JP2018198657A - Biological signal recording device, and its control method - Google Patents

Abstract

To provide a biological signal recording device capable of determining whether a novel recording operation can be started or not, with a simple constitution, and in consideration of a standby time; and to provide its control method.SOLUTION: When detecting a recording start instruction, a biological signal recording device starts recording of biological signal data, on condition that a lapsed time from an event determined beforehand before start of recording of the biological signal data in the first place is not determined to be equal to or longer than a time determined beforehand. On the other hand, if the lapsed time is determined to be equal to or longer than the time determined beforehand, recording of the biological signal data is not started.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a biological signal recording apparatus and a control method thereof, and more particularly, to a biological signal recording apparatus that records biological signal data for evaluating sleep of a subject and a control method thereof.

  The number of apneas or hypopneas during sleep (also called apnea hypopnea index (AHI)) is 5 times / hour or more, and there are symptoms such as daytime sleepiness or malaise. The patient is diagnosed with apnea syndrome (SAS) or sleep apnea hypodrome syndrome (SAHS). Hereinafter, for convenience, SAS and SAHS are simply referred to as SAS.

  Diagnosis of SAS requires an overnight polysomnography (PSG) test, but an overnight polysomnography test usually requires hospital stay and a large number of sensors. The burden on the subject is relatively large. Therefore, a simpler screening test (also called a simple SAS test, a simple polygraph test, etc.) is often performed before the overnight polysomnographic test. Patent Document 1 discloses a portable sleep evaluation device for a screening test.

JP 2014-008159 A

  Similar to the Holter electrocardiograph, the portable sleep evaluation device is a small device lent to a subject from a medical institution, and generally operates on a battery. However, in the case of a Holter electrocardiograph, measurement and recording (hereinafter simply referred to as recording) is started when the subject is worn by a medical institution, whereas in the case of a portable sleep evaluation device, the subject is examined. Recording is not performed until the person goes to sleep, and is in a standby state. In the standby state, the battery is operated in the power saving mode in order to save the battery. However, the consumption of the battery cannot be completely eliminated, and the recording is not necessarily performed on the rental date.

  In the case of a Holter electrocardiograph, recording is often performed once, but in the case of a portable sleep evaluation device, recording may be performed a plurality of times. In addition, there may be a case where the interval between recordings is two days or more. As described above, in the case of the portable sleep evaluation device, in combination with various operation methods, the battery voltage is sufficient to complete the recording at the start of recording because the battery voltage is sufficient at the time of lending in a medical institution. There is no guarantee that will remain.

  Therefore, when the recording start instruction is detected, the battery voltage is measured. If the voltage is higher than a predetermined voltage, the recording is started, and if the voltage is lower than the predetermined voltage, the recording is not performed. If the elapsed time from the end of recording is equal to or longer than a predetermined time, recording is not performed.

  However, since the battery voltage is not always stable, there is a case where correct determination cannot be made with the configuration that determines whether or not recording is possible based on the voltage value measured when the recording start instruction is detected. Further, the elapsed time from the end of the previous recording does not take into account the elapsed time from the start of the apparatus (at the time when the battery is installed in the medical institution) or the operation performed during that time. Therefore, for example, when the elapsed time from the start of the device to the start of the previous recording is long, even if the elapsed time from the end of the previous recording is less than a predetermined time, the voltage is insufficient and normal recording is performed. There are cases where it cannot be done.

  The present invention has been made in view of such a problem of the prior art, and its main purpose is to determine whether or not a new recording operation can be started with a simple configuration and taking into consideration the standby time. A biological signal recording apparatus and a control method thereof are provided.

  The above-described object is a biological signal recording apparatus that records biological signal data for evaluating sleep of a subject, and an elapsed time from a predetermined event before the recording of the biological signal data is first started. When the recording start instruction is detected and the recording start instruction is detected, it is determined whether or not the elapsed time is equal to or longer than a predetermined time. A biological signal recording apparatus comprising: control means for controlling recording means to start recording of biological signal data if the elapsed time is not determined to be equal to or longer than a predetermined time without starting recording Achieved by:

  With such a configuration, according to the present invention, it is possible to provide a biological signal recording apparatus and a control method thereof capable of determining whether or not a new recording operation can be started with a simple configuration and considering a standby time. Can do.

It is a figure which shows the function structural example of the portable sleep evaluation apparatus as an example of the biosignal recording device which concerns on embodiment of this invention. It is a flowchart for demonstrating the operation example of the portable sleep evaluation apparatus which concerns on embodiment of this invention.

