Pulmonary function measuring device

Abstract

To inhibit a mouthpiece from coming off in a lung function measuring device.SOLUTION: A lung function measuring device 1 includes: a housing 10; a first container 21 having a first space R1 surrounded by a cylinder 21a and a piston 21b, which is stored in the housing 10; a first pipe PL1 having a first end part T11 that is opened in the first space R1 and a second end part T12 to which a first mouthpiece MP1 is removably attached outside the housing 10; a second pipe PL2 having a first end part T21 and a second end part T22 opened in the first space R1 respectively, and a third end part T23 to which a second mouthpiece MP2 is removably attached outside the housing 10; a holding part 50 for holding the second end part T12 of the first pipe PL1 and the third end part T23 of the second pipe PL2 outside the housing 10; and a lock mechanism part 90 for preventing the first mouthpiece MP1 from coming off the second end part T12 of the first pipe PL1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a pulmonary function measuring device. [Background technology]

[0002] Patent Document 1 discloses, as an example of a pulmonary function measuring device, a pulmonary respiratory function testing device including a rolling seal spirometer and a first respiratory tube. A mouthpiece is detachably attached to the first respiratory tube, and the subject's exhaled breath flows into the cylinder chamber of the rolling seal spirometer via the mouthpiece and the first respiratory tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-086704 Summary of the Invention [Problem to be solved by the invention]

[0004] In some pulmonary function tests, the subject blows forcefully into a mouthpiece. In the pulmonary function measuring device of Patent Document 1, when the subject exhales forcefully, a load is applied to the mouthpiece, which may cause the mouthpiece to come off the first breathing tube.

[0005] The present disclosure aims to prevent a mouthpiece from coming off in a pulmonary function measuring device. [Means for solving the problem]

[0006] A pulmonary function measuring device according to one embodiment of the present disclosure includes: a first container housed in the housing, the first container having a housing, a cylinder, a piston movably disposed relative to the cylinder, and a flexible diaphragm disposed between the cylinder and the piston; a first pipe having a first end opening into a first space surrounded by the cylinder and the piston and a second end outside the housing to which a first mouthpiece is detachably attached; a second pipe having first and second ends each opening into the first space and a third end outside the housing to which a second mouthpiece is detachably attached; a holding unit disposed in the housing and holding the second end of the first pipe and the third end of the second pipe outside the housing; and a locking mechanism disposed at the second end of the first pipe and preventing the first mouthpiece from being detached from the second end of the first pipe when the first mouthpiece is attached to the second end of the first pipe.

[0007] According to this, the locking mechanism prevents the first mouthpiece from coming off the second end of the first pipe, thereby making it possible to prevent the first mouthpiece from coming off in the pulmonary function measuring device.

[0008] In one embodiment of the pulmonary function measuring device of the present disclosure, the first mouthpiece has a tubular portion and a flange portion disposed on the outer peripheral surface of the tubular portion as an integral part, and the locking mechanism portion has a hole into which the tubular portion fits and a contact surface against which the flange portion abuts when the first mouthpiece is attached to the second end of the first piping, and comprises: a main body portion attached to the second end of the first piping; and a pressing portion that presses the flange portion toward the contact surface when the first mouthpiece is attached to the second end of the first piping.

[0009] According to this, in the locking mechanism, the pressing portion presses the flange portion of the first mouthpiece against the contact surface of the main body, thereby making it possible to further prevent the first mouthpiece from coming off in the pulmonary function measuring device.

[0010] In one embodiment of the pulmonary function measuring device of the present disclosure, the pressing portion has a U-shape, is rotatably attached to the main body portion, and includes a wire portion that can press the flange portion toward the contact surface when the tubular portion is located inside, and a hook portion that is disposed on the main body portion and onto which the wire portion hooks when the wire portion presses the flange portion.

[0011] According to this, the hook portion of the pressing portion of the locking mechanism hooks onto the wire portion while the wire portion presses against the flange portion. Therefore, the pressing portion reliably presses the flange portion of the first mouthpiece against the contact surface of the main body. This more reliably prevents the first mouthpiece from coming off in the pulmonary function measuring device.

[0012] A pulmonary function measuring device according to one aspect of the present disclosure further includes a first connecting tube connecting a second end of the first piping and the first mouthpiece, the first connecting tube being attached to the second end of the first piping and including a cylindrical mounting portion into which the tubular portion fits, and an elastic portion protruding from an inner circumferential surface of the mounting portion and arranged around the entire circumference of the inner circumferential surface of the mounting portion, the elastic portion being in contact with the outer circumferential surface of the tubular portion around the entire circumference when the tubular portion is fitted inside the mounting portion.

[0013] This allows the first connecting pipe to prevent the subject's exhaled breath from leaking between the second end of the first piping and the first mouthpiece, so that the pulmonary function measuring device can properly test pulmonary function even when it is equipped with a locking mechanism.

[0014] A pulmonary function measuring device according to one embodiment of the present disclosure further includes a first bag to which gas inhaled by a subject is supplied, a second bag to which the exhaled breath of the subject who has inhaled the gas is supplied, a second container having a second space to accommodate the first bag and the second bag, and a third pipe having a first end connected to the first bag, a second end connected to the second bag, and a third end to which a third mouthpiece is detachably attached outside the housing, wherein the holding part is arranged on the housing so as to be movable relative to the housing and further holds the third end of the third pipe.

[0015] According to this, the holding unit is movable relative to the housing and holds three mouthpieces: the first mouthpiece, the second mouthpiece, and the third mouthpiece. This allows the height of the mouthpieces to be adjusted based on the subject's height, build, etc. This prevents strain on the mouthpieces when the subject breathes, which would otherwise be caused by the height of the mouthpieces not matching the height and build of the subject. This further prevents the mouthpieces from coming off in the pulmonary function measuring device.

[0016] In one embodiment of the pulmonary function measuring device of the present disclosure, the holding portion holds the second end of the first pipe, the third end of the second pipe, and the third end of the third pipe so that the second end of the first pipe and the third end of the second pipe can be moved relative to the third end of the third pipe.

[0017] This allows the positions of the first and second mouthpieces relative to the third mouthpiece to be adjusted, thereby allowing the positions of the first and second mouthpieces to be adjusted depending on the type of pulmonary function test.

[0018] The pulmonary function measuring device according to one aspect of the present disclosure further includes a flexible second connecting tube, and the third mouthpiece is connected to the third piping via the second connecting tube.

