Gas collection bag, gas collection tool and gas suction tool

Abstract

To provide a gas collection bag, a gas collector, and a gas suction tool that can capture and collect any type of emitted gas and can easily capture and collect the emitted gas. [Solution] A gas collection bag having a bag portion and a conduit for introducing gas into the bag portion, one end of which is the gas blowing side into the bag portion and is connected to the inner surface of the bag portion, and the one end of the conduit is joined to a flat tube.

Description

[Technical Field]

[0001] The present invention relates to a gas collection bag, a gas collection tool, and a gas suction tool. [Background technology]

[0002] When measuring gas emitted from a test specimen, methods have been adopted in which the entire gas or specific components of the gas are directly collected, or the gas is adsorbed using an adsorbent, and each component is separated and quantified using an analytical device such as a gas chromatograph or liquid chromatograph.

[0003] The types of gases emitted from a subject include exhaled gases and skin gases for biological gases, and environmental gases such as sick house gases and foul odors for living environment gases. In particular, biological gases are known to have a partial correlation with the health state of a living organism, and from the perspective of early detection of the health state of a living organism and preventing the condition from becoming severe, there is a need to develop a technology that can efficiently capture, accurately separate, and quantify biological gases.

[0004] As devices for collecting biological gases, for example, Patent Documents 1 and 2 disclose devices for collecting exhaled gases, and Patent Documents 3 and 4 disclose devices for collecting skin gases. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-68425 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-14552 [Patent Document 3] Japanese Patent Application Laid-Open No. 2006-214747 [Patent Document 4] Japanese Patent Application Publication No. 2018-141711 Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, advances in analytical technology have made it possible to rapidly measure and analyze gas components. However, the collection of gas components and their subsequent collection into a cylinder, even though non-invasive, can cause discomfort and restrict the subject's movements, take a long time to collect, and can cause problems with the detector or gas collection material due to sweating, etc.

[0007] Furthermore, the prior art techniques described in the above patent documents are limited to collecting, measuring and analyzing only specific gases such as exhaled gases and skin gases, and there has been a demand for the development of a method for measuring all emitted gases in a common manner.

[0008] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a gas collection bag, a gas collection tool, and a gas suction tool that can capture and collect any type of emitted gas and can easily capture and collect the emitted gas. [Means for solving the problem]

[0009] In order to achieve the above object, the gas collection bag of the present invention comprises: A bag portion and a conduit for introducing gas into the bag portion, the conduit having one end on the gas blowing side toward the bag portion connected to an inner circumferential surface of the bag portion; and The one end of the conduit is characterized in that it is joined to a flat tube. [Effects of the Invention]

[0010] According to one embodiment of the present invention, it is possible to provide a gas collection bag, a gas collection tool, and a gas suction tool that can capture and collect any type of emitted gas and can easily capture and collect the emitted gas. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic view of an example of a gas collection bag according to this embodiment. [Figure 2] FIG. 2 is a schematic diagram of an example of a conduit and a flat tube of the gas collection bag according to this embodiment. [Figure 3] FIG. 3 is a schematic diagram for explaining an example of the state of the flat tube when the gas collection bag according to this embodiment is filled with gas. [Figure 4] FIG. 4 is a schematic diagram of an example of a gas collector using the gas collection bag according to this embodiment. [Figure 5] FIG. 5 is a schematic diagram for explaining an example of a gas collecting method using the gas collecting tool according to this embodiment. [Figure 6] FIG. 6 is a schematic diagram of an example of a gas suction container that can be used with the gas collection bag according to this embodiment. [Figure 7] FIG. 7 is a schematic diagram for explaining the state in which the gas collection bag is attached to the gas suction container according to this embodiment. [Figure 8] FIG. 8 is a schematic diagram for explaining another example of a gas collecting method using the gas collecting tool according to this embodiment. [Figure 9] FIG. 9 is a schematic diagram of an example of a syringe set that can be used with the gas collection bag according to this embodiment. [Figure 10] FIG. 10 is a schematic diagram for explaining an example of collecting gas from the gas collection bag according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] A gas collection bag according to one embodiment of the present invention will be described below with reference to the drawings.

