Vital information monitoring device, vital information monitoring system, and program

Abstract

To enable monitoring of the presence / absence of a patient's abnormality to be performed in a situation where reliability is secured, even when a clinical threshold exceeding a mechanical threshold range is set.SOLUTION: A biological information monitoring apparatus 2 for monitoring the presence / absence of a patient's abnormality on the basis of a patient's biological information signal detected by detection means 1 comprises: calculation means for calculating a patient's biological information value on the basis of the biological information signal; storage means 22 for storing a mechanical threshold identifying a range of the biological information value for securing reliability of arithmetic by the calculation means; reception means 21 for receiving input of a clinical threshold for determining whether or not the biological information value is abnormal; and control means 21 for executing control for securing reliability of abnormality reporting on the basis of the mechanical threshold stored in the storage means 22 and the clinical threshold received by the reception means 21.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a biological information monitoring device, a biological information monitoring system, and a program. [Background technology]

[0002] There is a known technique for monitoring whether a vital sign value (e.g., respiratory rate or heart rate) based on a patient's vital sign signal exceeds a threshold, and notifying the patient that an abnormality has occurred if the value exceeds the threshold. For example, Patent Document 1 describes an abnormality reporting system in which a bioinformation calculation means calculates a respiratory rate as bioinformation, and further includes a condition determination table that stores a lower threshold and an upper threshold for the respiratory rate, and if the condition determination means determines that the respiratory rate is equal to or greater than the upper threshold, a report is made using a first criterion, and if the condition determination means determines that the respiratory rate is equal to or less than the lower threshold, a report is made using a second criterion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6556783 Summary of the Invention [Problem to be solved by the invention]

[0004] A threshold for determining whether or not a patient has an abnormality is called a clinical threshold, and is usually set by a doctor or a nurse under the doctor's instruction. On the other hand, devices that judge the presence or absence of abnormalities in patients based on clinical thresholds have a range of vital information values ​​that guarantee reliability (the accuracy of the device can be guaranteed). Many devices store a numerical value called a mechanical threshold that specifies this range. However, in many of the conventional abnormality reporting systems such as that described in Patent Document 1, the clinical threshold can be set beyond the range of the mechanical threshold. For this reason, the device may start monitoring without the doctor or nurse realizing that the clinical threshold that exceeds the range of the mechanical threshold (and therefore cannot guarantee reliability) has been set. Even if monitoring were to begin under such conditions, the abnormality notification provided by the device would be unreliable.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to make it possible to reliably monitor the presence or absence of abnormalities in a patient even when a clinical threshold is set that exceeds the range of the mechanical threshold. [Means for solving the problem]

[0006] In order to solve the above problems, a biological information monitoring device according to the present invention comprises: A vital sign monitoring device for monitoring the presence or absence of an abnormality in a patient based on a vital sign signal of the patient detected by a detection means, comprising: a calculation means for calculating a vital sign value of the patient based on the vital sign signal; 、 before A receiving means for receiving an input of a clinical threshold for determining whether or not the vital sign value is abnormal; a second receiving means for receiving an input of a mechanical threshold value that specifies a range of the biological information value for which the reliability of the calculation by the calculating means is guaranteed; a second determination means for determining whether the mechanical threshold value received by the second reception means is within a settable range; a setting means for setting the mechanical threshold value received by the second receiving means when the second determination means determines that the mechanical threshold value received by the second receiving means is within the settable range; The setting means sets and a control means for executing control to ensure reliability of an abnormality report based on the mechanical threshold value and the clinical threshold value received by the receiving means.

