Biometric information display device

Abstract

To display the correct heart beat.SOLUTION: A biological information display device comprises: a first acquisition unit which acquires a first biological signal including a first heart beat signal of the heart beat of a living body in a non-contact manner on the basis of a reflection signal obtained from reflection of an emitted electromagnetic wave signal by the living body; a second acquisition unit which acquires a second biological signal including the heart beat of the living body or a second heart beat signal related to the heart beat by contacting the living body; and a display unit which extracts the second heart beat signal from the second biological signal, extracts the first heart beat signal in the same or approximate cycle as / to the second heart beat signal from the first biological signal, and displays the heart beat based on the extracted first heart beat signal.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a biological information display device that displays biological information. [Background technology]

[0002] There are known non-contact biological information detection methods, such as a method of using a microwave radar to detect biological information such as the heart rate of a living body based on microwaves reflected by the living body (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-32880 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned method of detecting biological information is non-contact, so biological information can be easily detected, but there is a problem that it is easy for external noise to be mixed in. For example, when detecting the heartbeat of a patient in an emergency using a microwave radar, there is a possibility that reflected waves from people (such as caregivers) or objects near the patient may be mixed in, or electromagnetic waves from other testing equipment may interfere. In such cases, it may not be possible to detect and display an accurate heartbeat.

[0005] An object of the present invention is to provide a biological information display device capable of displaying an accurate heart rate. [Means for solving the problem]

[0006] The biological information display device according to the present invention comprises: a first acquisition unit that acquires a first biological signal including a first heartbeat signal of a heartbeat of the living body in a non-contact manner based on a reflected signal of the radiated electromagnetic wave signal reflected by the living body; A second acquisition unit that contacts the living body and acquires a second biological signal including a heartbeat of the living body or a second heartbeat signal related to the heartbeat; a display unit that extracts the second heartbeat signal from the second biological signal, extracts the first heartbeat signal having the same or similar cycle to the second heartbeat signal from the first biological signal, and displays a heartbeat based on the extracted first heartbeat signal; Equipped with. Effect of the Invention

[0007] According to the present invention, an accurate heart rate can be displayed. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic configuration diagram illustrating an example of a biological information display device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram illustrating an example of the biological information display device shown in FIG. [Diagram 3] 4 is a flowchart illustrating an example of a method for displaying biological information by the biological information display device shown in FIG. [Figure 4] 4 is a flowchart illustrating a measurement and display subroutine in the flowchart shown in FIG. 3. [Diagram 5] 1A and 1B are diagrams illustrating a method for extracting a heart rate signal from a biological signal measured by a radar device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0010] [Biometric information display device] Fig. 1 is a schematic diagram showing a biological information display device 10 according to the present embodiment. Fig. 2 is a block diagram illustrating the biological information display device 10 shown in Fig. 1.

[0011] The bioinformation display device 10 of this embodiment is configured, as an example, to be installed inside an ambulance vehicle 30, and function as a bioinformation display monitor that acquires and displays the bioinformation of a patient P who is being transported by ambulance and placed on a stretcher 40 and brought into the vehicle.

[0012] The biological information display device 10, the specific configuration of which will be described later with reference to Fig. 2, has a device main body 11. To the device main body 11, as an example, a radar device 21, an electrocardiograph 22, a pulse oximeter 23, and a camera 24 are connected. In Fig. 1, the devices connected to the device main body 11 and the connections to the devices connected to the devices are indicated by dashed lines.

[0013] 1, the electrocardiograph 22 and the pulse oximeter 23 are independent from the device main body 11, but the device main body 11 may incorporate the electrocardiograph 22 and the pulse oximeter 23 to function as an integrated biological information display monitor. Furthermore, a blood pressure monitor for measuring the blood pressure of the patient P may be incorporated. The biological information display device 10 may be configured to include at least one of the electrocardiograph 22 and the pulse oximeter 23.

[0014] The stretcher 40 can be fixed to a predetermined location of the ambulance vehicle 30, for example, to the floor surface 31. The radar device 21 and the camera 24 are installed, for example, on the ceiling 32 of the ambulance vehicle 30 so as to be able to acquire biological information of the patient P from above the patient P on the fixed stretcher 40.

