Information generation device, information generation method, computer program, and non-transitory computer-readable medium

Abstract

To objectively grasp the depth of the respiration of a subject.SOLUTION: An information generation device 1 comprises an acquisition unit 2 and a control unit 5. The acquisition unit 2 is configured to acquire respiration waveform data regarding the respiratory pressure of a subject P. The control unit 5 is configured to compare preset respiration reference waveform data with the respiration waveform data acquired by the acquisition unit 2 and thereby generate respiration depth information indicative of the depth of respiration in the respiration waveform data with respect to the respiration reference waveform data.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an information generating device, an information generating method, a computer program for causing the device to execute the method, and a non-transitory computer-readable medium having the computer program recorded thereon. [Background technology]

[0002] Patent Document 1 discloses a biometric information processing device that performs real-time analysis of the measurement results of nasal pressure respiratory air and displays the analysis results on a display. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-201725 Summary of the Invention [Problem to be solved by the invention]

[0004] The respiratory condition of a subject is generally determined based on the rate and depth of breathing. While the rate of breathing can be objectively determined from the respiratory rate, the depth of breathing is subjectively determined by medical professionals by visually observing the respiratory waveform, making it difficult to objectively determine. The biometric information processing device disclosed in Patent Document 1 can calculate the respiratory rate of the subject, so medical professionals can objectively determine the rate of breathing by using such a biometric information processing device, but cannot objectively determine the depth of breathing. In this respect, conventional biometric information processing devices have room for improvement.

[0005] The present invention aims to provide an information generating device and an information generating method that can objectively grasp the depth of breathing of a subject, a computer program for causing the device to execute the method, and a non-transitory computer-readable medium on which the computer program is recorded. [Means for solving the problem]

[0006] In order to achieve the above object, an information generating device according to one aspect includes: The device includes: an acquisition unit configured to acquire respiratory waveform data relating to the subject's respiratory pressure; and a control unit configured to generate respiratory depth information indicating the respiratory depth of the respiratory waveform data relative to the respiratory reference waveform data by comparing the respiratory waveform data acquired by the acquisition unit with preset respiratory reference waveform data.

[0007] Further, an information generating method according to one aspect for achieving the above object includes: acquiring respiratory waveform data relating to the subject's respiratory pressure; The information generating device executes a step of comparing the acquired respiratory waveform data with preset respiratory reference waveform data to generate respiratory depth information indicating the respiratory depth of the respiratory waveform data relative to the respiratory reference waveform data.

[0008] Furthermore, a computer program according to one aspect for achieving the above object comprises: a function for acquiring respiratory waveform data relating to the subject's respiratory pressure; The computer is caused to realize a function of generating breathing depth information indicating the breathing depth of the breathing waveform data relative to the breathing reference waveform data by comparing the acquired breathing waveform data with preset breathing reference waveform data.

[0009] In addition, a non-transitory computer-readable medium according to one aspect for achieving the above object includes: The computer program is stored.

[0010] According to the information generating device, information generating method, computer program, and non-transitory computer-readable medium having the above configurations, the respiration depth information is generated by comparing the respiration reference waveform data, which serves as a standard for determining the respiration depth of the subject, with the respiration waveform data acquired from the subject, and is therefore information that objectively indicates the respiration depth of the subject. Therefore, for example, by visually checking the display screen based on the respiration depth information, a medical professional can determine the respiration depth based on the respiration depth information, which serves as an objective indicator, rather than determining the respiration depth based on personal experience, as in the past. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide an information generating device that can objectively grasp the depth of breathing of a subject, an information generating method, a computer program for causing the device to execute the method, and a non-transitory computer-readable medium on which the computer program is recorded. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a functional block diagram of an information generating device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a flowchart of an information generating method according to one embodiment of the present invention. [Figure 3] FIG. 3 shows an example of a biological waveform including a respiratory waveform of a subject. [Figure 4] FIG. 4 shows an example of a reference waveform of a subject's breathing. [Figure 5] FIG. 5 is an example of a display screen according to one embodiment of the present invention. [Figure 6] FIG. 6 shows an example of a respiratory waveform of a subject. [Figure 7] FIG. 7 is an example of a display screen according to one embodiment of the present invention. [Figure 8] FIG. 8 is an example of a display screen according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] An example of an embodiment of the present invention will be described below with reference to the drawings. For the sake of convenience, the description of this embodiment will refer to the "left-right direction" and "up-down direction" as appropriate. These directions are relative directions set in the waveforms illustrated in FIGS. 4 and 6, or in the display unit 7 illustrated in FIGS. 5, 7, and 8.

[0014] (First embodiment) Fig. 1 is a functional block diagram of an information generating device 1 according to one embodiment of the present invention. The information generating device 1 is, for example, a bedside monitor. As illustrated in Fig. 1, the information generating device 1 includes an acquisition unit 2, an operation unit 3, a storage unit 4, a control unit 5, an output interface 6, a display unit 7, and a notification unit 8. These are connected to each other via a bus 9 so as to be able to communicate with each other.

[0015] The acquisition unit 2 is configured to acquire biological information from the subject P, including respiratory waveform data related to the respiratory pressure of the subject P. The respiratory waveform data is based on a biological signal corresponding to respiratory air from at least one of the mouth and nose of the subject P, detected by the pressure sensor 10. The biological information acquired by the acquisition unit 2 may include electrocardiogram waveform data, transcutaneous arterial oxygen saturation data, etc., detected by various sensors. The biological information acquired by the acquisition unit 2 is transmitted to the memory unit 4 and the control unit 5.

[0016] The operation unit 3 is configured to accept input operations by a person (e.g., a medical professional) operating the information generating device 1, and to generate instruction signals corresponding to the input operations. The operation unit 3 is, for example, a touch panel placed over the display unit 7, operation buttons attached to the housing of the information generating device 1, etc. The operation unit 3 accepts various input operations, etc., generates instruction signals corresponding to the input operations, and transmits them to the control unit 5.

[0017] The storage unit 4 is, for example, a hard disk drive (HDD) or a solid state drive (SSD). The storage unit 4 stores the biometric information acquired by the acquisition unit 2, the information input via the operation unit 3, the information generated by the control unit 5, and the like.

