Rotatable multi-lumen catheter assembly

Abstract

The embodiment of the utility model provides a rotatable multi-cavity catheter assembly. The rotatable multi-cavity catheter assembly comprises a catheter and at least one connector. The catheter is provided with at least two tube cavities which are isolated from each other, each tube cavity extends in the axial direction of the catheter, at least one tube cavity is a fluid conveying cavity, and a first opening communicated with the fluid conveying cavity is formed in the side wall of the catheter. The connector comprises an outer shell and an inner shell, and the inner shell is arranged outside the guide pipe in a sleeving mode and fixedly connected with the outer side wall of the guide pipe. The inner shell is sleeved with the outer shell in a rotatable mode, the outer shell and the inner shell are sealed, an inner cavity is defined by the outer shell and the inner shell jointly, a second opening is formed in the outer shell, and the first opening is communicated with the second opening through the inner cavity. According to the invention, the guide pipe can be flexibly and freely rotated without being restrained and interfered by the connecting pipe.

Description

Technical Field

[0001] The present application relates to the technical field of interventional medical devices, and in particular to a rotatable multi-lumen catheter assembly. Background Art

[0002] With the development of interventional therapy, interventional catheters with various functions have been gradually introduced in the domestic and foreign markets. With the increase of interventional catheter functions, catheters with double lumens, triple lumens or even more lumens have been widely used, for example, catheters include phase-separated injection lumens, suction lumens, and guidewire lumens.

[0003] Each lumen of the catheter usually needs to be connected to a corresponding pipeline to achieve drug delivery, waste liquid extraction, and guide wire delivery and withdrawal. However, the more pipelines are connected, the more inconvenient and inflexible the operation of the catheter is. For example, when the injection hole or suction hole of the catheter is only distributed on one side of the catheter, the user needs to rotate the catheter to improve the uniformity of injection and suction. For another example, for a mechanical thrombectomy catheter, the user also needs to rotate the catheter to achieve mechanical removal of the thrombus. Since the tail of the catheter is connected to at least two pipelines (called "connecting tubes") that are connected to each lumen, when the catheter is rotated, it may cause the connecting tube to twist and deform, or the rigidity of the connecting tube may hinder the flexible rotation of the catheter, so the user cannot freely rotate the existing catheter.

[0004] It should be noted that the above introduction to the background technology is only for the convenience of providing a clear and complete description of the technical solutions of the present application and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Utility Model Content

[0005] The purpose of the present application is to provide a rotatable multi-lumen catheter assembly to solve the problems pointed out in the above background technology or other similar problems.

[0006] The embodiment of the present application provides a rotatable multi-lumen catheter assembly, including a catheter and at least one connector. The catheter has at least two lumens isolated from each other, each of which extends along the axial direction of the catheter, at least one of which is a fluid delivery cavity, and a first opening connected to the fluid delivery cavity is provided on the side wall of the catheter. The connector includes an outer shell and an inner shell, the inner shell is sleeved outside the catheter and fixedly connected to the outer wall of the catheter; the outer shell is rotatably sleeved outside the inner shell and sealed with the inner shell, the outer shell and the inner shell together enclose an inner cavity, the outer shell is provided with a second opening, and the first opening is connected to the second opening through the inner cavity.

[0007] In some embodiments, the inner shell includes two connecting rings, which are respectively located at opposite ends of the inner cavity in the axial direction of the catheter, and the first opening is located between the two connecting rings.

[0008] In some embodiments, the joint further comprises a sealing ring, and the two connecting rings and the outer shell are sealed respectively by the sealing rings.

[0009] In some embodiments, a positioning structure is provided between the housing and the connecting ring to hold the sealing ring therebetween.

[0010] In some embodiments, the positioning structure includes a first groove provided on the outer wall of the connecting ring, and a second groove provided on the inner wall of the outer shell; the first groove corresponds to the second groove in the radial direction, and the first groove and the second groove jointly clamp the sealing ring in the radial direction.

[0011] In some embodiments, the positioning structure includes a first boss provided on the outer wall of the connecting ring and protruding radially outward, and a second boss provided on the inner wall of the outer shell and protruding radially inward; the first boss corresponds to and is spaced apart from the second boss in the axial direction, and the first boss and the second boss jointly clamp the sealing ring in the axial direction.

[0012] In some embodiments, at least one of the connecting rings has a grip portion protruding from the outer side of the housing, so that an operator can hold and rotate the catheter.

