JP2019180800A - Type determination device - Google Patents

Abstract

To determine a type of during-night hypoxemia.SOLUTION: A type determination device 100 comprises: an oxygen saturation information acquisition part 110 for acquiring oxygen saturation information being information related to chronological change of arterial oxygen saturation; a conversion part 120 for frequency converting oxygen saturation information in a first period; a power extraction part 130 for extracting power in a prescribed frequency range; a period calculation part 140 for calculating an excess period which is a total sum of a period in which, the power extracted in a second period longer than the first period exceeds a first threshold; a determination part 150 for determining that, if the excess period is equal to or greater than a second threshold, a type is an intermittent type; and a notification part 160 for notifying a user of the determination result.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for discriminating types of nocturnal hypoxemia.

  The number of practitioners who receive home oxygen therapy (HOT), which is a method of inhaling oxygen at home, is increasing year by year. For example, patients called chronic obstructive pulmonary disease (COPD), pulmonary tuberculosis sequelae, interstitial pneumonia, heart disease, thorax / vertebral column disease, neuromuscular disease, etc. may receive this home oxygen therapy.

A practitioner who receives home oxygen therapy may cause hypoxemia, which is a condition in which oxygen in arterial blood is insufficient during sleep such as at night. Oxygen therapy is often used as a response during sleep. Specifically, a pulse oximeter is attached to the fingertip or ear, and the pulse rate and percutaneous arterial oxygen saturation (SpO ₂ ) are measured. Depending on the value of percutaneous arterial blood oxygen saturation obtained, the amount and concentration of oxygen to be supplied are determined, and the oxygen concentration device and oxygen cylinder are used to supply the patient with the determined concentration of oxygen. It has been subjected.

  In addition, although it thinks that the related well-known literature does not exist, the apparatus which detects a breathing pattern from a respiration signal, calculates a frequency spectrum, and detects generation | occurrence | production of Chain Stokes respiration is given as patent document 1.

Special table 2008-525060 gazette

  However, there are cases in which treatment that appropriately corresponds to the patient's symptoms is not performed. Specifically, this may be the case when a patient in need of oxygen therapy with a constant oxygen flow rate during the day is undergoing oxygen therapy that continues to flow the same oxygen flow rate at night.

  Although there are multiple types of nocturnal hypoxemia, it is complicated because a single patient may include multiple types. Therefore, there is a limit to discriminating the type of nocturnal hypoxemia only by macroscopic evaluation of findings by the examining physician. It is also desirable to change the treatment method flexibly depending on the state of hypoxemia, but it is very difficult for doctors and nurses to constantly monitor the measurement results.

  In addition, when trying to determine the type of hypoxemia at night with a device, it may be possible to make a comprehensive judgment by sensing not only oxygen saturation but also brain waves and eye movements. There is also concern that the patient will be burdened with time and accurate data cannot be obtained.

  The present invention has been made in view of the above problems, and an object thereof is to provide a type discriminating apparatus capable of discriminating the type of nocturnal hypoxemia based on only the information on oxygen saturation.

  In order to achieve the above object, a type discrimination device according to one aspect of the present invention obtains oxygen saturation information that obtains oxygen saturation information, which is information related to a temporal change in arterial oxygen saturation during sleep of a measurement subject. An acquisition unit; a conversion unit that converts the frequency of oxygen saturation information within a predetermined first period; a power extraction unit that extracts power within a predetermined frequency range based on the data converted by the conversion unit; A time calculation unit that calculates an excess period in which the power extracted by the power extraction unit in a predetermined second period that is longer than one period exceeds a first threshold, and an excess period calculated by the time calculation unit When it is equal to or greater than the second threshold value, a determination unit that determines that the type is an intermittent type and a notification unit that notifies the result of the determination unit are provided.

  According to this, it is possible to determine whether the type of nocturnal hypoxemia of the measurement subject is intermittent or non-intermittent only by acquiring the temporal change in arterial oxygen saturation.

