JP4855803B2 - Respiratory function testing device - Google Patents

Description

  The present invention relates to a respiratory function testing device that measures vital capacity and forced vital capacity based on measurement of respiratory capacity.

  In general, examination of vital capacity and effort vital capacity representing lung capacity in respiratory function examination is particularly important. For example, as shown in Patent Document 1, exhalation or inspiration (hereinafter, exhalation or inspiration is referred to as breathing as a whole). ) Is measured by a respiratory flow measuring device that measures the ventilation volume.

JP 2000-298043 A (page 4, FIG. 6, FIG. 7, FIG. 8, FIG. 12)

  The above-mentioned “spiral capacity” includes inspiratory vital capacity and expiratory vital capacity, and is generally measured by having the subject perform maximum expiratory and maximum inspiration with slow breathing. Inspiratory vital capacity is the difference in volume from the maximum expiratory position where it is impossible to exhale further to the maximum inspiratory position where it is not possible to inhale anymore after continuing to inhale. This is the difference in volume from the maximum inspiratory position to the maximum expiratory position in the state where the user continues to exhale and can no longer exhale. Usually, among the test results performed several times, the largest test result is used as the vital capacity irrespective of the inspiratory vital capacity or the expiratory vital capacity. The “forced vital capacity” is a difference in capacity when the maximum inspiratory position is reached at a stroke and the maximum expiratory position is reached. Furthermore, the capacity called up in the first second at this time is defined as “one second amount”, which is also an important measurement item.

  The above vital capacity and effort vital capacity are those that are highly reliable by having the subject perform maximum exhalation and maximum inspiration, and are unreliable if the subject does not make maximum effort The value is measured. In the respiratory function testing apparatus such as Patent Document 1 described above, since there is no function for causing the subject to perform maximum exhalation and maximum inspiration, that is, a function for prompting breathing to the limit of the subject, There was a problem of not making maximum efforts. In addition, there is a problem that the degree of effort of the subject varies due to the instruction of exhalation or inhalation being performed based on the standards of each doctor or each laboratory technician.

  The present invention has been made based on such a background, and an object thereof is to have a function for causing a subject to perform maximum expiration and maximum inspiration, and to provide confidence in spirometry or forced spirometry. An object of the present invention is to provide a respiratory function testing device that enhances the performance.

  The present invention adopts the following means in order to solve the above problems. The reference numerals used in the description of the best mode for carrying out the invention and the drawings to be described later are appended in parentheses for reference, but the constituent elements of the present invention are not limited to the appended description.

The respiratory function test apparatus (1, 1 ′) of the present invention according to claim 1 is a respiratory function test apparatus that measures expiratory vital capacity and / or inspiratory vital capacity based on measurement of respiratory capacity,
Measure the respiratory flow, which is the flow of exhaled air or inspired,
The first notification (S13: Exhale until the end, S14: Exhale) that prompts exhalation is performed until the first time point when the respiratory flow rate falls below a predetermined threshold (1 ml / s),
Next, from the first point of time, the second notification that prompts inspiration (S16: I suck my whole chest, S17: Inhale-) will be below the predetermined threshold (1 ml / s). Until the second point,
Next, from the second time point, the third notification (S19: Exhale until the end, S20: Exhale) that prompts exhalation , and then the respiratory flow falls below a predetermined threshold (1 ml / s) The process is performed up to the third time point.

The respiratory function test apparatus (1, 1 ′) of the present invention according to claim 2 is a respiratory function test apparatus for measuring expiratory vital capacity and / or inspiratory vital capacity based on measurement of respiratory capacity,
Measure the respiratory flow, which is the flow of exhaled air or inspired,
First notification (S33: I suck the whole chest, S34: Suction-) that prompts inspiration is performed until the first time point when the respiratory flow rate is below a predetermined threshold (1 ml / s),
Next, the second notification (S36: Exhale until the end, S37: Exhale), which prompts exhalation, from the first time point, the respiratory flow rate then falls below a predetermined threshold (1 ml / s) Until the second point,
Next, from the second point in time, the third notification (S39: sucking the whole chest, S40: sucking) that prompts inspiration is followed, and the respiratory flow rate falls below a predetermined threshold (1 ml / s). The process is performed up to the third time point.

The respiratory function test apparatus (1, 1 ′) of the present invention according to claim 3 is the respiratory function test apparatus according to claim 1,
Measuring the difference between the maximum expiratory position between the first time point and the second time point and the maximum inspiratory position between the second time point and the third time point as the inspiratory vital capacity,
A difference between the maximum inspiratory position and the maximum expiratory position after the third time point is measured as the expiratory vital capacity.

A respiratory function test apparatus (1, 1 ′) according to the present invention according to claim 4 is the respiratory function test apparatus according to claim 2,
A difference between a maximum inspiratory position between the first time point and the second time point and a maximum expiratory position between the second time point and the third time point is measured as the expiratory vital capacity,
The difference between the maximum expiratory position and the maximum inspiratory position after the third time point is measured as the inspiratory vital capacity.

The respiratory function test apparatus (1, 1 ') of the present invention according to claim 5 is a respiratory function test apparatus that measures forced vital capacity based on measurement of respiratory capacity,
Measure the respiratory flow, which is the flow of exhaled air or inspired,
The first notification to encourage the intake air (S53: Yo sucks full chest, S54: suck over), and had a row until the first of the time the breath flow rate is equal to or less than a predetermined threshold (1ml / s),
Next, a call notification (S56: spit out at a stroke) is made to prompt a call,
Next, a second notification (S57: Vomit-) for prompting continuation of exhalation is performed after the call notification until a second time point at which the respiratory flow rate is equal to or lower than a predetermined threshold (1 ml / s). It is characterized by.

The respiratory function test apparatus (1, 1 ′) of the present invention according to claim 6 is the respiratory function test apparatus according to claim 5 ,
The difference between the maximum inspiratory position between the first time point and the second time point and the maximum expiratory position after the second time point is measured as the forced vital capacity.

The respiratory function test apparatus (1, 1 ′) of the present invention according to claim 7 is the respiratory function test apparatus according to claim 5 or 6 ,
A variation amount of the respiratory volume in one second from a time point when the maximum inspiratory position between the first time point and the second time point is reached is measured as a one second amount.

The respiratory function test apparatus (1, 1 ′) according to the present invention according to claim 8 is the respiratory function test apparatus according to claim 1 selected from claims 1 to 7 ,
Prior to the first notification, the measurement of the respiratory volume is started, and a notification for prompting breathing at rest (S11, S31, S51: Please perform a comfortable breathing normally),
The first notification is performed after a predetermined time (30 seconds) has elapsed from the start of the measurement.

