attached to the wrist. The array length is at least longer than the diameter of the artery. When each of the pressure sensors 26 is pressed by the cuff pressure of the pressing cuff 13, pressure information that is a pressure vibration wave (pulse pressure) generated from an artery and transmitted to the living body surface is output as a voltage signal. For example, 40 pressure sensors 26 are arranged on the pressing surface 40 having a predetermined size (5.5 mm × 8.8 mm). The direction in which the groove 9 that guides the sliding movement direction of the sensor unit 1 in FIG. 6A corresponds to the arrangement direction of the pressure sensors 26 of the pressure sensor array 11.

  FIG. 7 shows a cut surface along the line VII-VII in FIG. In FIG. 7, since the cuff pressure of the pressure cuff 13 is sufficiently reduced by the negative pressure pump 15 (because it has a pressure level sufficiently lower than the atmospheric pressure), the pressure sensor array 11 is placed in the housing 100 of the sensor unit 1. It is stored and is not in contact with the wrist surface.

  In the present embodiment, at the time of measuring the pulse wave, a tonogram indicating the distribution of the pulse pressure detected by the pressure sensor array 11 is displayed via the display 24. Therefore, the direction in which the solid object or radial artery 27 is located can be notified to the user by the tonogram. The user can confirm the direction of the radial artery 27, that is, the direction in which the sensor unit 1 should be slid, by the tonogram. Details of this notification will be described later.

  Here, the direction in which the sensor unit 1 is slid will be described. As described above, when the sensor unit 1 is mounted on the wrist, the arrangement direction of the plurality of pressure sensors 26 corresponds to a direction substantially orthogonal (crossing) with the radial artery 27 and the sensor unit 1 guided by the groove 9. The slide movement direction corresponds to the arrangement direction of the pressure sensors 26. Therefore, the slide movement direction of the sensor unit 1 corresponds to a direction substantially orthogonal (crossing) the radial artery 27.

  FIGS. 8 and 9 show marks 61 and 62 (arrows with letters “A” and “B”) printed on the casing 100 of the sensor unit 1. The mark 61 in FIG. 8 is guided by the groove 9 on the side surface of the housing 100 that houses the sensor unit 1 and is guided by the groove 9 so that the slide movement operation can be performed from the patient side with the sensor unit 1 mounted on the wrist. Possible directions are printed as → and ←, and each arrow is printed with characters (“A” and “B”) that uniquely indicate the direction. Here, the direction in which the slide movement operation can be performed is indicated by a pattern by a combination of a character and an arrow. However, as long as the direction can be indicated, a pattern such as another character, a numerical value, or a figure may be used.

  In a state in which the sensor unit 1 is attached to the patient's wrist (see FIG. 4), the letters ‘A’ of the marks 61 and 62 indicate the left side of the patient, and the letter ‘B’ indicates the right side of the patient. Therefore, in a state where the sensor unit 1 is mounted, sliding the sensor unit 1 to the letter “A” side means that a person (patient or operator) on the patient side slides to the left side of the person. Sliding the sensor unit 1 to the letter 'B' side means sliding operation to the right side of the person.

  Further, in a state where the sensor unit 1 is attached to the patient's wrist (see FIG. 4), the person (operator) who is in a position facing the patient with the sensor unit 1 in between is the letter “A” of the marks 61 and 62. Refers to the person's right side and the letter 'B' refers to the left side. Therefore, when the sensor unit 1 is mounted, when the person slides the sensor unit 1 to the letter 'A' side, it means that the person slides to the right side of the person and slides to the letter 'B' side. Means to slide to the left side of the person. Although not shown here, a mark 61 as shown in FIG. 8 is also printed on the surface of the case 100 of the sensor unit 1 on the side of the person (operator) facing the patient and the sensor unit 1. ing.

  The marks 62 in FIGS. 9A and 9B indicate that the patient wearing the sensor unit 1 on the wrist or the operator can check the upper surface of the housing 100 that houses the sensor unit 1. The direction in which the sensor unit 1 is to be slid by being guided by the groove 9 is printed as → and ←, and each arrow is printed with a letter ('A' and 'B') uniquely indicating the direction. ing.