[0019] With this, even when the subject exhales forcefully into the third mouthpiece, which places a load on the third mouthpiece, the second connecting tube deforms and the position of the third mouthpiece changes, thereby preventing the third mouthpiece from coming off in the pulmonary function measuring device.

[0020] A pulmonary function measuring device according to one aspect of the present disclosure includes a housing, a cylinder, a piston movably disposed relative to the cylinder, and a flexible diaphragm disposed between the cylinder and the piston, the pulmonary function measuring device including a first container accommodated in the housing; a first pipe having a first end opening into a first space surrounded by the cylinder and the piston and a second end outside the housing to which a first mouthpiece is detachably attached; a second pipe having first and second ends respectively opening into the first space and a third end outside the housing to which a second mouthpiece is detachably attached; and a second pipe positioned outside the housing. The device comprises a first bag to which gas is supplied to be inhaled by the subject, a second bag to which the exhaled breath of the subject who has inhaled the gas is supplied, a second container having a second space to accommodate the first bag and the second bag, a third pipe having a first end connecting to the first bag, a second end connecting to the second bag, and a third end and disposed in the second container, a holding part disposed in the housing and holding the third end of the second pipe and the second container outside the housing, and a flexible connecting pipe disposed within the second container, and a third mouthpiece is connected to the third end of the third pipe via the connecting pipe.

[0021] With this, even when a subject exhales forcefully into the third mouthpiece, putting a load on the third mouthpiece, the connecting tube deforms and the position of the third mouthpiece changes, thereby preventing the third mouthpiece from coming off in the pulmonary function measuring device. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is an external view of a pulmonary function measuring device according to an embodiment of the present disclosure as viewed from the front side. [Figure 2] FIG. 2 is a diagram showing the configuration of the part of the pulmonary function measuring device where the pulmonary function test is performed. [Figure 3] FIG. 3 is a partial enlarged view of the pulmonary function measuring device when viewed from the rear side. [Figure 4] FIG. 4 is a partially enlarged view of the pulmonary function measuring device showing the holding unit and the second testing unit. [Figure 5] FIG. 5 is a perspective view of the locking mechanism to which the first mouthpiece is attached. [Figure 6] FIG. 6 is a cross-sectional view of the locking mechanism. [Figure 7A] FIG. 7A is a perspective view of the locking mechanism showing a state in which the first mouthpiece is not attached. [Figure 7B] FIG. 7B is a perspective view of the locking mechanism with the first mouthpiece attached and the pressing part in the detachable position. [Figure 7C] FIG. 7C is a perspective view of the locking mechanism, showing the state in which the wire portion is fitted into the groove of the hook portion when the hook portion is in the release position. [Figure 7D] FIG. 7D is a perspective view of the locking mechanism showing the hook portion in the hooking position and the wire portion in the pressing position. [Figure 8] FIG. 8 is a cross-sectional view showing the periphery of the third end of the third pipe in a pulmonary function measuring device according to a modified embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited thereto. The components of each embodiment described below can be combined as appropriate. Also, some components may not be used. The Z direction shown in the drawings corresponds to the up-down direction (height direction) of the pulmonary function measuring device 1.

[0024] Fig. 1 is an external view of a pulmonary function measuring device 1 according to an embodiment of the present disclosure as viewed from the front side. Fig. 2 is a diagram showing the configuration of the part of the pulmonary function measuring device 1 where pulmonary function testing is performed.

[0025] The pulmonary function measuring device 1 is a device for testing the pulmonary function of a subject. The pulmonary function measuring device 1 can perform tests such as the Diffusing Capacity of the Lung Carbon Monoxide (hereinafter referred to as the DLco test) using carbon monoxide, the Functional Residual Capacity (FRC) (hereinafter referred to as the FRC test), and the Vital Capacity (hereinafter referred to as the VC test). The FRC test uses the helium closed circuit method.

[0026] The pulmonary function measuring device 1 includes a housing 10, a first testing unit 20, a measuring unit 30, a support unit 40, a holding unit 50, a second testing unit 60, and a control device 70. The housing 10 houses the first testing unit 20 and the measuring unit 30.

[0027] The first inspection unit 20 is used for FRC inspection, VC inspection, etc. The first inspection unit 20 includes a first container 21 and a displacement sensor 22.

[0028] The first container 21 includes a cylinder 21a, a piston 21b, and a diaphragm 21c.

[0029] The cylinder 21a has a cylindrical shape with an opening M1 at one end. The cylinder 21a integrally includes a bottom wall portion 21a1 and a peripheral side wall 21a2. The piston 21b is disposed movably relative to the cylinder 21a. Specifically, the piston 21b moves along the central axis of the cylinder 21a.

[0030] Piston 21b integrally includes a disk portion 21b1 and a piston shaft member 21b2. Disk portion 21b1 is located inside cylinder 21a. Piston shaft member 21b2 is disposed to extend toward the outside of cylinder 21a along the central axis of cylinder 21a. First container 21 has a first space R1 surrounded by cylinder 21a and disk portion 21b1 of piston 21b.

[0031] A first gas supply unit G1 is connected to the first space R1 via a first connecting pipe SL1. The first gas supply unit G1 is, for example, a cylinder. A first valve V1 is disposed in the first connecting pipe SL1. The first valve V1 is an electromagnetic valve that opens and closes the first connecting pipe SL1. The first gas supply unit G1 supplies helium. When the first valve V1 is open, helium is supplied to the first space R1.

[0032] Diaphragm 21c is disposed between piston 21b and cylinder 21a and is flexible. Diaphragm 21c is annular. The inner peripheral edge of diaphragm 21c is connected to the outer peripheral edge of disc portion 21b1. The outer peripheral edge of diaphragm 21c is connected to the inner peripheral surface of peripheral side wall 21a2. Diaphragm 21c is elastic. Diaphragm 21c prevents gas from leaking out of first space R1.

[0033] The displacement sensor 22 detects the amount of movement of the piston 21b relative to the cylinder 21a. The displacement sensor 22 is a linear potentiometer including a variable resistor. That is, the electrical resistance value of the variable resistor changes according to the amount of movement of the piston 21b. The detection result of the displacement sensor 22 is output to the control device 70. The displacement sensor 22 may also be a linear encoder.

[0034] The first inspection section 20 also includes a first pipe PL1 and a second pipe PL2.

