A carbon dioxide collection device

Abstract

The carbon dioxide collecting device provided by the application comprises a flexible support structure, a first base element, a first film element, a second base element and a second film element. The flexible support structure has a cavity, first and second through holes are arranged on opposite sides of the cavity, and air inlet and outlet holes are arranged on opposite ends of the cavity. The first base element and the first film element are sequentially arranged at the first through hole. The second base element and the second film element are sequentially arranged at the second through hole. Carbon dioxide absorbents are attached to the two base elements. When the urea breath test is performed, the base element drives the corresponding film element to bulge under the action of exhaled breath, so that the base element and the corresponding film element are tightly attached, so that the film element will not generate static electricity due to friction. Furthermore, the film element will not adsorb radioactive particles in the environment, thereby achieving the effect of avoiding pollution of radioactive particles in the environment and improving the specificity and accuracy of the detection result.

Description

Technical Field

[0001] This invention relates to the field of gas collection technology, and in particular to a carbon dioxide collection device. Background Technology

[0002] Helicobacter pylori is closely related to the occurrence of chronic gastritis, peptic ulcers, and gastric cancer, and has been classified as a Group 1 carcinogen. Approximately 47% of the population in China is infected with Helicobacter pylori. Currently, detection methods for Helicobacter pylori are divided into invasive and non-invasive methods. Non-invasive testing mainly refers to the urea breath test, where the patient orally ingests urea... 14 [C] Carbon-14 is radioactive. If Helicobacter pylori is present in the stomach, the urease it produces can rapidly decompose urea into radioactively labeled carbon dioxide. By measuring whether the concentration of carbon-14 in the patient's breath increases through a breath test, it can be determined whether the patient is infected with Helicobacter pylori.

[0003] Urea breath tests are categorized into card-type, liquid scintillation, and solid scintillation types. The card-type urea breath test uses a gas collection card, which includes a substrate element with absorbent powder for absorbing carbon dioxide. To prevent powder from falling onto the substrate element and causing burns or contaminating the instrument, a thin film element is placed on top. During subsequent beta-ray penetration testing, the film element's thickness should be less than 0.05 mm to avoid interfering with beta-ray penetration; a thinner film thickness promotes beta-ray penetration. However, static electricity is generated when two objects of different materials come into contact and then separate. A thinner film facilitates separation and the accumulation of static electricity. This static electricity causes a large number of radioactive particles in the air to accumulate on the surface of the film element. These particles, similar to carbon-14, interfere with the breath test results, reducing the specificity and accuracy of the results. Summary of the Invention

[0004] Therefore, the main objective of this invention is to provide a carbon dioxide collection device that can avoid airborne radioactive particle contamination.

[0005] To achieve the above objectives, the present invention provides a carbon dioxide collection device, comprising:

[0006] A flexible support structure has an internal cavity. A first through hole and a second through hole communicating with the cavity are respectively opened on opposite sides of the flexible support structure. An air inlet and an air outlet communicating with the cavity are respectively opened at opposite ends of the flexible support structure.

[0007] A first substrate element is connected to the first through hole and covers the first through hole. A carbon dioxide absorbent is attached to the side of the first substrate element opposite to the second through hole.

[0008] A first thin film element is connected to the side of the first substrate element to which the carbon dioxide absorbent is attached, and covers the first substrate element and the first through hole to achieve a seal on the first through hole.

[0009] A second substrate element is connected to the second through hole and covers the second through hole. A carbon dioxide absorbent is also attached to the side of the second substrate element facing away from the first through hole. Both the first and second substrate elements are made of breathable material.

[0010] The second thin film element is connected to the side of the second substrate element to which the carbon dioxide absorbent is attached, and covers the second substrate element and the second through hole to achieve a seal for the second through hole. Both the first thin film element and the second thin film element are made of a material that can be penetrated by beta rays.