[0007] In addition, the biological information monitoring system according to the present invention comprises: A vital sign monitoring system for monitoring the presence or absence of an abnormality in a patient based on a vital sign signal of the patient, comprising: A detection means for detecting a vital sign signal of the patient; a calculation means for calculating a vital sign value of the patient based on the vital sign signal detected by the detection means; 、 Coming A receiving means for receiving an input of a floor threshold value; a second receiving means for receiving an input of a mechanical threshold value that specifies a range of the biological information value for which the reliability of the calculation by the calculating means is guaranteed; a determination means for determining whether the mechanical threshold value received by the second reception means is within a settable range; a setting means for setting the mechanical threshold value received by the second receiving means when the determination means determines that the mechanical threshold value received by the second receiving means is within the settable range; The setting means sets and a control means for executing control to ensure reliability of an abnormality report based on the mechanical threshold value and the clinical threshold value received by the receiving means.

[0008] In addition, the program according to the present invention is a control unit of a vital sign monitoring device for monitoring the presence or absence of an abnormality of a patient based on a vital sign signal of the patient detected by a detection means, A calculation process for calculating a vital sign value of the patient based on the vital sign signal; a reception process for receiving an input of a clinical threshold value for determining whether the biological information value is abnormal; a second reception process for receiving an input of a mechanical threshold value that specifies a range of the biometric information value for which the reliability of the calculation by the calculation process is guaranteed; a determination process for determining whether the mechanical threshold value received in the second reception process is within a settable range; a setting process for setting the mechanical threshold value accepted by the second reception process when the determination process determines that the mechanical threshold value accepted by the second reception process is within the settable range; The setting process and a control process that executes control to ensure the reliability of abnormality reporting based on a mechanical threshold value that specifies the range of the bioinformation value for which the reliability of the calculation in the calculation process is guaranteed, and the clinical threshold value accepted in the acceptance process. Effect of the Invention

[0009] According to the present invention, even if a clinical threshold value is set that exceeds the range of the mechanical threshold value, the presence or absence of abnormalities in a patient can be monitored in a reliable manner. [Brief description of the drawings]

[0010] [Figure 1] 1 is a block diagram showing a biological information monitoring system according to an embodiment of the present invention. [Diagram 2]2 is a block diagram showing a biological information monitoring device provided in the biological information monitoring system of FIG. 1. [Diagram 3] 3 is a flowchart showing an example of a flow of basic operations executed by the biological information monitoring device of FIG. 2. [Figure 4] 10 is a flowchart showing another example of the flow of the basic operation executed by the biological information monitoring device of FIG. 2. [Diagram 5] 10 is a flowchart showing another example of the flow of the basic operation executed by the biological information monitoring device of FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the following embodiments and drawings.

[0012] [1. Biometric monitoring system] First, a schematic configuration of a biological information monitoring system according to this embodiment (hereinafter, referred to as a system 100) will be described. FIG. 1 is a block diagram illustrating a system 100 .

[0013] The system 100 includes a sensor 1 and a biological information monitoring device (hereinafter, referred to as a monitoring device 2). The system 100 according to this embodiment also includes a monitor 3 and an input device 4. The devices 1 to 4 are capable of communicating with each other via wired or wireless communication.

[0014] (sensor) The sensor 1 according to this embodiment serves as a detection means for detecting a biological information signal of a patient. The sensor 1 includes a respiration sensor that detects the respiration of the patient, a heart rate sensor that detects the heart rate of the patient, and the like. The sensor 1 according to this embodiment continues to detect the biological information signal of the patient, and generates waveform data in which the horizontal axis represents time and the vertical axis represents the intensity of the biological information signal.

[0015] (Biometric monitoring device) The monitoring device 2 monitors the presence or absence of abnormalities in the patient based on the vital signs signal of the patient detected by the sensor 1. The monitoring device 2 according to this embodiment is adapted to continuously monitor the presence or absence of abnormalities in a patient based on waveform data of a vital sign signal. The monitoring device 2 is composed of a PC or a dedicated device. The monitoring device 2 will be described in detail later.

[0016] (monitor) The monitor 3 is composed of a monitor such as an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube), and is configured to display various images, various information, etc. in accordance with the instructions of a display signal input from the monitoring device 2.