  9A and 9B, an opening (window) 67 is formed in a part of the upper surface of the housing 100. As shown in FIG. A mark 66 is printed on the upper surface of the sensor unit 1. As the sensor unit 1 is guided by the groove 9 and slides, the mark 66 also moves in the direction of sliding in the opening.

  Here, referring to FIG. 9A, a plurality of bar-shaped marks 64 are printed on one side of the upper surface of the housing 100 that houses the sensor unit 1 with the opening 67 interposed therebetween, and also on the other side. A bar mark 64 is printed at a position corresponding to each bar mark. Each of the bar-shaped marks is colored with a different color, and the bar-shaped marks positioned correspondingly across the opening 67 are colored with the same color.

  FIG. 9B shows a mark 65 in which characters (numerical values here) are printed instead of the bar-shaped mark pattern of FIG. 9A. The numerical value indicated by the mark 65 indicates the same value between numerical values positioned correspondingly across the opening 67.

  When the sensor unit 1 is slid by the guidance of the groove 9, the mark 66 of the sensor unit 1 is aligned with the position of the value of the bar mark of any color of the mark 64 or the value of the mark 65. Operate as follows. The purpose of this operation will be described later.

  A processing procedure according to the present embodiment will be described with reference to the flowchart of FIG. The program according to the flowchart and the data to be referred to when the program is executed are stored in advance in the ROM 21 or RAM 22, and the process proceeds by the CPU 20 reading and executing the program while referring to the data as appropriate. Here, it is assumed that the display unit 3 is in an operable state by being supplied with power.

  First, the user turns on a power switch (not shown) of the operation unit 23. In response to the ON operation, the CPU 20 instructs the control circuit 17 via the communication circuit 18 to switch the switching valve 16 to the negative pressure pump 15 side to drive the negative pressure pump 15 (step S1). Therefore, the control circuit 17 switches the switching valve 16 based on the instruction to drive the negative pressure pump 15.

  When the negative pressure pump 15 is driven, it acts to make the cuff pressure sufficiently lower than the atmospheric pressure via the switching valve 16, so that the pressure sensor array 11 moves in the direction of the upward arrow of the arrow 25 in FIG. Moving. As a result, it can be avoided that the pressure sensor array 11 protrudes carelessly and malfunctions or breaks down.

  Thereafter, when the measurer attaches the sensor unit 1 to the wrist as shown in FIG. 4 and turns on the start button of the operation unit 23, the control circuit 17 determines whether or not the pressure sensor array 11 has moved according to the instruction signal of the CPU 20. That is, it is determined whether or not the sensor unit 1 has been slid so as to be positioned on the wrist surface along the slide groove 9 (S2). A micro switch (not shown) for detecting slide movement is provided in the housing 100 of the sensor unit 1, and the control circuit 17 determines whether or not the pressure sensor array 11 has moved based on the detection signal of the micro switch. Determine.

  While it is not determined that it has moved (NO in step S2), the process of step S1 is repeated. If it is determined that it has moved (YES in step S2), the control circuit 17 determines whether or not the switch 23C has been operated based on the operation signal given from the operation unit 23 (step S2a). If the determination result indicates that the switch 23C is not operated, that is, the start of measurement is not instructed (NO in step S2a), the process returns to step S1, and thereafter, step S1 is performed until the switch 23C is operated. And S2 are repeated.

  On the other hand, when the determination result in step S2a indicates that the switch 23C has been operated, that is, the start of measurement has been instructed (YES in step S2a), the control circuit 17 sets the switching valve 16 to the pressure pump 14 side. And the pressurizing pump 14 is driven (step S3). As a result, the cuff pressure rises and the pressure sensor array 11 moves in the downward arrow direction of the arrow 25 in FIG. 6C, and the pressure sensor array 11 is pressed against the surface of the wrist.

  When the pressure sensor array 11 is pressed onto the wrist surface (see FIG. 7), the pressure information of the voltage signal (information indicating the pulse pressure) is derived from each pressure sensor 26 via the multiplexer 12, and the A / D converter 19. The digital information is converted to digital information and supplied to the tonogram creation unit 204 of the display unit 3 via the communication circuit 18. In this case, pressure information is given to the tonogram creation unit 204 in accordance with the order of the positions from the pressure sensor 26 at one end of the arrangement of the pressure sensor array 11 to the pressure sensor 26 at the other end. The tonogram creation unit 204 creates a tonogram using the given digital information (pressure information), and outputs the created tonogram data 301 to the memory control unit 203 (S3a). The memory control unit 203 stores the given data in the RAM 22.

