CN110947092A - One-way valve and medical catheter with same - Google Patents
One-way valve and medical catheter with same Download PDFInfo
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- CN110947092A CN110947092A CN201911008104.6A CN201911008104A CN110947092A CN 110947092 A CN110947092 A CN 110947092A CN 201911008104 A CN201911008104 A CN 201911008104A CN 110947092 A CN110947092 A CN 110947092A
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- way valve
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- catheter body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
本发明属于医疗器械领域，具体涉及一种单向阀及具有其的医用导管。所述单向阀包括：固定部，所述固定部用于连接医用导管的导管本体的内壁，在所述固定部上设有过流孔；变形部，所述变形部与所述固定部连接，所述变形部具有第一形态和第二形态，所述变形部处于所述第一形态时封堵所述过流孔，所述变形部处于所述第二形态时解除对所述过流孔的封堵，所述导管本体中的液体沿第一方向流动时驱使所述变形部进入第一形态，所述导管本体中的液体沿第二方向流动时驱使所述变形部进入第二形态。本发明实施例的单向阀为纯机械式的结构，无需通过电路进行控制，也无需考虑在液体环境下的密封问题，因此结构相对简单，制作成本相对较低。
The invention belongs to the field of medical devices, and in particular relates to a one-way valve and a medical catheter having the same. The one-way valve includes: a fixing part, which is used for connecting the inner wall of the catheter body of the medical catheter, and a flow-through hole is arranged on the fixing part; and a deformation part, which is connected with the fixing part the deformation part has a first form and a second form, when the deformation part is in the first form, the overflow hole is blocked, and when the deformation part is in the second form, the overcurrent is released The plugging of the hole, when the liquid in the conduit body flows in the first direction, the deformation part is driven into the first form, and the liquid in the conduit body flows in the second direction, the deformation part is driven into the second form . The one-way valve of the embodiment of the present invention has a purely mechanical structure, which does not need to be controlled by a circuit, and does not need to consider the sealing problem in a liquid environment, so the structure is relatively simple and the manufacturing cost is relatively low.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a one-way valve and a medical catheter with the same.
Background
Medical catheters are widely used in a variety of medical devices requiring fluid delivery, such as the most common infusion catheters. When applied to implantable/interventional medical devices, medical catheters have more stringent requirements for their mechanical properties and biocompatibility. In addition, in some application scenarios, the medical catheter is required to have some special properties, such as one-way fluidity. Taking the medical catheter of the implantable insulin pump as an example, if the medical catheter does not have one-way fluidity, body fluid can be contacted with the drug solution in the medical catheter, so that the drug is polluted, and in addition, insulin in the drug solution in the medical catheter is easy to crystallize, so that the subsequent delivery of the drug solution is blocked, and the treatment effect is influenced.
In the related art, the medical catheter usually realizes one-way fluidity through a one-way valve, most of the existing one-way valves are controlled through a circuit, and the problem of sealing needs to be considered under a liquid environment, so that the structure is complex and the cost is high.
Disclosure of Invention
The invention aims to at least solve the problems of complex structure and high cost of the one-way valve of the existing medical catheter. The purpose is realized by the following technical scheme:
an embodiment of a first aspect of the present invention provides a one-way valve for a medical catheter, the one-way valve comprising: the fixing part is used for connecting the inner wall of the catheter body of the medical catheter, and the fixing part is provided with a overflowing hole; the deformation part is connected with the fixing part and has a first shape and a second shape, the deformation part is used for plugging the overflowing hole when in the first shape, the deformation part is used for releasing the plugging of the overflowing hole when in the second shape, the deformation part is driven to enter the first shape when liquid in the catheter body flows along a first direction, and the deformation part is driven to enter the second shape when the liquid in the catheter body flows along a second direction.
According to the one-way valve provided by the embodiment of the invention, the one-way valve comprises the fixing part and the deformation part, the deformation part can be converted between the first state and the second state under the action of liquid in the catheter body of the medical catheter, the deformation part can block the overflowing hole on the fixing part when being in the first state, the deformation part can be unblocked when being in the second state, the deformation part is driven to enter the first state when the liquid in the catheter body flows along the first direction, and the deformation part is driven to enter the second state when the liquid in the catheter body flows along the second direction, so that the liquid in the catheter body can be ensured to pass through the overflowing hole only when the liquid flows along the second direction, and the one-way flow of the liquid in the catheter body can be realized. In addition, the one-way valve provided by the embodiment of the invention is of a pure mechanical structure, and does not need to be controlled through a circuit or consider the sealing problem in a liquid environment, so that the structure is relatively simple, and the manufacturing cost is relatively low.