[0017] (Input Device) The input device 4 is configured to be operable by the user, and includes a keyboard equipped with cursor keys, numeric input keys, various function keys, etc., a pointing device such as a mouse, a touch panel laminated on the surface of the monitor 3, etc. The input device 4 is adapted to output to the monitoring device 2 a control signal based on an operation performed by a user.

[0018] (Outline of operation of vital sign monitoring system) Although FIG. 1 illustrates a system 100 including a monitor 3 and an input device 4, the monitoring device 2 may include at least one of a display unit and an operation unit without including at least one of these devices 3 and 4.

[0019] [2. Biological Information Monitoring Device] Next, the monitoring device 2 included in the above system 100 will be described in detail. FIG. 2 is a block diagram showing a specific configuration of the monitoring device 2, and FIG.

[0020] (Configuration of vital sign monitoring device) The monitoring device 2 includes a control unit 21, a storage unit 22, and a communication unit .

[0021] The control unit 21 includes a CPU (Central Processing Unit), a RAM (Random Access Memory ) etc. The CPU of the control unit 21 reads out various programs stored in the memory unit 22 and expands them in the RAM, executes various processes according to the expanded programs, and provides centralized control of the operation of each part of the vital sign monitoring device 2.

[0022] The storage unit 22 is composed of a non-volatile semiconductor memory, a hard disk, or the like. Furthermore, the storage unit 22 stores programs for the control unit 21 to execute various processes, parameters necessary for executing the programs, and the like. The storage unit 22 may be capable of storing waveform data of the biological information signal received from the sensor 1.

[0023] Moreover, the memory unit 22 serves as a memory means for storing the mechanical threshold value. This "mechanical threshold" is a threshold that specifies the range of vital information values ​​(described in detail below) for which the reliability of calculations by the control unit 21 is guaranteed (the monitoring device 2 can guarantee that the values ​​are accurate). The mechanical thresholds in this embodiment include a first mechanical threshold which is the upper limit of the bioinformation value that can be accurately calculated, and a second mechanical threshold which is the lower limit of the bioinformation value that can be accurately calculated. The mechanical threshold is a limit value at which the calculation means can separate at least any of the components of breathing, heartbeat, body movement, and noise from the waveform data of the bioinformation signal detected by the sensor 1. Separation of various components from the waveform data can be performed based on the amplitude, frequency, shape, etc. of the waveform.

[0024] For example, if the sensor 1 is a respiration sensor, the mechanical threshold is preferably within the range of, for example, 6 to 35 bpm. The reason why the upper limit is set to 35 bpm is that if the patient's heart rate frequency is 35 bpm or higher, it becomes difficult to separate the respiration frequency as a waveform, since the respiration frequency is usually 40 bpm or lower. Therefore, by setting the mechanical threshold at 35 bpm or lower, it becomes relatively easy to separate the respiration frequency from the heart rate frequency. On the other hand, the reason why the lower limit is set to 6 bpm is that if a patient takes a breath of about 2 seconds at a frequency of less than 6 bpm, there will be about 10 seconds of silence between breaths, and the continuity of breathing will be almost nonexistent, making it difficult to separate from sporadic noise. Therefore, by setting the mechanical threshold to 6 bpm or more, it becomes relatively easy to separate from sporadic noise.

[0025] The communication unit 23 is composed of a wired communication module, a wireless communication module, etc., and is capable of transmitting and receiving various signals and data to and from other devices (sensor 1, monitor 3, input device 4, etc.) via wired or wireless communication.

[0026] (Operation of vital signs monitoring device) The control unit 21 of the monitoring device 2 configured in this manner has a function of executing a basic operation, for example, as shown in FIG. 3, when a predetermined condition is met. The satisfaction of a specified condition includes, for example, the power of the monitoring device 2 being turned on, an application being launched, a biometric information signal being received from another device (such as the sensor 1), a specified operation being performed on the input device 4, etc.