Hereinafter, the present invention will be described in detail based on exemplary embodiments with reference to the drawings.
FIG. 1 is a block diagram illustrating a functional configuration example of a portable sleep evaluation apparatus (hereinafter simply referred to as a sleep evaluation apparatus) 100 as an example of a biological signal recording apparatus according to an embodiment of the present invention. The sleep evaluation device described here is a so-called simple polygraph inspection device, which measures a biological signal for evaluating the sleep of the subject and records the biological signal data. In this specification, a biological signal means a signal representing a state or activity of a living body. The biological signal is converted into a format that can be handled by the device using sensors, etc., such as body temperature, breathing, pulse, and snoring, as well as signals that are directly detected as electrical signals, such as electrocardiogram signals and electromyogram signals. Signal.

(Constitution)
In the sleep evaluation apparatus 100 according to the present embodiment, the SpO ₂ sensor 101 is a transmission sensor that measures arterial blood oxygen saturation (SpO ₂ ) with, for example, the fingertip of the subject. The cannula 102 has an opening in the vicinity of the nostril of the subject, and is used for detecting the nasal respiratory waveform and snoring sound of the subject by the connected pressure sensor 106. The chest / abdomen sensor 103 is a sensor for detecting a subject's breathing effort movement.

  The electrocardiogram electrode 104 is an electrode for detecting, for example, a monopolar or bipolar two-channel electrocardiogram signal. The acceleration sensor 105 is a sensor for determining the posture of the subject (for example, right-side-down position, left-side-down position, supine position, prone position, and standing position) and detecting body movement.

  The memory 107 is a memory used by the control unit 110 for work. For example, the memory 107 is used as a buffer for temporarily storing measured biological signal data and as a video memory for the display unit 108. The nonvolatile memory 113 is a non-removable built-in recording medium for recording measured biosignal data, and is a NAND flash memory in this embodiment. The display unit 108 includes, for example, a liquid crystal display (LCD), and displays the operation status of the apparatus, measurement waveforms, user information, GUI, and the like.

  The control unit 110 includes, for example, one or more programmable processors (hereinafter referred to as CPU), a rewritable ROM, and a RAM. The control unit 110 loads the program stored in the ROM into the RAM and executes the program by the CPU, thereby controlling the operation of each unit of the sleep evaluation device 100 and realizing the function of the sleep evaluation device 100. In addition to programs executed by the CPU, the ROM stores various setting values, GUI data, and the like. The CPU may read a program stored in the nonvolatile memory 113 into the memory 107 and execute it.

  The control unit 110 includes the total recordable time, the recorded time and / or the remaining recordable time of the sleep evaluation apparatus 100, the longest recordable time per time, the maximum recordable number of times, the recorded number of times and / or the remaining recordable number of times. Such values relating to the recording operation are held in the RAM or the memory 107 in the control unit 110 and updated in accordance with the recording operation.

  The input unit 109 is a generic name for input devices used by a user (medical worker and subject) to input various instructions and settings. The input unit 109 is an input that does not require a physical operation, such as an input device that recognizes an instruction by voice recognition, as well as an input device that requires a physical operation, such as a switch, a button, a dial, or a touch panel. Equipment can be included. An instruction input through the input unit 109 is detected by the control unit 110, and the control unit 110 executes an operation according to the instruction.

  Note that sound generation means such as a speaker may be provided to notify the user of the operation state of the apparatus, the occurrence of an error, an operation procedure, and the like by voice or the like.

  Under the control of the control unit 110, the recording unit 111 records the measured biological signal data on a memory card (MC) 1110 which is an example of a removable recording medium, and reads the data recorded on the memory card 1110. . As will be described later, the sleep evaluation apparatus 100 according to the present embodiment can record the measured biological signal data in both the nonvolatile memory 113 and the memory card 1110. The memory card 1110 uses a NAND flash memory.

The external I / F 112 is an interface for wired or wireless communication with an external device such as a personal computer. There are no particular restrictions on the types of external devices that can be connected and the communication protocol with external devices.
The power supply unit 114 includes a primary battery or a secondary battery, and supplies power to each unit including the control unit 110. The control unit 110 can measure the power supply voltage (battery voltage) of the power supply unit 114.