  At this time, based on the switching operation signal input from the operation unit 23, the switching unit 205 determines whether the display of the tonogram is currently designated to switch to a mode according to the operator viewpoint or the patient viewpoint (S4). . Here, it is assumed that the switch 23A or 23B is operated in advance by a patient or an operator. Therefore, for example, when the switch 23A is operated in advance, the switching unit 205 instructs the display control unit 202 to display a tonogram for the patient viewpoint based on the switching operation signal input by the operation. When the switch 23B is operated in advance, the display control unit 202 is instructed to display a tonogram for the operator viewpoint based on the switching operation signal input by the operation.

  The display control unit 202 reads the tonogram data 301 from the RAM 22 and displays the tonogram on the display 24 according to the instruction given from the switching unit 205 based on the read data (S5, S6). Here, the display form of the tonogram is changed in accordance with an instruction given from the switching unit 205. The tonogram created and displayed will be described later.

  Next, the pulse wave processing unit 206 executes a process of excluding the solid matter of the tendon 29 based on the tonogram (step S7). In the solid matter exclusion process, the pressure sensor 26 located on the solid matter in the pressure sensor array 11 is identified based on the tonogram information obtained in S3a, and the remaining pressures excluding the identified pressure sensor 26 are identified. The sensor 26 is selected as a candidate for the pressure sensor 26 located on the radial artery 27.

  Next, the pulse wave processing unit 206 executes a process for selecting the pressure sensor 26 located on the radial artery 27 as an optimum channel from the candidates for the pressure sensor 26 located on the radial artery 27 (step S8). ). Details of this optimum channel selection processing are described in detail in Japanese Patent Application Laid-Open No. 2005-228688, and will be briefly described here.

  The tonogram data 301 includes, for each pressure sensor 26, DC component data and AC component data indicated by the pulse pressure signal detected by the pressure sensor 26. The CPU 20 specifies that all the pressure sensors 26 whose DC component level is equal to or higher than a certain threshold value are not located on the radial artery 27. Then, the CPU 20 regards the remaining pressure sensors 26 excluding the identified pressure sensor 26 as candidates for pressure sensors located on the radial artery 27. From these candidates, the pressure sensor 26 having a lower DC component level and a higher AC component level is selected as the optimum channel.

  Next, in order to detect a pulse wave based on pressure information input from the pressure sensor 26 corresponding to the selected optimum channel, the pulse wave processing unit 206 calculates and calculates the amount of change in the press level by the press cuff 13. The fluctuation amount is compared with a predetermined fluctuation amount capable of detecting a pulse wave (step S9). As a result of the comparison, if the calculated fluctuation amount satisfies the predetermined fluctuation amount, it is determined that the cuff pressure condition for pulse wave detection is satisfied (YES in step S10). While the pressurization of the press cuff 13 by the pressurization pump 14 is continued, the processes of steps S3a to S10 are repeated until the cuff pressure condition is satisfied.

  When the cuff pressure condition is satisfied (YES in step S10), the pressurizing pump 14 is adjusted so that the pressing level against the pressure sensor array 11 by the pressing cuff 13 becomes the optimum level for pulse wave detection (step S11). ). Details of this adjustment are described in Patent Document 2, so details are omitted here.

  The pressure information output from the pressure sensor 26 selected as the optimum channel under the optimum pressure adjustment for the pressing cuff 13, that is, the waveform data of the pulse wave of the radial artery 27 is the multiplexer 22, the A / D converter 19, and the like. It is transferred to the pulse wave processing unit 206 via the communication circuit 18 (step S12).

  The pulse wave processing unit 206 receives the waveform data and detects a pulse wave based on the received waveform data. The process of transferring the pulse wave data in step S12 is repeated until the waveform data is received and it is determined that the predetermined condition for ending the pulse wave detection is satisfied. Since the pulse wave detection process based on the received waveform data follows a known procedure, the details are omitted here.