According to the respiratory function testing device of the present invention according to claim 1, the first notification, the second notification, and the third notification are performed on the basis of the time when the respiratory flow rate is equal to or less than a predetermined threshold value. Appropriate notification according to the time transition of breathing can be performed. That is, by detecting the maximum expiration or maximal inspiration of each subject properly prompting the inspiration or expiration can be performed with high reliability spirometry.

According to the respiratory function testing device of the present invention according to claim 2, the first notification, the second notification, and the third notification are performed based on the time point when the respiratory flow rate is equal to or less than a predetermined threshold value. Appropriate notification according to the time transition of breathing can be performed. That is, it is possible to detect the maximum exhalation or maximum inspiration of each subject, appropriately promote the inspiration or exhalation, and perform highly reliable vital capacity measurement.

According to the respiratory function test apparatus of the present invention according to claim 3 , it is possible to accurately measure the inspiratory vital capacity and the expiratory vital capacity.

According to the respiratory function test apparatus of the present invention according to claim 4 , the expiratory vital capacity and the inspiratory vital capacity can be accurately measured.

According to the respiratory function test apparatus of the present invention according to claim 5 , the first notification, the call notification, and the second notification are performed on the basis of the time when the respiratory flow rate becomes a predetermined threshold value or less, respectively. It is possible to perform appropriate notification according to the time transition. That is, it is possible to detect the maximum exhalation or the maximum inspiration of each subject, appropriately promote the inspiration or exhalation, and perform highly reliable forced vital capacity measurement.

According to the respiratory function test apparatus of the present invention according to claim 6 , it is possible to accurately measure the forced vital capacity.

According to the respiratory function test apparatus of the present invention according to claim 7 , the amount of one second can be accurately measured.

According to the respiratory function test apparatus of the present invention according to claim 8 , the subject is encouraged to breathe at rest, and the first notification is started after performing the predetermined measurement at rest. Measurement can be performed according to the procedure.

[1. (Configuration of respiratory function testing device)
Embodiments of the respiratory function testing device of the present invention will be described below with reference to the drawings. 1 (a) to 1 (d) are external views showing the external appearance of the respiratory function testing device 1, FIG. 1 (a) is a plan view thereof, FIG. 1 (b) is a left side view thereof, and FIG. Is a front view, and FIG. 1 (d) is a right side view. FIG. 2 is a functional block diagram showing functions of the respiratory function testing device 1. The respiratory function testing device 1 of the present invention includes a main body 15 which is a casing, a flow sensor 5 which can be attached to and detached from the main body 15 and the like. The main body 15 includes an operation key 4, a display 7, a printer 8, a control circuit, a power supply circuit, and the like. On the upper part of the main body 15, a carrying handle 18 formed integrally therewith is formed. The handle 18 is for carrying the respiratory function testing apparatus 1 by grasping it with a hand.

  The flow sensor 5 is detachably mounted on the main body 15 and is used separately from the main body 15 during use. The flow sensor 5 generates a differential pressure proportional to the respiratory flow rate, and includes a blowing port 17 through which a subject blows in addition to the mouth. When the subject blows in through the air inlet 17, a differential pressure is generated in the flow sensor 5, and this differential pressure is sent to the control circuit in the main body 15 through the differential pressure tube. As shown in FIG. 2, the control circuit measures the differential pressure generated in the flow sensor 5 and converts it into an analog signal, and converts the analog signal output from the pressure sensor 10 into a digital signal A. The A / D converter 11 and the CPU 12 for processing the digital signal converted by the A / D converter 11 are included.

  The display 7 and the printer 8 display or print out data detected by the flow sensor 5 and numerical values calculated by the CPU 12 of the control circuit, as will be described later, and are visually recognized by operators such as doctors and laboratory technicians. It is the output visual recognition means for doing. The speaker 20 is an audio output means for prompting the subject to exhale or inhale with an audio guide. The power connector 2 is for inserting a connector of an AC power cable (not shown). As shown in FIG. 1A, the power connector 2 is arranged on the back surface of the main body 15 and corresponds to the connector shape of the AC power cable. It has a shape.

  By connecting a connector of an AC power cable connected to an external AC power source (for example, 100 V) to the power connector 2, an AC voltage is input to a power supply board inside the main body. The power switch 3 is a switch for supplying a DC voltage to each electrical component inside the main body. As shown in FIG. 1 (d), the power switch 3 is arranged on the right side surface of the main body section 15, and is manually switched on / off. It is done. By turning this on, the DC voltage converted from the AC voltage in the power supply board is supplied to each electrical component inside the main body. At this time, a DC / DC converter is used to obtain a voltage value corresponding to the drive voltage of each electrical component.

  The operation key 4 is used when selecting a measurement item or setting a measurement period. In this example, as shown in FIG. 1 (c), it is arranged on the upper surface of the main body 15 and comprises ten numeric keys 0 to 9, direction keys for selecting measurement items, and the like. Also included is a print key operated when printing out data output to the display 7.

  As shown in FIG. 1C, the flow sensor 5 is provided outside the main body, and one end of a differential pressure tube 16 composed of two tubes is connected and the other end is a differential pressure tube connection port of the main body 15. 6 and 6 are connected. The flow sensor 5 is detachable from the main body 15 and is housed in the holder of the main body 15 as shown in FIG. 1 (c) when not in use. Is done. As will be described later, a mouthpiece includes a mouthpiece attached to a blowing port 17 provided in the flow sensor 5 while the subject holds the flow sensor 5 and breathes in accordance with instructions from a doctor or a laboratory technician. Various measurements are performed.

  A resistor is disposed in the flow tube of the flow sensor 5. This resistor is disposed, for example, such that a film-like resistor blocks the flow of gas in the flow tube. When a gas flow occurs in the flow tube, a differential pressure is generated before and after the resistor. The pressure before and after the resistor is transmitted to the differential pressure tube connection ports 6 and 6 through the pressure ports arranged before and after the resistor and the differential pressure tube 16 connected to each of the pressure ports. It is the composition which becomes. That is, one of the two tubes constituting the differential pressure tube 16 transmits the pressure before the resistor to one tube connection port 6 connected to the tube, and the other connects the pressure after the resistor to the tube. Is transmitted to the other tube connection port 6. On the main body 15 side, the flow rate of the gas flowing in the flow tube, that is, the respiratory flow rate can be measured by detecting the differential pressure at the tube connection ports 6 and 6. This respiratory flow rate is also called a respiratory flow rate. Note that this type of flow sensor is a so-called differential pressure type and is widely used.