[0015] The radar device 21 (first acquisition unit in the present invention) is a device that acquires the heartbeat of a patient P non-contact by using a radar, and is positioned to radiate an electromagnetic wave signal toward the patient P on the stretcher 40 (e.g., toward the chest area near the heart).

[0016] Periodic and minute vibrations are present on the body surface of the patient P due to the patient P's breathing and heartbeat. When an electromagnetic wave signal such as a microwave is radiated from the radar device 21 toward the chest of the patient P, the electromagnetic wave signal is reflected by the body surface of the patient P even if the electromagnetic wave signal is radiated through clothing. The reflected signal of the electromagnetic wave signal reflected by the body surface of the patient P undergoes a Doppler shift (frequency transition) due to the vibration of the body surface caused by breathing and heartbeat. Since the reflected signal contains irregular body movements such as turning over in bed in addition to periodic heartbeat and breathing, the radar device 21 extracts and acquires the heartbeat by removing the signal due to periodic breathing and the signal due to irregular body movements.

[0017] The radar device 21 for acquiring the heartbeat can use known technology such as that described in the cited document 1. For example, microwaves or millimeter waves may be used as the electromagnetic waves, and fast Fourier transform or the like may be used for signal processing for extracting the heartbeat. As the electromagnetic waves, 24 GHz microwaves, which have high resolution for measuring the distance to an object, are suitable.

[0018] The camera 24 is disposed so as to be able to photograph the face of the patient P on the stretcher 40 without contact. Also, the camera 24 may be configured to recognize the position of the face of the patient P based on the image photographed by the camera 24, and automatically adjust the orientation of the camera 24 so as to photograph the face of the patient P. The camera 24 photographs the face of the patient P and acquires the condition of the patient P, such as the complexion and lip color. At this time, it may be possible to determine, for example, whether cyanosis is present, based on the acquired complexion and lip color.

[0019] In this way, the radar device 21 and the camera 24 are installed on the ceiling 32 of the ambulance vehicle 30, and are adapted to constantly monitor the patient P on the stretcher 40 in a non-contact manner.

[0020] The electrocardiograph 22 (second acquisition unit in the present invention) has a plurality of electrodes 221 (only one is shown in FIG. 1 for convenience). The plurality of electrodes 221 are attached to the skin of the patient P. The electrocardiograph 22 acquires an electrocardiogram (electrocardiogram) indicating the electrical activity of the heart from the plurality of electrodes 221.

[0021] The pulse oximeter 23 (second acquisition unit in the present invention) has a measurement probe 231. The measurement probe 231 is attached to, for example, a finger of the patient P. The pulse oximeter 23 irradiates the finger with red light and infrared light from the measurement probe 231, acquires oxygen saturation (for example, percutaneous arterial blood oxygen saturation) from the ratio of the amount of transmitted light between the red light and the infrared light that have passed through the finger, and acquires the pulse rate from changes in these. The oxygen saturation refers to the proportion of hemoglobin that is bound to oxygen (oxyhemoglobin) among the hemoglobin in red blood cells in blood (arterial blood).

[0022] In this manner, the electrocardiograph 22 and the pulse oximeter 23 are adapted to monitor the electrocardiogram, oxygen saturation, and pulse rate by bringing the electrodes 221 and the measurement probe 231 into contact with the patient P on the stretcher 40.

[0023] The device main body 11 is configured to be mountable on a vehicle, and is fixed, for example, to a wall surface 33 of an ambulance vehicle 30. The device main body 11 has, for example, an operation unit 12, a display unit 13, a storage unit 14, a communication unit 15, a notification unit 16, and a control unit 17, as shown in FIG.

[0024] Operation unit 12 includes various operation keys such as a numeric keypad and a start key, and receives input operations for inputting various settings and instructions by the user, and outputs operation signals to control unit 17. Operation unit 12 may also include input devices such as a keyboard, a pointing device (mouse, trackball, etc.), and a voice input device.

[0025] The display unit 13 displays various information such as acquired data (e.g., heart rate, electrocardiogram, etc.), various operation screens, etc., in accordance with a display control signal input from the control unit 17. The display unit 13 may be configured, for example, with a liquid crystal display with a touch panel, and in this case, it functions as both a display unit and an operation unit.