  When the predetermined condition for ending the pulse wave detection is satisfied (YES in step S13), the CPU 20 controls to drive the negative pressure pump 15 via the switching valve 16 (step S14). Thereby, the pressing state of the pressure sensor array 11 with respect to the wrist is released, and the series of pulse wave detection processing ends.

  The pulse wave processing unit 206 outputs the detected pulse wave information to the memory control unit 203. The memory control unit 203 stores the given information as pulse wave information 302 in the RAM 22. The display control unit 202 reads the pulse wave information 302 from the RAM 22 and outputs the read pulse wave information 302 to the outside via the display 24. The pulse wave information may be used for calculating an AI (Augmentation Index) by the pulse wave processing unit 206 so that the calculated AI is output to the display 24.

  Here, the tonogram created (displayed) in step S3a and step S5 (S6) will be described.

  FIG. 11 shows an example of display based on the created tonogram data 301 in association with the arrangement direction of the sensors 26 of the pressure sensor array 11. FIG. 12 shows the state of pulse wave measurement. In FIG. 12, in the state where the measurement site of the patient is pressed against the pressing surface 40 of the sensor unit 1, the pressure sensor array 11 on the pressing surface 40 is arranged and substantially orthogonal to the radial artery 27 ( There is a patient's viewpoint on one side of a plane (virtual plane, not shown) including a crossing direction, and an operator's viewpoint on the other side. That is, it is assumed that the operator is at a position facing the patient as shown in FIG.

  Referring to FIG. 11, tonogram data 301 created by tonogram creation unit 204 is formed by associating each of pressure sensors 26 of pressure sensor array 11 with the level indicated by the pulse pressure signal output from the pressure sensor. It is data. The display control unit 202 reads the tonogram data 301 from the RAM 22 and displays a graph as shown in FIG. 11 based on the read data. In the graph, the pulse pressure level is represented by the vertical axis VJ, and the horizontal axis HJ is associated with the arrangement of the pressure sensors 26. Then, with the origin O as the starting point of the plot of the graph, the level indicated by the pulse pressure signal output from each pressure sensor 26 in the order according to the arrangement from the A-side pressure sensor 26 to the B-side pressure sensor 26 is continuously set. It is a graph that is plotted. Therefore, with respect to the horizontal axis HJ, the character CH of “A” is displayed in association with the origin O side, and the character CH of “B” is displayed in association with the opposite side of the origin O. The character CH matches the character of the mark 61 printed on the housing 100. Therefore, the patient or the operator can associate the plot start point or end point with the output of the pressure sensor 26 at one end and the other end of the array of the pressure sensor array 11. The tonogram of FIG. 11 is a display example when the instruction given from the switching unit 205 indicates the patient viewpoint.

  When the instruction given from the switching unit 205 points to the operator's viewpoint, the tonogram of FIG. 11 uses the origin O in the horizontal axis HJ direction as the starting point of the plot of the graph from the pressure sensor 26 on the B side to the A side. The level indicated by the pulse pressure signal output from each pressure sensor 26 is displayed as a continuously plotted graph in the order according to the arrangement of the pressure sensors 26. That is, the display control unit 202 displays the inverted version of the tonogram of FIG. 11 based on the tonogram data 301 read from the RAM 22.

  Specifically, an axis passing through a point on the tonogram in which the output level of the pressure sensor 26 located at the center M of the pressure sensor array 11 is plotted, and centering on an axis MJ orthogonal to the horizontal axis HJ, is shown in FIG. Is a graph obtained by inverting the tonogram in the direction of the horizontal axis HJ. In this case, a letter CH of “B” is displayed on the origin O side with respect to the horizontal axis HJ, and a letter CH of “A” is displayed on the side opposite to the origin O.

  Although the character CH is used here, if the correspondence between the one end of the arrangement of the pressure sensor array 11 and the output of the pressure sensor 26 at the other end is possible, the character is replaced with a character or a pattern such as a figure. May be. Further, although both the characters ‘A’ and ‘B’ corresponding to both ends are displayed, only the character at one end may be displayed.