In addition, the check valve according to the embodiment of the invention may further have the following additional technical features:
in some embodiments of the present invention, the deformation portion includes a plurality of pieces of bionic valves, a mouth portion is formed between the plurality of pieces of bionic valves, ends of the plurality of pieces of bionic valves can approach each other under the action of the liquid flowing along the first direction to close the mouth portion, and ends of the plurality of pieces of bionic valves can move away from each other under the action of the liquid flowing along the second direction to open the mouth portion.
In some embodiments of the invention, the number of the biomimetic valves is three.
In some embodiments of the present invention, the material of the bionic valve is one of polyethylene, polypropylene, nylon, polyetheretherketone, polytetrafluoroethylene, polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
In some embodiments of the invention, the deformation portion is a blade that is rotatably connected to the fixed portion.
In some embodiments of the present invention, the number of the blades is two, the check valve further includes a connecting shaft disposed in the overflowing hole, the connecting shaft passes through the center of the overflowing hole, and both of the blades are rotatably connected to the connecting shaft.
In some embodiments of the present invention, the overflowing hole is a tapered hole tapering along the first direction, and the outer edge of the vane is a curved surface matching with a wall surface of the tapered hole.
In some embodiments of the present invention, the material of which the check valve is made is at least one of titanium alloy, stainless steel, aluminum alloy, magnesium aluminum alloy, nickel alloy, polyethylene, polypropylene, nylon, polyetheretherketone, polytetrafluoroethylene, polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
In some embodiments of the invention, the fixing portion is a fixing ring.
An embodiment of the second aspect of the present invention provides a medical catheter, including a catheter body and a one-way valve disposed in the catheter body, where the one-way valve is the one-way valve in any of the above embodiments.
According to the medical catheter of the embodiment of the invention, the medical catheter comprises a catheter body and the one-way valve arranged in the catheter body, wherein the one-way valve comprises a fixing part and a deformation part, the deformation part can be switched between a first state and a second state under the action of liquid in the catheter body of the medical catheter, the deformation part blocks the overflowing hole in the fixing part when in the first state, the blockage of the overflowing hole is released when in the second state, the deformation part is driven to enter the first state when the liquid in the catheter body flows along the first direction, and the deformation part is driven to enter the second state when the liquid in the catheter body flows along the second direction, so that the liquid in the catheter body can be ensured to pass through the overflowing hole only when the liquid flows along the second direction, and the one-way flow of the liquid in the catheter body is realized. Because the check valve is of a pure mechanical structure, the check valve does not need to be controlled through a circuit and does not need to consider the sealing problem under the liquid environment, the structure is relatively simple, and the manufacturing cost is relatively low.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings.
In the drawings:
FIG. 1 is a schematic view of a medical catheter in accordance with an embodiment of the present invention (with the one-way valve in a first configuration);
FIG. 2 is a schematic view of a medical catheter in accordance with an embodiment of the present invention (with the one-way valve in a second configuration);
FIG. 3 is a schematic view of a one-way valve according to one embodiment of the present invention;
FIG. 4 is a schematic view of a check valve according to another embodiment of the present invention (in a first configuration);
FIG. 5 is a schematic side view of the structure shown in FIG. 4;
FIG. 6 is a schematic view of a one-way valve (in a second configuration) according to another embodiment of the invention.
The reference symbols in the drawings denote the following:
100: a medical catheter;
10: a one-way valve;
11: fixing section, 111: flow-passing hole, 12: deformation portion, 121: bionic valve, 122: mouth part, 123: blade, 13: a connecting shaft;
20: a catheter body.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 6, an embodiment of a first aspect of the present invention proposes a check valve 10 for a medical catheter 100, the check valve 10 including a fixing portion 11 and a deforming portion 12. Specifically, the fixing portion 11 is used for connecting the inner wall of the catheter body 20 of the medical catheter 100, and an overflowing hole 111 is provided on the fixing portion 11, and the overflowing hole 111 is used for allowing the liquid in the catheter body 20 to pass through the one-way valve 10. The deformable portion 12 is connected to the fixed portion 11, the deformable portion 12 has a first form and a second form which are mutually switchable, the deformable portion 12 blocks the overflowing hole 111 when in the first form, at which time, the liquid in the catheter body 20 cannot pass through the overflowing hole 111, and the deformable portion 12 unblocks the overflowing hole 111 when in the second form, at which time, the liquid in the catheter body 20 can pass through the overflowing hole 111. The deformation 12 is urged into the first configuration when liquid in the catheter body 20 flows in a first direction and the deformation 12 is urged into the second configuration when liquid in the catheter body 20 flows in a second direction.
It will be readily understood that the liquid may have two opposite flow directions in the conduit body 20, if one is defined as a first direction, the other is defined as a second direction.