[0026] The storage unit 14 is a storage device for saving acquired data (e.g., heart rate, electrocardiogram, etc.) etc. The storage unit 14 may use a removable storage medium (hereinafter, a removable storage medium) such as a non-volatile memory card, may be a non-removable one such as an internal non-volatile memory or an internal hard disk drive, or may include both.

[0027] The communication unit 15 performs communication processing to transmit and receive acquired data to and from other terminals, such as mobile phones, computers, servers, etc., via a network, such as a mobile phone line or a wireless LAN (Local Area Network). Note that the communication unit 15 is not limited to wireless communication and may be capable of wired communication.

[0028] The notification unit 16 is, for example, a speaker or a buzzer, and notifies an alarm to a rescue worker (user) who uses the biological information display device 10. In the case of this embodiment, for example, when the control unit 17 determines that the heart rate of the patient P is not within a predetermined range, the notification unit 16 is used to notify an alarm. At this time, the control unit 17 may display an indication of the alarm on the display unit 13.

[0029] The control unit 17 controls the above-mentioned operation unit 12, display unit 13, storage unit 14, communication unit 15, notification unit 16, radar device 21, electrocardiograph 22, pulse oximeter 23, camera 24, etc., to control the operation of the entire biological information display device 10. The control unit 17 is composed of, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), etc. The CPU of the control unit 17 reads out various programs such as a processing program stored in the ROM, expands them in the RAM, and executes various processes according to the expanded programs.

[0030] [Operation of biological information display device and biological information display method] An example of the operation of the biological information display device 10 having the above-mentioned configuration and a biological information display method will be described with reference to Figs. 3 to 5. Fig. 3 is a flowchart for explaining an example of a biological information display method by the biological information display device 10. Fig. 4 is a flowchart for explaining a measurement and display subroutine in the flowchart shown in Fig. 3. Fig. 5 is a diagram for explaining a method of extracting a heartbeat signal from a biological signal measured by a radar device 21.

[0031] (Step S11) Before a patient P who is being transported by ambulance is carried into the ambulance vehicle 30, the control unit 17 of the device main body 11 performs measurement using the radar device 21 at a predetermined location in the ambulance vehicle 30 (for example, the location where the stretcher 40 is placed). Here, in order to measure standing waves (noise) in the interior of the ambulance vehicle 30, the radar device 21 measures a background signal Sg before the patient P is carried in (see FIG. 5). The measured background signal Sg is stored in the memory unit 14.

[0032] (Step S12) The control unit 17 confirms whether the patient P has been carried into the ambulance vehicle 30. For example, the patient P is placed on a stretcher 40, carried into the ambulance vehicle 30, and the stretcher 40 is fixed to a predetermined position of the ambulance vehicle 30. The control unit 17 determines whether the patient P is present on the stretcher 40, for example, by a sensor that detects the weight of the stretcher 40, and confirms whether the patient P has been carried into the ambulance vehicle 30. If the control unit 17 cannot confirm that the patient P has been carried into the ambulance vehicle 30 (NO), it repeats step S12 until it can be confirmed, and if it can be confirmed (YES), it proceeds to step S13.

[0033] (Step S13) When it is confirmed that the patient P has been carried into the ambulance vehicle 30, the control unit 17 automatically starts measuring the heart rate of the patient P using the radar device 21 and photographing the patient P using the camera 24. The measured heart rate and photographed images are stored in the memory unit 14. At this time, the control unit 17 displays the heart rate measured by the radar device 21 and the image (face image) photographed by the camera 24 on the display unit 13.

[0034] After the stretcher 40 has been fixed to a predetermined position in the ambulance vehicle 30, the electrodes 221 of the electrocardiograph 22 and the measurement probe 231 of the pulse oximeter 23 are attached to the patient P by the ambulance staff.

[0035] (Step S14) The control unit 17 checks whether an operation key for starting measurement has been pressed. For example, the control unit 17 checks whether an operation key for starting measurement on the operation unit 12 has been pressed by an ambulance crew member. If the control unit 17 cannot confirm that the operation key for starting measurement has been pressed (NO), it repeats step S14 until it can confirm that the operation key for starting measurement has been pressed, and if it can confirm that it has been pressed (YES), it proceeds to step S15.