[0013] (Overall composition) Fig. 1 shows a schematic diagram of an example of a gas collection bag according to this embodiment. As shown in Fig. 1, the gas collection bag 100 according to this embodiment is configured to include a bag portion 110 in which gas is collected, a conduit 120 for introducing gas into this bag portion 110, and a flat tube 130 connected to one end 122 of this conduit 120. Each of the components will be described in detail.

[0014] The bag portion 110 has a bag-like structure in which gas is trapped inside, and is made of, for example, an odorless, transparent material such as polyester resin that has low gas absorption and permeability. Although not limited thereto, in this embodiment, a rectangular bag portion 110 is used, which is made by weaving a polyester resin film into a bag shape and welding it by heat sealing or the like to give it volume.

[0015] On the outer surface side of the bag part 110, there are provided a label part 114 for writing information about the collected gas (information about the subject, information about the gas, date and time information, etc., and may also include other information), and a belt part 116 for visually or otherwise confirming that the amount of gas collected in the bag part 110 has reached a predetermined amount. In addition, the bag part 110 may be provided with a scale band (not shown) for checking the detailed gas amount.

[0016] The conduit 120 serves to introduce gas into the bag 110 through an opening 112 in the bag 110, with one end 122 located inside the bag 110 and the other end 124 located outside the bag 110.

[0017] The conduit 120 is made of a material such as, but not limited to, an odorless fluororesin.

[0018] FIG. 2 shows a schematic diagram of an example of a conduit and a flat tube of a gas collection bag according to this embodiment. More specifically, (a) on the left side of FIG. 2 is a diagram showing a cross section of one end of a conduit cut obliquely from one radial side to the other, as viewed from above, and (b) on the left side of FIG. 2 is a side view of the cross section of the same cut. (c) on the left side of FIG. 2 is a diagram showing a cross section of one end of a conduit cut obliquely from both radial sides toward the center of the conduit, as viewed from above, and (d) on the left side of FIG. 2 is a side view of the same cut section. (a)', (b)', (c)', and (d)' on the right side of FIG. 2 are schematic diagrams showing the state after joining flat tubes to the conduits shown in the respective left drawings.

[0019] As shown in Figure 2, it is preferable that the end of the conduit 120 that is positioned outside the bag portion 110, i.e., the other end 124, has a cut surface that is perpendicular to the longitudinal direction, and it is preferable that the end that is positioned inside the bag portion 110, i.e., one end 122, has a cut surface that is oblique to the longitudinal direction, as shown in Figures 2(a) to 2(d).

[0020] One end 122 of the conduit 120 that is inserted into the bag portion is configured to have a cut surface that is oblique to the longitudinal direction, so that the flat tube 130 gently opens (expands) when gas is collected, and after gas collection, the flat tube 130 easily closes under atmospheric pressure, preventing backflow of gas, resulting in the advantage that the collected gas does not leak.

[0021] The flat tube 130 is made of a material such as polyester resin. A ready-made flat tube may be used, or a flat tube made by processing a polyester film or sheet or a bag-shaped polyester product may be used. The width of the flat tube 130 is not particularly limited and can be appropriately selected depending on the material used, but is preferably about 40% to about 60% of the circumference of the conduit 120, and more preferably about 50% of the circumference of the conduit 120. The thickness of the flat tube 130 is preferably within a range of 0.01 mm to 0.03 mm, and more preferably 0.02 mm. Furthermore, the length of the flat tube 130 is preferably 1 / 3 to 1 / 2 of the length of the bag portion 110. By setting the length of the flat tube 130 within the above range, the flat tube 130 can easily close at atmospheric pressure after gas collection, thereby efficiently preventing backflow of gas.

[0022] When forming the flat tube 130 on the conduit 120, first, the flat tube 130 is placed over the conduit 120 so as to cover one end 122 of the conduit 120, and the flat tube 130 is joined (welded) to the conduit 120. Then, the flat tube 130 is welded to the inner circumferential surface of the bag portion 110 together with one end 122 of the conduit 120. In this manner, the gas trapping bag 100 can be formed in which the flat tube 130 and the conduit 120 are inserted and connected within the bag portion 110. Furthermore, by forming the flat tube 130 in this manner, the elasticity of the flat tube 130 itself and atmospheric pressure naturally cause the flat tube 130 to fit closely to the cross-sectional shape of one end 122 of the conduit 120, preventing leakage of the trapped gas.