  In addition, a baseline extraction unit that extracts a baseline of oxygen saturation from the oxygen saturation information acquired by the oxygen saturation information acquisition unit, and the oxygen saturation is less than or equal to a third threshold with respect to the extracted baseline A detection unit that detects that the detection unit has been detected, and a period measurement unit that measures a duration that is a period detected by the detection unit. You may determine with a type.

  According to this, it is possible to determine whether the type of night-time hypoxemia of the measurement subject is continuous or not.

  In addition, a baseline extraction unit that extracts a baseline of oxygen saturation from the oxygen saturation information acquired by the oxygen saturation information acquisition unit, and the oxygen saturation is less than or equal to a third threshold with respect to the extracted baseline A detection unit that detects that the detection unit has been detected, and a period measurement unit that measures a duration that is a period detected by the detection unit, wherein the determination unit has a duration that is greater than or equal to a sixth threshold and less than a seventh threshold. However, if the number of occurrences is equal to or greater than the ninth threshold after a time equal to or greater than the eighth threshold, the irregular type may be determined.

  According to this, it can be determined whether the type of night-time hypoxemia of the measurement subject is irregular or irregular.

  The oxygen saturation information acquisition unit may acquire oxygen saturation information from a pulse oximeter attached to the measurement subject.

  According to this, oxygen saturation information can be acquired only by attaching a lightweight device to the fingertip or ear, and the burden on the subject can be reduced.

  The determination unit may determine a type based on oxygen saturation information from before a predetermined period to the present, and the notification unit may immediately notify a result of the determination unit.

  According to this, the determination result can be notified in real time, and the treatment policy can be changed immediately in response to the occurrence of the symptom.

  It should be noted that the execution of the program for causing the computer to execute each process executed by the type discrimination device also corresponds to the implementation of the present invention. Of course, the implementation of the recording medium in which the program is recorded also corresponds to the implementation of the present invention.

  It is possible to determine the type of nocturnal hypoxemia simply by obtaining oxygen saturation information, which is information related to changes over time in arterial oxygen saturation during sleep of the measurement subject.

It is a block diagram which shows the function structure of a type discrimination device with a mechanism structure. It is a flowchart which shows operation | movement of a type discrimination device. It is a graph which shows the data of oxygen saturation, and the analysis state of data in multiple steps. It is a graph which shows the other analysis state of the data of oxygen saturation.

  The inventor obtains waveform data of percutaneous arterial blood oxygen saturation for the target patient at the hospital or related facility where the inventor works, analyzes the data, and increases the N number of the target patient. I came to find the causal relationship between the treatment judged by the doctor and the analysis result.

  As a result, in the past, a simple percutaneous treatment was performed for cases in which treatment for sleep at night or the like was uniformly performed on the target patient and there was a case where the therapeutic effect on the patient did not appear. It was found that better treatment can be performed for each patient by acquiring data of arterial oxygen saturation and mechanical analysis.

  Furthermore, if the target patient acquires waveform data of percutaneous arterial oxygen saturation for a long time and analyzes them at regular intervals, the type of nocturnal hypoxemia can be determined accurately and reproducibly. I found what I can do.

  Next, an embodiment of a type identification device according to the present invention will be described with reference to the drawings. It should be noted that each of the embodiments described below shows a comprehensive or specific example. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  In addition, the drawings are schematic diagrams in which emphasis, omission, and ratio adjustment are appropriately performed to show the present invention, and may differ from actual shapes, positional relationships, and ratios.

  FIG. 1 is a block diagram showing a functional configuration of the type discriminating apparatus together with a mechanism configuration. As shown in the figure, the type discriminating device 100 is a device that determines the type of nighttime hypoxemia from the temporal change in arterial oxygen saturation during sleep of the measurement subject, and causes the processor to execute a program. A plurality of processing units realized by the above are provided. The type identification device 100 includes an oxygen saturation information acquisition unit 110, a conversion unit 120, a power extraction unit 130, a time calculation unit 140, a determination unit 150, and a notification unit 160 as processing units. In the present embodiment, the type identification device 100 further includes a baseline calculation unit 170, a detection unit 180, and a period measurement unit 190. In addition, a pulse oximeter 200, a display device 210, and a storage device 220 are connected to the type identification device 100.