[0018] The control unit 5 includes a memory 51 and a processor 52. The memory 51 is configured, for example, from a ROM (Read Only Memory) in which various programs and the like are stored, and a RAM (Random Access Memory) having multiple work areas in which various programs and the like executed by the processor 52 are stored. The processor 52 is, for example, a CPU (Central Processing Unit), and is configured to load a specified program from the various programs stored in the ROM onto the RAM and execute various processes in cooperation with the RAM.

[0019] The control unit 5 is configured to generate respiration depth information, which is information related to the depth of respiration. The generated respiration depth information can be transmitted to the storage unit 4. The respiration depth information includes classification information according to the classified state of the depth of respiration of the subject P, and numerical information that numerically represents the state of the depth of respiration of the subject P.

[0020] The control unit 5 is configured to determine whether it is necessary to notify the state of the depth of breathing of the subject P based on the depth of breathing information. The control unit 5 may be configured to determine whether it is necessary to notify the state of the depth of breathing of the subject P not only using the depth of breathing information but also, for example, aggregate information, which will be described later. When it is determined that it is necessary to notify the state of the depth of breathing of the subject P, the control unit 5 is configured to generate a notification signal for notifying a medical professional or the like of the state of the depth of breathing of the subject P. The generated notification signal is transmitted to the external device 20 via the notification unit 8 or the output interface 6.

[0021] The control unit 5 is configured to generate aggregated information by aggregating multiple pieces of breathing depth information over a predetermined period of time. The length of the predetermined period of time is arbitrarily set by a medical professional or the like. The predetermined period of time is, for example, 10 minutes. The generated aggregated information can be transmitted to the storage unit 4.

[0022] The control unit 5 is configured to generate display data for displaying the respiratory waveform data and respiratory depth information on the display unit 7 or a display unit provided in the external device 20. The generated display data is sent to the output interface 6 or the display unit 7.

[0023] The output interface 6 is configured to output an output signal OS corresponding to information transmitted to the output interface 6. The output signal OS may be transmitted to an external device 20. The output interface 6 may optionally include circuitry to convert the output data into an output signal OS that can be processed by the external device 20.

[0024] The external device 20 is configured to notify various information to a medical professional or the like by at least one of visual notification, auditory notification, and tactile notification. The external device 20 is, for example, a tablet terminal, a smartphone, or the like.

[0025] The display unit 7 is configured to display a display screen corresponding to the display data received from the control unit 5. The display unit 7 is, for example, a touch screen display such as a liquid crystal display or an organic EL display. The display unit 7 may display not only the respiratory waveform data and respiratory depth information, but also other information. Such other information may include, for example, information related to percutaneous arterial oxygen saturation, heart rate, electrocardiogram, etc.

[0026] The notification unit 8 is configured to notify the state of the depth of breathing of the subject P based on the notification signal received from the control unit 5. The notification manner by the notification unit 8 is the same as the notification manner by the external device 20.

[0027] Next, an information generating method used in this embodiment will be described with reference to FIGS. 2 to 7. FIG. 2 is a flowchart of the information generating method according to this embodiment. As illustrated in FIG. 2, the acquisition unit 2 acquires biometric information from a subject P before surgery (STEP 01). For example, when a medical professional operates the operation unit 3 to acquire biometric information from the subject P, an instruction signal corresponding to the operation is transmitted from the operation unit 3 to the control unit 5. The control unit 5 controls the acquisition unit 2 to acquire respiratory waveform data from the subject P based on the instruction signal. In this embodiment, when a biometric waveform based on the biometric information acquired from the subject P in STEP 01 is displayed on the display unit 7, the biometric waveform shown in FIG. 3 is displayed on the display unit 7. The biometric waveform includes a respiratory waveform 71, a percutaneous arterial oxygen saturation waveform 72, and an electrocardiogram waveform 73. In the example illustrated in FIG. 3, the respiratory rate is 12, the percutaneous arterial oxygen saturation value is 98, and the heart rate is 80. 3, the reference numeral 80 indicates that the respiratory waveform 71, the percutaneous arterial oxygen saturation waveform 72, and the electrocardiogram waveform 73 are in phase. When the acquisition unit 2 acquires the biological information from the subject P, the acquisition unit 2 transmits the acquired biological information to the storage unit 4.

[0028] In this embodiment, the subject P undergoes surgery after STEP 01, and an anesthetic is administered to the subject P during the surgery. If the anesthetic administered during the surgery remains in the body of the subject P, the remaining anesthetic may cause the subject P to breathe shallower than normal after the surgery. The remaining anesthetic may cause shallow breathing, particularly during sleep. Therefore, as illustrated in FIG. 2 , the acquisition unit 2 acquires biometric information from the subject P after the surgery shortly after the end of the surgery (STEP 02). The process of acquiring biometric information in STEP 02 is the same as the process of acquiring biometric information in STEP 01. When a respiratory waveform 75 (an example of a second respiratory waveform) based on the respiratory waveform data acquired in STEP 02 is displayed on the display unit 7, a waveform such as that shown in FIG. 5 is displayed on the display unit 7. The respiratory waveform data includes exhalation waveform data of the subject P (e.g., data relating to the exhalation volume and exhalation detection time of the subject P) and inhalation waveform data of the subject P (e.g., data relating to the inhalation volume and inhalation detection time of the subject P).

[0029] As illustrated in FIG. 2, when biological information is acquired from the post-operative subject P, the control unit 5 determines whether respiratory waveform data previously acquired from the subject P is stored in the storage unit 4 (STEP 03). In this embodiment, since respiratory waveform data previously acquired from the subject P is stored in the storage unit 4 (YES in STEP 03), the control unit 5 sets respiratory reference waveform data based on the previously acquired respiratory waveform data (STEP 04). The respiratory reference waveform data may be automatically set by the control unit 5 or may be set by a medical professional through input operation into the operation unit 3. Furthermore, because the subject's normal respiratory state (depth of breathing) is normally known before surgery, the control unit 5 sets reference respiratory waveform data (respiratory reference waveform data) from the respiratory waveform data acquired from the subject P before surgery. Furthermore, when a respiratory reference waveform 74 (an example of a first respiratory waveform) based on the respiratory reference waveform data set in STEP 04 is displayed on the display unit 7, the waveform illustrated in FIG. 4 is displayed on the display unit 7. The respiratory reference waveform 74 is a waveform indicating the standard respiratory pressure level of the subject P.