[0036] (Step S15) When the operation key for starting measurement is pressed, the control unit 17 starts measuring an electrocardiogram using the electrocardiograph 22 and measuring oxygen saturation, pulse rate, etc. using the pulse oximeter 23, and stores the measured signals in the memory unit .

[0037] (Step S16) The electrocardiogram (second biological signal in the present invention) S2 measured by the electrocardiograph 22 includes a signal of the heartbeat of the patient P (second heartbeat signal in the present invention), and the heartbeat can be obtained from the electrocardiogram (see FIG. 5).

[0038] The amount of transmitted light (second biological signal in the present invention) measured by the pulse oximeter 23 includes a pulse signal (second heart rate signal in the present invention) related to the heart rate of the patient P, and the pulse rate can be obtained from the fluctuations in the amount of transmitted light.

[0039] A reflected signal (first biological signal in the present invention) S1 of an electromagnetic wave signal radiated from the radar device 21 includes a heartbeat signal (first heartbeat signal in the present invention) of the patient P. The radar device 21 can acquire the heartbeat by processing the reflected signal S1. However, as described above, the reflected signal S1 measured by the radar device 21 may be contaminated by reflected waves reflected from a person (e.g., a caregiver) or object near the patient P, or may be interfered with by electromagnetic waves from other testing equipment.

[0040] Therefore, in this embodiment, the control unit 17 extracts from the reflected signal S1 a signal having a period synchronized with or approximating the heart rate acquired by the electrocardiograph 22 or the pulse rate acquired by the pulse oximeter 23. In this manner, a signal of the heart rate of the patient P (first heart rate signal) is obtained, and the heart rate is acquired.

[0041] For example, a heartbeat is obtained from an electrocardiogram S2 shown in FIG. 5 measured by the electrocardiograph 22, and a period T2 of the heartbeat is obtained. Then, a signal having a period T1 synchronized with or approximating the period T2 of the heartbeat obtained by the electrocardiograph 22 is extracted from the reflected signal S1 shown in FIG. 5 measured by the radar device 21. At this time, a background signal Sg shown in FIG. 5 is removed from the reflected signal S1 shown in FIG. 5 by, for example, waveform processing such as filtering or frequency spectrum analysis. At this time, a signal due to breathing or a signal due to irregular body movement is also removed from the reflected signal S1 shown in FIG. 5 by, for example, waveform processing such as filtering or frequency spectrum analysis. In this way, a heartbeat signal Sh as shown in FIG. 5 can be obtained, and a heartbeat can be obtained. Note that the heartbeat and breathing of a person other than the patient P may be measured, and the measured heartbeat and breathing signals of the person other than the patient P may be removed from the reflected signal S1 shown in FIG. 5.

[0042] Since the heartbeat signal (first heartbeat signal) of the patient P is obtained from the reflected signal measured by the radar device 21 using the heartbeat of the electrocardiograph 22 and the pulse of the pulse oximeter 23, which are measured simultaneously with the radar device 21, an accurate heartbeat can be obtained. Also, for the heartbeat of the radar device 21 measured before obtaining the heartbeat of the electrocardiograph 22 and the pulse of the pulse oximeter 23, an accurate heartbeat can be obtained by re-obtaining the heartbeat signal of the patient P from the recorded reflected signal using the same method.

[0043] Once a signal having a period synchronized with or similar to the heart rate acquired by the electrocardiograph 22 or the pulse rate acquired by the pulse oximeter 23 is extracted from the reflected signal, the radar device 21 can extract a signal having a similar period from the reflected signal. This allows the non-contact radar device 21 to continue measuring the heart rate even if the electrodes 221 of the electrocardiograph 22 or the measurement probes 231 of the pulse oximeter 23 become detached and the electrocardiograph 22 or the pulse oximeter 23 cannot continue measuring.

[0044] For example, even if the patient P consciously or unconsciously removes the electrodes 221 of the electrocardiograph 22 or the measurement probe 231 of the pulse oximeter 23, the radar device 21 can continuously measure the heart rate.