[0011] Preferably, the outer periphery of the first thin film element and the outer periphery of the first substrate element are connected to the side of the flexible support structure where the first through hole is formed by an adhesive; the outer periphery of the second thin film element and the outer periphery of the second substrate element are connected to the side of the flexible support structure where the second through hole is formed by an adhesive.

[0012] Preferably, the first substrate element, the first thin film element, the second substrate element, and the second thin film element are all circular sheet structures or near-circular sheet structures.

[0013] Preferably, the diameter of the first substrate element is 4-8 mm, and the diameters of the first thin film element, the second substrate element, and the second thin film element are all the same as the diameter of the first substrate element.

[0014] Preferably, the diameter of the first substrate element is larger than the diameters of the first through hole and the second through hole.

[0015] Preferably, the first substrate element and the second substrate element are nonwoven fabrics, and the thickness of the first substrate element and the second substrate element is 0.6mm-1.2mm.

[0016] Preferably, the carbon dioxide absorbent is an inorganic alkaline substance, which is lithium hydroxide, calcium hydroxide, or sodium hydroxide.

[0017] Preferably, the first film element and the second film element are made of polyester material, and the thickness of the first film element and the second film element is 0.015mm-0.05mm.

[0018] Preferably, the flexible support structure is made of soft plastic material, or the flexible support structure is an aluminum-plastic composite film.

[0019] Preferably, the diameter of the air outlet is 1-2 mm.

[0020] Advantages of the technical solution of this invention: When performing the urea breath test, the patient first takes urea orally. 14 [C] After waiting for an appropriate time, the patient exhales into the air inlet of the carbon dioxide collection device. The patient's exhaled air swirls within the cavity, passing through the first and second substrate elements and reacting with the absorbent adsorbed on the surface of the substrate elements. Thus, the carbon dioxide containing carbon-14 in the exhaled air is absorbed by the carbon dioxide absorbent attached to the first and second substrate elements. Excess exhaled air is expelled through the air outlet. Finally, the carbon dioxide collection device is placed in a breathalyzer for detection. The radioactive carbon dioxide adsorbed on the first and second substrate elements emits beta rays, which penetrate the first and second thin film elements respectively, reaching the detector of the breathalyzer. This allows for the detection of the carbon-14 concentration in the carbon dioxide absorbent, thereby measuring whether the carbon-14 concentration in the patient's exhaled air has increased, and thus determining whether the patient is infected with Helicobacter pylori. As the patient's exhaled air flows within the cavity, it passes through the first and second matrix elements, and also flows between the first matrix element and the first membrane element, as well as between the second matrix element and the second membrane element. This results in the exhaled air flowing simultaneously on opposite sides of the first and second matrix elements, increasing the contact area between the exhaled air and the first and second matrix elements. The first and second matrix elements react fully with the carbon dioxide in the exhaled air, improving the carbon dioxide absorption rate. Due to the flexibility of the flexible support structure, as the patient's exhaled air is transported within the cavity, the flexible support structure bulges outwards. Under the influence of exhalation, the first matrix element bulges towards the first membrane element, thus allowing the first matrix element and the first membrane element to... The two substrate elements are tightly bonded together, with the second substrate element bulging towards the second thin film element. This ensures that the first substrate element and the first thin film element, as well as the second substrate element and the second thin film element, do not separate. Consequently, the first substrate element and the first thin film element, and the second substrate element and the second thin film element, do not rub against each other. This prevents the first and second thin film elements from generating static electricity, thus preventing them from adsorbing radioactive particles from the environment. This avoids radioactive particle contamination in the environment, and as a result, subsequent detection will not be affected by a large number of radioactive particles. Therefore, the specificity and accuracy of the detection results will not be affected, thereby improving the specificity and accuracy of the detection results. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the devices shown in these drawings without creative effort.