[0035] The first end T11 of the first pipe PL1 opens into the first space R1. The second end T12 of the first pipe PL1 is located outside the housing 10. A first mouthpiece MP1 is detachably attached to the second end T12 of the first pipe PL1 (details will be described later). An intermediate section ML1 (see FIG. 1) located between the first end T11 and the second end T12 of the first pipe PL1 and outside the housing 10 is flexible. In other words, the intermediate section ML1 is flexible and bendable.

[0036] A second valve V2 is disposed in the first pipe PL1. The second valve V2 is disposed, for example, in the bottom wall portion 21a1. The second valve V2 is a solenoid valve that opens and closes the first pipe PL1.

[0037] The first pipe PL1 is used, for example, for a VC test. During the VC test, only the second valve V2 is opened, and the subject's exhaled breath is supplied to the first space R1 via the first mouthpiece MP1 and the first pipe PL1. The subject's exhaled breath moves the piston 21b toward the opening M1 of the cylinder 21a. The control device 70 calculates the exhaled breath volume of the subject based on the detection result of the displacement sensor 22.

[0038] The second pipe PL2 has a first pipe section PL2a, a three-way valve Vt, and a second pipe section PL2b. The first pipe section PL2a has a first end T21 and a second end T22 of the second pipe PL2 that open to the first space R1. The three-way valve Vt is disposed between the first end T21 and the second end T22 of the second pipe PL2. The second pipe section PL2b extends from the three-way valve Vt and has a third end T23 of the second pipe PL2.

[0039] The three-way valve Vt has an open state in which the first pipe section PL2a and the second pipe section PL2b are in communication with each other, and a closed state in which the first pipe section PL2a and the second pipe section PL2b are in communication with each other. In both the open state and the closed state of the three-way valve Vt, the first end T21 and the second end T22 of the second pipe PL2 are in communication with each other.

[0040] The three-way valve Vt and the second pipe section PL2b are located outside the housing 10. A second mouthpiece MP2 is detachably attached to a third end T23 of the second pipe PL2 (details will be described later).

[0041] An intermediate portion ML21 (see FIG. 1) located between the first end T21 of the first pipe portion PL2a and the three-way valve Vt and outside the housing 10 is flexible. Furthermore, an intermediate portion ML22 (see FIG. 1) located between the second end T22 of the first pipe portion PL2a and the three-way valve Vt and outside the housing 10 is flexible. In other words, the intermediate portions ML21 and ML22 are flexible and bendable.

[0042] Additionally, a first fan 23 and a third container 24 are disposed in the first pipe section PL2a between the three-way valve Vt and the second end T22. The first fan 23 and the third container 24 are disposed, for example, on the bottom wall section 21a1. The first fan 23 sends out the gas in the first pipe section PL2a from the first end T21 side toward the second end T22 side of the second pipe PL2. The third container 24 contains an absorbent that absorbs carbon dioxide.

[0043] The second pipe PL2 is used, for example, for an FRC test. During the FRC test, helium is supplied to the first space R1 for the subject to inhale. During the FRC test, with only the three-way valve Vt and a third valve V3 (described later) open and the first fan 23 driven, the subject inhales helium from the first space R1 through the first end T21 of the second pipe PL2 via the first pipe PL2a, the three-way valve Vt, the second pipe PL2b, and the second mouthpiece MP2. Furthermore, the subject's exhaled breath is supplied to the first space R1 from the second end T22 of the second pipe PL2 via the second mouthpiece MP2, the second pipe PL2b, the three-way valve Vt, the first pipe PL2a, and the third container 24. Carbon dioxide contained in the subject's exhaled breath is removed by an absorbent material.

[0044] The piston 21b moves toward the opening M1 of the cylinder 21a due to the subject's exhalation. The amount of exhaled air from the subject is calculated by the control device 70 based on the detection result of the displacement sensor 22. Furthermore, the measurement unit 30 detects a change in the helium concentration of the gas in the first space R1 caused by the subject's breathing.

[0045] The measurement unit 30 measures test items in DLco tests, FRC tests, etc. The measurement unit 30 includes a second connecting pipe SL2, a third valve V3, a third connecting pipe SL3, a fourth valve V4, a second fan 31, a CO sensor 32, and a He sensor 33.

[0046] The second connecting pipe SL2 is arranged with its first end E1 and second end E2 connected to the first space R1. The third valve V3 is arranged in the second connecting pipe SL2 and is a solenoid valve that opens and closes the second connecting pipe SL2. The third connecting pipe SL3 connects a first branch portion B1, which is located in the second connecting pipe SL2 between the third valve V3 and the second end E2, to a second bag 63, which will be described later. The third connecting pipe SL3 has a flexible intermediate portion ML3 (see FIG. 1) located outside the housing 10. That is, the intermediate portion ML3 is flexible and bendable. The fourth valve V4 is arranged in the third connecting pipe SL3 and is a solenoid valve that opens and closes the third connecting pipe SL3.

[0047] The second fan 31, CO sensor 32, and He sensor 33 are disposed in the second connecting pipe SL2 between the first branch B1 and the second end E2. The CO sensor 32 detects the concentration of carbon monoxide in the pulmonary function test. The He sensor 33 detects the concentration of helium in the pulmonary function test. The detection results of the CO sensor 32 and the He sensor 33 are output to the control device 70.

[0048] During the FRC test, only the third valve V3 is opened and the second fan 31 is driven. This causes the gas in the first space R1 to circulate through the second connecting pipe SL2. The He sensor 33 detects the concentration of helium supplied from the first gas supply unit G1 to the first space R1 and the concentration of helium in the gas in the first space R1, including the subject's exhaled breath.

[0049] FIG. 3 is a partial enlarged view of the pulmonary function measuring device 1 when viewed from the rear side.

[0050] The support unit 40 is disposed outside the housing 10. The support unit 40 supports the holding unit 50 so that the holding unit 50 is movable relative to the housing 10. In other words, the holding unit 50 is disposed on the housing 10 via the support unit 40. The support unit 40 is, for example, an electric linear actuator. The support unit 40 has a fixed unit 41 fixed to the housing 10, a columnar moving unit 42 movable relative to the fixed unit 41, and a drive unit (for example, a motor) that moves the moving unit 42 relative to the fixed unit 41.

[0051] The moving unit 42 moves along the Z direction of the pulmonary function measuring device 1. As a result, the holding unit 50 moves along the Z direction relative to the housing 10. Note that the support unit 40 may also be an electric screw jack and a hydraulic cylinder.