[0013] In some embodiments, at least two of the lumens are fluid delivery lumens; the multi-lumen catheter assembly includes at least two connectors, each of which is respectively sleeved on the outside of the catheter; each of the fluid delivery lumens is connected to the inner cavity of one of the connectors through at least one of the first openings.

[0014] In some embodiments, the shells of any two adjacent connectors are fixedly connected via a connector.

[0015] In some embodiments, the catheter has a proximal end and a distal end, the connector is disposed at the proximal end, and the first opening is disposed on a side wall of the proximal end.

[0016] In some embodiments, the multi-lumen catheter assembly further includes at least one connecting tube, each of the connectors is connected to at least one connecting tube, and the second opening of the connector is in communication with the connecting tube.

[0017] The embodiment of the present application connects the catheter to the connecting pipe and communicates the fluid by providing a joint, which not only enables the input of fluid from the connecting pipe into the catheter, or the output of fluid from the catheter to the connecting pipe, but also enables the catheter to be rotated flexibly and freely without being constrained or interfered by the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0019] Figure 1 is a structural schematic diagram of a multi-lumen catheter assembly of a first embodiment of the present application;

[0020] Figure 2 is a structural schematic diagram of a multi-lumen catheter assembly according to a second embodiment of the present application;

[0021] Figure 3 It is a schematic structural diagram of a multi-lumen catheter assembly according to the third embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0023] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements in terms of name, but do not represent the spatial arrangement or temporal order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the terms listed in association. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0024] In the embodiments of the present application, the singular forms "a", "the", etc. may include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise; in addition, the term "according to" should be understood as "at least partially based on...", and the term "based on" should be understood as "at least partially based on...", unless the context clearly indicates otherwise; in addition, the term "multi-cavity" means two or more cavities, unless otherwise specified.

[0025] The implementation of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0026] The embodiment of the present application provides a rotatable multi-lumen catheter assembly, the catheter of which can be rotated flexibly and freely without being affected by a connecting tube.

[0027] like Figures 1 to 3 As shown, the multi-lumen catheter assembly of the embodiment of the present application includes a catheter 1 and at least one connector 2.

[0028] The catheter 1 can be inserted into the patient's blood vessels. The catheter 1 has a proximal end 11 and a distal end (not shown). The distal end is the end away from the operator and can be inserted into the patient's blood vessels; the proximal end 11 is the end close to the operator and can be located outside the patient's body or inside the patient's body. The material of the catheter 1 can be PVC, PEBAX, PE and other commonly used interventional catheter materials. The catheter 1 can be an integrated structure or a split structure formed by connecting multiple tubes, which is not limited in this application.

[0029] like Figures 1 to 3 As shown, the catheter 1 has at least two lumens isolated from each other, each of which extends along the axial direction of the catheter 1, and at least one lumen is a fluid delivery lumen 12. The fluid delivery lumen 12 is used to deliver fluid, and the fluid can be a gas, a liquid, or a mixture of a liquid (such as blood) and a solid (such as thrombus fragments). For example, the fluid delivery lumen 12 of the catheter 1 can be a drug injection lumen or a suction lumen. The drug injection lumen is used to deliver drug fluid, and the drug can be a thrombolytic drug, and the suction lumen is used to aspirate thrombus fluid. The lumen of the catheter 1 can also be a guidewire lumen 14, and the guidewire lumen 14 is used to deliver the guidewire 10. The guidewire lumen 14 can be one or more, but at least one lumen among all the lumens of the catheter 1 serves as the fluid delivery lumen 12.

[0030] Of course, the catheter 1 may also include lumens for other purposes, which is not limited in the present application. Different lumens of the catheter 1 may be separated by a partition wall, which may be fixedly connected to the side wall of the catheter, for example, the partition wall and the side wall of the catheter may be integrally formed.

[0031] like Figures 1 to 3As shown, a first opening 13 connected to the fluid delivery cavity 12 is provided on the side wall of the catheter 1, so that fluid can be injected into the fluid delivery cavity 12 through the first opening 13, or the fluid in the fluid delivery cavity 12 can be output to the outside of the catheter 1 through the first opening 13. The shape of the first opening 13 can be any shape such as a circle, an ellipse, a polygon, etc., and the size of the first opening 13 can be set according to actual needs, and the present application does not impose any restrictions on this.