[0022] Figure 1 An exploded view of a carbon dioxide collection device according to one embodiment;

[0023] Figure 2 This is a cross-sectional isometric view of a flexible support structure according to one embodiment;

[0024] Figure 3 This is a cross-sectional isometric view of a carbon dioxide collection device during the blowing process, according to one embodiment.

[0025] Among them, 100 is a flexible support structure; 110 is a cavity; 120 is a first through hole; 130 is a second through hole; 140 is an air inlet; 150 is an air outlet; 200 is a first substrate element; 210 is a carbon dioxide absorbent; 300 is a first thin film element; 400 is a second substrate element; and 500 is a second thin film element.

[0026] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the descriptions involving "first," "second," etc., in the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0029] like Figure 1-3 As shown, the present invention provides a carbon dioxide collection device, which includes a flexible support structure 100, a first substrate element 200, a first thin film element 300, a second substrate element 400, and a second thin film element 500. The flexible support structure 100 has a cavity 110 inside. A first through hole 120 and a second through hole 130 communicating with the cavity 110 are respectively opened on opposite sides of the flexible support structure 100. An air inlet 140 and an air outlet 150 communicating with the cavity 110 are respectively opened at opposite ends of the flexible support structure 100. The first substrate element 200 is connected to the first through hole 120 and covers the first through hole 120. A carbon dioxide absorbent 210 is attached to the side of the first substrate element 200 away from the second through hole 130. The first thin film element 300 is connected to the first substrate element 400 and the second thin film element 500. A substrate element 200 has carbon dioxide absorbent 210 attached to one side, and covers the first substrate element 200 and the first through hole 120 to achieve a seal for the first through hole 120; a second substrate element 400 is connected to the second through hole 130 and covers the second through hole 130, and carbon dioxide absorbent 210 is also attached to the side of the second substrate element 400 away from the first through hole 120; both the first substrate element 200 and the second substrate element 400 are made of breathable material; a second thin film element 500 is connected to the side of the second substrate element 400 with carbon dioxide absorbent 210 attached, and covers the second substrate element 400 and the second through hole 130 to achieve a seal for the second through hole 130; both the first thin film element 300 and the second thin film element 500 are made of a material that can be penetrated by beta rays.

[0030] During the urea breath test, the patient first ingests urea [14C]. After a suitable time, the patient exhales into the air inlet 140 of the carbon dioxide collection device. The patient's exhaled air swirls within the cavity 110 and passes through the first substrate element 200 and the second substrate element 400. The carbon dioxide containing carbon 14 in the exhaled air is absorbed by the carbon dioxide absorbent 210 attached to the first substrate element 200 and the second substrate element 400 and reacts with the carbon dioxide absorbent 210. Excess exhaled air is discharged through the air outlet 150. Finally, the carbon dioxide collection device is placed in the breath tester for detection. The carbon dioxide absorbent 210 attached to the first substrate element 200 and the second substrate element 400 emits β rays, which penetrate the corresponding first substrate element 200 and the second substrate element 400 respectively, and reach the detector of the breath tester, thereby detecting the carbon 14 concentration in the carbon dioxide absorbent 210. This allows for the measurement of whether the carbon 14 concentration in the patient's exhaled air has increased, thus determining whether the patient is infected with Helicobacter pylori. As the patient's exhaled air flows within the cavity, it passes through the first substrate element 200 and the second substrate element 400. The exhaled air also flows between the first substrate element 200 and the first film element 300, and between the second substrate element 400 and the second film element 500. This allows the exhaled air to flow simultaneously on opposite sides of the first substrate element 200 and the second substrate element 400, increasing the contact area between the exhaled air and the first substrate element 200 and the second substrate element 400. The first substrate element 200 and the second substrate element 400 react fully with the carbon dioxide in the exhaled air, improving the carbon dioxide absorption rate. Because the flexible support structure 100 is flexible, it bulges outwards as the patient's exhaled air is transported within the cavity 110. Under the action of exhalation, the first substrate element 200 bulges towards the first film element 300. This design ensures that the first substrate element 200 and the first thin film element 300 are tightly bonded together, and that the second substrate element 400 bulges towards the second thin film element 500. This tight bonding prevents the first substrate element 200 and the first thin film element 300 from separating, and also prevents the second substrate element 400 and the second thin film element 500 from generating static electricity. Consequently, the first thin film element 300 and the second thin film element 500 will not adsorb radioactive particles from the environment, thus avoiding contamination of the first thin film element 300 and the second thin film element 500 by airborne radioactive particles. This prevents interference from a large number of radioactive particles during subsequent detection, ensuring that the specificity and accuracy of the detection results are not affected, thereby improving the specificity and accuracy of the detection results.