[0052] FIG. 4 is a partially enlarged view of the pulmonary function measuring device 1 showing the holding unit 50 and the second testing unit 60. As shown in FIG.

[0053] The holding unit 50 holds the second inspection unit 60, the second end T12 of the first pipe PL1, and the third end T23 of the second pipe PL2 outside the housing 10. As shown in FIGS. 3 and 4 , the holding unit 50 includes a first arm 51 and a second arm 52. The base end of the first arm 51 is attached to the upper end of the moving unit 42. The second inspection unit 60 is attached to the tip end of the first arm 51.

[0054] The second inspection unit 60 is used for DLco inspection. The second inspection unit 60 is located outside the housing 10. As shown in FIG. 2 , the second inspection unit 60 includes a second container 61, a first bag 62, and a second bag 63.

[0055] The second container 61 has a second space R2 that accommodates the first bag 62 and the second bag 63. The first bag 62 and the second bag 63 are expandable and contractible.

[0056] The first bag 62 is supplied with a test gas (corresponding to "gas") to be inhaled by the subject. The test gas used in the DLco test is a four-component gas mixture. The four-component gas mixture includes carbon monoxide (CO), oxygen (O2), helium (He), and nitrogen (N2).

[0057] A second gas supply unit G2 is connected to the first bag 62 via a fourth connecting pipe SL4. The second gas supply unit G2 is, for example, a gas cylinder. A fifth valve V5 is disposed in the fourth connecting pipe SL4. The fifth valve V5 is an electromagnetic valve that opens and closes the fourth connecting pipe SL4. The second gas supply unit G2 supplies the test gas. When the fifth valve V5 is open, the test gas is supplied to the first bag 62.

[0058] The second testing section 60 further includes a third pipe PL3. The third pipe PL3 has a third pipe section PL3a and a fourth pipe section PL3b. The third pipe section PL3a has a first end T31 connected to the first bag 62 and a second end T32 connected to the second bag 63, and connects the first bag 62 and the second bag 63. The third pipe section PL3a has a second branch section B2.

[0059] The fourth pipe portion PL3b extends from the second branch portion B2 and has a third end portion T33 of the third pipe PL3 located outside the second container 61 and the housing 10. The third end portion T33 of the third pipe PL3 is exposed from the second container 61 (see FIG. 4). A third mouthpiece MP3 is detachably attached to the third end portion T33 of the third pipe PL3 (details will be described later).

[0060] Additionally, a first check valve RV1 and a second check valve RV2 are disposed in the third pipe PL3. The first check valve RV1 is disposed in the third pipe PL3 between the first end T31 and the second branch B2. The first check valve RV1 allows gas to flow in the third pipe PL3 from the first bag 62 to the third end T33 and blocks gas from flowing in the reverse direction.

[0061] The second check valve RV2 is disposed in the third pipe PL3 between the second end T32 and the second branch B2. The second check valve RV2 allows gas to flow from the third end T33 of the third pipe PL3 to the second bag 63, but blocks gas from flowing in the opposite direction.

[0062] In the DLco test, the fourth valve V4 and the fifth valve V5 are closed, and the test gas in the first bag 62 is inhaled from the first end T31 of the third pipe PL3 through the third pipe PL3a, the first check valve RV1, the second branch B2, the fourth pipe PL3b, and the third mouthpiece MP3 by the test subject. After inhaling the test gas, the exhaled air of the test subject is supplied to the second bag 63 from the second end T32 of the third pipe PL3 through the third mouthpiece MP3, the fourth pipe PL3b, the second branch B2, the third pipe PL3a, and the second check valve RV2.

[0063] During the DLCO test, only the fourth valve V4 is opened and the second fan 31 is driven. This causes the subject's breath in the second bag 63 to flow through the third connecting tube SL3 and the second connecting tube SL2. The CO sensor 32 detects the concentration of carbon monoxide contained in the subject's breath. The He sensor 33 detects the concentration of helium contained in the subject's breath.

[0064] 3 and 4, the holding unit 50 holds the second inspection unit 60 including the third pipe PL3. That is, the holding unit 50 holds the third end T33 of the third pipe PL3.

[0065] The second arm 52 includes a first link 52a, a second link 52b, and a joint 52c that connects the first link 52a and the second link 52b so that the second arm 52 can tilt relative to each other. The second arm 52 is manually operated. A base end of the second arm 52 (a base end of the first link 52a) is attached to the first arm 51 so that the second arm 52 can tilt relative to the first arm 51. A valve unit 80 is attached to a tip end of the second arm 52 so that the valve unit 80 can tilt relative to the second arm 52.

[0066] The valve unit 80 includes the three-way valve Vt, a case 81 that houses the three-way valve Vt, and the third end T23 of the second pipe PL2. That is, the holding part 50 holds the third end T23 of the second pipe PL2.

[0067] Furthermore, a locking mechanism 90 disposed at the second end T12 of the first pipe PL1 is attached to the tip of the second arm 52. The locking mechanism 90 is connected to the valve unit 80 via a connecting member 82.

[0068] The locking mechanism 90 prevents the first mouthpiece MP1 from coming off the second end T12 of the first pipe PL1 when the first mouthpiece MP1 is attached to the second end T12 of the first pipe PL1.

[0069] FIG. 5 is a perspective view of the locking mechanism 90 to which the first mouthpiece MP1 is attached. FIG. 6 is a cross-sectional view of the locking mechanism 90. FIG. 6 shows the state in which the first mouthpiece MP1 is attached to the second end T12 of the first pipe PL1. The first mouthpiece MP1, the second mouthpiece MP2, and the third mouthpiece MP3 have the same shape. Hereinafter, when the first mouthpiece MP1, the second mouthpiece MP2, and the third mouthpiece MP3 are described without distinction, they will be simply referred to as "mouthpiece MP."

[0070] The mouthpiece MP has a cylindrical portion MPa and a flange portion MPb that are integral with each other. The cylindrical portion MPa has a cylindrical shape with both ends open. The flange portion MPb is located between both ends of the cylindrical portion MPa in the axial direction of the cylindrical portion MPa.

[0071] The locking mechanism 90 includes a main body 91, a first connecting member 92 (corresponding to a “first connecting pipe”), and a pressing portion 93.