The check valve 10 according to the embodiment of the invention comprises the fixing part 11 and the deformation part 12, the deformation part 12 can be switched between the first state and the second state under the action of the liquid in the catheter body 20 of the medical catheter 100, the deformation part 12 blocks the overflowing hole 111 on the fixing part 11 when being in the first state, the deformation part 12 unblocks the overflowing hole 111 when being in the second state, and the deformation part 12 is driven to enter the first state when the liquid in the catheter body 20 flows along the first direction, and the deformation part 12 is driven to enter the second state when the liquid in the catheter body 20 flows along the second direction, so that the liquid in the catheter body 20 can be ensured to pass through the overflowing hole 111 only when the liquid flows along the second direction, and the unidirectional flow of the liquid in the catheter body 20 is realized. In addition, the check valve 10 of the embodiment of the present invention is a purely mechanical structure, and does not need to be controlled by a circuit or consider the sealing problem in a liquid environment, so the structure is relatively simple, and the manufacturing cost is relatively low.
In some embodiments of the present invention, as shown in fig. 3, the deformation portion 12 includes a plurality of pieces of the bionic valve 121, a mouth portion 122 communicating with the overflowing hole 111 is formed between the plurality of pieces of the bionic valve 121, ends of the plurality of pieces of the bionic valve 121 can approach each other under the action of the liquid flowing along the first direction to close the mouth portion 122, and ends of the plurality of pieces of the bionic valve 121 can move away from each other under the action of the liquid flowing along the second direction to open the mouth portion 122.
In this embodiment, the deformation 12 comprises a plurality of biomimetic valves 121, which primarily mimic the aortic valve in an animal. When the liquid in the catheter body 20 flows along the second direction, the ends of the plurality of bionic valves 121 are far away from each other under the impact of the liquid, so that the mouth part 122 is opened, at this time, the liquid can pass through the overflowing hole 111, when the liquid in the catheter body 20 flows along the first direction, the ends of the bionic valves 121 are close to each other under the impact of the liquid, namely, the bionic valves 121 are folded, so that the mouth part 122 is closed, at this time, the liquid cannot pass through the overflowing hole 111.
Further, the number of the bionic valve 121 is at least two, that is, the two bionic valves 121 are the minimum requirement for achieving the occlusion and contact occlusion of the overflowing hole 111. Preferably, the number of the bionic valves 121 is three, so that the overflowing holes 111 can be better blocked, and the number of the bionic valves 121 is relatively small, thereby reducing the processing cost.
Further, the bionic valve 121 should have a certain deformability, and therefore, the preferable material may be one of polyethylene, polypropylene, nylon, polyetheretherketone, polytetrafluoroethylene, polyoxymethylene, ABS (Acrylonitrile butadiene styrene), PBT (Polybutylene terephthalate), and polyphenylene sulfide.
In other embodiments of the present invention, as shown in fig. 4-6, the deformation portion 12 is a vane 123 rotatably connected to the fixed portion 11, and the flow hole 111 can be blocked and unblocked by the rotation of the vane 123, so as to realize a unidirectional flow of liquid in the catheter body 20.
Further, the number of the blades 123 is two, the check valve 10 further includes a connecting shaft 13 disposed in the overflowing hole 111, the connecting shaft 13 passes through the center of the overflowing hole 111, and both the blades 123 are rotatably connected with the connecting shaft 13. In this embodiment, the connecting shaft 13 passes through the center of the overflowing hole 111, and two of the blades 123 are rotatably connected to the connecting shaft 13, so that the blades 123 are substantially symmetrically arranged with respect to the connecting shaft 13, and when the liquid passes through the overflowing hole 111 with the two blades 123 open, the flow rates of the liquid portions are substantially equal, thereby ensuring the smoothness of the liquid flow.
Further, the overflowing hole 111 is a tapered hole which is gradually reduced along the first direction, the outer edge of the blade 123 is a curved surface which is matched with the wall surface of the tapered hole, the overflowing hole 111 is set to be the tapered hole, and the blade 123 can be limited, so that the blade 123 is ensured not to rotate continuously after being rotated to block the overflowing hole 111. On the other hand, the sealing performance of the vane 123 in closing the overflowing hole 111 can be enhanced.
Further, the check valve 10 may be made of a metal material or a polymer material, such as at least one of titanium alloy, stainless steel, aluminum alloy, magnesium aluminum alloy, nickel alloy, polyethylene, polypropylene, nylon, polyetheretherketone, polytetrafluoroethylene, polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
In some embodiments of the present invention, the fixing portion 11 is a fixing ring, and the outer diameter of the fixing ring can be matched with the inner diameter of the catheter body 20, so as to ensure the assembling stability between the fixing ring and the catheter body 20. Further, the fixing ring and the catheter body 20 may be connected by injection molding, bonding, sewing, or fixing with a bracket.