[0031] In this embodiment, since the present application includes both a first substrate element 200 and a second substrate element 400, compared with the prior art which only has one substrate element, the present application simultaneously provides a first substrate element 200 and a second substrate element 400, resulting in a higher surface adhesion rate of the carbon dioxide absorbent 210. Both sides of the first substrate element 200 and the second substrate element 400 of the present application are in full contact with exhaled air, thereby ensuring that the carbon dioxide absorbent 210 on the first substrate element 200 and the second substrate element 400 can fully react with the carbon dioxide in the exhaled air, resulting in a higher carbon dioxide absorption rate.

[0032] In the actual scheme, when exhaled air flows between the first substrate element 200 and the first thin film element 300, and between the second substrate element 400 and the second thin film element 500, small gaps may exist between the two substrate elements and their corresponding thin film elements. This can cause the two substrate elements and their corresponding thin film elements to come into contact and separate, generating a small amount of static electricity. On the one hand, the static electricity generated at this time is very small and has little impact on the detection results. On the other hand, when exhaled air acts on the two substrate elements, it will cause the two substrate elements and their corresponding thin film elements to come into close contact again. Since the electrostatic charges between the two substrate elements and their corresponding thin film elements are opposite, the static electricity of the two thin film elements will be induced to their corresponding substrate elements for neutralization, thereby eliminating the static electricity on the outer surface of the two thin film elements.

[0033] In this embodiment, the carbon dioxide absorbent 210 is an inorganic alkaline substance. Specifically, the inorganic alkaline substance is lithium hydroxide, calcium hydroxide, or sodium hydroxide, etc. Since carbon dioxide is slightly acidic, the inorganic alkaline substance can react with carbon dioxide to form corresponding salts, such as sodium hydroxide reacting with carbon dioxide to form sodium carbonate or sodium bicarbonate.

[0034] In this embodiment, the outer periphery of the first thin film element 300 and the outer periphery of the first substrate element 200 are connected to the side of the flexible support structure 100 where the first through hole 120 is provided by an adhesive; the outer periphery of the second thin film element 500 and the outer periphery of the second substrate element 400 are connected to the side of the flexible support structure 100 where the second through hole 130 is provided by an adhesive. Specifically, the dimensions of the first thin film element 300 and the first substrate element 200 are larger than the dimensions of the first through hole 120, thereby ensuring that the first thin film element 300 and the first substrate element 200 can completely cover the first through hole 120, and facilitating the bonding of the outer periphery of the first thin film element 300 and the outer periphery of the first substrate element 200 to the flexible support structure 100; the dimensions of the second thin film element 500 and the second substrate element 400 are larger than the dimensions of the second through hole 130, thereby ensuring that the second thin film element 500 and the second substrate element 400 can completely cover the second through hole 130, and facilitating the bonding of the outer periphery of the second thin film element 500 and the outer periphery of the second substrate element 400 to the flexible support structure 100. The outer periphery of the first thin film element 300 and the outer periphery of the first substrate element 200 are connected to the inner side of the flexible support structure 100 by an adhesive, thereby making the connection more reliable and preventing the first thin film element 300 and the first substrate element 200 from easily detaching from the flexible support structure 100; the outer periphery of the second thin film element 500 and the outer periphery of the second substrate element 400 are connected to the inner side of the flexible support structure 100 by an adhesive, thereby making the connection more reliable and preventing the second thin film element 500 and the second substrate element 400 from easily detaching from the flexible support structure 100.