[0072] The main body 91 is shaped like a hollow box. The main body 91 is attached to the second end T12 of the first pipe PL1. The second end T12 of the first pipe PL1 is cylindrical. An opening M2 of the second end T12 of the first pipe PL1 is located inside the main body 91. The main body 91 has a hole 91a and a contact surface 91b.

[0073] The cylindrical portion MPa fits into the hole 91a when the first mouthpiece MP1 is attached to the second end T12 of the first pipe PL1. The flange portion MPb abuts against the contact surface 91b when the first mouthpiece MP1 is attached to the second end T12 of the first pipe PL1.

[0074] The first connecting member 92 is cylindrical and connects (couples) the second end T12 of the first piping PL1 and the first mouthpiece MP1. In other words, the second end T12 of the first piping PL1 and the first mouthpiece MP1 are connected via the first connecting member 92. The first connecting member 92 is located inside the main body 91. The first connecting member 92 is attached to the second end T12 of the first piping PL1. The first connecting member 92 has an attachment portion 92a and an elastic portion 92b.

[0075] The mounting portion 92a is cylindrical and is attached to the second end T12 of the first pipe PL1. The cylindrical portion MPa fits inside the mounting portion 92a. The elastic portion 92b protrudes from the inner circumferential surface of the mounting portion 92a around the entire circumference of the inner circumferential surface of the mounting portion 92a and has elasticity. Furthermore, when the cylindrical portion MPa is fitted inside the mounting portion 92a, the elastic portion 92b comes into contact with the outer circumferential surface of the cylindrical portion MPa around the entire circumference. Specifically, the protruding end of the elastic portion 92b comes into contact with the outer circumferential surface of the cylindrical portion MPa. In other words, the elastic portion 92b and the outer circumferential surface of the cylindrical portion MPa are in line contact.

[0076] This prevents the exhaled breath of the subject from leaking from between the first mouthpiece MP1 and the second end T12 of the first pipe PL1 when the exhaled breath of the subject is blown into the first mouthpiece MP1.

[0077] The pressing portion 93 presses the flange portion MPb toward the contact surface 91b in a state in which the first mouthpiece MP1 is attached to the second end T12 of the first pipe PL1. The pressing portion 93 includes a wire portion 93a and a hook portion 93b.

[0078] The wire portion 93a has a U-shape. The wire portion 93a is attached to the main body portion 91 so as to be rotatable relative to the main body portion 91. Specifically, both ends of the wire portion 93a are held by the main body portion 91 so that the wire portion 93a is rotatable relative to the main body portion 91. The wire portion 93a rotates around a rotation axis Ax2 that is perpendicular to the central axis Ax1 of the second end portion T12 of the first piping PL1. The wire portion 93a is rotated manually.

[0079] The wire portion 93a rotates between an attachment / detachment position Pt1 (see Figure 7A described later) where the first mouthpiece MP1 can be attached and detached to the second end T12 of the first piping PL1, and a pressing position Pt2 where the first mouthpiece MP1 is pressed while attached to the second end T12 of the first piping PL1.

[0080] At the pressing position Pt2, the wire portion 93a presses the flange portion MPb toward the contact surface 91b with the cylindrical portion MPa located inside. An elastic cushion portion 94 is attached to the wire portion 93a. The wire portion 93a presses the flange portion MPb via the cushion portion 94.

[0081] The hook portion 93b is disposed on the main body portion 91, and hooks onto the wire portion 93a when the wire portion 93a presses against the flange portion MPb (when the wire portion 93a is at the pressing position Pt2). The hook portion 93b is attached to the main body portion 91 so as to be rotatable relative to the main body portion 91. The hook portion 93b rotates around a rotation axis Ax3 that is parallel to the rotation axis Ax2.

[0082] The hook portion 93b has a groove 93b1 into which the wire portion 93a fits. The hook portion 93b rotates between a hook position Pt3 where the wire portion 93a is hooked and a release position Pt4 (see FIG. 7A, described later) where the wire portion 93a is allowed to rotate. The hook position Pt3 and the release position Pt4 of the hook portion 93b can be manually switched.

[0083] Next, the operation of the locking mechanism 90 will be described.

[0084] Fig. 7A is a perspective view of the locking mechanism 90 showing a state in which the first mouthpiece MP1 is not attached. In Fig. 7A, the wire portion 93a is in the attachment / detachment position Pt1, and the hook portion 93b is in the release position Pt4.

[0085] 7B is a perspective view of the locking mechanism 90 showing the state in which the first mouthpiece MP1 is attached and the pressing portion 93 is in the attachment / detachment position Pt1. The hook portion 93b is in the release position Pt4. The first mouthpiece MP1 is inserted into the hole 91a and is attached to the second end T12 of the first pipe PL1 via the first connecting member 92. The flange portion MPb contacts the contact surface 91b (see FIG. 6).

[0086] 7C is a perspective view of the locking mechanism 90 showing the wire portion 93a fitted into the groove 93b1 of the hook portion 93b when the hook portion 93b is in the release position Pt4. The wire portion 93a is rotated from the attachment / detachment position Pt1, and the wire portion 93a fits into the groove 93b1 of the hook portion 93b, which is in the release position Pt4. At this time, the wire portion 93a is positioned between the attachment / detachment position Pt1 and the pressing position Pt2, the tubular portion MPa is positioned inside the wire portion 93a, and the cushion portion 94 is not in contact with the flange portion MPb. In other words, at this time, the wire portion 93a does not press the flange portion MPb.

[0087] 7D is a perspective view of the locking mechanism 90 showing the hook portion 93b at the hooking position Pt3 and the wire portion 93a at the pressing position Pt2. When the hook portion 93b rotates from the release position Pt4 to the hooking position Pt3 with the wire portion 93a fitted in the groove 93b1, the wire portion 93a is positioned at the pressing position Pt2 and presses the flange portion MPb. This prevents the first mouthpiece MP1 from coming off the second end T12 of the first pipe PL1.

[0088] 3, the locking mechanism 90 is held at the tip of the second arm 52 via the connecting member 82 and the valve unit 80. The locking mechanism 90 is also attached to the second end T12 of the first pipe PL1. In other words, the holding part 50 holds the second end T12 of the first pipe PL1.

[0089] Furthermore, the valve unit 80 holds the third end T23 of the second pipe PL2. Therefore, when the second arm 52 operates, the second end T12 of the first pipe PL1 and the third end T23 of the second pipe PL2 are displaced relative to the first arm 51.

