Thrombolytic catheter device

Abstract

The present invention provides a thrombolytic catheter device, which relates to the technical field of medical devices; it includes a tube body, a joint, a guide wire and a plugging piece; one end of the tube body is connected to the joint; the guide wire is placed in the tube body, one end of which is fixedly connected to the joint, and the other end is connected to the plugging piece; along the axial direction of the tube body, a plurality of sealing parts arranged at intervals are provided on the inner wall of the other end of the tube body; a sealing plug is provided at one end of the plugging piece connected to the guide wire, and the sealing plug is placed in the other end of the tube body and is sealed with at least one of the plurality of sealing parts. The present invention forms a dynamic sealing structure with the tube body by arranging a sealing part on the inner wall of the tube body. After the plugging part moves in one end of the tube body, or after a certain area at one end of the tube body is deformed to a certain extent, there is still a sealing part that can be sealed with the plugging part, thereby ensuring the sealing of the two, preventing the drug solution from directly flowing out of the central hole at the end of the catheter, and ensuring the treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a thrombolytic catheter device. Background Art

[0002] Peripheral vascular thrombotic obstructive diseases are divided into venous thromboembolism and arterial thromboembolism. The current conventional treatment methods for thrombosis include anticoagulation therapy, surgical treatment and catheter-based thrombolysis. Among them, the mechanism of catheter-based thrombolysis is to directly infuse high-concentration thrombolytic drugs around the thrombus through a thrombolytic catheter to dissolve the thrombus and achieve the treatment purpose.

[0003] During catheter thrombolysis, the thrombolytic catheter is equipped with a matching occluding guidewire, which includes a connected guidewire and an occluding piece. The occluding piece is used to block one end of the thrombolytic catheter so that when the thrombolytic solution is infused, the solution can flow out from the side hole of the catheter to flush the thrombus-affected area and ultimately dissolve the thrombus.

[0004] Due to the particularity of the operation, the material of the thrombolytic catheter needs to be soft material, while the material of the occluding guide wire is hard material. Therefore, when the two are deformed through the vascular channel, the two will move relative to each other, causing the occluding part to cause the thrombolytic catheter to deform, thereby destroying the seal of the two. When the drug solution is injected, the drug solution flows directly out from the central hole at the end of the catheter instead of flowing out from the side hole of the catheter. The drug solution does not directly remain in the thrombus-affected area, affecting the treatment effect. Summary of the invention

[0005] The purpose of the present invention is to provide a thrombolytic catheter device to solve the problem that the sealing effect between the existing occluding guide wire and the thrombolytic catheter is poor, thus affecting the treatment effect.

[0006] In order to solve the above technical problems, the present invention provides a thrombolytic catheter device, and the specific technical solution is as follows:

[0007] A thrombolytic catheter device comprises a tube body, a joint, a guide wire and a blocking piece; one end of the tube body is connected to the joint; the guide wire is placed in the tube body, one end of the guide wire is fixedly connected to the joint, and the other end is connected to the blocking piece;

[0008] Along the axial direction of the tube body, a plurality of sealing portions arranged at intervals are provided on the inner wall of the other end of the tube body;

[0009] A sealing plug is provided at one end of the sealing member connected to the guide wire. The sealing plug is placed in the other end of the tube body and is sealed and matched with at least one of the multiple sealing parts.

[0010] Furthermore, the sealing portion includes an annular protrusion arranged circumferentially on the inner wall of the tube body.

[0011] Furthermore, the thickness of the annular protrusion gradually decreases in the direction from the inner wall of the tube body to the inner wall of the annular protrusion.

[0012] Furthermore, the plurality of sealing portions are arranged at intervals, and the interval distance between two adjacent sealing portions is 0.5 mm-3 mm.

[0013] Furthermore, the tube body comprises a main body and a sealing tube connected to each other;

[0014] One end of the body is connected to the joint, and the other end is connected to the sealing tube;

[0015] The inner wall of the sealing tube is connected with the sealing part.

[0016] Furthermore, the hardness of the sealing portion is smaller than the hardness of the sealing tube.

[0017] Furthermore, the hardness of the sealing tube is greater than the hardness of the body.

[0018] Furthermore, the sealing tube is bonded or welded to the body.