[0045] For the patient P for whom it is difficult to wear the electrodes 221 of the electrocardiograph 22 or the measurement probe 231 of the pulse oximeter 23 for a long period of time, it is sufficient to wear at least one of them temporarily. Using the heart rate of the electrocardiograph 22 or the pulse rate of the pulse oximeter 23 that can be measured temporarily (for a short period of time), a heart rate signal (first heart rate signal) of the patient P can be obtained from the reflected signal measured by the radar device 21, and an accurate heart rate can be obtained. For example, this is applicable to a case where it is difficult to wear the electrodes 221 of the electrocardiograph 22 or the measurement probe 231 of the pulse oximeter 23 for a long period of time on the patient P due to a burn or the like.

[0046] (Step S17) Taking the above cases into consideration, in this embodiment, a measurement and display subroutine is executed as described below (see FIG. 4).

[0047] (Step S17-1) The control unit 17 continues to measure the biological information of the patient P using the electrocardiograph 22, the pulse oximeter 23, and the radar device 21, and continues to photograph the patient using the camera 24.

[0048] (Step S17-2) The control unit 17 judges whether the electrocardiograph 22 and the pulse oximeter 23 have acquired biological information of the patient P. For example, if there is no signal measured by the electrocardiograph 22 and the pulse oximeter 23, it judges that the biological information has not been acquired. If the biological information has been acquired (YES), the process proceeds to step S17-3, and if the biological information has not been acquired (NO), the process proceeds to step S17-4.

[0049] (Step S17-3) When the biological information has been acquired, the control unit 17 displays the heart rate of the electrocardiograph 22 and the pulse rate of the pulse oximeter 23 on the display unit 13. Step S17 is repeatedly executed until the measurement is completed, as shown in Fig. 3. Therefore, while the electrodes 221 of the electrocardiograph 22 and the measurement probes 231 of the pulse oximeter 23 are attached, the device main body 11 (control unit 17) displays the heart rate of the electrocardiograph 22 and the pulse rate of the pulse oximeter 23 on the display unit 13.

[0050] (Step S17-4) On the other hand, when biological information cannot be acquired, the control unit 17 displays the heart rate from the radar device 21 on the display unit 13. In other words, when the heart rate from the electrocardiograph 22 or the pulse rate from the pulse oximeter 23 cannot be acquired, the device main body 11 (control unit 17) switches from the heart rate from the electrocardiograph 22 or the pulse rate from the pulse oximeter 23 to the heart rate from the radar device 21 and displays them on the display unit 13.

[0051] In this manner, the biological information display device 10 can continuously and accurately measure the heart rate using the radar device 21, and can continuously and accurately display the heart rate.

[0052] The display may be switched by determining a display priority order. For example, first, the heart rate from the electrocardiograph 22 may be displayed, and if this cannot be obtained, the pulse rate from the pulse oximeter 23 may be displayed, and if this cannot be obtained, the heart rate from the radar device 21 may be displayed.

[0053] Furthermore, when the heart rate of the electrocardiograph 22 and the pulse rate of the pulse oximeter 23 can be measured together with the heart rate measured by the radar device 21, all of these may be displayed on the display unit 13. Furthermore, when the heart rate of the electrocardiograph 22 and the pulse rate of the pulse oximeter 23 become impossible to obtain and then become obtainable again by reattaching the device, these may be displayed on the display unit 13.

[0054] Furthermore, the reliability of the heart rate measured by the radar device 21 may be evaluated and displayed based on the heart rate measured by the electrocardiograph 22 or the pulse rate measured by the pulse oximeter 23. For example, the degree of agreement between the heart rate measured by the radar device 21 and the heart rate measured by the electrocardiograph 22 or the pulse rate measured by the pulse oximeter 23 may be calculated, and the degree of agreement may be displayed as the reliability. Furthermore, when both the heart rate measured by the electrocardiograph 22 and the pulse rate measured by the pulse oximeter 23 can be measured, if the degree of agreement between both of these and the heart rate measured by the radar device 21 is high, a higher reliability may be displayed.