[0090] As described above, the second inspection unit 60 having the third end T33 of the third pipe PL3 is attached to the first arm 51. That is, the holding unit 50 holds the second end T12 of the first pipe PL1, the third end T23 of the second pipe PL2, and the third end T33 of the third pipe PL3 so that the second end T12 of the first pipe PL1 and the third end T23 of the second pipe PL2 can be moved relative to the third end T33 of the third pipe PL3.

[0091] The third end T23 of the second pipe PL2 and the third end T33 of the third pipe PL3 are cylindrical. The cylindrical portion MPa of the second mouthpiece MP2 is fitted into the third end T23 of the second pipe PL2, thereby attaching the second mouthpiece MP2. The cylindrical portion MPa of the third mouthpiece MP3 is fitted into the third end T33 of the third pipe PL3, thereby attaching the third mouthpiece MP3.

[0092] 1 controls the pulmonary function measuring device 1. The control device 70 outputs control signals that control the opening and closing of the first valve V1, the second valve V2, the third valve V3, the fourth valve V4, the fifth valve V5, and the three-way valve Vt. The control device 70 also acquires the detection results of the CO sensor 32 and the He sensor 33. The control device 70 displays the test results on a display unit DSP (e.g., a display).

[0093] The control device 70 is a computer, and includes, for example, a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), an internal storage unit, an input interface, and an output interface. The CPU, ROM, RAM, and internal storage unit are connected via an internal bus. The ROM stores programs such as BIOS. The internal storage unit is, for example, a hard disk drive (HDD) or flash memory, and stores operating system programs and application programs. The CPU uses the RAM as a work area and executes programs stored in the ROM or internal storage unit to realize various functions.

[0094] The subject undergoes a VC test, an FRC test, and a DLco test consecutively, with the first mouthpiece MP1 attached to the second end T12 of the first pipe PL1, the second mouthpiece MP2 attached to the third end T23 of the second pipe PL2, and the third mouthpiece MP3 attached to the third end T33 of the third pipe PL3.

[0095] During testing, the central axes of the cylindrical portions MPa of the three mouthpieces MP are adjusted to be approximately horizontal and parallel to one another by adjusting the positions of the housing 10, the first arm 51, and the second arm 52. Furthermore, the control device 70 drives the support portion 40 to adjust the height of the holding portion 50 based on the height and build of the subject, thereby adjusting the height of the mouthpieces MP.

[0096] The heights of the first mouthpiece MP1 and the second mouthpiece MP2 relative to the third mouthpiece MP3 are predetermined to a height that allows the subject to breathe easily without having to readjust the height of the holder 50. For example, by aligning the heights of the three mouthpieces MP, when performing a DLCO test, an FRC test, and a VC test consecutively, the height of the mouthpiece MP does not need to be adjusted for each test. If the heights of the first mouthpiece MP1 and the second mouthpiece MP2 relative to the third mouthpiece MP3 need to be adjusted again, they can be adjusted using the second arm 52.

[0097] Furthermore, the mouthpiece MP is held by the holder 50 and is not held by the subject's hand during the test. If the mouthpiece MP is held by the subject, there is a possibility that the subject's posture will change significantly when the subject breathes. Furthermore, if the subject's posture changes significantly, there is a possibility that the subject's breathing characteristics (for example, the characteristics of the relationship between the amount of exhaled air and the flow rate (the so-called flow-volume curve)) will change. On the other hand, if the mouthpiece MP is held by the holder 50, changes in the subject's posture are suppressed during the DLCO test, FRC test, and VC test, and changes in the subject's breathing characteristics between multiple tests can be suppressed.

[0098] Furthermore, even subjects with relatively weak gripping strength can be properly tested without having to hold the mouthpiece MP in their hands. Furthermore, because the mouthpiece MP is held in the holder 50, there is no need to place the mouthpiece MP in a different location when the test is not being performed.

[0099] Furthermore, in the forced vital capacity (FVC) test, the subject forcefully exhales into the first mouthpiece MP1. This may cause the first mouthpiece MP1 to become detached from the second end T12 of the first piping PL1. However, as described above, the locking mechanism 90 prevents the first mouthpiece MP1 from becoming detached from the second end T12 of the first piping PL1. In other words, even in the forced vital capacity test, the first mouthpiece MP1 is prevented from becoming detached from the second end T12 of the first piping PL1.

[0100] As described above, according to this embodiment, the pulmonary function measuring device 1 includes a housing 10, a cylinder 21a, a piston 21b arranged movably relative to the cylinder 21a, and a flexible diaphragm 21c arranged between the cylinder 21a and the piston 21b, and includes a first container 21 housed in the housing 10, a first pipe PL1 having a first end T11 opening into a first space R1 surrounded by the cylinder 21a and the piston 21b and a second end T12 outside the housing 10 to which a first mouthpiece MP1 is detachably attached, and The housing 10 includes a second pipe PL2 having a second end T21 and a second end T22, and a third end T23 to which the second mouthpiece MP2 is detachably attached outside the housing 10, a holding part 50 arranged on the housing 10 and holding the second end T12 of the first pipe PL1 and the third end T23 of the second pipe PL2 outside the housing 10, and a locking mechanism part 90 arranged on the second end T12 of the first pipe PL1 and preventing the first mouthpiece MP1 from coming off the second end T12 of the first pipe PL1 when the first mouthpiece MP1 is attached to the second end T12 of the first pipe PL1.

[0101] As a result, the locking mechanism 90 prevents the first mouthpiece MP1 from coming off the second end T12 of the first pipe PL1, thereby preventing the first mouthpiece MP1 from coming off in the pulmonary function measuring device 1.

[0102] The first mouthpiece MP1 also has, integrally, a cylindrical portion MPa and a flange portion MPb arranged on the outer peripheral surface of the cylindrical portion MPa. The locking mechanism 90 includes a main body 91 attached to the second end T12 of the first piping PL1, the main body having a hole 91a into which the cylindrical portion MPa fits and a contact surface 91b against which the flange portion MPb abuts when the first mouthpiece MP1 is attached to the second end T12 of the first piping PL1, and a pressing portion 93 that presses the flange portion MPb toward the contact surface 91b when the first mouthpiece MP1 is attached to the second end T12 of the first piping PL1.

[0103] According to this, in the locking mechanism 90, the pressing portion 93 presses the flange portion MPb of the first mouthpiece MP1 against the contact surface 91b of the main body 91. This makes it possible to further prevent the first mouthpiece MP1 from becoming detached from the pulmonary function measuring device 1.