  The pressure sensor 10 outputs an analog signal proportional to the detected differential pressure. In this example, it is a semiconductor differential pressure sensor, which outputs a voltage proportional to the differential pressure detected by the differential pressure detection unit for detecting the differential pressure between the tube connection ports 6 and 6. An output terminal is provided. In this example, the voltage is output as an analog signal. However, the present invention is not limited to this, and a current proportional to the differential pressure detected as an analog signal may be output.

  The A / D converter 11 is for converting an analog electronic signal into a digital signal. In this example, it is a semiconductor A / D converter, which converts an analog signal output from the output terminal of the pressure sensor 10 into a digital signal that can be processed by the CPU 12 to be described later, and outputs the digital signal from the digital output terminal.

  The CPU 12 executes the measurement program stored in the EEPROM 13 by using the RAM 14 as a work area, thereby controlling the operation of each connected component or receiving a signal from each component to perform various processes. Is to do. In this example, a process for calculating a respiratory flow rate is performed based on a digital signal that is an output from the A / D converter 11 and indicates a value proportional to the differential pressure. This calculation is performed based on a relational expression between a differential pressure and a respiratory flow rate that are stored in advance. That is, the differential pressure is specified from the digital signal, and the specified differential pressure is input to the relational expression to calculate the respiratory flow rate. In this example, the respiratory volume is calculated by integrating the respiratory flow rate.

  The flow sensor 5, the differential pressure tube 16, the pressure sensor 10, the A / D converter 11, and the CPU 12, and the processing program executed by the CPU 12 are the measurement means for measuring the air flow velocity, pressure, flow rate, volume, and the like. It is an example, and other measurement methods may be used as long as they measure the respiratory flow rate and the respiratory volume. In this example, it is the difference in volume from the maximum expiratory level where it is impossible to exhale further by this measuring means to the maximum inspiratory position where it is not possible to inhale any more after continuing to inhale. “Inspiratory vital capacity”, “exhaled vital capacity”, which is a difference in volume from the maximum inspiratory position to the maximum expiratory position in a state where the patient can continue to exhale and can no longer exhale, is measured. Then, among the test results performed three times, the largest test result is measured as “spiratory capacity” regardless of the inspiratory vital capacity or expiratory vital capacity. It also measures the forced vital capacity, which is the difference in capacity when it is called from the maximum inspiratory position at once and reaches the maximum expiratory position, and also measures the amount of 1 second that is the volume that was called in the first second at this time. To do. The data measured here is stored in the RAM 14, and when the measurement is completed, the data stored in the RAM 14 is stored in the EEPROM 13.

  The EEPROM 13, which is a non-volatile memory, stores measurement data as described above, and also stores a measurement program. The measurement program includes a spirometry program and an effort spirometry program. The “notification process by time determination” and the “notification process by flow determination” shown in FIGS. 4 and 6 are a part of the processing performed by the vital capacity measurement program, and the “notification process by time determination” shown in FIG. The “notification process by flow rate determination” is a part of the process performed by the forced vital capacity measurement program. The EEPROM 13 also stores audio data for notification, and this audio data is reproduced by the speaker 20.

  The display 7 is an LCD display, and is provided on the upper surface of the main body 15 as shown in FIG. 1C. Output data is controlled from the CPU 12 via an LCD driver circuit (not shown), and predetermined data is obtained. Is output to the screen. For example, the respiratory capacity curve at the time of vital capacity measurement shown in FIGS. 3 and 5 and the respiratory capacity curve at the time of forced vital capacity measurement shown in FIG. 7 are output. The printer 8 is, for example, a thermal printer, and outputs predetermined data on paper so that the CPU 12 can perform print control via a thermal head driver so that the data can be visually recognized. Print data. The speaker 20 is an audio output means for prompting the subject to exhale or inhale by an audio guide, and outputs audio based on audio data stored in the EEPROM 13 in advance.

  The RS232C connector 9 is a terminal for transmitting and receiving data via an information terminal outside the respiratory function testing device 1 and a cable for RS232C. For example, when transmitting measurement data to an external PC, the RS232C connector 9 is connected to the RS232C connector on the PC side with a cable for RS232C, and the measurement data is transmitted to the PC by performing a predetermined operation with the operation key 4. Send to.

[2. Action of respiratory function test device)
Next, the effect | action of the said respiratory function test | inspection apparatus 1 is demonstrated using FIGS. First, in the initial state, icons of “spiratory capacity measurement” and “forced vital capacity measurement” are displayed on the display 7. When “measurement of vital capacity” is selected by the operation key 4, the vital capacity measurement program is activated and enters a signal input waiting state, that is, a subject's breath detection waiting state.

  When the subject holds the flow sensor 5 in this signal input waiting state, includes the mouthpiece provided in the flow sensor 5 in his mouth, and breathes in accordance with the instructions of the doctor or laboratory technician, the above-described measuring means (The flow sensor 5, the differential pressure tube 16, the pressure sensor 10, the A / D converter 11, and the CPU 12) measure the respiratory flow rate, and further measure the respiratory capacity as an integral value of the respiratory flow rate. The time series data of the respiratory volume measured here is accumulated in the RAM 14 and displayed on the display 7 as a graph with the elapsed time on the horizontal axis and the respiratory capacity on the vertical axis as shown in FIG.

  FIG. 3 is a first example of the time transition of respiratory capacity when spirometry is performed. In general, in spirometry or forced spirometry, this measurement is performed after the rest ventilation measurement. In this rest ventilation measurement, the breath volume, breath volume, breath time, breath time, etc. at rest are measured, and these data are also stored in the RAM 14. Then, after the measurement of the resting ventilation for 30 seconds, the main measurement is performed. As shown in FIG. 3, in this measurement, the maximum expiratory position is first measured, then the maximum inspiratory position is measured, and then the maximum expiratory position is measured. Then, the difference between the first maximum expiratory position and the maximum inspiratory position is measured as the inspiratory vital capacity, and the difference between the maximum inspiratory position and the last maximum expiratory position is measured as the expiratory vital capacity.

  At the time of this vital capacity measurement, a sound is output from the speaker 20 and a notification is made to prompt the subject to exhale or inhale. The notification process will be described with reference to FIG. In this notification process, as shown in FIG. 4A, “notification process by time determination” for performing each notification according to the elapsed time, and as shown in FIG. Two processes of “notification process by flow rate determination” for performing notification are included, and which of the notification processes is performed is set in advance by the operation key 4 or the like.