[0030] 2, if the storage unit 4 does not have respiratory waveform data previously acquired from the subject P (NO in STEP 03), the control unit 5 acquires attribute information of the subject P stored in the storage unit 4 (STEP 05). The attribute information includes, for example, age information, gender information, chronic disease information, and past medical condition information.

[0031] After acquiring the attribute information of the subject P, the control unit 5 sets the reference respiratory waveform data based on the acquired attribute information (STEP 06). In this case, the control unit 5 sets the reference respiratory waveform data based on, for example, statistical respiratory waveform data acquired from a plurality of other people who have attribute information identical to or similar to the attribute information of the subject P. The other people may be, for example, subjects who are close in age to the subject P or subjects who have the same chronic illness as the subject P.

[0032] After setting the reference respiratory waveform data, the control unit 5 generates respiratory depth information based on the reference respiratory waveform data and the respiratory waveform data acquired from the post-operative subject P (STEP 07).

[0033] 4 and 5, the process performed by the control unit 5 in STEP 07 will be described in detail. As illustrated in Fig. 4, the control unit 5 determines a first amplitude A1 (an example of a first value) indicating the respiratory pressure based on the reference respiratory waveform data, based on the peak inspiration pressure 74a and the peak expiration pressure 74b in the reference respiratory waveform 74. The first amplitude A1 is the difference between the height of the peak inspiration pressure 74a and the height of the peak expiration pressure 74b.

[0034] 5, the respiratory waveform 75 includes a plurality of unit respiratory waveforms 751 to 753. A unit respiratory waveform is a respiratory waveform corresponding to one breath taken by the subject P. The control unit 5 determines second amplitudes A21 to A23 (an example of a second value) indicating the respiratory pressure based on the respiratory waveform data, based on the inhalation peak pressures 751a to 753a and the exhalation peak pressures 751b to 753b, respectively.

[0035] The control unit 5 calculates relative values ​​X1 to X3 (an example of numerical information) that indicate the relative magnitudes of the second amplitudes A21 to A23 with respect to the first amplitude A1. For example, the control unit 5 calculates the relative value X1 based on the following formula (1): X1=A21 / A1*100(%) (1) In this embodiment, the magnitude of the second amplitude A21 is 3 / 4 of the magnitude of the first amplitude A1, so the relative value X1 is 75%.

[0036] The relative values ​​X2 to X3 are calculated in the same manner as the relative value X1. That is, the control unit 5 generates the relative values ​​X1 to X3 indicating the relative magnitudes of the second amplitudes A21 to A23 to the first amplitude A1 by comparing the first amplitude A1 of the respiratory reference waveform 74 included in the respiratory reference waveform data with the second amplitudes A21 to A23 of the respiratory waveform 75 included in the respiratory waveform data acquired by the acquisition unit 2. The relative values ​​X1 to X3 are generated each time the unit respiratory waveforms 751 to 753 are acquired.

[0037] The control unit 5 classifies the state of the depth of breathing of the subject P based on the generated relative values ​​X1 to X3 and the classification standard information stored in the storage unit 4. The classification standard information is information for setting standards used to classify the state of the depth of breathing. The state of the depth of breathing can be classified into three states, for example, "normal," "caution," and "danger." In this case, the classification standard information is, for example, a threshold value for defining the boundaries (ranges) of the three classifications. In this embodiment, the control unit 5 classifies the state of the depth of breathing of the subject P as "danger" when the relative value is 19% or less, as "caution" when the relative value is 20% or more and 49% or less, and as "normal" when the relative value is 50% or more.

[0038] 5, the relative values ​​X1 to X3 are equal to or greater than 50%, so the control unit 5 classifies the breathing depth of the subject P corresponding to the unit breathing waveforms 751 to 753 as "normal." After classifying the breathing depth of the subject P corresponding to the unit breathing waveforms 751 to 753, the control unit 5 generates classification information according to the classified breathing depth of the subject P. In this way, the control unit 5 generates breathing depth information including numerical information and classification information.

[0039] Returning to FIG. 2, the processing from STEP 08 onward will be described. In STEP 08, the control unit 5 determines whether a predetermined time has elapsed since the acquisition unit 2 began acquiring post-operative respiratory waveform data from the subject P. In this embodiment, the predetermined time is assumed to be 10 minutes. For example, if the acquisition unit 2 began acquiring post-operative respiratory waveform data from the subject P at 18:00 and the current time is 18:02, the control unit 5 determines that the predetermined time (10 minutes) has not elapsed since 18:00 (NO in STEP 08). In this case, the control unit 5 generates display data for displaying the respiratory waveform data and respiratory depth information on the display unit 7 or a display unit provided in the external device 20 (STEP 09).

[0040] The control unit 5 is configured to generate, as display data, either first display data in which the inspiratory pressure is higher than the expiratory pressure in the respiratory waveform 75, or second display data in which the expiratory pressure is higher than the inspiratory pressure in the respiratory waveform 75. For example, when a medical professional operates the operation unit 3 to cause the control unit 5 to generate the first display data, the operation unit 3 generates an instruction signal corresponding to the input operation, and the control unit 5 generates the first display data based on the instruction signal. As illustrated in FIG. 5 , in this embodiment, the inspiratory pressure is higher than the expiratory pressure in the respiratory waveform 75. Therefore, the control unit 5 generates the first display data. The generated first display data is transmitted to the output interface 6 or the display unit 7.

[0041] When the control unit 5 generates the display data, it controls the display unit 7 or a display unit included in the external device 20 to display a display screen corresponding to the generated display data (STEP 10). In this embodiment, the control unit 5 transmits first display data to the display unit 7. When the display unit 7 receives the first display data from the control unit 5, the display unit 7 displays a display screen corresponding to the received first display data. After STEP 10 is executed, the process returns to STEP 07.