[0032] like Figures 1 to 3 As shown, the connector 2 is used to connect the catheter 1 with the connecting tube 3 and fluidly communicate with each other, that is, the connecting tube 3 is not directly connected to the catheter 1, but is connected to the catheter 1 through the connector 2. The number of connectors 2 is equal to the number of fluid delivery lumens 12. For example, when the catheter 1 has two fluid delivery lumens 12, two connectors 2 can be provided, wherein one connector 2 connects one fluid delivery lumen 12 with one connecting tube 3 and fluidly communicates with each other, and the other connector 2 connects another fluid delivery lumen 12 with another connecting tube 3 and fluidly communicates with each other.

[0033] like Figures 1 to 3 As shown, the connector 2 is disposed at the proximal end 11 of the catheter 1 to facilitate connection with the connecting tube 3 , and correspondingly, the first opening 13 is also disposed on the side wall of the proximal end 11 of the catheter 1 .

[0034] like Figures 1 to 3 As shown, the connector 2 includes an inner shell 21 and an outer shell 22, the inner shell 21 is sleeved outside the conduit 1, and is fixedly connected to the outer wall of the conduit 1. For example, the inner shell 21 and the outer shell 22 may be made of plastic, and the inner shell 21 and the outer wall of the conduit 1 may be fixedly and sealedly connected by bonding or welding. It should be understood that the inner shell 21 avoids the first opening 13 and does not cover the first opening 13.

[0035] like Figures 1 to 3 As shown, the outer shell 22 is rotatably mounted on the outer shell 21, that is, the outer shell 22 and the inner shell 21 are not relatively fixed, but can rotate relative to each other. The outer shell 22 and the inner shell 21 are sealed to prevent fluid leakage. The sealing between the outer shell 22 and the inner shell 21 can be achieved by a sealing ring 23 or other existing sealing members, as long as the outer shell 22 and the inner shell 21 can be sealed and the relative rotation of the two is not hindered.

[0036] like Figures 1 to 3 As shown, the outer shell 22 and the inner shell 21 together form an inner cavity 24, and a second opening 25 is provided on the outer shell 22, and the first opening 13 is connected to the second opening 25 through the inner cavity 24. The inner cavity 24 can be an annular inner cavity 24 surrounding the catheter 1, and one or more second openings 25 can be provided on the outer shell 22 for connecting one or more connecting pipes 3.

[0037] When using the multi-lumen catheter assembly of the embodiment of the present application, the second opening 25 of the outer shell 22 is connected to the connecting tube 3, so that the connecting tube 3, the second opening 25, the inner cavity 24, the first opening 13 and the fluid delivery cavity 12 are connected in sequence, so that the fluid can be input from the connecting tube 3 to the fluid delivery cavity 12, or the fluid can be output from the fluid delivery cavity 12 to the connecting tube 3. When it is necessary to rotate the catheter 1, the catheter 1 or the inner shell 21 of the connector 2 can be held by hand, and the catheter 1 and the inner shell 21 of the connector 2 can be rotated as a whole, while the outer shell 22 of the connector 2 and the connecting tube 3 remain stationary and do not rotate with the catheter 1 and the inner shell 21, so that the catheter 1 can be rotated flexibly and freely.

[0038] Figure 1 This is a schematic structural diagram of a multi-lumen catheter assembly according to the first embodiment of the present application.

[0039] like Figure 1 As shown, the multi-lumen catheter assembly includes a catheter 1 and a connector 2, wherein the catheter 1 has two lumens, one of which is a fluid delivery lumen 12, through which the fluid is delivered into or out of the human body, and the other is a guidewire lumen 14, through which the guidewire 10 is delivered into or out of the human body.

[0040] like Figure 1 As shown, the inner shell 21 includes two connecting rings 211 , which are respectively located at opposite ends of the inner cavity 24 in the axial direction of the catheter 1 , the two connecting rings 211 are spaced apart in the axial direction, and the first opening 13 is located between the two connecting rings 211 .

[0041] although Figure 1 It is shown that the fluid delivery cavity 12 is connected to the inner cavity 24 of the connector 2 through a first opening 13. In other embodiments, the fluid delivery cavity 12 is also connected to the inner cavity 24 of the connector 2 through two or more first openings 13 arranged at intervals, and the present application does not limit this.

[0042] like Figure 1 As shown, the joint 2 further includes a sealing ring 23, and the two connecting rings 211 and the housing 22 are sealed respectively by the sealing rings 23. The sealing ring 23 can be a sealing ring made of rubber material.