  Therefore, as shown in FIG. 12, when the patient measures with the display unit 3 arranged so that the screen of the display 24 faces him / her, the patient switch 23A is operated to show the measurement in FIG. A tonogram of the patient's viewpoint can be displayed. Therefore, the patient has both the letter “A” displayed together with the tonogram and the letter “A” that matches the display character of the mark 61 or 62 printed on the housing 100 of the sensor unit 1. It can be confirmed that both of the letters “B” are on the right side of the patient. Therefore, when the sensor unit 1 is moved while watching the tonogram change, an error in the moving operation direction can be prevented.

  In addition, the operator facing the patient in FIG. 12 with the sensor unit 1 changes the arrangement of the display unit 3 so that the screen of the display 24 is directed to the operator to confirm the tonogram. 23B is operated. Thereby, the tonogram shown in FIG. 11 can be displayed in reverse to display the tonogram of the operator viewpoint. Accordingly, the operator must indicate that both the character “A” displayed with the tonogram and the character “A” that matches the display character of the mark 61 or 62 printed on the housing 100 of the sensor unit 1 It can be confirmed that the letter “B” is on the left side of the operator. Therefore, when the sensor unit 1 is moved while watching the tonogram change, an error in the moving operation direction can be prevented.

(Dialog display)
In the present embodiment, the direction in which the sensor unit 1 is operated and slid along the groove 9 may be guided to the patient or the operator by displaying a dialog. In order to display the dialog, patient display data (A side) and (B side) 303 and 305 and operator display data (A side) and (B side) 304 and 306 in the RAM 22 are used.

  FIG. 13 shows an example of a tonogram displayed for each of the operator viewpoint and the patient viewpoint, and dialogs E1 and E2. In FIG. 13, a mark 63 indicating whether the tonogram corresponds to the operator viewpoint or the patient viewpoint is displayed on the tonogram of the operator viewpoint and the patient viewpoint by the display control unit 202 together with the tonogram.

  The dialog display instruction unit 207 reads the tonogram data 301 via the memory control unit 203, analyzes the read tonogram data 301, and determines whether the tonogram is an optimal tonogram based on the analysis result. Here, the optimum tonogram is a tonogram in which the value corresponding to the center position M of the tonogram indicates the peak value as shown in FIG. In other words, when the central pressure sensor 26 of the pressure sensor array 11 is positioned on the radial artery 27 while the pressing surface 40 is pressed against the measurement site, an optimal tonogram as shown in FIG. 11 is measured. According to the tonogram of FIG. 11, the distribution state of the pulse pressure around the radial artery 27 at the measurement site can be confirmed at a glance.

  The dialog display instruction unit 207 determines whether or not the pressure sensor 26 indicating the peak value of the tonogram data 301 is the pressure sensor 26 located at the center of the pressure sensor array 11. If it is not determined that the pressure sensor 26 is located in the center, the display control unit 202 displays an error message dialog. That is, guidance for moving the sensor unit 1 to a position where the optimum tonogram can be obtained is displayed.

  Specifically, the dialog display instruction unit 207 displays the dialog E1 or E2 of the operator viewpoint or the patient viewpoint according to another signal of the operation of the switches 23A and 23B given from the switching unit 205 to the display control unit 202. Instruct to display. The display control unit 202 reads data based on the given instruction from the RAM 22 via the memory control unit 203, and displays a dialog E1 or E2 on the display unit 24 according to the read data. A specific display example is shown in FIG.

  As a specific example of the dialog E2, FIG. 14A shows an operator viewpoint, and FIG. 14B shows a patient viewpoint. When the optimum tonogram is not measured, the moving direction by the sliding operation of the sensor unit 1 is guided by a dialog so that the central pressure sensor 26 of the pressure sensor array 11 is positioned on the radial artery 27.

  For example, when the dialog display instruction unit 207 detects the peak value of the operator viewpoint tonogram in FIG. 13 on the side opposite to the origin O across the axis MJ in FIG. Since the display control unit 202 is instructed to display the display data for operator (B side) 306, the display control unit 202, based on the instruction, displays the display data for operator (B side) via the memory control unit 203. 306 is read and displayed on the display 24. The dialog shown in FIG. 14A is displayed based on the display data for operator (B side) 306, and the sensor unit 1 is moved together with the pattern of the sensor unit 1 so as to move the sensor unit 1 to the 'B' side indicated by the mark 61 or 62. The operation direction (←) is guided.