[0042] Here, with reference to FIG. 5, a display screen displayed on the display unit 7 at 18:02 will be described. At 18:02, the display unit 7 displays the display screen shown in FIG. 5. As shown in FIG. 5, the display unit 7 displays a respiratory reference waveform 74, a respiratory waveform 75, a percutaneous arterial oxygen saturation waveform 76, and an electrocardiogram waveform 77. The respiratory reference waveform 74, the respiratory waveform 75, the percutaneous arterial oxygen saturation waveform 76, and the electrocardiogram waveform 77 are displayed side by side in the vertical direction. These waveforms are arranged in the following order from top to bottom: respiratory reference waveform 74, electrocardiogram waveform 77, percutaneous arterial oxygen saturation waveform 76, and respiratory waveform 75. In other words, the respiratory reference waveform 74 is displayed above the respiratory waveform 75, the percutaneous arterial oxygen saturation waveform 76, and the electrocardiogram waveform 77, and the respiratory waveform 75 is displayed below the respiratory reference waveform 74, the percutaneous arterial oxygen saturation waveform 76, and the electrocardiogram waveform 77. The horizontal length of the respiratory reference waveform is approximately 2 / 5 of the horizontal length of the respiratory waveform. The respiratory rate, percutaneous arterial oxygen saturation value, and heart rate are displayed near the left side of the respiratory waveform 75, percutaneous arterial oxygen saturation waveform 76, and electrocardiogram waveform 77, respectively. It goes without saying that the display positions of the respiratory reference waveform 74, respiratory waveform 75, percutaneous arterial oxygen saturation waveform 76, and electrocardiogram waveform 77 are not limited to this example.

[0043] Markers M1 to M3 as classification information and relative values ​​X1 to X3 are displayed near the peaks of each unit respiratory waveform 751 to 753. The markers M1 to M3 are hatched to indicate the classified state of the depth of breathing of the subject P. Since the relative values ​​X1 to X3 corresponding to the unit respiratory waveforms 751 to 753 are all 50% or higher, the state of the depth of breathing of the subject P corresponding to the unit respiratory waveforms 751 to 753 is all "normal." Therefore, the markers M1 to M3 are hatched (with horizontal lines) to indicate "normal." The relative values ​​X1 to X3 are displayed near the left side of the markers M1 to M3.

[0044] Next, with reference to FIG. 6, the process performed by the control unit 5 in STEP 07 after STEP 10 is executed will be described in detail. FIG. 6 shows how the breathing of the subject P gradually becomes shallower due to the anesthetic. The control unit 5 generates relative values ​​X4 to X9 each time unit respiratory waveforms 754 to 759 are acquired, using the same principle as that used to generate relative values ​​X1 to X3. After generating relative values ​​X4 to X9, the control unit 5 classifies the state of the depth of breathing of the subject P corresponding to the unit respiratory waveforms 754 to 759 based on the relative values ​​X4 to X9 and generates classification information corresponding to the classification. In the example shown in FIG. 6, since the relative value X4 is 50% or greater, the control unit 5 classifies the state of the depth of breathing of the subject P corresponding to the unit respiratory waveform 754 as “normal.” Near the right side of the relative value X4, there is a marker M4 with hatching (horizontal hatching) indicating “normal.” Since the relative values ​​X5 to X7 are between 20% and 49%, the control unit 5 classifies the state of the depth of breathing of the subject P corresponding to the unit respiratory waveforms 755 to 757 as "Caution." Near the right side of the relative values ​​X5 to X7 are markers M5 to M7 with hatching (vertical hatching) indicating "Caution." Since the relative values ​​X8 to X9 are less than 19%, the control unit 5 classifies the state of the depth of breathing of the subject P corresponding to the unit respiratory waveforms 758 to 759 as "Danger." Near the right side of the relative values ​​X8 to X9 are markers M8 to M9 with hatching (diagonal hatching) indicating "Danger." In this way, the control unit 5 continues to generate respiratory depth information until a predetermined time has elapsed since the acquisition unit 2 began acquiring post-operative respiratory waveform data from the subject P.

[0045] Returning to Fig. 2, STEP 11 to STEP 13 will be described. For example, if the current time is 18:10, the control unit 5 determines that a predetermined time (10 minutes) has passed since the time (18:00) when the acquisition unit 2 started to acquire post-operative respiratory waveform data from the subject P (YES in STEP 08). In this case, the control unit 5 generates aggregate information on the respiratory depth of the subject P at the predetermined time based on a plurality of pieces of respiratory depth information continuously generated during the 10 minutes since the acquisition of post-operative respiratory waveform data from the subject P started (STEP 11).

[0046] 6, the control unit 5 generates average respiration depth information and cumulative count information as aggregate information. The average respiration depth information is the average value of the relative magnitude of the second amplitude with respect to the first amplitude A1 over a predetermined time period, for example, the average value of the relative magnitudes (relative values ​​X1 to X9) of the second amplitudes A21 to A29 with respect to the first amplitude A1 over a predetermined time period. The cumulative count information is information indicating the cumulative number of occurrences for each classification (i.e., danger, caution, normal) related to the state of respiration depth.

[0047] In this embodiment, the average respiration depth information is the average value of the relative values ​​X1 to X9. Since the average value of the relative values ​​X1 to X9 is 46%, in this embodiment, this average value (46%) is the average respiration depth information. However, the average respiration depth information is not limited to numerical information such as an average value, and may be other information such as a level or character representing the state of respiration depth (e.g., normal). The control unit 5 classifies the state of respiration depth of the subject P for each unit respiration waveform based on the acquired respiration waveform data and the reference respiration waveform data, and tallying up the number of times each state has been classified. Note that in this embodiment, identification marks S1 to S3 are used as identification marks representing classifications of the state of respiration depth. The identification marks S1 to S3 are hatched to represent the state of respiration depth of the subject P using the same criteria as the markers M1 to M9. The numbers displayed to the right of the identification marks S1 to S3 indicate the cumulative number of times each state has been classified. That is, the control unit 5 counts up the fact that the state of the depth of breathing of the subject P based on the respiratory waveform data acquired within 10 minutes after the start of acquisition of respiratory waveform data from the post-operative subject P was classified as "normal" 61 times, "caution" 45 times, and "danger" twice. The control unit 5 generates cumulative count information indicating the counting results.