  The oxygen saturation information acquisition unit 110 is a processing unit that acquires oxygen saturation information, which is information related to changes over time in arterial oxygen saturation during sleep of the measurement subject. The information acquisition method of the oxygen saturation information acquisition unit 110 is not particularly limited, and for example, a method of acquiring information via a network such as the Internet or a LAN, or acquiring information by reading information recorded on a recording medium A method etc. can be illustrated. In the case of the present embodiment, the oxygen saturation information acquisition unit 110 is connected to the pulse oximeter 200 so as to be communicable, and the oxygen saturation acquired from the pulse oximeter 200 is used as oxygen saturation information together with time information in real time. Store in the storage device 220.

  Here, the oxygen saturation information measured by the pulse oximeter 200 is information on the percutaneous arterial blood oxygen saturation and almost coincides with the arterial blood oxygen saturation. Therefore, the oxygen saturation information acquisition unit 110 includes the pulse oximeter. Data output from 200 is processed as arterial oxygen saturation. The pulse oximeter 200 is preferable because it can measure an approximate value of arterial oxygen saturation in real time.

  The conversion unit 120 is a processing unit that converts the frequency of oxygen saturation information within a predetermined first period. The method of frequency conversion is not particularly limited, and conversion to frequency domain information by a parametric method using an AR model can be exemplified. In the case of the present embodiment, the conversion unit 120 converts the oxygen saturation information in the first period into frequency domain information by performing Fourier transform by fast Fourier transform.

  Although a 1st period is not specifically limited, It is preferable to set to the period which can derive | lead-out a significant result in consideration of a person's sleep time. Further, since a certain amount of data is necessary for performing the fast Fourier transform, for example, the first period is preferably about 600 seconds. The first period corresponds to the window width when fast Fourier transform is performed.

  The power extraction unit 130 is a processing unit that extracts power within a predetermined frequency range based on the data converted by the conversion unit 120.

  The frequency range is not particularly limited, but it is preferable to extract the power in the frequency range where a significant result can be derived in consideration of human respiration. In the case of the present embodiment, the frequency range ΔF is a range of 0.7 / 60 Hz or more and 1.5 / 60 Hz or less, and the maximum power in the range is extracted as power.

  The time calculation unit 140 is a processing unit that calculates an excess period, which is a total of times when the power calculated by the power extraction unit 130 exceeds the first threshold in a predetermined second period longer than the first period. The second period is not particularly limited, but is preferably set to a period in which a significant result can be derived in consideration of the change time of human symptoms. For example, the second period is preferably about 3600 seconds. In the case of the present embodiment, the end time of the first period and the second period is the same, and the first period is included in the second period. The time at the end of the first period and the second period is the time when the oxygen saturation is acquired from the pulse oximeter 200. Thereby, the total number of nighttime hypoxemia can be determined in real time.

  The first threshold value is not particularly limited, but is preferably set to a value that can significantly determine the intermittent type in nocturnal hypoxemia. In the present embodiment, the first threshold is set to Pth (2.0).

  The determination unit 150 is a processing unit that determines an intermittent type when the time calculated by the time calculation unit 140 is equal to or greater than the second threshold.

  The second threshold value is not particularly limited, but is preferably set to a value that can significantly determine the intermittent type in nocturnal hypoxemia. In the present embodiment, the second threshold is set to 1300 seconds.

  Therefore, in the case of the present embodiment, the determination unit 150 determines that it is an intermittent type when the time calculated by the time calculation unit 140 exceeds 1300 seconds.

  The notification unit 160 is a processing unit that notifies the result of the determination unit. The notification method of the determination result by the notification unit 160 is not particularly limited, and a person may be notified that an intermittent type has occurred due to sound, light, an image, vibration, or the like. Moreover, you may alert | report by transmitting to another computer, a terminal, etc. as information. Furthermore, it may be sent as a message such as e-mail.