[0104] The pressing portion 93 has a U-shape, is attached to the main body 91 so as to be rotatable relative to the main body 91, and includes a wire portion 93a that can press the flange portion MPb toward the contact surface 91b when the cylindrical portion MPa is located inside, and a hook portion 93b that is arranged on the main body 91 and onto which the wire portion 93a hooks when the wire portion 93a presses the flange portion MPb.

[0105] According to this, in the pressing portion 93 of the locking mechanism 90, the hook portion 93b hooks the wire portion 93a while the wire portion 93a is pressing against the flange portion MPb. Therefore, the pressing portion 93 reliably presses the flange portion MPb of the first mouthpiece MP1 against the contact surface 91b of the main body 91. Therefore, it is possible to more reliably prevent the first mouthpiece MP1 from coming off in the pulmonary function measuring device 1.

[0106] The pulmonary function measuring device 1 further includes a first connecting member 92 that connects the second end T12 of the first piping PL1 and the first mouthpiece MP1. The first connecting member 92 is attached to the second end T12 of the first piping PL1 and includes a cylindrical mounting portion 92a into which the cylindrical portion MPa fits, and an elastic portion 92b that protrudes from the inner circumferential surface of the mounting portion 92a and is disposed around the entire circumference of the inner circumferential surface of the mounting portion 92a. When the cylindrical portion MPa is fitted inside the mounting portion 92a, the elastic portion 92b comes into contact with the outer circumferential surface of the cylindrical portion MPa around the entire circumference.

[0107] This allows the first connecting member 92 to prevent the subject's exhaled breath from leaking between the second end T12 of the first pipe PL1 and the first mouthpiece MP1. Therefore, the pulmonary function measuring device 1 can appropriately test pulmonary function even when the locking mechanism 90 is provided.

[0108] The pulmonary function measuring device 1 also includes a first bag 62 to which gas inhaled by the subject is supplied, a second bag 63 to which the exhaled breath of the subject who has inhaled the gas is supplied, a second container 61 having a second space R2 to accommodate the first bag 62 and the second bag 63, and a third pipe PL3 having a first end T31 connected to the first bag 62, a second end T32 connected to the second bag 63, and a third end T33 to which a third mouthpiece MP3 is detachably attached outside the housing 10. The holding unit 50 is disposed in the housing 10 so as to be movable relative to the housing 10, and further holds the third end T33 of the third pipe PL3.

[0109] According to this, the holder 50 is movable relative to the housing 10 and holds three mouthpieces MP: a first mouthpiece MP1, a second mouthpiece MP2, and a third mouthpiece MP3. This allows the height of the mouthpieces MP to be adjusted based on the subject's height, build, and the like. This prevents the mouthpieces MP from being subjected to strain when the subject breathes, which would otherwise be caused by the height of the mouthpieces MP not matching the height and build of the subject. This further prevents the mouthpieces MP from becoming detached from the pulmonary function measuring device 1.

[0110] In addition, the holding portion 50 holds the second end T12 of the first pipe PL1, the third end T23 of the second pipe PL2, and the third end T33 of the third pipe PL3 so that the second end T12 of the first pipe PL1 and the third end T23 of the second pipe PL2 can be moved relative to the third end T33 of the third pipe PL3.

[0111] This allows the positions of the first mouthpiece MP1 and the second mouthpiece MP2 relative to the third mouthpiece MP3 to be adjusted depending on the type of lung function test.

[0112] Next, a pulmonary function measuring device 1 according to a modified example of the embodiment of the present disclosure will be described.

[0113] For example, the pressing portion 93 may be annular, through which the cylindrical portion MPa passes and which can press the flange portion MPb. In this case, the locking mechanism 90 may not include the hook portion 93b, and the pressing portion 93 may be detachably attached to the main body 91. In this case, the pressing portion 93 has, for example, an elastically deformable hook that can be hooked onto the main body 91.

[0114] In addition, the pulmonary function measuring device 1 may not be provided with the first connecting member 92, and the first mouthpiece MP1 may be attached to the second end T12 of the first piping PL1 by fitting the tubular portion MPa of the first mouthpiece MP1 into the second end T12 of the first piping PL1.

[0115] Furthermore, the holding unit 50 does not need to include the second arm 52. In this case, the second end T12 of the first pipe PL1, the third end T23 of the second pipe PL2, and the third end T33 of the third pipe PL3 are held by the first arm 51. In this case, the second end T12 of the first pipe PL1 and the third end T23 of the second pipe PL2 are not displaced relative to the third end T33 of the third pipe PL3.

[0116] 8 is a cross-sectional view showing the periphery of the third end T33 of the third pipe PL3 in a pulmonary function measuring device 1 according to a modified example of the embodiment of the present disclosure. In this modified example, the second testing section 60 of the pulmonary function measuring device 1 further includes a second connecting member 164 (corresponding to the "connecting pipe" and the "second connecting pipe") and a fourth pipe PL4.

[0117] In this modified example, the third mouthpiece MP3 is connected (coupled) to the third end T33 of the third pipe PL3 via the fourth pipe PL4 and the second connecting member 164. In this modified example, the second connecting member 164 and the third end T33 of the third pipe PL3 are located inside the second container 61.

[0118] The fourth pipe PL4 is cylindrical. A first end T41 of the fourth pipe PL4 is located outside the second container 61. The cylindrical portion MPa of the third mouthpiece MP3 is fitted into the first end T41 of the fourth pipe PL4, thereby connecting (coupling) the third mouthpiece MP3.

[0119] The second connecting member 164 is a flexible cylindrical member. The second connecting member 164 integrally includes a first end 164a into which the third end T33 of the third pipe PL3 is fitted, a second end 164b into which the second end T42 of the fourth pipe PL4 is fitted, and an intermediate portion 164c located between the first end 164a and the second end 164b and having a diameter larger than the diameters of the first end 164a and the second end 164b.

[0120] The deformation of the second connecting member 164 causes the fourth pipe PL4 to tilt with respect to the third end T33 of the third pipe PL3. That is, the subject can breathe through the third mouthpiece MP3 in a state where the third mouthpiece MP3 is tilted with respect to the fourth pipe portion PL3b.

[0121] According to this modification, pulmonary function measuring apparatus 1 further includes a flexible second connecting member 164. Third mouthpiece MP3 is connected via second connecting member 164 to third pipe PL3.