  When the peak value of the tonogram at the patient viewpoint in FIG. 13 is detected on the origin O side with the axis MJ in FIG. 11 in between, the dialog display instruction unit 207 similarly displays the patient display data (B side). ) Since the display control unit 202 is instructed to display 305, the display control unit 202 reads out the patient display data (B side) 305 via the memory control unit 203 based on the instruction and displays it on the display 24. To do. The dialog shown in FIG. 14B is displayed based on the patient display data (B side) 305, and the sensor unit 1 is moved together with the pattern of the sensor unit 1 so as to move the sensor unit 1 to the 'B' side indicated by the mark 61 or 62. The operation direction (→) is guided.

  Therefore, the operator or the patient can know the direction of moving by being guided by the groove 9 by operating the sensor unit 1 worn by the patient.

  Also, the dialog informs which direction to move in the balloon circle by aligning the mark 66 and the mark 64 with the bar-shaped mark. Since the displayed bar-shaped mark coincides with the bar-shaped mark colored in a different color on the upper surface of the housing 100 housing the sensor unit 1, the direction of sliding is indicated by the color of the bar-shaped mark. be able to.

  FIG. 15 shows a dialog when the mark 65 is provided instead of the mark 64 in the same manner as in FIG. The order (ascending order or descending order) of the numerical values of the displayed marks 65 coincides with that of the marks 65 printed on the upper surface of the housing 100 that houses the sensor unit 1. A guideline can be given by the numerical value.

(Tonogram display mode when switching)
The display control unit 202 is a tonogram in a process in which the displayed tonogram viewed from the viewpoint of the patient side (one side) changes (switches) to the tonogram viewed from the viewpoint of the operator side (the other side). A state in which the shape of the display changes may be displayed on the display 24.

  FIG. 16 shows an example of a tonogram display switching mode by the display control unit 202 when the switches 23A and 23B are operated. When the switch 23A is operated and the switch 23B is operated to switch the display to the operator viewpoint in the state where the upper tonogram of FIG. 16 is displayed in response to the operation of the switch 23A, the display control unit 202 The displayed tonogram is simulated by rotating the process until the tonogram is rotated in the direction of the axis HJ about the axis MJ in FIG. Show. As a result of the frame advance of the rotating graph, the inverted tonogram at the bottom, that is, the tonogram from the viewpoint of the operator is displayed.

  Here, the switching instruction is given by operating the switch 23A or 23B of the display unit 3, but instead, the sensor unit 1 may be provided with the switches 23A and 23B so as to be given from the sensor unit 1. Good.

  Further, here, two switches 23A and 23B are provided to give a switching instruction. However, one switch, for example, a toggle switch that can give an instruction to switch the operator viewpoint / patient viewpoint every time it is operated (pressed). It may be. Further, the direction of the display device 24 may be changed by a turning operation, and the display may be switched between the tonogram from the operator viewpoint and the tonogram from the patient viewpoint according to the turning operation.

  In the above-described embodiment, the display unit 3 receives information on the pulse pressure detected by the sensor unit 1 from the fixed base unit 7 by communication, but the receiving method is not limited to this. That is, the CPU 20 may read and acquire the pulse wave information via the external I / F 41 from the CD-ROM 42 in which the information on the pulse pressure detected by the sensor unit 1 is stored.

  The display method of tonograms and the like performed by the pulse wave detection device according to the present invention can also be provided as a program. Such a program can be recorded on a computer-readable recording medium such as a flexible disk, a CD-ROM, a ROM, a RAM, and a memory card attached to the computer and provided as a program product. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk built in the computer. A program can also be provided by downloading via a network. For example, in the configuration of FIG. 1, the program can be supplied to the display unit 3 that includes the CPU 20 and has a computer function by using the CD-ROM 42. The CPU 20 reads and executes the program stored in the CD-ROM 42 via the external I / F 41.

  The provided program product is installed in a program storage unit such as a hard disk, and is read and executed by the CPU. The program product includes the program itself and a recording medium on which the program is recorded.