[0019] Furthermore, the blocking member comprises an end head, a rod body and the sealing plug which are connected in sequence;

[0020] The sealing plug comprises a first truncated cone, a sealing column and a second truncated cone which are arranged in sequence;

[0021] The first truncated cone is connected to the rod body, the second truncated cone is connected to the guide wire, and the sealing column is in sealing cooperation with the sealing portion.

[0022] Furthermore, from one end of the tube body close to the blocking piece to the end away from the blocking piece, the tube body is sequentially provided with a first developing ring, a plurality of side hole groups, a second developing ring and a plurality of gauge rings; wherein the shapes of the gauge rings are different.

[0023] According to the thrombolytic catheter device provided by the present invention, a sealing portion is arranged on the inner wall of the tube body so that the sealing member and the tube body form a dynamic sealing structure. After the sealing member moves in one end of the tube body, or a certain area at one end of the tube body is deformed to a certain extent, the sealing portion can still cooperate with the sealing member in a sealing manner, thereby ensuring the sealing of the two, preventing the drug solution from directly flowing out of the central hole at the end of the catheter, and ensuring the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a thrombolytic catheter device provided in an embodiment of the present invention;

[0026] Figure 2 A cross-sectional schematic diagram of a thrombolytic catheter device provided by an embodiment of the present invention;

[0027] Figure 3 for Figure 2 A magnified view of part A;

[0028] Figure 4 A schematic diagram of the connection between the guide wire and the occluding member of the thrombolytic catheter device provided in an embodiment of the present invention.

[0029] icon:

[0030] 1-tube body; 11-sealing tube; 111-first stage; 12-body; 121-second stage; 13-first developing ring; 14-side hole; 15-second developing ring; 16-gauge ring;

[0031] 2- connector;

[0032] 3-guide wire; 31-hook;

[0033] 4-blocking member; 41-sealing plug; 411-first frustum; 412-sealing column; 413-second frustum; 42-rod body; 43-end;

[0034] 5- Sealing part;

[0035] 6-Connecting pipe. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Combined with Figure 1 As shown, this embodiment provides a thrombolytic catheter device, which is used for catheter thrombolysis. The thrombolytic catheter device of this embodiment includes functional components such as a tube body 1, a connector 2, a guide wire 3 and a blocking member 4.

[0040] One end of the tube body 1 of the present embodiment is connected to the connector 2. The connector 2 of the present embodiment is a Luer connector as shown in the figure, which is used to connect to an external device. The drug solution is injected into the Luer connector through the external device, and the drug solution enters the tube body 1 through the Luer connector. Since the Luer connector is a structure well known to those skilled in the art, the structure and working principle of the Luer connector are not described in this embodiment.

[0041] The guide wire 3 of this embodiment is placed in the tube body 1, and one end of the guide wire 3 is provided with a hook 31. The end of the guide wire 3 provided with the hook 31 is fixedly connected to the connector 2 of this embodiment, and the other end is connected to the blocking member 4. Figure 4 As shown, the guidewire 3 and the plugging member 4 of this embodiment can be integrally formed, and the two can be regarded as an integral plugging guidewire 3 structure. When the connector 2 and the guidewire 3 are connected together, the distal end of the assembly (one end of the connector 2) is fixed, and the tube body 1 and the plugging member 4 at the proximal end (the end away from the connector 2) can slide relative to each other, and the change in length is adjusted by the seal with the sealing portion 5 described below.

[0042] The tube body 1 of this embodiment is generally made of polymer material, and the plugging component 4 is generally made of metal or alloy material. During assembly, one end of the tube body 1 is connected to the joint 2, and the other end of the tube body 1 is connected to the plugging component 4. The specific connection method is to put one end of the tube body 1 on one end of the plugging component 4. Due to the material difference and assembly method of the plugging component 4 and the tube body 1, the technical problems in the background technology will arise, resulting in failure of the sealing of the two.

[0043] Combined with Figure 2 and 3 As shown, in order to solve the problem in the background technology, a plurality of sealing portions 5 arranged at intervals are provided on the inner wall of the other end of the tube body 1 in the axial direction of the tube body 1. As a preferred implementation manner of this embodiment, the spacing distance between two adjacent sealing portions is 0.5mm-3mm to ensure the sealing performance.