(Recording operation)
Next, the biosignal data recording operation in the sleep evaluation device of this embodiment will be described. Since the purpose here is to explain the overall operation during recording, various sensors 101, 103 to 105 and a cannula 102 are mounted in advance on a predetermined part of the subject, and the recording start condition Is assumed to be satisfied.

  When a recording start instruction is input from the input unit 109, the control unit 110 writes the recording start date and time in the memory 107, and starts the measurement of the biological signal and the recording operation of the biological signal data. The control unit 110 applies predetermined processing such as A / D conversion and filter processing to biological signals obtained from the various sensors 101 and 103 to 106 to generate biological signal data. The control unit 110 sequentially writes the generated biological signal data in the memory 107.

  A pressure sensor 106 connected to the cannula 102 converts the airflow from the nasal or oral nasal cannula into an electrical signal. The control unit 110 applies amplification processing and filter processing to the electric signal, and the signal obtained from the pressure sensor 106 indicates a signal indicating a change in mask pressure by a frequency component, a signal indicating a respiratory waveform, and a tracheal sound (snoring). Separate into signals. If the cannula is a nasal cannula, a nasal respiratory waveform is obtained. If the cannula is an nasal cannula having an opening near the mouth, an oral nasal respiratory waveform is obtained.

  For example, the control unit 110 obtains, as a basic signal, a signal obtained by applying a low-pass filter having a cutoff frequency of about 500 Hz to the electrical signal obtained from the pressure sensor 106. And the control part 110 calculates | requires the signal which applied the low-pass filter which has 2-3 Hz further as a cutoff frequency with respect to a basic signal as a signal of mask pressure. Further, the control unit 110 obtains a signal obtained by applying a high-pass filter having a cutoff frequency of 0.01 to 0.1 Hz and a low-pass filter having a cutoff frequency of 2 to 3 Hz as a respiratory signal with respect to the basic signal. Further, the control unit 110 obtains a signal obtained by applying a high-pass filter having a cutoff frequency of 0.01 to 0.1 Hz and a low-pass filter having a cutoff frequency of 150 to 200 Hz as a tracheal sound signal with respect to the basic signal. These are examples of methods for separating various signals from the signal of the pressure sensor 106, and the frequency characteristics of the filter may be changed or other methods may be used.

In addition, the control unit 110 transmits a respiratory-related signal such as a signal indicating a change in mask pressure (mask pressure signal), a signal indicating a respiratory waveform (respiration signal), and a signal indicating tracheal sound (snoring) (tracheal sound signal), respectively. Convert from voltage value to pressure value [cmH ₂ O] and record.
The respiratory effort waveform is obtained from the chest / abdomen sensor. In this embodiment, the suprasternal fossa waveform is not measured, but it may be configured to acquire the suprasternal fovea waveform.

The control unit 110 sequentially writes the biological signal data in the memory 107 and performs an analysis process on the biological signal data. In the analysis process, the presence or absence of apnea or hypopnea interval, duration and frequency, body position and its change, presence or absence of decrease of SpO ₂ by more than a predetermined percentage (eg 2 to 4%), duration and frequency, pulse rate (maximum , Min, average) etc. For example, in the case of apnea, in which the breathing has stopped for 10 seconds or more, in the case of hypopnea, the control unit 110 performs SpO ₂ in addition to the apparent decrease in ventilation (a state in which a decrease of 30% or more from the amplitude of normal breathing is 10 seconds or more). Can be detected as a state of 3 to 4% or more. Note that the analysis process can be performed using a known method, and therefore, further description thereof is omitted. The analysis process of the biological signal data may be executed by an external device.

  The control unit 110 records the biological signal data stored in the memory 107 as a data file in the nonvolatile memory 113 in a predetermined order by a predetermined unit time (first time). If recording to the memory card 1110 is set, the control unit 110 also supplies the biological signal data to the recording unit 111 and records the biological signal data as a data file on the memory card 1110. The control unit 110 also records the analysis result data in the nonvolatile memory 113 (the memory card 1110 further according to the setting) every time biosignal data for a predetermined time (second time) longer than the first time is recorded. ). The control unit 110 records the biological signal data and the analysis result data as data files of the same format in the nonvolatile memory 113 and the memory card 1110.

  The control unit 110 can also display on the display unit 108 that the recording is in progress, the recording time, the scheduled recording end date and time, the attachment state of the sensor, some measured values, and the like.