[0027] In this basic operation, the control unit 21 first executes a reception process (step S1). In this reception process, the control unit 21 receives an input of a clinical threshold value. This "clinical threshold" is a threshold for determining whether or not the vital sign value calculated by the control unit 21 is abnormal. The clinical thresholds according to this embodiment include a first clinical threshold which is an upper limit of normal biological information values, and a second clinical threshold which is a lower limit of normal biological information values. In the reception process according to this embodiment, the control unit 21 is configured to receive a numerical value corresponding to a control signal received from the input device 4 as a clinical threshold value. In the reception process according to this embodiment, the control unit 21 may cause the monitor 3 to display the received clinical threshold value. The control unit 21 functions as a reception unit by executing the reception process described above.

[0028] After receiving the input of the clinical threshold value, the control unit 21 executes a control process (step S2). In this control process, the control unit 21 executes control to ensure the reliability of the abnormality notification based on the mechanical thresholds stored in the memory unit 22 and the clinical thresholds received in the reception process.

[0029] In the control process, the control unit 21 first executes a determination process (step S21). In this determination process, the control unit 21 determines whether the clinical threshold value received in the reception process is within the range of the mechanical threshold value stored in the memory unit 22. As described above, the mechanical threshold in this embodiment has first and second mechanical thresholds, and the clinical threshold has first and second thresholds, so in the judgment process in this embodiment, the control unit 21 judges whether the first and second clinical thresholds are greater than or equal to the second mechanical threshold and less than or equal to the first mechanical threshold. In addition, if at least one of the first and second clinical thresholds is equal to or greater than the second mechanical threshold and equal to or less than the first mechanical threshold, the clinical threshold may be determined to be within the range of the mechanical thresholds.

[0030] In this determination process, when it is determined that the received clinical threshold value is not within the range of the mechanical threshold value, the control unit 21 executes a notification process (step S22). In the notification process, the control unit 21 causes the notification means to notify at least one of the fact that the accepted clinical threshold value is not within the range of the mechanical threshold value and the fact that resetting of the clinical threshold value is required. This "causing the notification means to notify" includes, for example, displaying on the monitor 3, lighting a lamp (not shown) in a predetermined manner, outputting sound from a speaker (not shown), and the like.

[0031] If it is determined in the determination process that the received clinical threshold value is not within the range of the mechanical threshold value, the control unit 21 may be configured to execute a change process (step S22A). When executing the change process, the control unit 21 changes the received clinical threshold value so that it falls within the range of the mechanical threshold value, for example, as shown in FIG. Furthermore, in the notification process, when the notification means is caused to notify that the accepted clinical threshold value is not within the range of the mechanical threshold value, the control unit 21 may be configured to execute a change process in parallel.

[0032] On the other hand, if it is determined in the determination process that the received clinical threshold is within the range of the mechanical threshold, the control unit 21 sets the received clinical threshold as shown in FIGS. 3 and 4 (step S3). The control unit 21 serves as a determination means and a control means by executing the control processes described above.

[0033] After executing the control for ensuring the reliability of the abnormality report, the control unit 21 executes a monitoring process (step S4). In this monitoring process, the control unit 21 first executes a calculation process (step S41). In this calculation process, the control unit 21 calculates the vital sign value of the patient based on the vital sign signal detected by a detection means for detecting the vital sign signal of the patient. The control unit 21 functions as a calculation means by executing the calculation process described above.

[0034] After calculating the biometric information value, the control unit 21 executes a determination process (step S42). In this determination process, the control unit 21 determines whether or not the calculated vital sign value is within the range of a set clinical threshold value.

[0035] In this determination process, when it is determined that the calculated vital sign value is not within the range of the set clinical threshold value (step S42; No), the control unit 21 causes the notification means to notify the patient that an abnormality has occurred (step S43). This "causing the reporting means to report" includes, for example, displaying on the monitor 3, lighting a lamp (not shown) in a predetermined manner, outputting sound from a speaker (not shown), and the like.