[0048] 2, when the aggregated information is generated, the control unit 5 generates display data for displaying the respiratory waveform data, respiratory depth information, and aggregated information on the display unit 7 or a display unit provided in the external device 20 (STEP 12). Note that the control unit 5 generates first display data in STEP 12 as well, as in STEP 09. In this embodiment, the generated first display data is transmitted to the display unit 7.

[0049] When the control unit 5 transmits the generated first display data to the display unit 7, a display screen corresponding to the first display data is displayed on the display unit 7, similar to STEP 10 (STEP 13).

[0050] Here, with reference to FIG. 7, the display screen displayed on the display unit 7 at 18:10 will be described. However, for the sake of simplicity, descriptions of parts similar to those of the display screen illustrated in FIG. 5 will be omitted. After a predetermined time (10 minutes) has elapsed, the aggregated information is updated based on multiple pieces of respiration depth information generated in the last 10 minutes. At 18:10, the display screen illustrated in FIG. 7 is displayed on the display unit 7. The display screen illustrated in FIG. 7 differs from the display screen illustrated in FIG. 5 in that average respiration depth information is displayed adjacent to the left of the respiration rate ("8" in FIG. 7) and in that identification markers S1 to S3 and cumulative count information are displayed adjacent to the left of the average respiration depth information.

[0051] Markers M7-M9 (classification information) and relative values ​​X7-X9 (numerical information) are displayed near the peaks of each unit respiratory waveform 757-759. Markers M7-M9 are hatched as described above. That is, since the relative value X7 corresponding to unit respiratory waveform 757 is 20%, marker M7 is hatched with vertical lines. Furthermore, since the relative value X8 corresponding to unit respiratory waveform 758 is 16%, and the relative value X9 corresponding to unit respiratory waveform 759 is 15%, markers M8-M9 are hatched with diagonal lines.

[0052] Next, the function of notifying the state of the depth of respiration of the subject P will be described. When the control unit 5 determines that the state of the depth of respiration of the subject P is poor based on the respiration depth information, it determines that it is necessary to notify the state of the depth of respiration of the subject P. For example, when the relative value calculated based on the respiration depth information is 49% or less, the control unit 5 determines that the state of the depth of respiration of the subject P is poor and determines that it is necessary to notify the state of the depth of respiration of the subject P. In this case, the control unit 5 generates a notification signal for notifying a medical professional of the state of the depth of respiration of the subject P and transmits the generated notification signal to the notification unit 8 or the external device 20. On the other hand, when the relative value calculated based on the respiration depth information is 50% or more, for example, the control unit 5 determines that the state of the depth of respiration of the subject P is good. In this case, the control unit 5 determines that it is not necessary to notify the state of the depth of respiration of the subject P and does not generate a notification signal.

[0053] When the control unit 5 generates a notification signal, it transmits the generated notification signal to the notification unit 8, for example. When the notification unit 8 receives a notification signal, it notifies a medical professional of the state of the depth of breathing of the subject P based on the received notification signal. For example, when the notification unit 8 auditorily notifies a medical professional around the information generating device 1 of the state of the depth of breathing of the subject P, it outputs a voice message such as "The breathing state of the subject P seems to be poor. Please check the condition of the subject P." Furthermore, when the notification unit 8 visually notifies a medical professional around the information generating device 1 of the state of the depth of breathing of the subject P, it causes the display unit 7 to output text information such as "The breathing state of the subject P seems to be poor. Please check the condition of the subject P."

[0054] The functions described above can be realized by the memory 51 and the processor 52. A computer program for executing the above-described processes can be stored in the memory 51. The computer program may be stored in advance in the memory 51, or may be downloaded from an external server via a communication network.

[0055] In addition, a computer-readable medium may be used in this embodiment. A computer-readable medium refers to any type of physical memory (RAM, ROM, etc.) that can store information or data that can be read by the processor 52. A computer-readable medium may store instructions for execution by one or more processors. Note that the term "computer-readable medium" encompasses tangible items and excludes carrier waves and transitory signals (i.e., non-transitory). Examples of non-transitory computer-readable media include magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / Ws, and semiconductor memories (e.g., mask ROMs, PROMs (Programmable ROMs)). ROM (programmable ROM), EPROM (erasable PROM), and flash ROM).

[0056] The respiratory condition of a subject is generally determined based on the rate and depth of breathing. While the rate of breathing can be objectively determined from the respiratory rate, the depth of breathing is subjectively determined by medical professionals visually observing the respiratory waveform, making it difficult to objectively determine. Therefore, the inventors have come to the conclusion that the depth of breathing can be objectively determined by comparing a reference respiratory waveform with the respiratory waveform included in the respiratory waveform data acquired from the subject.

[0057] According to the above-described configuration, the breathing depth information generated by the control unit 5 is generated by comparing the breathing waveform data acquired from the subject P with reference breathing waveform data, which serves as a reference for determining the breathing depth of the subject P. In other words, the breathing depth information is information that objectively indicates the breathing depth of the subject. Therefore, for example, by visually checking the display unit 7 displaying the breathing depth information, a medical professional can determine the breathing depth based on the breathing depth information, which serves as an objective indicator, rather than judging the breathing depth based on personal experience, as in the past. As a result, the medical professional can objectively grasp the breathing depth of the subject P.

[0058] Furthermore, with the above configuration, the respiration depth information generated by the control unit 5 indicates the relative magnitude of the second amplitudes A21-A29 of the second respiration waveform included in the respiration waveform data relative to the first amplitude A1 of the first respiration waveform included in the respiration reference waveform data. Therefore, even in this case, medical personnel can determine the respiration depth based on the respiration depth information, which serves as an objective index, and can therefore objectively grasp the respiration depth of the subject P.

[0059] Furthermore, with the above-described configuration, the respiratory reference waveform data can be set based on respiratory waveform data previously acquired from the subject P. Because respiratory waveforms vary significantly from subject to subject, it is desirable to set the respiratory reference waveform data based on respiratory waveform data previously acquired from the subject. Therefore, with the above-described configuration, more accurate respiratory depth information can be generated.