[0055] (Step S17-5) The heart rate of patient P displayed on display unit 13 is monitored by control unit 17. Control unit 17 judges whether the displayed heart rate is within a predetermined range. If the displayed heart rate is within the predetermined range (YES), this subroutine ends and the process proceeds to step S18. On the other hand, if the displayed heart rate is not within the predetermined range (NO), that is, if the heart rate is below the predetermined range or exceeds the predetermined range, the process proceeds to step S17-6.

[0056] (Step S17-6) If the displayed heart rate is not within a predetermined range, an alarm is issued to the emergency personnel using the biological information display device 10 by using the notification unit 16 (e.g., a speaker or a buzzer). At this time, as described above, the control unit 17 may display a message indicating the alarm on the display unit 13. After issuing the alarm, the process proceeds to step S18.

[0057] Here, the heart rate acquired by the radar device 21 is stored as time-series data in the memory unit 14. At this time, when an electrocardiogram, oxygen saturation, and pulse rate can be measured by the electrocardiograph 22 and the pulse oximeter 23, the heart rate is associated with these and stored as time-series data in the memory unit 14.

[0058] At this time, if the face of the patient P can be photographed by the camera 24, the photographed image data may be associated with the photographed image data and stored in the storage unit 14 as time-series data.

[0059] The time series data stored in the storage unit 14 is configured to be output to the outside as necessary. For example, when the patient P arrives at the hospital to which the patient is to be transported, the time series data is transmitted to a computer or the like at the hospital to which the patient is to be transported via the communication unit 15 (the output unit in the present invention).

[0060] As described above, when the heart rate is not within a predetermined range, an alarm is issued using the notification unit 16, and at this time, the alarm may be transmitted to the destination hospital via the communication unit 15 together with the time series data. At this time, depending on the state of the patient P's heart rate (for example, an arrhythmia state such as tachycardia or bradycardia), for example, a marker is attached to the time when the tachycardia or bradycardia occurs, and an image of the patient P's face is attached in association with the marker. This allows the degree of urgency of the patient P to be communicated to the destination hospital, and the hospital can prepare to accept the patient P before the patient P arrives at the destination hospital, thereby shortening the start time of the treatment for the patient P.

[0061] Furthermore, when the storage unit 14 has a removable storage medium, the control unit 17 (the output unit in the present invention) may output the time-series data stored in the storage unit 14 to the removable storage medium. In this case, the removable storage medium is removed from the biological information display device 10 and handed over to the hospital to which the patient P is to be transported.

[0062] The time series data stored in the memory unit 14 may be transmitted to a server or the like via the communication unit 15. In this case, the hospital to which the patient P is transported can obtain the time series data of the transported patient P by accessing the server.

[0063] In this way, the time series data of the patient P who has been transported by ambulance can be passed to the hospital to which the patient P is transported, thereby shortening the time it takes for the patient P to begin treatment at the hospital to which the patient P is transported.

[0064] (Step S18) The control unit 17 judges whether or not the measurement has ended. For example, when the measurement ends when the ambulance crew presses an operation key for ending the measurement on the operation unit 12, the control unit 17 judges whether or not the measurement has ended based on whether or not the operation key has been pressed. When the measurement ends (YES), the series of processes ends, and when the measurement does not end (NO), the process returns to step S17.

[0065] By performing the series of processes described above, the biological information display device 10 can display an accurate heart rate using the radar device 21 even when the electrocardiograph 22 or the pulse oximeter 23 cannot continue to measure.

[0066] [Modification of the biological information display device] In the above embodiment, the biological information display device 10 is installed inside the ambulance vehicle 30, but may be installed indoors in a hospital, a private home, an elderly care facility, etc. In this case, the radar device 21 and the camera 24 may be installed, for example, on the ceiling of the room as long as they can obtain the biological information of the patient P from above. The biological information display device 10 may be made mobile by being installed on a trolley or the like. For example, if the trolley on which the biological information display device 10 is installed is placed on a visiting medical vehicle or the like, it can be carried to the visiting destination. In this case, the radar device 21 and the camera 24 may be installed on the trolley so that they can obtain the biological information of the patient P from above.

[0067] In addition, in the above embodiment, the bioinformation display device 10 uses a radar device 21, an electrocardiograph 22, a pulse oximeter 23, and a camera 24, but devices other than the electrocardiograph 22 and the pulse oximeter 23 may be used as long as they are capable of acquiring heart rate or information related to the heart rate.