An embodiment of the second aspect of the present invention provides a medical catheter 100, which includes a catheter body 20 and a one-way valve 10 disposed in the catheter body 20, wherein the one-way valve 10 is the one-way valve 10 in any one of the embodiments described above.
The medical catheter 100 according to the embodiment of the present invention, which comprises a catheter body 20 and a one-way valve 10 disposed in the catheter body 20, wherein the check valve 10 comprises a fixed part 11 and a deformable part 12, the deformable part 12 can be switched between a first state and a second state under the action of liquid in a catheter body 20 of the medical catheter 100, the deformable part 12 blocks the overflowing hole 111 on the fixed part 11 when in the first state, the deformable part 12 releases the blocking of the overflowing hole 111 when in the second state, and, the liquid in the conduit body 20 drives the deformation 12 into the first form when flowing in the first direction, the liquid in the conduit body 20 drives the deformation 12 into the second form when flowing in the second direction, this ensures that the liquid in the catheter body 20 can only pass through the overflowing hole 111 when flowing in the second direction, thereby achieving unidirectional flow of the liquid in the catheter body 20. The check valve 10 is of a purely mechanical structure, so that control through a circuit is not needed, and the sealing problem in a liquid environment is not needed to be considered, so that the structure is relatively simple, and the manufacturing cost is relatively low.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A one-way valve for a medical catheter, the one-way valve comprising:
the fixing part is used for connecting the inner wall of the catheter body of the medical catheter, and the fixing part is provided with a overflowing hole;
the deformation part is connected with the fixing part and has a first shape and a second shape, the deformation part is used for plugging the overflowing hole when in the first shape, the deformation part is used for releasing the plugging of the overflowing hole when in the second shape, the deformation part is driven to enter the first shape when liquid in the catheter body flows along a first direction, and the deformation part is driven to enter the second shape when the liquid in the catheter body flows along a second direction.
2. The one-way valve of claim 1, wherein the deformation portion comprises a plurality of pieces of bionic valves, a mouth portion is formed between the plurality of pieces of bionic valves, ends of the plurality of pieces of bionic valves can approach each other under the action of the liquid flowing along the first direction to enable the mouth portion to be closed, and ends of the plurality of pieces of bionic valves can move away from each other under the action of the liquid flowing along the second direction to enable the mouth portion to be opened.
3. The one-way valve of claim 2, wherein the number of the biomimetic valves is three.
4. The check valve of claim 2, wherein the bionic valve is made of one of polyethylene, polypropylene, nylon, polyetheretherketone, polytetrafluoroethylene, polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
5. The check valve of claim 1, wherein the deformation portion is a blade rotatably connected to the fixed portion.
6. The check valve of claim 5, wherein there are two of the vanes, the check valve further comprising a connecting shaft disposed in the flow hole, the connecting shaft passing through a center of the flow hole, both of the vanes being rotatably connected to the connecting shaft.
7. The check valve of claim 6, wherein the flow hole is a tapered hole tapered in the first direction, and the outer edge of the vane is a curved surface that fits the wall surface of the tapered hole.
8. The check valve of claim 5, wherein the check valve is made of at least one of titanium alloy, stainless steel, aluminum alloy, magnesium aluminum alloy, nickel alloy, polyethylene, polypropylene, nylon, polyetheretherketone, polytetrafluoroethylene, polyoxymethylene, ABS, PBT, and polyphenylene sulfide.
9. The check valve of any one of claims 1 to 8, wherein the fixation portion is a fixation ring.
10. A medical catheter comprising a catheter body and a one-way valve disposed in the catheter body, the one-way valve being in accordance with any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008104.6A CN110947092A (en) | 2019-10-22 | 2019-10-22 | One-way valve and medical catheter with same |
| PCT/CN2020/122502 WO2021078155A1 (en) | 2019-10-22 | 2020-10-21 | One-way valve and medical catheter having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911008104.6A CN110947092A (en) | 2019-10-22 | 2019-10-22 | One-way valve and medical catheter with same |
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| Publication Number | Publication Date |
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| CN110947092A true CN110947092A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911008104.6A Pending CN110947092A (en) | 2019-10-22 | 2019-10-22 | One-way valve and medical catheter with same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110947092A (en) |
| WO (1) | WO2021078155A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021078155A1 (en) * | 2019-10-22 | 2021-04-29 | 杭州未名信科科技有限公司 | One-way valve and medical catheter having same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021078155A1 (en) * | 2019-10-22 | 2021-04-29 | 杭州未名信科科技有限公司 | One-way valve and medical catheter having same |
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