[0043] Optionally, in order to prevent the sealing ring 23 from falling off when the outer shell 22 and the connecting ring 211 rotate relative to each other, a positioning structure for holding the sealing ring therebetween is provided between the outer shell 22 and the connecting ring 211 .

[0044] exist Figure 1 In the embodiment of the present invention, the positioning structure is a positioning groove structure.

[0045] Specifically, Figure 1As shown, a first groove 212 is provided on the outer wall of each connecting ring 211, and two second grooves 221 are provided on the inner wall of the outer shell 22. The two second grooves 221 correspond to the two first grooves 212 in the radial direction respectively. The first grooves 212 and the second grooves 221 corresponding to each other clamp the sealing ring 23 in the radial direction to stably maintain the sealing ring 23 between the outer shell 22 and the connecting ring 211, prevent the sealing ring 23 from falling due to the relative rotation of the outer shell 22 and the connecting ring 211, and improve the sealing reliability.

[0046] although Figure 1 It is shown that a sealing ring 23 with a circular cross-section is provided between the outer shell 22 and each connecting ring 211. In other embodiments, multiple sealing rings 23 may also be provided between the outer shell 22 and each connecting ring 211 to enhance the sealing performance, and the cross-sectional shape of the sealing ring 23 may also be a rectangle or any other shape, which is not limited in the present application.

[0047] like Figure 1 As shown, a connecting ring 211 has a grip portion 213 protruding from the outer side of the housing 22 for an operator to hold and rotate the catheter 1 , so the connecting ring 211 can be used as a rotating handle 26 , and a separate handle does not need to be provided.

[0048] although Figure 1 It is shown that only one connecting ring 211 has a handle portion 213 . In other embodiments, a handle portion 213 may also be provided on another connecting ring 211 , and the present application does not impose any limitation on this.

[0049] like Figure 1 As shown, the multi-lumen catheter assembly includes a connecting tube 3 , which is connected to the housing 22 of the connector 2 and communicates with the second opening 25 of the connector 2 .

[0050] Figure 2 This is a schematic structural diagram of a multi-lumen catheter assembly according to a second embodiment of the present application.

[0051] like Figure 2 As shown, the difference between this embodiment and the first embodiment is that the positioning structure between the housing 22 and the connecting ring 211 is a positioning boss structure.

[0052] Specifically, Figure 2As shown, a first boss 214 protruding radially outward is provided on the outer side wall of the connecting ring 211, and a second boss 222 protruding radially inward is provided on the inner side wall of the outer shell 22. The first boss 214 and the second boss 222 correspond to each other and are spaced apart in the axial direction. The first boss 214 and the second boss 222 corresponding to each other jointly clamp the sealing ring 23 in the axial direction to stably maintain the sealing ring 23 between the outer shell 22 and the connecting ring 211, prevent the sealing ring 23 from falling off due to the relative rotation of the outer shell 22 and the connecting ring 211, and improve the sealing reliability.

[0053] Other structures of this embodiment can be set with reference to the examples of corresponding structures in the first embodiment and their alternative examples, so they are not described in detail.

[0054] Figure 3 This is a schematic structural diagram of a multi-lumen catheter assembly according to the third embodiment of the present application.

[0055] like Figure 3 As shown, the difference between this embodiment and the first embodiment is that the two lumens of the catheter 1 are both fluid delivery lumens 12, and the multi-lumen catheter assembly includes two connectors 2 and a connector 4.

[0056] like Figure 3 As shown, two first openings 13 are provided on the side wall of the catheter 1, and the two first openings 13 are respectively connected to the two fluid delivery cavities 12, and the two connectors 2 are respectively provided corresponding to the two first openings 13, and the inner cavities 24 of the two connectors 2 are respectively connected to the two fluid delivery cavities 12 through one first opening 13.

[0057] although Figure 3 It is shown that each fluid delivery lumen 12 is connected to the inner cavity 24 of a connector 2 through a first opening 13 . In other embodiments, each fluid delivery lumen 12 is also connected to the inner cavity 24 of a connector 2 through two or more first openings 13 arranged at intervals.

[0058] like Figure 3 As shown, the connecting ring 211 of one of the two connectors 2 has a gripping portion 213, while the connecting ring 211 of the other connector 2 does not have a gripping portion 213. However, the present application is not limited thereto, and in other embodiments, the gripping portions 213 may also be respectively provided on the connecting rings 211 of the two connectors 2.