[0023] FIG. 3 is a schematic diagram illustrating an example of the state of the flat tube when the gas trapping bag according to this embodiment is filled with gas. More specifically, FIG. 3(a) is a schematic top view of the gas trapping bag before gas filling, FIG. 3(b) is a schematic side view of the gas trapping bag during gas filling, and FIG. 3(c) is a schematic side view of the gas trapping bag after gas filling. Also, the lower figures in FIG. 3, FIGS. 3(a)', 3(b)', and 3(c)', respectively, are cross-sectional views taken along lines A-A' of FIG. 3(a), B-B' of FIG. 3(b), and C-C' of FIG. 3(c). Note that this embodiment will be described, as an example, in which one end 122 of the conduit 120 is cut obliquely from one radial side to the other, and then the flat tube 130 is joined, as described above with reference to FIGS. 2(a)' and 2(b). When a predetermined gas is blown into the gas collection bag 100 according to this embodiment shown in Fig. 3(a), the flat tube 130 opens due to the gas pressure, filling the bag portion 110 with the gas and inflating the bag portion 110, as shown in Fig. 3(b). After the gas has been filled, the flat tube 130 closes due to the elastic force of the flat tube 130 itself and the gas pressure inside the bag portion 110, as shown in Fig. 3(c), so that the collected gas does not flow back.

[0024] Example 1 An example of collecting exhaled gas from a subject using a gas collecting bag according to this embodiment will be described with reference to the drawings. First, an example of a gas collecting device using the gas collecting bag according to this embodiment will be described with reference to Fig. 4. Fig. 4 shows a schematic diagram of an example of a gas collecting device using the gas collecting bag according to this embodiment.

[0025] As shown in FIG. 4, the gas collector 140 according to this embodiment is configured by connecting an inhalation tube 142 and an odorless pocket mask 144 that can be fitted closely to the subject S to the upstream side of the other end 124 of the conduit 120 of the gas collection bag 100 described above.

[0026] The inhalation tube 142 is not particularly limited as long as it can connect the pocket mask 144 and the conduit 120, and may be formed, for example, from a fluororesin. The length of the inhalation tube 142 can be easily adjusted depending on the condition of the subject. The pocket mask 144 is a mask used, for example, when performing artificial respiration, and has an outlet 145 at the bottom and an inhalation port 146 for inhaling gas at the top. The gas collector 140 and the pocket mask 144 according to this embodiment are connected between the outlet 145 and the conduit 120 via the inhalation tube 142. Generally, a pocket mask is referred to as a pocket mask by those skilled in the art because it is small and storable when not in use and can be carried in a pocket or the like.

[0027] Furthermore, when using the gas collector 140 according to this embodiment, a nonwoven fabric 148 is placed between the subject S and the pocket mask 144 to absorb moisture such as saliva from the exhaled breath and prevent moisture from entering the gas collection bag.

[0028] FIG. 5 is a schematic diagram illustrating an example of a gas collection method using the gas collector according to this embodiment, particularly a method for collecting exhaled gas. When using the gas collector 140 described above, a pocket mask 144 covered with a nonwoven fabric 148 is placed over the mouth of a subject S (e.g., a human), and the subject exhales in time with their breathing (see FIG. 5(a)). Typically, one human breath is approximately 500 mL. The bag 110 according to this embodiment is provided with a belt 116 for visually or otherwise confirming that the amount of collected gas has reached a predetermined amount. This allows the state of gas collection to be visually confirmed, preventing the bag 110 from bursting due to gas collection and enabling the amount of collected gas to be confirmed.

[0029] After gas collection is complete, the suction tube 142 is removed from the other end 124 of the conduit 120, and as shown in FIG. 5(b), the other end 124 of the conduit 120 is sealed with a stopper 150 made of silicone rubber or the like. At this time, information about the collected gas may be written on the label 114. Furthermore, as shown in FIG. 5(c), the conduit 120 is rotated around one end 122 of the conduit 120 toward the upper surface of the bag 110, and the other end 124 of the conduit 120 is fixed by the belt 116. This further seals the inner walls of the flat tubes 130 joined to the conduit 120, thereby more tightly sealing the gas collection bag. This prevents gas from leaking due to atmospheric pressure or the like.