  In the case of the present embodiment, the notification unit 160 is communicably connected to a display device 210 such as a liquid crystal display, and is intermittent based on characters, symbols, images, etc. that can be recognized by a person based on the determination result of the determination unit 150. Is displayed by displaying on the display device 210 that the above type exists.

  The baseline calculation unit 170 is a processing unit that calculates a baseline of oxygen saturation from the oxygen saturation information acquired by the oxygen saturation information acquisition unit 110.

  The baseline is the oxygen saturation information waveform when the oxygen saturation information waveform remains substantially constant for a predetermined period before the waveform drops below the third threshold with respect to the baseline. A moving average of values.

  The detection unit 180 is a processing unit that detects that the oxygen saturation is less than or equal to the third threshold with respect to the calculated baseline, and detects that the oxygen saturation is less than or equal to the fourth threshold.

  The third threshold is not particularly limited, but it is preferable to set the third threshold to a value that can significantly determine the persistent type in nocturnal hypoxemia. In the case of the present embodiment, the third threshold value is set as −3% from the baseline value at the detection time. Accordingly, since the baseline fluctuates gently, the third threshold value fluctuates in the same manner.

  For example, when the baseline value at the detection time is 97%, the third threshold value is 94.1%, and the detection unit 180 detects that the oxygen saturation is 94.1% or less.

  Although the third threshold value and the fourth threshold value are not necessarily the same value, in the case of the present embodiment, the third threshold value and the fourth threshold value are the same value.

  The period measurement unit 190 is a processing unit that measures a duration that is a period detected by the detection unit 180. Specifically, when the baseline is not significantly changed at 97%, the third threshold value is constant at 94%. In this case, the detection unit 180 detects that the oxygen saturation is 94% or less, and the period measurement unit 190 measures the time that the detection unit 180 continues to detect as the duration.

  When the duration acquired from the period measurement unit 190 is equal to or greater than the fifth threshold, the determination unit 150 determines that the duration type is the sustained type, and the notification unit 160 notifies the fact. In addition, the determination unit 150 is an irregular type when the duration of the sixth threshold or more and less than the seventh threshold occurs for the number of times equal to or greater than the ninth threshold with a time equal to or greater than the eighth threshold. The notification unit 160 notifies that fact.

  The fifth threshold is not particularly limited, but it is preferable to set the fifth threshold to a value that can significantly determine the persistent type in nocturnal hypoxemia. In the present embodiment, the fifth threshold is set as 655 seconds.

  For example, when the period measurement unit 190 measures a duration of 655 seconds (fifth threshold value) or more, the determination unit 150 notifies that there is a persistent type.

  The sixth threshold value and the seventh threshold value are not particularly limited, but the sixth threshold value is less than the seventh threshold value, and is set to a value that can significantly determine the irregular type of nocturnal hypoxemia. It is preferable. Further, the seventh threshold value is preferably equal to or lower than the fifth threshold value, and in the case of the present embodiment, the fifth threshold value and the seventh threshold value are the same. Specifically, the sixth threshold is 30 seconds and the seventh threshold is 655 seconds.

  The eighth threshold is not particularly limited, but it is preferable to set the eighth threshold to a value that can significantly determine the irregular type in nocturnal hypoxemia. Moreover, it is preferable that an 8th threshold value is more than a 6th threshold value. Specifically, the eighth threshold is 90 seconds.

  The ninth threshold value is not particularly limited, but is preferably set to a value that can significantly determine the irregular type in nocturnal hypoxemia. The ninth threshold is an integer of 2 or more. In the case of the present embodiment, the ninth threshold is set to 2 times.

  In the present embodiment, in the determination unit 150, the period measurement unit 190 measures a duration of 30 seconds (sixth threshold) or more and less than 655 seconds (seventh threshold), and 90 seconds (eighth threshold) or more. When the period measuring unit 190 measures a duration of 30 seconds (sixth threshold) or more and less than 655 seconds (seventh threshold) again with an interval of, the determination unit 150 determines that the type is irregular. The notification unit 160 notifies that fact.