  The control unit 110 continuously executes the above-described measurement process, analysis process, and recording process until it is determined that the recording end condition is satisfied. For example, when the recording unit reaches an automatic recording end time (for example, 8 hours) when the recording time has been set, or when an input of a recording end instruction is detected through the input unit 109, the remaining recordable time becomes zero. In this case, it can be determined that the recording end condition is satisfied, for example, when the recorded time reaches the total recordable time or when an abnormality relating to the apparatus is detected.

(Recordability judgment operation)
Next, the recording availability determination operation of the sleep evaluation device 100 of the present embodiment will be described together with a series of operations from the start-up, using the flowchart shown in FIG.
The flowchart of FIG. 2 is started when the sleep evaluation apparatus 100 is activated. In addition, although the sleep evaluation apparatus 100 of this embodiment shall start when a battery is mounted | worn with the power supply part 114, the structure started by operation of the input part 109 may be sufficient.

  In S101, the control unit 110 measures the voltage (battery voltage) of the power supply unit 114 in a startup process such as displaying a startup screen on the display unit 108. In order to improve the measurement accuracy, the control unit 110 may perform measurement a plurality of times and obtain the average of the measurement values as the battery voltage. Then, the control unit 110 determines whether or not the battery voltage is equal to or higher than a predetermined threshold value. If it is determined that the battery voltage is equal to or higher than the threshold value, the process proceeds to S105. Here, the threshold value of the battery voltage can be determined according to a period for guaranteeing a normal recording operation. The method for determining the threshold will be described in detail later. The control unit 110 also stores information indicating the date and time when the battery voltage is determined in the memory 107.

  In S103, the control unit 110 determines that the battery voltage is insufficient, executes an error end process, and ends the operation. At this time, the control unit 110 may cause the display unit 108 to display a message for notifying the user that the battery voltage is insufficient.

  In step S105, the control unit 110 displays a recording standby screen on the display unit 108, and advances the process to step S107. The recording standby screen may include, for example, a message explaining an operation method for starting recording, information such as how many times the next recording is recorded, and how many hours the set automatic recording end time is. it can.

  In S107, the control unit 110 determines whether or not a menu shift instruction through the input unit 109 has been detected. If it is determined that the menu shift instruction has been detected, the process proceeds to S123. If not, the process proceeds to S109.

  In S109, the control unit 110 determines whether a recording start instruction through the input unit 109 has been detected. If it is determined that the recording start instruction has been detected, the process proceeds to S133. If not, the process proceeds to S111.

  In S111, the control unit 110 determines whether or not a predetermined time has elapsed since the recording standby screen was displayed in S105. If it is determined that the time has elapsed, the process proceeds to S113. If it is not determined that the time has elapsed, the process proceeds to S107. Return processing.

  In step S113, the control unit 110 shifts the operation mode of the sleep evaluation apparatus 100 from the recording mode to the power saving mode. The power saving mode is a so-called sleep mode, and is an operation mode that suppresses battery consumption by maintaining only a predetermined event detection function such as detection of an operation on the input unit 109, for example. Specifically, the power supply to the display unit 108 can be stopped, for example, the power supply part can be reduced, and the operation speed (CPU operation clock) of the control unit 110 can be reduced. It is not limited. Then, the control unit 110 advances the process to S115 and waits until an operation on the input unit 109 is detected.

  When an operation on the input unit 109 is detected in S115, the control unit 110 advances the process to S117, returns the operation mode to the recording mode, displays the recording standby screen on the display unit 108, and advances the process to S119.

  In S119, the control unit 110 determines whether or not a recording start instruction through the input unit 109 has been detected. If it is determined that the recording start instruction has been detected, the process proceeds to S133. If not, the process proceeds to S121.

  In step S121, the control unit 110 determines whether a predetermined time has elapsed since the recording standby screen was displayed in step S117. If it is determined that the predetermined time has elapsed, the process returns to step S113. If not, the process returns to step S119. .

In S123, the control unit 110 displays the menu screen on the display unit 108, and advances the process to S125.
In S125, the control unit 110 determines whether or not a recording mode transition instruction through the input unit 109 is detected. If it is determined that the recording mode shift instruction is detected, the process proceeds to S127.

  In S127, the control unit 110 measures and determines the battery voltage in the same manner as in S101. If the battery voltage is determined to be equal to or higher than a predetermined threshold, the process proceeds to S117. Proceed. The control unit 110 also stores information indicating the date and time when the battery voltage is determined in the memory 107.