  In the “notification process by time determination” shown in FIG. 4A, when the input of a signal, that is, the start of breathing of the subject is detected (S10: point A in FIG. 3), “please breathe normally normally. Is output (S11). Next, after waiting for a predetermined time (for example, 1 second), it is determined whether 30 seconds have passed since the notification in S11 (S12). If it is determined in S12 that 30 seconds have not elapsed (N), the process waits again for a predetermined time and performs the determination in S12 again. If it is determined in S12 that 30 seconds have elapsed (Y: point B in FIG. 3), the voice “Shoot to the end” is output (S13), and then the voice “Shoot” is output. Output (S14) and urge the subject to exhale the breath remaining in the lungs.

  For 30 seconds from S11, rest ventilation measurement is performed, and the breath volume, breath volume, breath time, breath time, etc. at rest are measured, and the measurement data is stored in the RAM 14. Then, when 30 seconds have elapsed from S11, the main measurement is started together with the notification of S13. In this way, in S11, the subject is encouraged to breathe at rest, and after the predetermined measurement at the rest is performed, the main measurement is started together with the expiration start notification (S13). Measurement.

  After the notification in S14, after waiting for a predetermined time (for example, 1 second), it is determined whether 30 seconds have passed since the notification in S13 (S15a). When it is determined in S15a that 30 seconds have not elapsed (N), the process waits again for a predetermined time, and performs notification in S14 and determination in S15a. If it is determined in S15a that 30 seconds have elapsed (Y), the voice “I suck a lot of breasts” is output (S16), and then the voice “Suck it” is output (S17). Encourage the subject to breathe to the full lungs.

  After the notification in S17, after waiting for a predetermined time (for example, 1 second), it is determined whether or not 30 seconds have passed since the notification in S16 (S18a). When it is determined in S18a that 30 seconds have not elapsed (N), the process waits again for a predetermined time, and performs the notification in S17 and the determination in S18a. If it is determined in S18a that 30 seconds have elapsed (Y), a voice “I will vomit to the end” is output (S19), and then a voice “VOTE” is output (S20). Encourage the subject to exhale the remaining breath in the lungs.

  After the notification in S20, after waiting for a predetermined time (for example, 1 second), it is determined whether or not 30 seconds have passed since the notification in S19 (S21a). When it is determined in S21a that 30 seconds have not elapsed (N), the process waits again for a predetermined time, and performs the notification in S20 and the determination in S21a. If it is determined in S21a that 30 seconds have elapsed (Y), a voice “End measurement” is output (S22), and the main measurement is terminated.

  After S13, the main measurement is performed and the respiratory volume data is stored in the RAM 14. Then, the minimum value of the respiratory capacity in the period of 30 seconds from S13 is measured as the first maximum expiratory position (point C in FIG. 3), and the maximum value of the respiratory capacity in the period of 30 seconds from S16 is measured as the maximum inspiratory position. (Point D in FIG. 3), the minimum value of the respiratory capacity in the period after S19 is measured as the last maximum expiratory position (point E in FIG. 3). Then, the difference between the first maximum expiratory position and the maximum inspiratory position is measured as the inspiratory vital capacity, and the difference between the maximum inspiratory position and the last maximum expiratory position is measured as the expiratory vital capacity.

The above-described measurement is performed three times in total, and the maximum value among all the measured inspiratory vital capacity and expiratory vital capacity is set as the vital capacity.
Thus, by urging the subject to exhale or inhale and make an effort to perform the maximum exhalation and the maximum inspiration, highly reliable vital capacity measurement can be performed. In addition, by performing the first notification (S14), the second notification (S17), and the third notification (S20) for a predetermined time (30 seconds in this example), each subject under the same conditions. Can perform exhalation and inhalation.

  However, the notification process based on the time determination shown in FIG. 4A has the following problems. First, in order to switch the notification when a certain period of time elapses uniformly, the subject has the remaining capacity to exhale, and even if the maximum expiratory position has not been reached, inhalation is performed at S16 and S17 after a certain period of time has elapsed. There is a problem that the maximum exhalation is not performed. In addition, even though the subject has the remaining capacity to inhale and has not reached the maximum inspiratory position, exhalation is prompted in S19 and S20 after a certain period of time, and the maximum inspiration is actually performed. There is no problem. The maximum expiratory position and the maximum inspiratory position obtained at this time are values lower than the original values that the subject exerted to the maximum, and as a result, the vital capacity becomes an unreliable value. This problem is solved by the notification process based on the flow rate determination shown in FIG.

  In the notification process based on the flow rate determination in FIG. 4B, S15b, S18b, and S21b are performed instead of S15a, S18a, and S21a in the notification process based on the time determination. In each determination, it is determined whether or not the respiratory flow is equal to or less than a threshold value. When a person performs maximum exhalation or maximum inspiration with maximum effort, there is a characteristic that the respiratory flow becomes almost zero at the maximum exhalation point or the maximum inspiration point. That is, when the subject performs the maximum exhalation, the flow rate of the exhaled breath gradually decreases and becomes almost zero at the maximum exhalation level, and when the subject performs the maximum inspiration, the flow rate of the inhaling breath gradually decreases. It becomes almost zero at the maximum intake position. Therefore, when the absolute value of the respiratory flow is equal to or less than a threshold value set near zero, it can be recognized that exhalation or inspiration has been performed with maximum effort. This notification process uses the characteristics.

  In this notification process, after the notification in S14, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or less than a preset threshold (for example, 1 ml / s) (S15b). If it is determined in S15b that it is not less than or equal to the threshold value (N), it waits again for a predetermined time, and performs notification in S14 and determination in S15b. If it is determined in S15b that the value is below the threshold (Y: first time), the voice “suck my whole chest” is output (S16), and then the voice “suck me” is output. (S17), urge the subject to breathe to the full lung.

  After the notification in S17, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or lower than a preset threshold value (S18b). If it is determined in S18b that it is not less than or equal to the threshold value (N), it waits for a predetermined time again, and performs the notification in S17 and the determination in S18b. If it is determined in S18b that it is equal to or less than the threshold value (Y: second time point), a voice saying "I will vomit to the end" is output (S19), and then a voice "vomit" is output. (S20), urge the subject to exhale the breath remaining in the lungs.

  After the notification in S20, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or lower than a preset threshold value (S21b). If it is determined in S21b that it is not less than or equal to the threshold value (N), it waits again for a predetermined time, and performs the notification in S20 and the determination in S21b. If it is determined in S21b that the value is equal to or less than the threshold value (Y: third time point), a sound “the measurement is finished” is output (S22), and the main measurement is finished.