[0122] With this, even when the subject exhales forcefully into the third mouthpiece MP3, putting a load on the third mouthpiece MP3, the second connecting member 164 deforms and the posture of the third mouthpiece MP3 changes, thereby preventing the third mouthpiece MP3 from coming off in the pulmonary function measuring device 1.

[0123] 8, the holder 50 does not need to hold the second end T12 of the first pipe PL1. In this case, the first pipe PL1, the first mouthpiece MP1, and the like are held by the subject during the VC test. Furthermore, the pulmonary function measuring device 1 does not need to include the locking mechanism 90. In this case, the first mouthpiece MP1 may be directly connected to the second end T12 of the first pipe PL1.

[0124] That is, in the modified example shown in FIG. 8 , when holding unit 50 does not hold second end T12 of first pipe PL1 and pulmonary function measuring device 1 does not include locking mechanism 90, pulmonary function measuring device 1 includes housing 10, cylinder 21a, piston 21b arranged movably relative to cylinder 21a, and flexible diaphragm 21c arranged between cylinder 21a and piston 21b, first container 21 housed in housing 10, first pipe PL1 having first end T11 opening into first space R1 surrounded by cylinder 21a and piston 21b and second end T12 to which first mouthpiece MP1 is detachably attached outside housing 10, first end T21 and second end T22 each opening into first space R1, and housing 1 the second container 61 is located outside the housing 10 and has a first bag 62 to which gas inhaled by the subject is supplied, a second bag 63 to which the exhaled breath of the subject is supplied, and a second space R2 to accommodate the first bag 62 and the second bag 63; the third container 61 is located outside the housing 10 and has a first end T31 connecting to the first bag 62, a second end T32 connecting to the second bag 63, and a third end T33; the third container 61 is located in the housing 10 and has a holder 50 located outside the housing 10 and holds the third end T23 of the second container 61 and the second container 61; and a flexible second connecting member 164 located within the second container 61. The third container 61 is connected to the third end T33 of the third container 61 via the second connecting member 164.

[0125] With this, even when the subject exhales forcefully into the third mouthpiece MP3, putting a load on the third mouthpiece MP3, the second connecting member 164 deforms and the posture of the third mouthpiece MP3 changes, thereby preventing the third mouthpiece MP3 from coming off in the pulmonary function measuring device 1.

[0126] The diameter of the intermediate portion 164c of the second connecting member 164 may be equal to or smaller than the diameter of at least one of the first end portion 164a and the second end portion 164b. [Explanation of symbols]

[0127] 1. Pulmonary function measuring device 10. Cabinet 21 1st container 21a Cylinder 21b piston 21c diaphragm 40 Support part 50 Holding part 61 Second container 62 First Bag 63 Second Bag 80 Valve Unit 90 Locking mechanism 91 Main body Hole 91a 91b Contact surface 92 First connecting member (first connecting pipe) 93 Pressing part 93a Wire section 93b Hook 164 Second connecting member (connecting pipe, second connecting pipe) MP1 1st Mouthpiece MP2 Second Mouthpiece MP3 3rd Mouthpiece MPa cylinder part MPb flange PL1 First piping PL2 Second piping PL3 3rd piping R1 First space R2 2nd space T11 First end of first pipe T12 Second end of first pipe T21 First end of second pipe T22 Second end of second pipe T23 Third end of second pipe T31 1st end of 3rd pipe T32 2nd end of 3rd pipe T33 Third end of third pipe

Claims

1. The housing and a first container housed in the housing, the first container having a cylinder, a piston movably disposed relative to the cylinder, and a flexible diaphragm disposed between the cylinder and the piston; a first pipe having a first end portion that opens into a first space surrounded by the cylinder and the piston and a second end portion to which a first mouthpiece is detachably attached outside the housing; a second pipe having a first end and a second end that each open into the first space, and a third end to which a second mouthpiece is detachably attached outside the housing; a holding portion disposed in the housing and configured to hold a second end portion of the first pipe and a third end portion of the second pipe outside the housing; a locking mechanism that is disposed at a second end of the first piping and prevents the first mouthpiece from being detached from the second end of the first piping when the first mouthpiece is attached to the second end of the first piping, the first mouthpiece integrally includes a cylindrical portion and a flange portion disposed on an outer peripheral surface of the cylindrical portion, The locking mechanism is a main body portion attached to the second end of the first piping, the main body portion having a hole into which the cylindrical portion fits and a contact surface against which the flange portion abuts when the first mouthpiece is attached to the second end of the first piping; a pressing portion that presses the flange portion toward the contact surface in a state in which the first mouthpiece is attached to the second end portion of the first pipe, Pulmonary function measuring device.

2. The pressing portion is a wire portion having a U-shape, attached to the main body portion so as to be rotatable relative to the main body portion, and capable of pressing the flange portion toward the contact surface with the cylindrical portion positioned inside the wire portion; a hook portion that is disposed on the main body portion and on which the wire portion is hooked in a state in which the wire portion presses the flange portion, The pulmonary function measuring device according to claim 1 .

3. a first connecting pipe connecting a second end of the first pipe and the first mouthpiece; The first connecting pipe is a cylindrical mounting portion attached to the second end of the first pipe and into which the cylindrical portion fits; an elastic portion that protrudes from the inner circumferential surface of the mounting portion and is disposed around the entire inner circumferential surface of the mounting portion, and has elasticity; the elastic portion is in contact with the outer circumferential surface of the cylindrical portion over the entire circumference when the cylindrical portion is fitted inside the mounting portion; The pulmonary function measuring device according to claim 1 .

4. a second container having a first bag to which a gas to be inhaled by a subject is supplied, a second bag to which the exhaled breath of the subject who has inhaled the gas is supplied, and a second space to accommodate the first bag and the second bag; a third pipe having a first end connected to the first bag, a second end connected to the second bag, and a third end to which a third mouthpiece is detachably attached outside the housing, the holding portion is disposed on the housing so as to be movably relative to the housing, and further holds a third end portion of the third pipe. The pulmonary function measuring device according to claim 1 .

5. The holding portion is holding the second end of the first pipe, the third end of the second pipe, and the third end of the third pipe so that the second end of the first pipe and the third end of the second pipe can be moved relative to the third end of the third pipe; The pulmonary function measuring device according to claim 4.

6. Further provided is a second flexible connecting pipe; The third mouthpiece is connected to the third piping via the second connecting pipe. The pulmonary function measuring device according to claim 4.

Images