[0030] As described above, the gas collection method according to this embodiment allows for easy collection of gas simply by having the subject S exhale as if breathing, and also makes it possible to visually check the health condition of the subject S according to the amount of breathing. Furthermore, since the nonwoven fabric 148 is placed between the subject S and the pocket mask 144, it is hygienic and moisture such as saliva from the exhaled breath of the subject S does not enter the gas collection bag.

[0031] Example 2 Next, an example of collecting gas emitted from the skin of a subject using the gas collection bag according to this embodiment will be described with reference to the drawings. Fig. 6 is a schematic diagram of an example of a gas suction container applicable to the gas collection bag according to this embodiment, with the left diagram (a) of Fig. 6 showing a schematic top view, the center diagram (b) of Fig. 6 showing a schematic side view, and the right diagram (c) of Fig. 6 showing a schematic front view. Fig. 7 is a schematic diagram illustrating the state in which the gas collection bag is attached to the gas suction container according to this embodiment, and more specifically, shows the state in which the gas collection tool described with reference to Fig. 4 is attached.

[0032] 6 includes an airtight container body 162 for storing the gas collection bag 100, an opening 164 provided in the container body 162 with a vacuum sealing rubber for airtightly passing the conduit 120 therethrough, and an exhaust pipe 166 for depressurizing the container body 162.

[0033] A lid 170 equipped with an atmospheric release valve 168 for releasing air to the atmosphere is attached to the container body 162 via a packing 172 for vacuum sealing, and the container body 162 and the lid 170 are fixed together with a clamp 174.

[0034] 8 is a schematic diagram illustrating another example of a gas collection method using the gas collector of this embodiment, particularly a method for collecting skin gas. When collecting skin gas from a subject S, first, as shown in FIGS. 7 and 8, gas collector 140 of this embodiment is attached to suction container 160, and exhaust pipe 166 is connected to suction pump 178 via exhaust pipe 176.

[0035] By operating the suction pump 178 while the nonwoven fabric 148 is placed on the subject S or the pocket mask is covered with the nonwoven fabric 148 so that the pocket mask 144 does not come into direct contact with the target part of the subject S, the gas emitted from the subject S (in this case, skin gas) can be suction-collected. After collecting the gas, the suction pump 178 is stopped, the air release valve of the suction container 160 is opened, and the suction tube 142 is removed from the conduit 120. Thereafter, as described above with reference to FIG. 5 , the other end 124 of the conduit 120 is sealed with a plug 150 made of silicone rubber or the like, the conduit 120 is rotated around one end 122 of the conduit 120 toward the upper surface of the bag unit 110, and the other end 124 of the conduit 120 is fixed by the belt unit 116. This further seals the flat tube 130 connected to the conduit 120, thereby more firmly sealing the gas collection bag. This prevents gas from leaking due to atmospheric pressure or the like.

[0036] As described above, the gas collection method according to this embodiment can prevent congestion problems in the subject S because it does not require direct contact with the subject S and air is sucked in through the gap. Furthermore, since the nonwoven fabric 148 is placed between the subject S and the pocket mask 144, it is hygienic and does not involve the suction of dust or the like, making it a safe gas suction collection method.

[0037] This embodiment can also be applied to assisting the exhalation of a subject with weak spontaneous breathing. In this case, the pocket mask 144 covered with the nonwoven fabric 148 is placed over the mouth of the subject S, and the suction pump 178 is operated to assist the exhalation of the subject.

[0038] Example 3 A method for collecting the gas trapped in the gas trapping bag according to this embodiment will be described with reference to the drawings.

[0039] FIG. 9 is a schematic diagram showing an example of a syringe set that can be used with the gas collection bag according to this embodiment. When subjecting the gas collected by the gas collection bag according to this embodiment to various analyses such as mass spectrometry, it is necessary to collect the gas from the gas collection bag. When collecting gas from the gas collection bag according to this embodiment, it is preferable to use a syringe set 180 of a type in which gas collected from a syringe needle 182 is drawn into and held in a syringe 186 via a three-way stopcock 184 by pulling a plunger 188, although the present invention is not limited in this respect.