  After S13, the main measurement is performed and the respiratory volume data is stored in the RAM 14. The minimum value of the respiratory capacity between the first time point determined to be below the threshold value first and the second time point determined to be equal to or less than the threshold value is the first maximum expiratory position (point C in FIG. 3). The maximum value of the respiratory capacity between the second time point and the third time point determined to be equal to or lower than the threshold value is measured as the maximum inspiratory position (point D in FIG. 3). The minimum value of the respiratory volume after the time point is measured as the last maximum expiratory position (point E in FIG. 3). Then, the difference between the first maximum expiratory position and the maximum inspiratory position is measured as the inspiratory vital capacity, and the difference between the maximum inspiratory position and the last maximum expiratory position is measured as the expiratory vital capacity. As a result, the inspiratory vital capacity and the expiratory vital capacity can be accurately measured.

  In this manner, after prompting the start of exhalation in S13, the subject can be exhaled with maximum effort by encouraging the continuation of exhalation until the respiratory flow rate falls below the threshold value. In addition, by urging the start of inspiration in S16 and then urging the inspiration to continue until the respiratory flow rate falls below a threshold value, the subject can be inhaled with maximum effort. Furthermore, by urging the start of exhalation in S19 and then encouraging continuation of exhalation until the respiratory flow rate falls below the threshold value, the subject can be exhaled with maximum effort. That is, the maximum expiratory position and the maximum inspiratory position are the original values obtained by the subject to the maximum degree, and as a result, a highly reliable vital capacity can be obtained.

  FIG. 5 shows a second example of the time transition of the respiratory capacity when the vital capacity measurement is performed, and after the completion of the 30-second rest ventilation measurement, as in the first example shown in FIG. 3 and FIG. Measurement is performed. Here, unlike the first example, in this second example, the maximum inspiratory position is first measured in this measurement, then the maximum expiratory position is measured, and then the maximum inspiratory position is measured. Then, the difference between the first maximum inspiratory position and the maximum expiratory position is measured as the expiratory vital capacity, and the difference between the maximum expiratory position and the last maximum inspiratory position is measured as the inspiratory vital capacity.

  At the time of this vital capacity measurement, sound is output from the speaker 20 to notify the subject to exhale or inhale. The notification process will be described with reference to FIG. As in the first example, in this notification process, as shown in FIG. 6A, “notification process by time determination” in which each notification is performed according to the elapsed time, and as shown in FIG. 6B. Two processes of “notification process by flow rate determination” for performing each notification according to the respiratory flow rate are included, and which of the notification processes is performed is set in advance by the operation key 4 or the like.

  In the “notification process by time determination” shown in FIG. 6A, processes similar to S10 to S12 in the first example are performed in S30 to S32. If it is determined in S32 that 30 seconds have not elapsed (N), the process waits again for a predetermined time and performs the determination in S32 again. If it is determined in S32 that 30 seconds have passed (Y: point B in FIG. 5), a voice “suck the whole chest” is output (S33), followed by a voice “suck”. Output (S34) and prompt the subject to breathe to the full lung.

  After the notification in S34, after waiting for a predetermined time (for example, 1 second), it is determined whether 30 seconds have passed since the notification in S33 (S35a). When it is determined in S35a that 30 seconds have not elapsed (N), the process waits again for a predetermined time, and performs notification in S34 and determination in S35a. If it is determined in S35a that 30 seconds have elapsed (Y), a voice “Shoot to the end” is output (S36), and then a voice “Shoot” is output (S37). Encourage the subject to exhale the remaining breath in the lungs.

  After the notification in S37, after waiting for a predetermined time (for example, 1 second), it is determined whether or not 30 seconds have passed since the notification in S36 (S38a). When it is determined in S38a that 30 seconds have not elapsed (N), the process waits again for a predetermined time, and performs the notification in S37 and the determination in S38a. If it is determined in S38a that 30 seconds have passed (Y), a voice “suck my whole chest” is output (S39), and then a voice “suck” is output (S40). Encourage the subject to breathe to the full lungs.

  After the notification in S40, after waiting for a predetermined time (for example, 1 second), it is determined whether or not 30 seconds have passed since the notification in S39 (S41a). When it is determined in S41a that 30 seconds have not elapsed (N), the process waits again for a predetermined time, and performs notification in S40 and determination in S41a. If it is determined in S41a that 30 seconds have passed (Y), a voice “End measurement” is output (S42), and the main measurement is terminated.

  After S33, the main measurement is performed and the respiratory volume data is stored in the RAM 14. Then, the maximum value of the respiratory capacity in the period of 30 seconds from S33 is measured as the first maximum inspiratory position (point C in FIG. 5), and the minimum value of the respiratory capacity in the period of 30 seconds from S36 is measured as the maximum expiratory position. (Point D in FIG. 5), the maximum value of the respiratory capacity in the period after S39 is measured as the last maximum inspiratory position (point E in FIG. 5). Then, the difference between the first maximum inspiratory position and the maximum expiratory position is measured as the expiratory vital capacity, and the difference between the maximum expiratory position and the last maximum inspiratory position is measured as the inspiratory vital capacity.

The above-described measurement is performed three times in total, and the maximum value among all the measured inspiratory vital capacity and expiratory vital capacity is set as the vital capacity.
However, the notification process based on the time determination shown in FIG. 6A has the same problem as in the first example. This problem is solved by the notification process based on the flow rate determination shown in FIG. 6B, S35b, S38b, and S41b are performed in place of S35a, S38a, and S41a of the notification process based on time determination. In each determination, it is determined whether or not the respiratory flow is equal to or less than a threshold value.

  In this notification process, after the notification in S34, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or less than a preset threshold value (for example, 1 ml / s) (S35b). If it is determined in S35b that it is not less than or equal to the threshold value (N), it waits again for a predetermined time, and performs notification in S34 and determination in S35b. If it is determined in S35b that it is equal to or less than the threshold value (Y: first time point), the voice “I will vomit to the end” is output (S36), and then the voice “VOTE” is output. (S37), urge the subject to exhale the breath remaining in the lungs.

  After the notification in S37, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or lower than a preset threshold value (S38b). If it is determined in S38b that it is not less than or equal to the threshold value (N), it waits for a predetermined time again, and performs the notification in S37 and the determination in S38b. If it is determined in S38b that it is below the threshold (Y: second time point), the voice “suck my whole chest” is output (S39), and then the voice “suck me” is output. (S40), urge the subject to inhale to full lungs.