[0035] refer to Figure 1 The first substrate element 200, the first thin film element 300, the second substrate element 400, and the second thin film element 500 are all circular or near-circular sheet-like structures. Specifically, when subsequently detecting the carbon-14 concentration, the detection port of the detection instrument is circular. Therefore, the first substrate element 200, the first thin film element 300, the second substrate element 400, and the second thin film element 500 are configured with shapes that match the detection port, facilitating the detection process.

[0036] refer to Figure 1 The diameter of the first substrate element 200 is 4-8 mm, and the diameters of the first thin film element 300, the second substrate element 400, and the second thin film element 500 are all the same as the diameter of the first substrate element 200. Specifically, the diameter of the first substrate element 200 is larger than the diameters of the first through hole 120 and the second through hole 130, thereby ensuring that the first through hole 120 and the second through hole 130 can be completely covered.

[0037] In this embodiment, the first substrate element 200 and the second substrate element 400 are non-woven fabrics. Specifically, the non-woven fabric is selected as either spunlace or needle-punched. In this embodiment, spunlace non-woven fabric is used because spunlace non-woven fabric has many relatively regular small holes, which facilitates the flow of exhaled air.

[0038] The thickness of the first substrate element 200 and the second substrate element 400 is 0.6mm-1.2mm. In this embodiment, the thickness of the first substrate element 200 and the second substrate element 400 is 0.8mm. Specifically, if the first substrate element 200 and the second substrate element 400 are too thick, their flexibility is poor and they are not easy to adhere; if the first substrate element 200 and the second substrate element 400 are too thin, it is not convenient for the carbon dioxide absorbent 210 to adhere, and if they are too thin, the process requirements are high and the cost is high.

[0039] In this embodiment, the first thin film element 300 and the second thin film element 500 are made of transparent material to ensure that β rays can penetrate them. Furthermore, the first thin film element 300 and the second thin film element 500 are made of polyester material. Specifically, polyester material has a low elongation at break and low haze, thus making the first thin film element 300 and the second thin film element 500 relatively stable, and giving them good gloss and transparency, resulting in better imaging.

[0040] The thickness of the first thin film element 300 and the second thin film element 500 is 0.015mm-0.05mm. In this embodiment, the thickness of the first thin film element 300 and the second thin film element 500 is 0.03mm. From a detection perspective, the smaller the thickness of the first thin film element 300 and the second thin film element 500, the better, as a smaller thickness results in better imaging. However, if the thickness of the first thin film element 300 and the second thin film element 500 is too small, they are easily broken.

[0041] Specifically, the flexible support structure 100 is made of soft plastic material, or the flexible support structure 100 is an aluminum-plastic composite film. In this embodiment, the flexible support structure 100 is an aluminum-plastic composite film because the aluminum-plastic composite film has good water and carbon dioxide barrier properties, which is beneficial for the preservation of carbon dioxide absorbent 210 on the first substrate element 200 and the second substrate element 400.

[0042] In this embodiment, the aperture of the air outlet 150 is 1-2 mm. Specifically, the aperture of the air outlet 150 is relatively small to prevent a large amount of exhaled air from being discharged through the air outlet 150 before it has fully reacted with the carbon dioxide absorbent 210, thereby ensuring the reliability of subsequent detection.

[0043] Specifically, the diameter of the air inlet 140 is about 1 cm. The large diameter of the air inlet 140 makes it easier for the patient's exhaled air to enter the cavity 110 of the flexible support structure 100 through the air inlet 140.

[0044] refer to Figure 1 The cross-sectional dimensions of the cavity 110 of the flexible support structure 100 gradually increase from one end of the air inlet 140 to the middle, while the cross-sectional dimensions of the cavity 110 remain unchanged from the middle to one end of the air outlet 150.