  Next, the operation of the type identification device 100 will be described. FIG. 2 is a flowchart showing the operation of the type discrimination device. The oxygen saturation information acquisition unit 110 of the type identification device 100 acquires oxygen saturation data that changes over time (see, for example, the stage of FIG. 3A) (S101). As the data acquisition method, the already logged oxygen saturation data may be acquired collectively, but in the case of the present embodiment, the data sequentially transmitted from the pulse oximeter 200 is used as the oxygen saturation information acquisition unit. 110, and the oxygen saturation acquired by the oxygen saturation information acquisition unit 110 is associated with the time information and registered in the storage device 220.

  Next, the transform unit 120 performs fast transform on the data from the past to the present in the first period to perform frequency transform (S102). In the case of the present embodiment, the fast Fourier transform is performed on the data in the window during the first period 301 (see graph (a) in FIG. 3), specifically, for example, from the current 300 to 600 seconds. As a result of the frequency conversion, a graph as shown in graph (b) of FIG. 3 is obtained. Next, based on the result of the Fourier transform, the power extraction unit 130 extracts the maximum power in a predetermined frequency range (the range indicated by the broken line in the horizontal direction described in the graphs (b) and (c) in FIG. 3) ( S103). The Fourier transform and the extraction of the maximum power are performed by movement calculation in the first period 301. The graph (c) in FIG. 3 shows the power for each frequency at the current time 300. The graph (d) in FIG. 3 is a graph in which the maximum power is arranged in time series.

  As shown in the graph (d) of FIG. 3, the time calculation unit 140 sequentially acquires the calculated maximum power and exceeds the first threshold 311 (in the present embodiment, the first threshold 311 is 2). The time from when the power is acquired until the maximum power lower than the first threshold is acquired is measured, and the time measured within the second period 302 (in the present embodiment, the second period 302 is 3600 seconds) Is calculated as the excess period (S104). The graph (e) in FIG. 3 is a graph in which excess times are arranged in time series.

  The determination unit 150 compares the calculated excess period with the second threshold 312 (in the present embodiment, the second threshold 312 is 1300 seconds) (S105). When the excess period exceeds the second threshold value 302, the determination unit 150 determines that an intermittent type exists (S105: Yes). On the other hand, the determination unit 150 is from the time when the oxygen saturation information acquisition unit 110 acquires data until the data acquisition ends, that is, until the processing of all data in one sleep of the measurement subject ends. If the excess period does not exceed the second threshold during the period, a “normal” flag is set.

  On the other hand, the baseline calculation unit 170 calculates the baseline 303 (see graph (f) in FIG. 4) based on the data (graph (a) in FIG. 3) acquired by the oxygen saturation information acquisition unit 110 (S106). . The baseline 303 is calculated based on a moving average over a predetermined period (for example, 3600 seconds) in principle. If the predetermined period has not elapsed since the start of data acquisition, the baseline 303 is calculated based on the acquired data.

  The detection unit 180 detects the case where the data acquired by the oxygen saturation information acquisition unit 110 is equal to or less than the third threshold 313 (the fourth threshold is the same) with respect to the calculated baseline 303 (S107). In the case of this embodiment, the third threshold 313 is a value of −3% of the baseline.

  The period measurement unit 190 is the time from when the data acquired by the oxygen saturation information acquisition unit 110 detects that the detection unit 180 is less than or equal to the third threshold 313 with respect to the baseline to when the data reaches the third threshold or more. A certain duration is measured (S108). In the graph (f) of FIG. 4, the duration is indicated by a hatched band.