  After the notification in S40, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or lower than a preset threshold value (S41b). If it is determined in S21b that it is not less than or equal to the threshold value (N), it waits for a predetermined time again, and performs the notification in S40 and the determination in S41b. If it is determined in S41b that it is equal to or less than the threshold value (Y: third time point), a voice “End measurement” is output (S42), and the main measurement is terminated.

  After S33, the main measurement is performed and the respiratory volume data is stored in the RAM 14. The maximum value of the respiratory capacity between the first time point determined to be below the threshold value first and the second time point determined to be below the threshold value is the first maximum inspiratory position (point C in FIG. 5). And the minimum value of the respiratory volume between the second time point and the third time point determined to be equal to or lower than the threshold value is measured as the maximum expiratory position (point D in FIG. 5). The maximum value of the respiratory capacity after the time is measured as the last maximum inspiratory position (point E in FIG. 5). Then, the difference between the first maximum inspiratory position and the maximum expiratory position is measured as the expiratory vital capacity, and the difference between the maximum expiratory position and the last maximum inspiratory position is measured as the inspiratory vital capacity. As a result, the expiratory vital capacity and the inspiratory vital capacity can be accurately measured.

  As described above, by urging the start of inspiration in S33 and then encouraging continuation of inspiration until the respiratory flow rate becomes equal to or less than the threshold value, the subject can be inhaled with maximum effort. In addition, by prompting the start of exhalation in S36 and urging the continuation of exhalation until the respiratory flow rate falls below a threshold value, the subject can be exhaled with maximum effort. Furthermore, by urging the start of inspiration in S39 and then urging the inspiration to continue until the respiratory flow rate falls below a threshold value, the subject can be inhaled with maximum effort. That is, the maximum expiratory position and the maximum inspiratory position are the original values obtained by the subject to the maximum degree, and as a result, a highly reliable vital capacity can be obtained.

  Next, the forced vital capacity measurement will be described. In the initial state, when the “forced vital capacity measurement” is selected by the operation key 4, the forced vital capacity measurement program is started. As described above, the time series data of the measured respiratory volume is accumulated in the RAM 14 and displayed on the display 7 as a graph with the elapsed time on the horizontal axis and the respiratory capacity on the vertical axis as shown in FIG. The

  FIG. 7 is a first example of the time transition of respiratory capacity when forced vital capacity measurement is performed. Similar to spirometry, this measurement is performed after the rest ventilation measurement. As shown in FIG. 7, in this measurement, the maximum inspiratory position is first measured, and then the maximum expiratory position is measured. Then, the difference between the maximum inspiratory position and the last maximum expiratory position is measured as expiratory vital capacity. Here, unlike the vital capacity measurement, when the subject exhales in the forced vital capacity measurement, it is necessary to exhale at a stroke (hereinafter, referred to as “a single call”). At this time, the amount of breath called for the first second is measured as “one second”. Then, this measurement is performed three times, and the expiratory vital capacity when the one second amount + expired vital capacity is maximized is defined as the forced vital capacity.

  At the time of this forced vital capacity measurement, a sound is output from the speaker 20 to notify the subject to exhale or inhale. The notification process will be described with reference to FIG. In this notification process, as shown in FIG. 8 (a), each notification according to the elapsed time is performed, and as shown in FIG. 8 (b), each notification is performed according to the respiratory flow rate. Two processes of “notification process by flow rate determination” for performing notification are included, and which of the notification processes is performed is set in advance by the operation key 4 or the like.

  In the “notification process by time determination” shown in FIG. 8A, the same process as S10-12 in the vital capacity measurement is performed in S50-S52, and when it is determined that 30 seconds have passed in S52 (Y : B point in FIG. 7), the voice “I'll suck my whole breasts” is output (S53), then the voice “Suck me” is output (S54), and the subject inhales to the full lungs. Encourage

  After the notification in S54, after waiting for a predetermined time (for example, 1 second), it is determined whether 30 seconds have passed since the notification in S53 (S55a). If it is determined in S55a that 30 seconds have not elapsed (N), the system waits again for a predetermined time, and performs notification in S54 and determination in S55a. If it is determined in S55a that 30 seconds have elapsed (Y), a voice “scream at once” is output (S56), the subject is prompted to call at once, and then “suck up”. A sound is output (S57), and the subject is prompted to exhale the breath remaining in the lungs.

  After the notification in S57, after waiting for a predetermined time (for example, 1 second), it is determined whether or not 30 seconds have passed since the notification in S56 (S58a). When it is determined in S58a that 30 seconds have not elapsed (N), the process waits again for a predetermined time, and performs the notification in S57 and the determination in S58a. If it is determined in S58a that 30 seconds have elapsed (Y), a voice “End measurement” is output (S59), and the main measurement is terminated.

  After S53, the main measurement is performed and the respiratory volume data is stored in the RAM 14. Then, the maximum value of the respiratory capacity in the period of 30 seconds from S53 is measured as the maximum inspiratory position (point C in FIG. 7), and the minimum value of the respiratory capacity in the period of 30 seconds from S56 is measured as the maximum expiratory position ( D point in FIG. 7). Then, the difference between the maximum inspiratory position and the maximum expiratory position is measured as the expiratory vital capacity, and the fluctuation amount of the respiratory capacity in one second from the time of the maximum inspiratory position, that is, the amount of breath exhaled in the first one second is the amount of one second. As measured.

The measurement explained above is performed three times in total, and the expiratory vital capacity when the amount of 1 second + the expiratory vital capacity becomes the maximum is defined as the forced vital capacity.
In this way, the subject is encouraged to continue inspiration, a single call, and exhalation, and to make a maximum inspiration, a single call, and a maximum exhalation. Can do. In addition, by performing the first notification (S54) and the second notification (S57) respectively for a predetermined time (30 seconds in this example), each subject can inhale and exhale under the same conditions. Can do.

  However, the notification process based on the time determination shown in FIG. 8A has the problem shown in the vital capacity measurement. This problem is solved by the notification process based on the flow rate determination shown in FIG. In the notification process based on the flow rate determination in FIG. 8B, S55b and S58b are performed instead of S55a and S58a in the notification process based on the time determination. In each determination, it is determined whether or not the respiratory flow is equal to or less than a threshold value.

  In this notification process, after the notification in S54, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or lower than a preset threshold value (for example, 1 ml / s) (S55b). If it is determined in S55b that it is not less than or equal to the threshold value (N), it waits for a predetermined time again, and performs notification in S54 and determination in S55b. If it is determined in S55b that it is equal to or less than the threshold value (Y: first time point), a voice “scream at once” is output (S56), prompting the subject to call at once, Is output (S57), and the subject is prompted to exhale the breath remaining in the lungs.