  In S125, the control unit 110 determines whether or not an instruction other than the recording mode transition instruction is detected through the input unit 109. If it is determined that the instruction is detected, the process proceeds to S131, and if it is not determined, the process proceeds to S125. Return processing. The instruction other than the recording mode transition instruction is not particularly limited, but may be a setting screen calling instruction, a memory card initialization instruction, or the like.

  In S131, the control unit 110 executes a process according to the instruction detected in S129, and returns the process to S123.

  When a recording start instruction is detected, in step S133, the control unit 110 determines whether the recording process can be started according to the detected instruction. In this embodiment, the control unit 110, when the elapsed time from the predetermined event before the first recording of the biological signal is detected until the recording start instruction is detected is equal to or longer than the predetermined time. If it is determined that recording is not possible, the process proceeds to S135. If the elapsed time is not longer than the predetermined time, it is determined that recording is possible and the process proceeds to S137.

  In the present embodiment, a predetermined event before the first recording of the biological signal is set as a battery voltage determination process executed immediately before the first recording of the biological signal. In the example shown in FIG. 2, the battery voltage is determined at start-up (S101), or the battery voltage is determined when an instruction to shift to the recording mode from the menu screen is detected (S127). Therefore, the control unit 110 stores information on the execution date and time in the memory 107 when executing these determination processes. However, it may be an event other than the battery voltage determination process, for example, another event such as when the apparatus is activated.

In step S135, the control unit 110 executes error processing in the same manner as in step S103, and ends the operation.
In step S137, the control unit 110 performs a biological signal measurement and recording process. The operation in S137 is as described above.

  In S139, the control unit 110 determines whether or not the recording end condition is satisfied. If it is determined that the recording end condition is satisfied, the measurement and recording process is terminated and the process proceeds to S141. If not satisfied, the process returns to S137. Continue the measurement, analysis, and recording process.

  In S141, the control unit 110 determines whether or not recording of a biological signal is further possible based on the number of recorded biological signals, the recorded time, and the set recording time. If YES in step S113, the process ends if it is not determined possible. Note that the same determination as in S133 may be performed when determining whether or not new recording is possible in S141. In this case, if the elapsed time from the event at the end of recording is equal to or greater than the threshold, it is determined that new recording is impossible, and the process may proceed to S135. In addition, the determination based on the elapsed time from the event is prioritized over the determination based on the recording count and the recording time.

  As described above, according to the present embodiment, it is determined whether or not the biosignal can be recorded according to the recording start instruction according to the elapsed time from the predetermined event before the first recording is started. Since the determination is not based on the measured value of the power supply voltage (battery voltage), the determination result does not vary even when a power supply whose voltage is not stable is used. In addition, since it is possible to determine whether or not recording is possible simply by comparing the elapsed time with a threshold value, processing such as measuring the power supply voltage multiple times to obtain an average value is unnecessary, and the amount of computation and time required for the determination are small. I'm sorry.

  In particular, when a predetermined event is a power supply voltage determination process executed most recently when recording is first started, whether or not recording is possible is determined based on an elapsed time from when the power supply voltage passed the check. For this reason, for example, when the standby time in the power saving mode becomes long, it is possible to control not to perform recording. Further, if the predetermined event is the time when the apparatus is activated, it is possible to determine whether or not recording is possible in consideration of the standby time from the time of activation. In addition, as mentioned above, when the battery is installed at the start-up, and considering that it is a general operation to install a new or fully charged battery, the power supply voltage substantially passed the check first. This can be regarded as the determination of whether or not recording is possible in consideration of the elapsed time from the time.

  Here, a specific example will be described. For example, as a specification of the sleep evaluation apparatus 100, it is assumed that the total recordable time is 24 hours, and one of 24-hour recording once, 12-hour recording twice, and 8-hour recording three times can be selected. Then, when 72 hours or more have passed since a predetermined event, control is performed so that new recording is not permitted. This threshold can guarantee that recording can be completed normally even if a recording operation with the largest power consumption (24-hour recording in this example) is started immediately before the elapsed time from a predetermined event becomes the threshold, for example. Determine as value.

  Therefore, when the recording is set once for 24 hours, when the recording start instruction is detected in S109 or S119, the elapsed time from the date and time of the voltage determination process most recently executed in S101 or S127 is 72. If it is less than the time, recording is started, and if it is 72 hours or more, recording is not performed.