[0040] FIG. 10 is a schematic diagram illustrating an example of gas collection from the gas collection bag according to this embodiment. When gas is collected from the gas collection bag according to this embodiment, as shown in FIG. 10(a), a syringe needle 182 is pierced into, for example, the label portion 114 of the gas collection bag 100, and a plunger 188 of a syringe 186 is pulled (see FIG. 10(b)), allowing a predetermined amount of gas to be aspirated without removing the syringe needle 182. At this time, by controlling the opening and closing of the three-way stopcock 184, the interior of the syringe 186 can also be washed before gas collection. After gas collection, the syringe needle 182 is removed from the syringe set 180, and the syringe 186 is subjected to a predetermined analysis with the sample gas 190 airtightly sealed in place by the three-way stopcock 184 (see FIG. 10(c)). The label portion 114 may be provided with a label protection sheet such as odorless paper for the purpose of preventing the hole at the insertion portion from expanding and being damaged when inserting the injection needle 182 into the gas collection bag 100 and when washing the inside of the syringe 186. In this case, the label protection sheet can prevent ink components and the like from penetrating into the gas collection bag 100, which can occur when writing directly on the gas collection bag 100 with an oil-based pen or the like.

[0041] As described above, the gas collection method using the gas collection bag according to this embodiment is a simple method that can reliably collect gas into the syringe and also enables the interior of the syringe to be washed together.

[0042] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configurations should not be considered limited to these embodiments. For example, in this embodiment, the capture of biological gases, which are technically difficult to capture and collect as the type of gas emitted from a subject, has been described. However, the present invention is not limited in this respect and can also be applied to the capture and collection of environmental gases such as sick house gases and malodors. The scope of the present invention is defined not only by the description of the above embodiments but also by the claims, and further includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0043] 100 Gas collection bag 110 Bag section 112 Opening 114 Label section 116 Belt section 120 Conduit 122 One end 124 other end 130 Flat Tube 140 Gas collector 142 Suction pipe 144 Pocket Mask 145 Outlet 146 Intake port 148 Nonwoven fabric 150 stoppers 160 Suction container 162 Container body 164 Opening 166 Discharge pipe 168 Atmospheric release valve 170 Lid 172 Gasket 174 Clamp 176 Exhaust pipe 178 Suction Pump 180 syringe set 182 Syringe needle 184 Three-way stopcock 186 Syringe 188 Pusher 190 Sample Gas S was found

Claims

1. A bag portion and a conduit for introducing gas into the bag portion, the conduit having one end on the gas blowing side toward the bag portion connected to an inner circumferential surface of the bag portion; a belt portion provided on the outer peripheral surface side of the bag portion; and the one end of the conduit is joined to a flat tube; After collecting the gas, with the plug attached to the other end of the conduit, the conduit can be rotated around one end of the conduit toward the belt portion, and the other end of the conduit can be fixed by the belt portion. Gas collection bag.

2. The flat tube is joined to the inner circumferential surface of the bag portion. The gas collection bag according to claim 1 .

3. One end of the conduit has a cut surface oblique to the longitudinal direction. The gas collection bag according to claim 1 .

4. The bag portion is formed of polyester resin, The conduit is made of a fluororesin, The flat tube is made of polyester resin. The gas collection bag according to claim 1 .

5. A bag portion and a conduit for introducing gas into the bag portion, the conduit having one end on the gas blowing side toward the bag portion connected to an inner circumferential surface of the bag portion; a belt portion provided on the outer peripheral surface side of the bag portion; a suction pipe connected to the other end of the conduit; a pocket mask connected to the inhalation tube; and the one end of the conduit is joined to a flat tube; After collecting the gas, the intake pipe connected to the other end of the conduit is removed, and with a plug attached to the other end of the conduit, the conduit is rotated around one end of the conduit toward the belt portion, and the other end of the conduit is fixed by the belt portion. Gas collector.

6. A bag portion and a conduit for introducing gas into the bag portion, the conduit having one end on the gas blowing side toward the bag portion connected to an inner circumferential surface of the bag portion; a belt portion provided on the outer peripheral surface side of the bag portion; a suction pipe connected to the other end of the conduit; a pocket mask connected to the inhalation tube; a suction container that stores the bag portion in an airtight manner and has at least a discharge pipe and an air release valve; and the one end of the conduit is joined to a flat tube; After collecting the gas, the suction pipe connected to the other end of the conduit is removed, and with a plug attached to the other end of the conduit, the conduit is rotated around one end of the conduit toward the belt portion, and the other end of the conduit is fixed by the belt portion. Gas suction device.

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