[0060] Furthermore, with the above configuration, the respiratory reference waveform data can be set based on the attribute information of the subject P. Therefore, even if there is no respiratory waveform data previously acquired from the subject P, for example, by using the respiratory reference waveform data set based on the attribute information of the subject P, respiratory depth information can be generated.

[0061] Furthermore, with the above configuration, the attribute information includes age information, gender information, chronic disease information, and medical history information, etc. Therefore, even if there is no respiratory waveform data previously acquired from the subject P, respiratory depth information is generated based on, for example, reference respiratory waveform data set based on statistical respiratory waveform data acquired from multiple other people with attributes similar to those of the subject P. Therefore, even if there is no respiratory waveform data previously acquired from the subject P, it is possible to generate relatively accurate respiratory depth information.

[0062] Furthermore, with the above configuration, the respiration depth information is generated by comparing the first amplitude A1 of the first respiration waveform included in the respiration reference waveform data with the second amplitudes A21-A29 of the second respiration waveform included in the respiration waveform data. The first amplitude A1 and the second amplitudes A21-A29 are determined using both the peak expiratory pressure and the peak inhaled pressure, which allows the control unit 5 to generate respiration depth information that more accurately reflects the respiration state of the subject P.

[0063] Furthermore, with the above configuration, the respiration depth information includes classification information according to the relative magnitudes of the second amplitudes A21 to A29 with respect to the first amplitude A1. Therefore, by using the classification information, medical personnel can objectively and easily grasp the state of the respiration depth of the subject P.

[0064] Furthermore, with the above configuration, the respiration depth information includes numerical information indicating the relative magnitudes of the second amplitudes A21 to A29 with respect to the first amplitude A1. Therefore, by using the numerical information, medical personnel can know the state of the respiration depth of the subject P from the numerical information as well, and can grasp it more objectively and easily.

[0065] Furthermore, with the above configuration, display data is generated so that the respiratory depth information is displayed near the unit respiratory waveforms 751 to 759. By visually checking the display screen based on such display data, medical personnel can easily recognize which part of the respiratory waveform the respiratory depth information corresponds to. In particular, when display data is generated so that the respiratory depth information is displayed near the peaks of the unit respiratory waveforms 751 to 759, medical personnel can more easily recognize which part of the respiratory waveform the respiratory depth information corresponds to.

[0066] Furthermore, with the above configuration, the respiratory depth information is generated so as to be displayed in association with each of the unit respiratory waveforms 751 to 759. By visually checking the display screen based on such display data, a medical professional can grasp the depth of each breath of the subject at a glance during the predetermined time period.

[0067] Furthermore, with the above configuration, the control unit 5 generates aggregate information regarding the depth of breathing of the subject P at a predetermined time based on a plurality of pieces of breathing depth information generated continuously at the predetermined time. Therefore, for example, a medical professional can easily grasp the outline of the depth of breathing of the subject P at the predetermined time by using the aggregate information.

[0068] Furthermore, with the above configuration, the control unit 5 generates, as display data, either first display data in which the inspiratory pressure is higher than the expiratory pressure in the respiratory waveform, or second display data in which the expiratory pressure is higher than the inspiratory pressure in the respiratory waveform. Therefore, the information generating device 1 can provide a display mode of the respiratory waveform that suits the preference of a medical professional viewing the respiratory waveform.

[0069] Furthermore, with the above-described configuration, the information generating device 1 includes the display unit 7 for displaying the respiratory waveform data and the respiratory depth information. Therefore, with the information generating device 1, even if there is no external device 20 for displaying the respiratory waveform data and the respiratory depth information, the medical staff can visually recognize the respiratory waveform data and the respiratory depth information.

[0070] Furthermore, with the above configuration, the control unit 5 generates a notification signal for notifying the state of the depth of breathing based on the depth of breathing information. Therefore, with the information generating device 1, for example, if the depth of breathing of the subject P is poor, this fact is notified to a medical professional. As a result, the medical professional can immediately grasp the state of the depth of breathing of the subject P, and can immediately take appropriate measures for the subject P if the depth of breathing of the subject is poor.

[0071] (Modification of the first embodiment) Next, a modified example of the first embodiment will be described with reference to Fig. 7. This modified example differs from the first embodiment in that markers M7 to M9 (classification information) and relative values ​​X7 to X9 (numerical information) are displayed at any of the positions indicated by the dashed lines in Fig. 7. That is, this modified example differs from the first embodiment in that respiration depth information is displayed near the unit respiration waveform. The vicinity of the unit respiration waveform is, for example, the areas R1 to R3 surrounded by the dashed line in Fig. 7. In other words, the vicinity of the unit respiration waveform is the rising or falling position of the unit respiration waveform, above or below the peak of the unit respiration waveform, etc.

[0072] In this modification as well, the respiratory depth information is located near the unit respiratory waveform, so medical personnel can easily recognize which part of the respiratory waveform the respiratory depth information corresponds to.

[0073] Second Embodiment Next, a second embodiment will be described with reference to FIG. 8. This embodiment differs from the first embodiment in that respiration depth information is generated for each data set including three consecutive unit respiration waveforms. In other words, the respiration depth information generated in this embodiment indicates the depth of three consecutive respirations by the subject P as a single piece of information (e.g., the average, maximum, and minimum values ​​of relative values ​​corresponding to the three consecutive respirations). Note that the data set may include two or more consecutive unit respiration waveforms, and the number of unit respiration waveforms included in the data set is not limited to three. In addition, in the description of this embodiment, portions that overlap with the description of the first embodiment will be omitted as appropriate.

[0074] For example, at 18:10, the control unit 5 calculates the relative values ​​X7 to X9 using the same principle as in the first embodiment. After calculating the relative values ​​X7 to X9, the control unit 5 calculates, for example, an average value X10 of the relative values ​​X7 to X9 and classifies the state of the depth of breathing of the subject P based on the calculated average value X10 and the classification standard information. In this embodiment, the relative value X7 is 20%, the relative value X8 is 16%, and the relative value X9 is 15% (see FIG. 6), so the average value X10 of the relative values ​​X7 to X9 is 17%. Therefore, the control unit 5 classifies the state of the depth of breathing of the subject P corresponding to the data set including the unit respiratory waveforms 757 to 759 as "dangerous" and generates classification information corresponding to this classification.