[0036] On the other hand, when it is determined in the determination process that the calculated vital sign value is within the range of the set clinical threshold value (step S32; Yes), the control unit 21 returns to the process of step S32 after a predetermined time has elapsed. In this way, the monitoring process is repeated (monitoring of the patient is continued) until an abnormality occurs in the patient.

[0037] In the above basic operation, before executing the reception process (step S1), for example, as shown in FIG. 5, a second reception process and a second control process (steps S5 and S6) may be executed.

[0038] When the second reception process is executed, the control unit 21 receives an input of a mechanical threshold value. In the second reception process according to the present embodiment, the control unit 21 receives a numerical value corresponding to a control signal received from the input device 4 as a mechanical threshold value.

[0039] Moreover, in the second control process after accepting the input of the mechanical threshold value, the control unit 21 executes a second determination process (step S61). In the second determination process, the control unit 21 determines whether the mechanical threshold value received in the second reception process is within the settable range stored in the storage unit 22 or not.

[0040] In the second determination process, when it is determined that the received mechanical threshold value is not within the settable range, the control unit 21 executes at least one of a second notification process and a second change process (step S62). When the second notification process is executed, the control unit 21 causes the notification means to notify the user that the received mechanical threshold value is not within the settable range, or to request that the mechanical threshold value be reset. On the other hand, when the second change process is executed, the control unit 21 changes the received mechanical threshold value so that it falls within the settable range.

[0041] On the other hand, if it is determined in the second determination process that the received mechanical threshold value is within the settable range, the control unit 21 sets the received mechanical threshold value (step S7) and proceeds to the process of step S1.

[0042] 3. Effects The monitoring device 2 and the system 100 equipped with this monitoring device 2 as described above are configured to execute control processing based on the mechanical thresholds stored in the memory unit 22 and the clinical thresholds received in the reception processing.

[0043] In this control process, if the notification means notifies the user that the received clinical threshold is not within the range of the mechanical threshold, the user (doctor or nurse) can notice that the input clinical threshold is not within the range of the mechanical threshold. Therefore, by being aware of the possibility that the vital sign value or abnormality notification, whose reliability is not guaranteed, may not be accurate, the user can provide accurate treatment to the patient. Furthermore, if the notification means notifies the user of a request to reset the clinical threshold in the control process, in many cases, the user can notice that the input clinical threshold is not within the range of the mechanical threshold, and the user is more likely to change the clinical threshold, thereby reducing the possibility that a bioinformation value with unguaranteed reliability is calculated or that an abnormality is notified. Furthermore, by changing the received clinical threshold value in the control process so that it falls within the range of the mechanical threshold value, it is possible to prevent calculation of bioinformation values ​​whose reliability is not guaranteed or reporting of abnormalities, without the doctor or nurse being particularly conscious of it.

[0044] Therefore, according to the monitoring device 2 or the system 100, even if a clinical threshold value that exceeds the range of the mechanical threshold value is set, the presence or absence of abnormalities in the patient can be monitored in a reliable manner.

[0045] [4. Other] It goes without saying that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

[0046] For example, in the above embodiment, the monitoring device 2 is configured to perform judgment processing, notification processing, change processing, etc., but these processes may also be performed by other devices independent of the monitoring device 2. Furthermore, in the above embodiment, the sensor 1 and the monitoring device 2 are separate, but they may be integrated.