  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 hardware block diagram of the pulse wave detection apparatus which concerns on this Embodiment. It is a hardware block diagram of the blood pressure measurement unit which concerns on this Embodiment. It is a figure which shows the arrangement | positioning of the switch of the operation part which concerns on this Embodiment, and the connection aspect of a sensor unit and a fixed base. It is a figure which shows the usage condition at the time of the pulse wave measurement which concerns on this Embodiment. It is a functional lineblock diagram of a pulse wave detecting device concerning this embodiment. (A)-(E) are figures which show the structure of the pressure sensor array of the sensor unit which concerns on embodiment of this invention. It is a figure which shows the cross section in the VII-VII line of FIG. It is a housing | casing side view of the sensor unit which concerns on this Embodiment. (A) And (B) is a housing | casing top view of a sensor unit. It is a processing flowchart concerning this embodiment. It is a figure explaining the tonogram which concerns on this Embodiment in association with a pressure sensor array. It is a figure which shows the state which the screen has faced the patient which concerns on this Embodiment. It is a figure which shows an example of the output which concerns on this Embodiment. (A) And (B) is a figure which shows the other example of the output which concerns on this Embodiment. It is a figure which shows the further another example of the output which concerns on this Embodiment. It is a figure which shows the example of a display in the middle of the display switching of the tonogram which concerns on this Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Sensor unit, 2 Fixing stand, 3 Display unit, 10 Printing part, 11 Pressure sensor array, 17 Control circuit, 20 CPU, 24 Display, 27 Radial artery, 201 Blood pressure calculation part, 202 Display control part, 203 Memory control part 204 Tonogram creation unit, 205 switching unit.

Claims (18)