[0075] When the control unit 5 classifies the state of the depth of respiration of the subject P corresponding to the data set including the unit respiratory waveforms 757-759, it generates respiration depth information indicating the state of the depth of respiration, and generates first display data based on the generated respiration depth information. In this embodiment, the display screen based on the first display data generated is the display screen shown in FIG. 8. As shown in FIG. 8, the unit respiratory waveforms 757-759 are surrounded by a rectangular frame F1. The left side F11 of the frame F1 passes through the rising edge of the unit respiratory waveform 757, and the right side F12 of the frame F1 passes through the falling edge of the unit respiratory waveform 759.

[0076] The shape of the frame line F1 can be changed depending on the classified state. For example, the frame line F1 may be set to be thicker as the breathing depth state becomes poorer, or may be colored according to the classified state. A marker M10 (classification information) hatched with diagonal lines representing "danger" and an average value X10 (numerical information) are displayed above and outside the frame line F1. The relative value X10 is displayed near the left side of the marker M10. The marker M10 and the average value X10 may be displayed inside the frame line F1 or near the left and right sides of the frame line F1.

[0077] According to the above configuration, by viewing the display screen, a medical professional can visually recognize the depth of multiple breaths collectively as a single piece of information.

[0078] The above-described embodiments are provided to facilitate understanding of the present invention, and are not intended to limit the present invention, which may be modified or improved without departing from the spirit and scope of the present invention.

[0079] In the above embodiment, the control unit 5 generates the respiration depth information based on the relative values ​​X1 to X9 calculated by comparing the first amplitude A1 with the second amplitudes A21 to A29, but this embodiment is not limited to this. For example, the control unit 5 may generate the respiration depth information based on the similarity between the respiratory reference waveform 74 and the respiratory waveform 75 calculated by comparing both waveforms.

[0080] In the above embodiment, the information generating device 1 does not include the pressure sensor 10, but the acquiring unit 2 of the information generating device 1 may include a pressure sensor having a configuration similar to that of the pressure sensor 10. In this case, the acquiring unit 2 detects at least one of the respiratory gases from inside the mouth or inside the nose of the subject P, and acquires respiratory waveform data related to the respiratory pressure of the subject P based on the detected respiratory gases.

[0081] In the above embodiment, the information generating device 1 includes the storage unit 4, but the information generating device 1 does not necessarily have to include the storage unit 4. In this case, the memory 51 of the control unit 5 functions as the storage unit.

[0082] In the above embodiment, the first value is the first amplitude A1 of the first respiratory waveform included in the respiratory reference waveform data, and the second value is the second amplitude A21-A29 of the second respiratory waveform included in the respiratory waveform data. However, this embodiment is not limited to this. For example, the first value may be the maximum respiratory pressure in the entire respiratory reference waveform, and the second value may be the maximum respiratory pressure in the entire respiratory waveform. Alternatively, the first value may be the average respiratory pressure in the first respiratory waveform from the start of breathing until a predetermined time has elapsed, and the second value may be the average respiratory pressure in the second respiratory waveform from the start of breathing until a predetermined time has elapsed. Furthermore, the first value may be the maximum respiratory pressure in the first respiratory waveform from the start of breathing until a predetermined time has elapsed, and the second value may be the maximum respiratory pressure in the second respiratory waveform from the start of breathing until a predetermined time has elapsed. Alternatively, the first value may be the average respiratory pressure from the rising edge to the peak of the first respiratory waveform, and the second value may be the average respiratory pressure from the rising edge to the peak of the second respiratory waveform.

[0083] In the above embodiment, markers are displayed as classification information on the display unit 7, but for example, text information indicating the state of the depth of breathing of the subject P may also be displayed as classification information. Furthermore, instead of markers, the state of the depth of breathing of the subject P may be indicated by changing the thickness of the unit respiratory waveform based on the state of the depth of breathing of the subject P. In this case, the thickness of the unit respiratory waveform corresponds to the classification information.

[0084] In the above embodiment, the display unit 7 displays the relative value as numerical information, but may also display, for example, a level from 1 to 5 corresponding to the calculated relative value. Note that the number of levels is not limited to 5, and may be any number greater than or equal to 2.

[0085] In the above embodiment, the display unit 7 displays the markers and the relative values, but either the markers or the relative values ​​need not be displayed on the display unit 7. In other words, the breathing depth information may include only either the classification information or the numerical information.

[0086] In the above embodiment, the identification markers S1 to S3 and the cumulative number information are displayed on the display unit 7 at 18:10. However, the identification markers S1 to S3 and the cumulative number information do not have to be displayed on the display unit 7.

[0087] In the above embodiment, each classification representing the state of respiratory depth is distinguished by applying different hatching to the identification markers S1-S3 and the markers M1-M10, but this embodiment is not limited to this. For example, each classification may be distinguished by applying different colors to the identification markers S1-S3 and the markers M1-M10, or by giving the identification markers S1-S3 and the markers M1-M10 different shapes. Furthermore, each classification may be distinguished by applying different colors to the background of each unit respiratory waveform or to each unit respiratory waveform based on classification information.

[0088] In the above embodiment, an example has been described in which biological information including respiratory waveform data is acquired from a subject P who has been administered an anesthetic during surgery before and after surgery, but the present embodiment is not limited to this example. For example, the present invention is also applicable to an example in which the breathing of the subject P changes from tachypnea to hypopnea.

[0089] In the above embodiment, the state of the depth of breathing is classified as "normal, caution, danger", but may be classified as "level 1, level 2, level 3".

[0090] In the above embodiment, the state of the depth of breathing is classified into three states, "normal, caution, and danger," but it may be classified into two or four or more states.

[0091] In the above embodiment, the relative value is displayed near the left side of the marker, but it may also be displayed near the top or right side of the marker.

[0092] In the above embodiment, the display unit 7 displays the reference respiratory waveform 74, but the reference respiratory waveform 74 does not have to be displayed. In other words, the control unit 5 may generate display data that does not include reference respiratory waveform data.