  The determination unit 150 determines whether or not the measured result, that is, the width of the hatched band in the graph (f) in FIG. 4 has exceeded the sixth threshold value (30 seconds in the present embodiment) ( S109) If not exceeded, a "normal" flag is set. When the fifth threshold value (655 seconds in the case of the present embodiment) is exceeded (the darkest hatched band in the graph (f) in FIG. 4) (S110: Yes), the determination unit 150 is a continuous type. Is determined. On the other hand, when the fifth threshold value has not been exceeded (S110, No), the determination unit 150 next measures the time until the duration of the sixth threshold value or more and less than the seventh threshold value (same as the fifth threshold value) is measured ( For example, the period 304 shown in FIG. 4 is measured, and the period is the eighth threshold (90 seconds in the present embodiment) or more and the tenth threshold (3600 seconds in the present embodiment). If the duration of the ninth threshold (2 in the case of the present embodiment) is measured more than the sixth threshold and less than the seventh threshold, it is determined to be irregular. Note that the tenth threshold value is not particularly limited, but for example, the same period as the period for calculating the baseline can be exemplified.

  When the determination unit 150 determines any of the intermittent type, the irregular type, and the continuous type, the notification unit 160 may notify the display unit 210 or the like to that effect. In this case, it is possible to perform an appropriate treatment based on the determined type by a doctor or nurse who has recognized the notified information.

  The above processing is performed until the measurement subject wakes up (S112: Yes). Alternatively, it is performed based on data from the sleep of the measurement subject to awakening.

  Next, the notification unit 160 aggregates the contents determined based on the data from the sleep of the measurement subject to the awakening, and normal, intermittent type, continuous type, irregular type, mixed type 1 (persistent type + non-standard type). Regular type + intermittent type), mixed type 2 (continuous type + irregular type), mixed type 3 (continuous type + intermittent type), and mixed type 4 (irregular type + intermittent type) Information on whether to do so may be provided.

  By using the nighttime hypoxemia type discriminating apparatus 100 described above, it is possible to provide highly accurate information that contributes to doctor's treatment policy determination with high reproducibility, which is important for doctor's decision of therapy. Can play a role. In particular, it is possible to accurately provide information on complex symptoms that may be overlooked by specialists. The most frequent determination result among the determinations obtained by analyzing the data of oxygen saturation during sleep acquired from 48 persons to be measured by 10 doctors and the first threshold shown in the present embodiment. Based on specific values of the tenth threshold value, the coincidence rate of the result determined by the type identification device 100 was 66.7%. The data merely shows the usefulness of the result determined by the type determining device 100 based on an example of the threshold value, and does not indicate the intention to limit each threshold value of the present invention to the above specific numerical values. .

  In addition, a general therapist or an assistant who assists the therapist can use the type discrimination device 100 to implement a treatment method according to the condition of the therapist.

  Furthermore, based on the information notified by the notification unit 160, the treatment apparatus can appropriately change the treatment state such as oxygen concentration, oxygen flow rate, and air pressure. Specifically, for example, when it is determined to be intermittent, nasal continuous positive pressure respiratory therapy (CPAP) can be selected as a treatment method. When it is determined to be irregular, it is possible to select both to adjust at least one of the oxygen amount corresponding to the oxygen saturation and the oxygen concentration. In addition, when it is determined as the continuous type, it is possible to select a treatment that causes a constant oxygen flow rate to flow. Moreover, when it is notified as a composite type, it is possible to combine these therapies.

  The present invention is not limited to the above embodiment. For example, another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention. In addition, the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning of the words described in the claims. It is.

  For example, in the above-described embodiment, the case of determining the type of nocturnal hypoxemia using measurement data relating to percutaneous arterial oxygen saturation using a pulse oximeter has been described. It is also possible to determine the type of nocturnal hypoxemia using measurement data relating to saturation.

  Moreover, although the case where the information which the determination part determined was notified in real time was demonstrated, the result determined based on the data accumulate | stored in the measurement subject's 1 time or multiple times of sleep, without notifying in real time. You may notify.

  Further, although the type discriminating device, the pulse oximeter, the display device, and the storage device have been described as separate bodies, some of them may be combined and integrated.

  The type identification device may be realized by executing software using a general-purpose device such as a smartphone, a tablet terminal, or a computer.