[0044] Correspondingly, the end of the blocking member 4 in this embodiment connected to the guide wire 3 is provided with a sealing plug 41 , which is placed in the other end of the tube body 1 and seals with at least one of the multiple sealing parts 5 .

[0045] Through the cooperation between the sealing portion 5 and the blocking piece 4, the blocking piece 4 and the tube body 1 form a dynamic sealing structure. After the blocking piece 4 moves in one end of the tube body 1, or after a certain area at one end of the tube body 1 is deformed to a certain extent, the sealing portion 5 can still cooperate with the blocking piece 4 in a sealing manner, thereby ensuring the sealing of the two, preventing the drug solution from directly flowing out of the central hole at the end of the catheter, and ensuring the treatment effect.

[0046] Specifically, the sealing portion 5 of the present embodiment includes an annular protrusion arranged circumferentially on the inner wall of the tube body 1, the outer wall of the annular protrusion is connected to the inner wall of the tube body 1, preferably integrally connected, the inner wall of the annular protrusion is provided with a first sealing surface, and the plugging member 4 is provided with a second sealing surface that seals with the first sealing surface. In the axial direction perpendicular to the tube body 1, the cross-sections of the first sealing surface and the second sealing surface of the present embodiment are both circular, so as to ensure that the surface seal of the sealing portion 5 and the plugging member 4 can cover the entire connection area between the two.

[0047] As a preferred implementation mode of this embodiment, the thickness of the annular protrusion of this embodiment gradually decreases in the direction from the inner wall of the tube body 1 to the inner wall of the annular protrusion. This structural design not only facilitates the deformation and recovery of the annular protrusion, ensuring a good sealing effect with the sealing piece 4, but also forms a guide surface on the side of the annular protrusion facing the sealing piece 4, which facilitates the sealing piece 4 to fall into the annular protrusion during the movement, thereby completing the sealing of the two.

[0048] Based on the above structure, the inventors found that the existing tube body 1 is integrally formed, and the hardness of each part of the tube body 1 is the same, while the end that cooperates with the plugging piece 4 requires a higher hardness. The existing tube body 1 cannot meet the requirement of a harder part. At the same time, this part cannot be formed independently, which easily increases the product failure rate.

[0049] Therefore, this embodiment improves the structure of the tube body 1 and combines the attached Figure 2 and 3 As shown, the tube body 1 of this embodiment includes a sealing tube 11 and a body 12 connected to each other, one end of the body 12 is connected to the joint 2, and the other end is connected to the sealing tube 11; the inner wall of the sealing tube 11 is provided with the above-mentioned sealing portion 5. The body 12 and the sealing tube 11 are made separately, and the hardness of the sealing tube 11 is greater than the hardness of the body 12 to prevent the sealing tube 11 and the sealing portion 5 from deforming; and, since the sealing tube 11 and the body 12 are separate structures, when the sealing tube 11 is unqualified, the sealing tube 11 is scrapped separately, ensuring the qualified rate of the product, and further ensuring the product quality.

[0050] As a preferred implementation mode of this embodiment, in order to realize the connection between the tube body 1 and the sealing tube 11 and ensure the stability after the two are combined, the inner wall of one end of the sealing tube 11 of this embodiment is provided with a first stage 111; the outer wall of one end of the main body 12 is provided with a second stage 121 adapted to the first stage 111; or, the outer wall of one end of the sealing tube 11 of this embodiment is provided with a first stage 111; the inner wall of one end of the main body 12 is provided with a second stage 121 adapted to the first stage 111.

[0051] Among them, the wall thickness of the first stage 111 is smaller than the wall thickness of the sealing tube 11 except the first stage 111, and the wall thickness of the second stage 121 is smaller than the wall thickness of the body 12 except the second stage 121; the first stage 111 and the second stage 121 are connected, and the connection method can be welding or bonding.

[0052] In order to ensure the sealing cooperation between the blocking member 4 and the sealing portion 5, the blocking member 4 needs to have a second sealing surface with a larger area. Therefore, in this embodiment, the structure of the blocking member 4 is optimized. Figure 4 As shown, the sealing member 4 of this embodiment includes a sealing plug 41, a rod body 42 and a circular end 43 which are connected in sequence.