[0068] In the above embodiment, the heart rate is acquired using the radar device 21, but respiration (respiratory rate) can also be acquired, and the biological information display device 10 may display the respiratory rate. In addition, the biological information display device 10 may evaluate the stress of the patient P based on the heart rate and respiratory rate, and may display the degree of stress.

[0069] Furthermore, since the above embodiment is provided with the camera 24, the position of not only the face of the patient P but also the chest of the patient P may be recognized by the camera 24. In this case, the direction of the radar device 21 may be adjusted so that the electromagnetic wave signal from the radar device 21 is radiated toward the chest of the patient P based on the position of the chest of the patient P recognized by the camera 24.

[0070] In the above embodiment, a signal having a period synchronized with or similar to the heart rate acquired by the electrocardiograph 22 or the pulse rate acquired by the pulse oximeter 23 is extracted from the reflected signal measured by the radar device 21, but a signal having the same or similar period and a phase difference may be extracted. For example, a phase difference Ph between the heart rate acquired by the electrocardiograph 22 or the pulse rate acquired by the pulse oximeter 23 and the heart rate obtained from the reflected signal measured by the radar device 21 is obtained in advance (see FIG. 5). This phase difference Ph is inherent between the electrocardiograph 22 or the pulse oximeter 23 and the radar device 21 in the biological information display device 10 (signal delay, etc.).

[0071] 5 can be obtained by extracting a signal at a position (or a nearby position) away from the heartbeat acquired by the electrocardiograph 22 by a phase difference Ph in the reflected signal S1 measured by the radar device 21, and the heartbeat can be obtained. In other words, when the heartbeat acquired by the electrocardiograph 22 and the pulse acquired by the pulse oximeter 23 have the same or approximately the same cycle as the heartbeat acquired by the electrocardiograph 22 but there is a phase difference Ph, the heartbeat signal Sh can be obtained by the above method.

[0072] It should be noted that the above-mentioned embodiments and modifications are merely examples of the implementation of the present invention, and the technical scope of the present invention should not be interpreted as being limited by them. In other words, the present invention can be implemented in various forms without departing from the gist or main characteristics of the present invention. [Explanation of symbols]

[0073] 10. Biometric information display device 11. Device body 12 Control section 13 Display section 14 Storage section 15 Communications Department 16. Notification Department 17 Control section 21 Radar equipment 22 Electrocardiograph 221 Electrode 23 Pulse oximeter 231 Measuring Probe 24 Camera 30 Emergency vehicles 31 Floor 32 Ceiling 33 Wall 40 Stretcher

Claims

1. A first acquisition unit that acquires a first biological signal including a first heartbeat signal of a heartbeat of the living body in a non-contact manner based on a reflected signal of the radiated electromagnetic wave signal reflected by the living body; A second acquisition unit that contacts the living body and acquires a second biological signal including a heartbeat of the living body or a second heartbeat signal related to the heartbeat; a display unit that extracts the second heartbeat signal from the second biological signal, extracts the first heartbeat signal having the same or similar cycle to the second heartbeat signal from the first biological signal, and displays a heartbeat based on the extracted first heartbeat signal; Equipped with Biometric information display device.

2. the display unit extracts, from the first biological signal, a signal having a predetermined phase difference with the second heartbeat signal as the first heartbeat signal, and displays a heartbeat based on the extracted first heartbeat signal. The biological information display device according to claim 1 .

3. The display unit displays a heartbeat based on the second heartbeat signal when the second acquisition unit is acquiring the second biological signal, and switches from displaying the heartbeat based on the second heartbeat signal to displaying the heartbeat based on the first heartbeat signal when the second acquisition unit is unable to acquire the second biological signal. The biological information display device according to claim 1 .

4. a notification unit that issues an alarm when the heart rate of the displayed heartbeat is not within a predetermined range; The biological information display device according to claim 1 .

5. an output unit that outputs biological information that can be obtained from the second biological signal to an outside in association with a heartbeat based on the first heartbeat signal; The biological information display device according to claim 1 .

6. The second acquisition unit is an electrocardiograph or a pulse oximeter. The biological information display device according to claim 1 .

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