  After the notification in S57, after waiting for a predetermined time (for example, 1 second), it is determined whether or not the respiratory flow rate is equal to or lower than a preset threshold value (S58b). If it is determined in S58b that it is not less than or equal to the threshold value (N), after waiting for a predetermined time again, the notification in S57 and the determination in S58b are performed. If it is determined in S58b that it is equal to or less than the threshold value (Y: second time point), a voice “End measurement” is output (S59), and the main measurement is terminated.

  After S53, the main measurement is performed and the respiratory volume data is stored in the RAM 14. Then, the maximum value of the respiratory capacity between the first time point determined to be below the threshold value first and the second time point determined to be below the threshold value is measured as the maximum inspiratory position (point C in FIG. 7). Then, the minimum value of the respiratory capacity after the second time point is measured as the maximum expiratory position (point D in FIG. 7). Then, the difference between the maximum inspiratory position and the maximum expiratory position is measured as the expiratory vital capacity. Further, the amount of change in the respiratory capacity in one second from the time of the maximum inspiratory position, that is, the amount of breath exhaled in the first second is measured as a one-second amount. This makes it possible to accurately measure the forced vital capacity and the amount per second.

  In this way, by urging the start of inspiration in S53 and urging the inspiration to continue until the respiratory flow rate becomes equal to or lower than the threshold value, the subject can be inhaled with maximum effort. In addition, by prompting a single call in S56 and urging the continuation of the exhalation until the respiratory flow rate falls below the threshold, the subject can be exhaled with maximum effort. That is, the maximum expiratory position and the maximum inspiratory position are the original values obtained by the subject to the maximum degree, and as a result, highly reliable effort vital capacity can be obtained.

[3. (Modification)
Finally, a modification of the present invention will be described.
In the above embodiment, the integrated respiratory function test apparatus 1 in which operation keys, a display, a speaker, a printer, and the like are incorporated in the main body is illustrated. However, the present invention is not limited thereto, and the respiratory function test apparatus of the present invention is, for example, illustrated in FIG. As shown in FIG. 9A, an input device 4 ′ such as a keyboard and a mouse, a display 7 ′, a speaker 20 ′, and a printer 8 ′ may be externally connected to the main body 15 ′.

  FIG. 9B is a functional block diagram illustrating an example of a respiratory function testing device configured by the external connection. A keyboard connection terminal and a mouse connection terminal are provided on the side surface (not shown) of the respiratory function testing device 1 ', and a keyboard and a mouse are connected to the respiratory function test apparatus 1'. The display 7 'is connected to the RGB terminal on the side of the main body, the speaker 20' is connected to the speaker connection terminal, and the printer 8 'is connected to the communication port (for example, USB terminal) for the printer. In addition, a hard disk 13 'is provided in the main body 15' instead of the EEPROM 13 of the above embodiment. The hard disk 13 'stores programs for measuring vital capacity and forced vital capacity. These programs are loaded into the RAM 14' and executed by the CPU 12 '. Further, instead of the RS232C connector 9 of the above embodiment, a LAN connector 9 ′ is provided on the side of the main body 15 ′, and this LAN connector 9 ′ is connected to a local network and can communicate with other network devices.

  In the above embodiment, an example has been described in which the respiratory flow is measured and the respiratory volume is calculated by integrating the measured respiratory flow. However, the present invention is not limited thereto, and the respiratory volume is measured and measured. The respiratory flow rate may be calculated by differentiating the respiratory volume. Either method results in the measurement of respiratory flow and respiratory volume.

  In the above embodiment, the example in which the maximum value among the inspiratory vital capacity and expiratory vital capacity measured three times is described as the vital capacity, but the number of measurements is not limited to this, and the inspiratory vital capacity or expiratory vital capacity is not limited. Only one of them may be measured, and the maximum value may be used as the vital capacity. In the above-described embodiment, an example has been described in which the expiratory vital capacity when the expiratory vital capacity is 3 times, and the expiratory vital capacity when the expiratory vital capacity is the maximum value, is not limited to this. The number of times of measurement is arbitrary, and the maximum value of expiratory vital capacity may be used as the forced vital capacity without considering the amount of one second.

  The respiratory function test apparatus of the present invention can be applied not only to spirometry and forced spirometry, but also to measuring gas component concentration fluctuations due to respiration. For example, the present invention can be applied to a lung diffusion capacity (DLco) measurement for examining how much oxygen can be taken into a lung by inhaling four kinds of gases. In this test, the subject was subjected to four types of gas consisting of helium (He): 10%, carbon monoxide (CO): 0.3%, oxygen (O2): 20%, and nitrogen (N2): 69.7%. Measure the composition of the exhaled gas, the ratio of carbon monoxide and helium. In this examination, when the subject inhales from the maximum expiratory position, the four types of gas in the inhalation bag are released from the flow sensor 5 and the subject inhales them. Then, it is measured how the concentration of each component of the exhaled gas fluctuates when the four types of gas are inhaled to the maximum inspiratory position and breathing is stopped (10 seconds) and then exhalation is started. Also in this case, in order to perform measurement with high reliability, it is necessary to cause the subject to perform maximum inspiration and maximum expiration, and the effect is achieved by applying the present invention.

  Further, the present invention can be applied to a closing volume measurement for examining a non-uniform distribution (occlusion state) in the lung. In this test, pure oxygen is inhaled by the subject, and the concentration variation of the exhaled breath nitrogen is measured. In this examination, when the subject inhales from the maximum expiratory position, the pure oxygen in the inspiratory bag is released from the flow sensor 5 and the subject inhales this. Then, after inhaling pure oxygen to the maximum inspiratory position, expiration is started, and how the nitrogen concentration in the exhaled gas fluctuates when exhaling to the maximum expiration position is measured. Also in this case, in order to perform measurement with high reliability, it is necessary to cause the subject to perform maximum inspiration and maximum expiration, and the effect is achieved by applying the present invention.

  That is, according to the respiratory function test apparatus of the present invention, not only the vital capacity measurement and the forced vital capacity measurement but also the respiratory function measurement that causes the subject to perform the maximum expiration or the maximum inspiration, the maximum expiration and the maximum inspiration are promoted, A highly functional respiratory function test can be performed.

  In the above-described embodiment, when the maximum expiratory position is detected, the elapsed time from the start of notification for prompting expiration and the maximum expiratory position may be displayed on the display 7. Further, when the maximum intake position is detected, the elapsed time from the start of the notification for prompting intake or the maximum intake position may be displayed on the display 7. Thereby, the detection of the maximum expiratory position and the maximum inspiratory position can be confirmed.