  It can be used to determine the type of hypoxemia at night. Specifically, mainly for chronic obstructive pulmonary disease, used for screening tests for patients with pulmonary tuberculosis sequelae, pulmonary fibrosis, collagenous interstitial pneumonia, heart disease, thorax / vertebral column disease, neuromuscular disease, etc. Is possible.

100 type discrimination device 110 oxygen saturation information acquisition unit 120 conversion unit 130 power extraction unit 140 time calculation unit 150 determination unit 160 notification unit 170 baseline calculation unit 180 detection unit 190 period measurement unit 200 pulse oximeter 210 display device 220 storage device

Claims (7)

An oxygen saturation information acquisition unit for acquiring oxygen saturation information, which is information relating to changes over time in arterial oxygen saturation during sleep of the measurement subject;
A converter for converting the frequency of oxygen saturation information within a predetermined first period;
A power extraction unit that extracts power in a predetermined frequency range based on the data converted by the conversion unit;
A time calculation unit that calculates an excess period that is a total of times when the power extracted by the power extraction unit in a predetermined second period longer than the first period exceeds a first threshold;
When the excess period calculated by the time calculation unit is equal to or greater than the second threshold, the determination unit determines that the type is intermittent.
A type discriminating apparatus provided with the alerting | reporting part which alert | reports the result by the said determination part. A baseline calculation unit that calculates a baseline of oxygen saturation from the oxygen saturation information acquired by the oxygen saturation information acquisition unit;
A detection unit for detecting that the oxygen saturation is equal to or lower than a third threshold with respect to the calculated baseline;
A period measurement unit that measures a duration that is a period detected by the detection unit;
The determination unit
The type identification device according to claim 1, wherein when the duration is equal to or greater than a fifth threshold value, the type is determined to be a sustained type. A baseline calculation unit that calculates a baseline of oxygen saturation from the oxygen saturation information acquired by the oxygen saturation information acquisition unit;
A detection unit for detecting that the oxygen saturation is equal to or lower than a fourth threshold with respect to the calculated baseline;
A period measurement unit that measures a duration that is a period detected by the detection unit;
The determination unit
The method according to claim 1, wherein the duration of the sixth threshold or more and less than the seventh threshold is determined to be an irregular type when the number of occurrences exceeds the ninth threshold with a time of the eighth threshold or more. The type discrimination device described. A baseline calculation unit that calculates a baseline of oxygen saturation from the oxygen saturation information acquired by the oxygen saturation information acquisition unit;
A detection unit for detecting that the oxygen saturation is equal to or lower than a third threshold with respect to the calculated baseline;
A period measurement unit that measures a duration that is a period detected by the detection unit;
The determination unit
If the duration is greater than or equal to the fifth threshold, it is determined that it is a sustained type,
The method according to claim 1, wherein the duration of the sixth threshold or more and less than the seventh threshold is determined to be an irregular type when the number of occurrences exceeds the ninth threshold with a time of the eighth threshold or more. The type discrimination device described. A baseline calculation unit that calculates a baseline of oxygen saturation from the oxygen saturation information acquired by the oxygen saturation information acquisition unit;
A detection unit for detecting that the oxygen saturation is equal to or lower than a third threshold with respect to the calculated baseline;
A period measurement unit that measures a duration that is a period detected by the detection unit;
In the case where the determination unit determines that the type is a non-intermittent type that is not the intermittent type, and the duration is equal to or greater than a fifth threshold, the determination unit determines that the type is a continuous type,
The method according to claim 1, wherein the duration of the sixth threshold or more and less than the seventh threshold is determined to be an irregular type when the number of occurrences exceeds the ninth threshold with a time of the eighth threshold or more. The type discrimination device described. The type discrimination device according to any one of claims 1 to 5, wherein the oxygen saturation information acquisition unit acquires oxygen saturation information from a pulse oximeter attached to the measurement subject. The determination unit determines a type based on oxygen saturation information from a predetermined period before to the present,
The type discriminating apparatus according to any one of claims 1 to 6, wherein the notification unit immediately notifies a result of the determination unit.