  In addition, when the 12-hour recording is set twice, the elapsed time from the date and time of the voltage determination process most recently executed in S101 or S127 when the first recording start instruction is detected in S109 or S119. If it is less than 72 hours, recording is started, and if it is 72 hours or more, recording is not performed. If recording has been performed, whether or not new recording is possible is determined in S141, but since the second recording is still possible here, the process proceeds to S113. Further, it is assumed that the elapsed time from the event is less than the threshold time when S141 is first executed.

  After that, when the second recording start instruction is detected in S109 or S119, if the elapsed time from the date and time of the voltage determination process most recently executed in S101 or S127 is less than 72 hours, the recording is started. If it is 72 hours or more, recording is not performed. Here, the event occurrence date and time used in the determination of the elapsed time when the second recording instruction is detected is the event occurrence date and time used in the determination of the elapsed time when the first recording start instruction is detected. Is the same.

When the second recording is executed, the recording for the total recordable time (24 hours) is performed in the determination of S141 (or the recording for the set time is completed), so the new recording is performed. Is determined to be impossible. Even if the elapsed time from the event is less than the threshold time at the time of determination in S141, it is determined that new recording is not possible.
The determination process in the case where the setting for three times of 8-hour recording is made is the same as the case of the setting for two times of 12-hour recording, and thus the description thereof is omitted.

  As described above, according to the present embodiment, a new recording operation is started in a biological signal recording apparatus such as a sleep evaluation apparatus in which the standby time from activation to the start of recording and the standby time between recordings are indefinite. Whether or not it is possible is determined based on the elapsed time from the event before starting the first recording. Therefore, whether or not a new recording operation can be started can be determined with a simple configuration and in consideration of standby time, and is particularly useful in a sleep evaluation apparatus that uses a power source such as a battery that does not necessarily have a stable voltage.

  The biological signal recording apparatus according to the present invention is realized as a program (application software) that causes a general-purpose information processing apparatus such as a smartphone or a tablet terminal to execute the operation of the flowchart shown in FIG. You can also Therefore, such a program and a storage medium storing the program (an optical recording medium such as a CD-ROM or DVD-ROM, a magnetic recording medium such as a magnetic disk, a semiconductor memory card, etc.) also constitute the present invention. .

  DESCRIPTION OF SYMBOLS 100 ... Portable sleep evaluation apparatus, 110 ... Control part, 111 ... Recording part, 1110 ... Memory card, 113 ... Non-volatile memory, 114 ... Power supply part

Claims (6)

A biological signal recording device for recording biological signal data for evaluating a subject's sleep,
An acquisition means for acquiring an elapsed time from a predetermined event before first starting recording of biosignal data;
When a recording start instruction is detected, it is determined whether or not the elapsed time is equal to or longer than a predetermined time. If the elapsed time is determined to be equal to or longer than the predetermined time, recording of the biological signal data is started. Without controlling the recording means to start recording the biological signal data if the elapsed time is not determined to be more than the predetermined time,
A biological signal recording apparatus comprising:   The biological signal recording apparatus according to claim 1, wherein the predetermined event is determination of a power supply voltage of the biological signal recording apparatus when the biological signal recording apparatus is activated.   The biological signal recording according to claim 1, wherein the predetermined event is a determination of a power supply voltage of the biological signal recording apparatus executed immediately before the first start of recording of the biological signal data. apparatus.   Each time the recording start instruction is detected, the control means does not determine that the elapsed time is equal to or longer than the predetermined time, and the recording time or the number of recordings of the already recorded biological signal data is determined in advance. The biological signal recording apparatus according to any one of claims 1 to 3, wherein the recording unit is controlled to start recording of the biological signal data if the threshold value is less than a predetermined threshold value. . A control method for a biological signal recording apparatus for recording biological signal data for evaluating sleep of a subject,
An acquisition step of acquiring an elapsed time from a predetermined event before first starting recording of biosignal data;
A determination step of determining whether or not the elapsed time is equal to or longer than a predetermined time when a recording start instruction is detected;
If it is determined that the elapsed time is equal to or longer than the predetermined time, the recording of the biological signal data is not started, and if the elapsed time is not determined to be equal to or longer than the predetermined time, the recording of the biological signal data is performed. A control step for controlling the recording means to start;
A control method for a biological signal recording apparatus, comprising:   The program for functioning the computer which a biosignal recording device has as an acquisition means and control means of a biosignal recording device given in any 1 paragraph of Claims 1-4.

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