  In the above-described embodiment, when switching from the notification that prompts exhalation to the notification that prompts inspiration, a notification that instructs to stop breathing for a certain time (for example, 10 seconds) may be performed. In addition, when switching from a notification that prompts inspiration to a notification that prompts expiration, a notification that instructs to stop breathing for a certain period of time (for example, 10 seconds) may be performed.

In the above-described embodiment, although the notification to prompt the exhalation or the intake has been described example is an audio output, the present invention is not limited to this, the notification is output comments to display, for example, "please have ejection breath until the end." It may be a process of outputting a comment to the screen. Alternatively, both audio output and screen output may be performed.

  In the above embodiment, an example of performing notification (S13 and S14) for prompting exhalation or notification (S33 and S34, S53 and S54) for prompting inspiration after performing respiration measurement at rest for a predetermined time (30 seconds). However, the present invention is not limited to this, and after performing a respiration measurement at rest for a predetermined time, a notification for prompting expiration or a notification for prompting inspiration may be performed when a predetermined reference is reached. This reference time point exceeds, for example, the maximum expiratory position measured in the breath measurement at rest and exceeds twice the maximum expiratory time, or exceeds the maximum inspiratory position measured in the breath measurement at rest, And it is a point in time that exceeds twice the maximum intake time. According to this, the subject can start exhalation or inspiration in the main measurement at his / her own timing.

  In the above embodiment, an example of performing voice output of “I will exhale until the end” at the start of notification to prompt exhalation, and then performing audio output of “vomit” is not limited to this, You may make it perform the audio | voice output "vomit" at the time of a notification start. That is, the notification process of S13, S19, and S36 may not be performed. In the above-described embodiment, an example is described in which a voice output of “I will fully suck my chest” is performed at the start of a notification that prompts inspiration, and then a voice output of “Suck” is given. Instead, the voice output “suck me” may be performed at the start of notification. That is, the notification process of S16, S33, S39, and S53 may not be performed.

FIG. 1 is a diagram illustrating an example of a respiratory function testing device according to the present invention, in which FIG. 1 (a) is a plan view, FIG. 1 (b) is a left side view, FIG. 1 (c) is a front view, FIG. (D) is a right side view. FIG. 2 is a functional block diagram showing an example of a respiratory function testing device according to the present invention. FIG. 3 is a first example showing the time transition of the respiratory capacity when measuring vital capacity. FIG. 4A is an example of a notification process based on time determination, and FIG. 4B is a flowchart illustrating an example of a notification process based on flow rate determination. FIG. 5 is a second example showing the time transition of the respiratory capacity when measuring vital capacity. 6A is an example of a notification process based on time determination, and FIG. 6B is a flowchart illustrating an example of a notification process based on flow rate determination. FIG. 7 is an example showing the time transition of the respiratory capacity at the time of forced vital capacity measurement. FIG. 8A is an example of a notification process based on time determination, and FIG. 8B is a flowchart illustrating an example of a notification process based on flow rate determination. FIG. 9A is a diagram illustrating an example of a respiratory function testing device configured by external connection with peripheral devices, and FIG. 9B is a functional block diagram.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Respiratory function inspection apparatus 5 ... Flow sensor 7 ... Display 8 ... Printer 10 ... Pressure sensor 11 ... A / D converter 12 ... CPU
13… EEPROM

Claims (8)

A respiratory function testing device that measures expiratory vital capacity and / or inspiratory vital capacity based on measurement of respiratory capacity,
Measure the respiratory flow, which is the flow of exhaled air or inspired,
Performing a first notification for prompting exhalation until a first time point when the respiratory flow rate is equal to or lower than a predetermined threshold;
Next, a second notification that prompts inspiration is performed from the first time point to a second time point when the respiratory flow rate is below a predetermined threshold value,
Next, the third function for inducing breathing is performed from the second time point to the third time point when the respiratory flow rate is equal to or lower than a predetermined threshold value. A respiratory function testing device that measures expiratory vital capacity and / or inspiratory vital capacity based on measurement of respiratory capacity,
Measure the respiratory flow, which is the flow of exhaled air or inspired,
Performing a first notification that prompts inspiration until a first time point when the respiratory flow rate is equal to or lower than a predetermined threshold;
Next, a second notification for prompting exhalation is performed from the first time point to a second time point when the respiratory flow rate is equal to or lower than a predetermined threshold value,
Next, a third function for inspiring inspiration is performed from the second time point to the third time point when the respiratory flow rate is equal to or lower than a predetermined threshold value. The respiratory function testing device according to claim 1,
Measuring the difference between the maximum expiratory position between the first time point and the second time point and the maximum inspiratory position between the second time point and the third time point as the inspiratory vital capacity,
A respiratory function test apparatus, wherein a difference between the maximum inspiratory position and a maximum expiratory position after the third time point is measured as the expiratory vital capacity. A respiratory function testing device according to claim 2,
A difference between a maximum inspiratory position between the first time point and the second time point and a maximum expiratory position between the second time point and the third time point is measured as the expiratory vital capacity,
A respiratory function test apparatus that measures a difference between the maximum expiratory position and a maximum inspiratory position after the third time point as the inspiratory vital capacity. A respiratory function testing device that measures forced vital capacity based on measurement of respiratory capacity,
Measure the respiratory flow, which is the flow of exhaled air or inspired,
A first notification that prompts the intake, have rows until the first time the said respiratory flow is equal to or less than a predetermined threshold value,
Next, a call notification is made to prompt a call,
Next , a respiratory function testing device that performs second notification for prompting continuation of exhalation from the notification of the call until a second time point at which the respiratory flow rate is equal to or lower than a predetermined threshold value. The respiratory function testing device according to claim 5 ,
The respiratory function test apparatus characterized in that a difference between a maximum inspiratory position between the first time point and the second time point and a maximum expiratory position after the second time point is measured as the forced vital capacity. The respiratory function testing device according to claim 5 or 6 ,
A respiratory function test apparatus that measures the amount of change in the respiratory capacity in one second from the time when the maximum inspiratory position between the first time and the second time is reached, as a one-second amount. The respiratory function testing device according to claim 1, selected from claims 1 to 7 ,
Prior to the first notification, the measurement of the respiratory volume is started, and a notification for prompting breathing at rest is performed.
A respiratory function testing device that performs the first notification after a predetermined time has elapsed from the start of the measurement.

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