A pressure sensor array having a surface on which a plurality of pressure sensors are arranged, the surface being pressed on an artery of a living body so that the arrangement direction of the pressure sensors intersects the artery;
Pressing means for pressing the surface of the pressure sensor array onto the artery;
Each pressure sensor outputs from the pressure sensor at one end of the pressure sensor array pressed by the pressing means to the pressure sensor arranged at the other end according to the order of the arrangement of the pressure sensors in the array. Graph creating means for creating graph data in which pressure data to be continuously plotted is created;
Display control means for displaying a graph based on the graph data created by the graph creation means on a display unit,
The display control means includes
In a state where the surface is pressed, the graph is viewed from one viewpoint that sandwiches a plane including the direction in which the pressure sensor array is arranged and intersects the artery, and viewed from the other viewpoint that sandwiches the plane. In addition, the pulse wave detection device that displays one of the graphs according to a switching instruction given from the outside on the display unit. The display control means includes
The graph viewed from the one-side viewpoint displayed on the display unit is switched to the graph viewed from the other-side viewpoint in accordance with the switching instruction given from the outside. The pulse wave detection device described.   In response to the switching instruction, the graph displayed on the display unit starts from the pressure sensor at the other end of the pressure sensor array and continues to the pressure sensor disposed at the one end. 3. The pulse wave detection device according to claim 1, wherein the pulse wave detection device according to claim 1, wherein the pressure data output from each pressure sensor is switched and displayed in a continuously plotted graph in accordance with the order of arrangement of the pressure sensors. The display control means includes
The pulse wave detection device according to any one of claims 1 to 3, wherein, together with the graph, data indicating whether the viewpoint is viewing the graph is displayed. The display control means includes
5. The pulse wave detection device according to claim 2, wherein a state in which the displayed graph viewed from the one viewpoint is changed to the graph viewed from the other viewpoint is displayed. . The graph has an axis corresponding to the arrangement of the pressure sensors, and the pressure data output by each pressure sensor is continuously plotted in the direction of the axis according to the order of the arrangement of the pressure sensors in the arrangement. And
The display control means includes
In response to the switching instruction, the graph corresponding to the array is centered on a central axis passing through a plot point indicating the pressure data output by the pressure sensor arranged in the center of the pressure sensor. The pulse wave detection device according to claim 2, wherein the pulse wave detection device is rotated in the direction of an axis and reversed.   The pulse wave detection device according to claim 6, wherein the display control unit displays a change state of the graph during the rotation. The pressure sensor array can be slid in the arrangement direction,
According to the distribution of the pulse pressure indicated by the graph data created by the graph creation means, the position in the array of the pressure sensors located on the artery is detected, and based on the detected position, the pressure sensor array The pulse wave detection device according to any one of claims 1 to 7, wherein direction indication data for instructing a direction to slide is displayed on the display unit. The direction indication data is
The pulse wave detection device according to claim 8, wherein the direction in which the slide movement is to be performed is instructed according to different viewpoints when viewing the displayed graph. The pressure sensor array is housed in a housing and can be slid in the array direction in the housing,
On the surface of the housing is printed a pattern that indicates each of the slidable directions,
The pulse wave detection device according to claim 9, wherein the direction instruction data indicates the picture that indicates a direction corresponding to the direction to be slid out of the slide movable directions. The display control means includes
In association with the pressure data plotted at the start point or end point of the graph, a picture indicating the one end or the other end where the pressure sensor that outputs the pressure data is arranged is displayed.
The pulse wave detection device according to claim 10, wherein a picture designating the one end or the other end coincides with a picture printed on the casing and indicating each of the slidable directions. The pressure sensor array is housed in a housing and can be slid in the array direction in the housing,
A mark is printed on the outer surface of the pressure sensor array,
In the case, an opening that can confirm the mark from the outside is formed in the sliding movement direction,
On the surface of the housing, a plurality of different colored marks are printed around the opening,
The display control means includes
10. The pulse wave according to claim 9, wherein the direction of the sliding movement is indicated by displaying data instructing alignment between the mark of the pressure sensor array and any one of the colored marks. Detection device. The pressure sensor array is housed in a housing and can be slid in the array direction in the housing,
A mark is printed on the outer surface of the pressure sensor array,
In the case, an opening that can confirm the mark from the outside is formed in the sliding movement direction,
On the surface of the housing, a plurality of different characters or symbols are printed around the opening,
The display control means includes
The direction in which the slide is to be moved is indicated by displaying data indicating an alignment between the mark of the pressure sensor array and any one of the plurality of different characters or symbols. The pulse wave detection device according to 1. The direction indication data is
The direction of the sliding movement is instructed by using a picture of the housing accommodating the pressure sensor array viewed from the viewpoint according to the viewpoint of viewing the displayed graph. Pulse wave detector. A pressure sensor array having a surface on which a plurality of pressure sensors are arranged, the surface being pressed on an artery of a living body so that the arrangement direction of the pressure sensors intersects the artery;
A program for causing a computer to execute display in a pulse wave detection device comprising: pressing means for pressing the surface of the pressure sensor array onto the artery;
Each pressure sensor outputs from the pressure sensor at one end of the pressure sensor array pressed by the pressing means to the pressure sensor arranged at the other end according to the order of the arrangement of the pressure sensors in the array. A graph creation step for creating graph data continuously plotting pressure data to be
A display control step of displaying a graph based on the graph data created by the graph creation step on a display unit,
In the display control step,
In a state where the surface is pressed, the graph is viewed from one viewpoint that sandwiches a plane including the direction in which the pressure sensor array is arranged and intersects the artery, and viewed from the other viewpoint that sandwiches the plane. A program that displays one of the graphs according to a switching instruction given from the outside on the display unit. In the display control step,
The graph viewed from the one-side viewpoint displayed on the display unit is switched to the graph viewed from the other-side viewpoint in accordance with the switching instruction given from the outside. The listed program. In the display control step,
In the state where the surface is pressed, the graph is viewed from one viewpoint across the plane including the direction in which the pressure sensor array is arranged and intersects the artery, and according to the switching instruction, The program according to claim 15 or 16, wherein the display is switched to the graph viewed from the viewpoint on the other side across the plane. The pressure sensor array can be slid in the arrangement direction,
In the display control step,
According to the distribution of the pulse pressure indicated by the graph data created by the graph creation step, the position of the pressure sensor located on the artery is detected in the array, and based on the detected position, the pressure sensor array The program according to any one of claims 15 to 17, wherein direction indication data for instructing a direction to be slid is displayed on the display unit.

Images