[0045] The carbon dioxide collection device of this application and commercially available gas collection cards were used in a urea breath test. The comparison of various evaluation indicators is shown in the table below:

[0046]

[0047]

[0048] As can be seen from the above, compared with commercially available gas collection cards, the carbon dioxide collection device of this application does not affect the detection sensitivity, and the carbon dioxide saturation absorption rate, detection specificity and accuracy are significantly improved.

[0049] Using the carbon dioxide collection device of this application, the first and second thin film elements will not adversely affect the penetration of β rays; the two-piece design (referring to the simultaneous setting of the first and second substrate elements) results in a higher surface adhesion rate of the carbon dioxide absorbent, a higher carbon dioxide absorption rate, and a higher β ray penetration efficiency; at the same time, since the interference of pollutants in the air is avoided, the specificity and accuracy of the Helicobacter pylori detection results are significantly improved.

[0050] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent device transformations made based on the inventive concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A carbon dioxide collection device, characterized in that, include: A flexible support structure has an internal cavity. A first through hole and a second through hole communicating with the cavity are respectively opened on opposite sides of the flexible support structure. An air inlet and an air outlet communicating with the cavity are respectively opened at opposite ends of the flexible support structure. A first substrate element is connected to the first through hole and covers the first through hole. A carbon dioxide absorbent is attached to the side of the first substrate element opposite to the second through hole. A first thin film element is connected to the side of the first substrate element to which the carbon dioxide absorbent is attached, and covers the first substrate element and the first through hole to achieve a seal on the first through hole. A second substrate element is connected to the second through hole and covers the second through hole. A carbon dioxide absorbent is also attached to the side of the second substrate element facing away from the first through hole. Both the first and second substrate elements are made of breathable material. The second thin film element is connected to the side of the second substrate element to which the carbon dioxide absorbent is attached, and covers the second substrate element and the second through hole to achieve a seal for the second through hole. Both the first thin film element and the second thin film element are made of a material that can be penetrated by beta rays.

2. The carbon dioxide collection device as described in claim 1, characterized in that, The outer periphery of the first thin film element and the outer periphery of the first substrate element are connected to the side of the flexible support structure where the first through hole is formed by an adhesive; the outer periphery of the second thin film element and the outer periphery of the second substrate element are connected to the side of the flexible support structure where the second through hole is formed by an adhesive.

3. The carbon dioxide collection device as described in claim 1, characterized in that, The first substrate element, the first thin film element, the second substrate element, and the second thin film element are all circular or near-circular sheet structures.

4. The carbon dioxide collection device as described in claim 3, characterized in that, The diameter of the first substrate element is 4-8 mm, and the diameters of the first thin film element, the second substrate element, and the second thin film element are all the same as the diameter of the first substrate element.

5. The carbon dioxide collection device as described in claim 4, characterized in that, The diameter of the first substrate element is larger than the diameters of the first through hole and the second through hole.

6. The carbon dioxide collection device as described in claim 1, characterized in that, The first substrate element and the second substrate element are nonwoven fabrics, and the thickness of the first substrate element and the second substrate element is 0.6mm-1.2mm.

7. The carbon dioxide collection device as described in claim 1, characterized in that, The carbon dioxide absorbent is an inorganic alkaline substance, which is lithium hydroxide, calcium hydroxide, or sodium hydroxide.

8. The carbon dioxide collection device as described in claim 1, characterized in that, The first and second film elements are made of polyester material, and the thickness of the first and second film elements is 0.015mm-0.05mm.

9. The carbon dioxide collection device as described in claim 1, characterized in that, The flexible support structure is made of soft plastic material, or the flexible support structure is an aluminum-plastic composite film.

10. The carbon dioxide collection device as described in claim 1, characterized in that, The diameter of the air outlet is 1-2 mm.

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