[0059] like Figure 3 As shown, the multi-lumen catheter assembly includes two connecting tubes 3, the two connecting tubes 3 are fixedly connected to the outer shells 22 of the two connectors 2, and the two connecting tubes 3 are communicated with the second openings 25 of the two connectors 2, respectively.

[0060] although Figure 3The catheter 1 is shown to include two fluid delivery lumens 12, two connectors 2 and two connecting tubes 3. In other embodiments, the catheter 1 may also include three or more fluid delivery lumens 12. Correspondingly, the multi-lumen catheter assembly may include three or more connectors 2 and three or more connecting tubes 3.

[0061] like Figure 3 As shown, the shells 22 of the two joints 2 are fixedly connected by a connecting member 4, so that the shells 22 of different joints 2 are connected into a whole and keep a static state together. The connecting member 4 can be a plastic sheet, and the two ends of the plastic sheet can be connected to the shells 22 of the two joints 2 by bonding or welding. The connecting member 4 can also be a plastic ring, and the two ends of the plastic ring are respectively sleeved outside the shells 22 of the two joints 2, and can be connected to the shells 22 of the two joints 2 by bonding or welding.

[0062] The above description is only an embodiment of the present specification and is not intended to limit the present specification. For those skilled in the art, the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the scope of the claims of the present specification.

Claims

1. A rotatable multi-lumen catheter assembly, characterized in that: include: A catheter having at least two lumens isolated from each other, each of which extends along the axial direction of the catheter, at least one of which is a fluid delivery lumen, and a first opening communicating with the fluid delivery lumen is provided on a side wall of the catheter; at least one connector, the connector comprising: An inner shell, which is sleeved outside the conduit and fixedly connected to the outer side wall of the conduit; The outer shell is rotatably sleeved outside the inner shell and is sealed with the inner shell. The outer shell and the inner shell together form an inner cavity. The outer shell is provided with a second opening. The first opening is connected to the second opening through the inner cavity.

2. The multi-lumen catheter assembly according to claim 1, characterized in that: The inner shell includes two connecting rings, which are respectively located at opposite ends of the inner cavity in the axial direction of the catheter, and the first opening is located between the two connecting rings.

3. The multi-lumen catheter assembly according to claim 2, characterized in that: The joint further comprises a sealing ring, and the two connecting rings and the housing are sealed respectively by the sealing rings.

4. The multi-lumen catheter assembly according to claim 3, characterized in that: A positioning structure for holding the sealing ring between the housing and the connecting ring is provided between the housing and the connecting ring.

5. The multi-lumen catheter assembly according to claim 4, characterized in that: The positioning structure includes a first groove provided on the outer side wall of the connecting ring, and a second groove provided on the inner side wall of the outer shell; The first groove corresponds to the second groove in a radial direction, and the first groove and the second groove jointly clamp the sealing ring in the radial direction.

6. The multi-lumen catheter assembly according to claim 4, characterized in that: The positioning structure includes a first boss provided on the outer side wall of the connecting ring and protruding radially outward, and a second boss provided on the inner side wall of the housing and protruding radially inward; The first boss corresponds to and is spaced apart from the second boss in the axial direction, and the first boss and the second boss jointly clamp the sealing ring in the axial direction.

7. The multi-lumen catheter assembly according to claim 2, characterized in that: At least one of the connecting rings has a gripping portion protruding from the outer side of the housing, so that an operator can hold and rotate the catheter.

8. The multi-lumen catheter assembly according to any one of claims 1 to 6, characterized in that: At least two of the lumens are fluid delivery lumens; The multi-lumen catheter assembly comprises at least two connectors, each of which is sleeved outside the catheter; Each of the fluid delivery cavities is communicated with an inner cavity of the connector through at least one of the first openings.

9. The multi-lumen catheter assembly according to claim 8, characterized in that: The shells of any two adjacent joints are fixedly connected via a connecting piece.

10. The multi-lumen catheter assembly according to any one of claims 1 to 7, characterized in that: The catheter has a proximal end and a distal end, the joint is arranged at the proximal end, and the first opening is arranged on the side wall of the proximal end.

11. The multi-lumen catheter assembly according to any one of claims 1 to 7, characterized in that: Also includes: At least one connecting pipe, each of the joints is connected to at least one connecting pipe, and the second opening of the joint is communicated with the connecting pipe.

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