[0093] In the above embodiment, the control unit 5 generates respiratory depth information by comparing the respiratory reference waveform 74 and the respiratory waveform 75, and then generates display data for displaying the respiratory waveform data and the respiratory depth information. However, for example, the control unit 5 may be configured to generate display data for displaying preset respiratory reference waveform data and the respiratory waveform data acquired by the acquisition unit 2, without generating respiratory depth information. In this case, the control unit 5 causes the display unit 7 or the display unit of the external device 20 to display a display screen displaying the respiratory reference waveform 74 and the respiratory waveform 75 based on the generated display data. Furthermore, even when the control unit 5 generates respiratory depth information, the control unit 5 may be configured to generate display data that does not include respiratory depth information in accordance with a setting operation by the user. [Explanation of symbols]

[0094] 1: Information generating device, 2: Acquisition unit, 3: Operation unit, 4: Storage unit, 5: Control unit, 6: Output interface, 7: Display unit, 8: Notification unit, 9: Bus, 10: Pressure sensor, 20: External device, 51: Memory, 52: Processor

Claims

1. an acquisition unit configured to acquire respiratory waveform data relating to the subject's respiratory pressure; a control unit configured to compare preset reference respiratory waveform data with the respiratory waveform data acquired by the acquisition unit, thereby generating respiratory depth information indicating a respiratory depth of the respiratory waveform data relative to the reference respiratory waveform data, the control unit is configured to generate cumulative count information indicating a cumulative number of hits for each classification of the depth of breathing of the subject during a predetermined time period, based on a plurality of pieces of respiratory depth information continuously generated during the predetermined time period, and to generate display data for displaying the cumulative number of hits together with an identification mark for each classification, the respiratory reference waveform data includes a first respiratory waveform having a first amplitude; the respiratory waveform data includes a second respiratory waveform having a second amplitude; The information generating device, wherein the control unit is configured to generate display data for displaying the first respiratory waveform and the second respiratory waveform side by side.

2. the respiratory reference waveform data includes a first respiratory waveform having a first amplitude; the respiratory waveform data includes a second respiratory waveform having a second amplitude; the first amplitude is determined based on a peak expiratory pressure in the first respiratory waveform and a peak inspiratory pressure in the first respiratory waveform; the second amplitude is determined based on a peak expiratory pressure in the second respiratory waveform and a peak inspiratory pressure in the second respiratory waveform; The information generating device according to claim 1 , wherein the control unit generates the respiration depth information by comparing the first amplitude with the second amplitude.

3. 3. The information generating device according to claim 1, wherein the respiratory depth information includes classification information according to a relative magnitude of a second value indicating the respiratory pressure based on the respiratory waveform data to a first value indicating the respiratory pressure based on the respiratory reference waveform data.

4. 4. The information generating device according to claim 1, wherein the respiratory depth information includes numerical information indicating a relative magnitude of a second value indicating the respiratory pressure based on the respiratory waveform data to a first value indicating the respiratory pressure based on the respiratory reference waveform data.

5. the control unit is configured to generate display data for displaying the respiratory waveform data and the respiratory depth information, the respiratory waveform based on the respiratory waveform data includes at least one unit respiratory waveform corresponding to one breath of the subject; The information generating device according to claim 1 , wherein the display data is generated so that the respiratory depth information is displayed near the unit respiratory waveform.

6. 2. The information generating device according to claim 1, wherein the control unit is configured to generate aggregate information regarding the depth of breathing of the subject at a predetermined time based on a plurality of pieces of the depth of breathing information continuously generated at the predetermined time.

7. the control unit is configured to generate display data for displaying the respiratory waveform data and the respiratory depth information, 7. The information generating device according to claim 1, wherein the control unit is configured to generate, as the display data, either first display data in which the inspiratory pressure is higher than the expiratory pressure in a respiratory waveform based on the respiratory waveform data, or second display data in which the expiratory pressure is higher than the inspiratory pressure in the respiratory waveform.

8. the information generating device includes a display unit, 8. The information generating device according to claim 1, wherein the control unit is configured to generate display data for displaying the respiratory waveform data and the respiratory depth information on the display unit.

9. 9. The information generating device according to claim 1, wherein the control unit is configured to generate an alarm signal for notifying the subject of a state of depth of breathing based on at least the depth of breathing information.

10. acquiring respiratory waveform data relating to the subject's respiratory pressure; generating breathing depth information indicating the breathing depth of the respiratory waveform data relative to the respiratory reference waveform data by comparing the acquired respiratory waveform data with preset respiratory reference waveform data; generating cumulative number information indicating a cumulative number of occurrences of each classification related to the depth of breathing of the subject during a predetermined time period based on the plurality of pieces of respiratory depth information continuously generated during the predetermined time period; generating display data for displaying the cumulative number of hits together with the identification mark for each classification, the information generating method being executed by an information generating device, The information generation method includes: generating display data by the information generating device; the respiratory reference waveform data includes a first respiratory waveform having a first amplitude; the respiratory waveform data includes a second respiratory waveform having a second amplitude; An information generating method, wherein in the step of generating display data, the display data is generated for displaying the first respiratory waveform and the second respiratory waveform side by side.

11. a function for acquiring respiratory waveform data relating to the subject's respiratory pressure; a function of generating breathing depth information indicating the breathing depth of the respiratory waveform data relative to the respiratory reference waveform data by comparing the acquired respiratory waveform data with preset respiratory reference waveform data; a function of generating cumulative number information indicating a cumulative number of occurrences of each classification related to the depth of breathing of the subject during a predetermined time period based on a plurality of pieces of respiratory depth information continuously generated during the predetermined time period; a computer program for causing a computer to realize a function of generating display data for displaying the cumulative number of hits together with the identification mark for each classification, the respiratory reference waveform data includes a first respiratory waveform having a first amplitude; the respiratory waveform data includes a second respiratory waveform having a second amplitude; A computer program that generates the display data for displaying the first respiratory waveform and the second respiratory waveform side by side.

12. A non-transitory computer-readable medium having the computer program of claim 11 recorded thereon.

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