[0047] In the above description, the computer-readable medium of the program according to the present invention Although the above discloses examples in which a hard disk or a semiconductor non-volatile memory is used as a computer readable medium, the present invention is not limited to these examples. As other computer readable media, a portable recording medium such as a CD-ROM can be used. Furthermore, a carrier wave may also be used as a medium for providing data of the program according to the present invention via a communication line. [Explanation of symbols]

[0048] 100 Biometric monitoring system 1. Sensor (detection means) 2. Biometric monitoring device 21 Control unit (reception means, control means) 22 Storage unit (storage means) 23 Communications Department 3 Monitors 4 Input Devices

Claims

1. A vital sign monitoring device for monitoring the presence or absence of an abnormality in a patient based on a vital sign signal of the patient detected by a detection means, comprising: a calculation means for calculating a vital sign value of the patient based on the vital sign signal; a receiving means for receiving an input of a clinical threshold value for determining whether the vital sign value is abnormal; a second receiving means for receiving an input of a mechanical threshold value that specifies a range of the biological information value for which the reliability of the calculation by the calculating means is guaranteed; a second determination means for determining whether the mechanical threshold value received by the second reception means is within a settable range; a setting means for setting the mechanical threshold value received by the second receiving means when the second determination means determines that the mechanical threshold value received by the second receiving means is within the settable range; and a control means for executing control to ensure reliability of an abnormality report based on the mechanical threshold value set by the setting means and the clinical threshold value received by the receiving means.

2. 2. The biological information monitoring device according to claim 1, further comprising a first determination means for determining whether or not the clinical threshold value received by the reception means is within a range of the mechanical threshold value.

3. 3. The biological information monitoring device according to claim 2, wherein, when the first judgment means judges that the clinical threshold value accepted by the acceptance means is not within the range of the mechanical threshold value, the control means controls the notification means to notify that fact.

4. The biological information monitoring device of claim 2 or claim 3, wherein when the first judgment means judges that the accepted clinical threshold is not within the range of the mechanical threshold, the control means changes the clinical threshold accepted by the acceptance means so that it is within the range of the mechanical threshold.

5. The biological information monitoring device according to claim 2 , wherein the control means sets the received clinical threshold value when the first judgment means judges that the received clinical threshold value is within a range of the mechanical threshold value.

6. the detection means is a respiratory sensor; The biological information monitoring device according to any one of claims 1 to 5, wherein the mechanical threshold is within a range of 6 to 35 bpm.

7. 6. The biological information monitoring device according to claim 1, wherein the mechanical threshold is a limit value at which the calculation means is able to separate at least any one of a breathing component, a heart rate component, a body movement component, and a noise component from the waveform data of the biological information signal detected by the detection means.

8. A vital sign monitoring system for monitoring the presence or absence of an abnormality in a patient based on a vital sign signal of the patient, comprising: A detection means for detecting a vital sign signal of the patient; a calculation means for calculating a vital sign value of the patient based on the vital sign signal detected by the detection means; A receiving means for receiving an input of a clinical threshold value; a second receiving means for receiving an input of a mechanical threshold value that specifies a range of the biological information value for which the reliability of the calculation by the calculating means is guaranteed; a determination means for determining whether the mechanical threshold value received by the second reception means is within a settable range; a setting means for setting the mechanical threshold value received by the second receiving means when the determination means determines that the mechanical threshold value received by the second receiving means is within the settable range; and a control means for executing control to ensure reliability of abnormality reports based on the mechanical threshold value set by the setting means and the clinical threshold value received by the receiving means.

9. a control unit of a vital sign monitoring device for monitoring the presence or absence of an abnormality of a patient based on a vital sign signal of the patient detected by a detection means, A calculation process for calculating a vital sign value of the patient based on the vital sign signal; a reception process for receiving an input of a clinical threshold value for determining whether the biological information value is abnormal; a second reception process for receiving an input of a mechanical threshold value that specifies a range of the biometric information value for which the reliability of the calculation by the calculation process is guaranteed; a determination process for determining whether the mechanical threshold value received in the second reception process is within a settable range; a setting process for setting the mechanical threshold value accepted by the second reception process when the determination process determines that the mechanical threshold value accepted by the second reception process is within the settable range; a control process that executes control to ensure the reliability of an abnormality report based on a mechanical threshold value that specifies a range of the bioinformation value for which the reliability of the calculation in the calculation process is ensured, which is set by the setting process, and the clinical threshold value that is accepted in the acceptance process.

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