[0053] Among them, the sealing plug 41 of this embodiment includes a first frustum of cone 411, a sealing column 412 and a second frustum of cone 413 which are arranged in sequence; the first frustum of cone 411 is connected to the rod body 42, the second frustum of cone 413 is connected to the guide wire 3, and the sealing column 412 is sealed with the sealing part 5. Since the sealing column 412 has a certain length and its shape can be adapted to the annular protrusion, the two have good sealing properties.

[0054] Based on the above structure, the inventors found that the existing thrombolytic catheter has no marking points or gauge rings 16 on the tube body 1, and it is impossible to know the length of the catheter penetrating into the human body without an X-ray machine. Therefore, this embodiment makes further improvements to the structure of the tube body 1.

[0055] Combined with Figure 1 As shown, along the end close to the blocking member 4 to the end away from the blocking member 4, the tube body 1 of this embodiment is sequentially provided with a first developing ring 13, a plurality of side hole groups, a second developing ring 15 and a plurality of gauge rings 16, and the drug solution injected into the tube body 1 by the Luer connector is discharged through the side hole 14 to provide drug treatment to the patient.

[0056] Specifically, the side hole 14 of this embodiment can be formed by laser cutting, and the total area of ​​the side hole 14 is 0.5 square millimeters to 1.0 square millimeters, preferably 0.7 square millimeters. The cross-sectional shape of the side hole 14 is a rectangular structure.

[0057] After the thrombolytic catheter is inserted into the human body, the first developing ring, the second developing ring and the side hole 14 are all located in the human body, and the gauge ring 16 is located outside the human body. The different shapes or patterns of the gauge ring 16 can indicate the distance of the first developing ring 13. In this way, the doctor can determine the length of the catheter entering the human body through the gauge ring 16 on the catheter that has not entered the human body, thus avoiding the use of an X-ray machine to determine the length of the catheter entering the human body, thereby preventing X-rays from harming the human body.

[0058] As a preferred implementation of this embodiment, in the axial distance from the second developing ring 15 to the first developing ring 13, the area of ​​a single side hole 14 gradually decreases to ensure uniform injection force of the thrombolytic agent in the catheter under pressure. Under a specific pressure, the injection height of the drug solution from each side hole 14 is consistent.

[0059] As a preferred implementation of this embodiment, the tube body 1 of this embodiment is connected to the Luer connector via a connecting tube 6. The hardness or structural strength of the connecting tube 6 is greater than the hardness or structural strength of the main body 12 of the tube body 1. The connecting tube 6 is used to prevent the connection between the catheter and the Luer connector from bending. The tube body 1 and the connecting tube 6 are injection molded into one piece.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thrombolytic catheter device, comprising a tube body, a connector, a guide wire and a blocking piece; one end of the tube body is connected to the connector; the guide wire is placed in the tube body, one end of the guide wire is fixedly connected to the connector, and the other end is connected to the blocking piece; It is characterized in that The tube body comprises a main body and a sealing tube connected to each other, and the hardness of the sealing tube is greater than the hardness of the main body; One end of the body is connected to the sealing tube, and the other end is connected to the joint; In the body and the sealing tube: the inner wall of one end of the sealing tube is provided with a first step, and the outer wall of one end of the body is provided with a second step matched with the first step; or the outer wall of one end of the sealing tube is provided with a first step; the inner wall of one end of the body is provided with a second step matched with the first step; wherein the wall thickness of the first step is smaller than the wall thickness of the sealing tube except the first step, the wall thickness of the second step is smaller than the wall thickness of the body except the second step, and the first step and the second step are connected; Along the axial direction of the tube body, a plurality of sealing parts arranged at intervals are provided on the inner wall of the sealing tube; the hardness of the sealing parts is less than the hardness of the sealing tube; A sealing plug is provided at one end of the sealing member connected to the guide wire. The sealing plug is placed in the other end of the tube body and is sealed and matched with at least one of the multiple sealing parts.

2. The thrombolytic catheter device according to claim 1, characterized in that: The sealing portion includes an annular protrusion arranged circumferentially on the inner wall of the tube body.

3. The thrombolytic catheter device according to claim 2, characterized in that: The thickness of the annular protrusion gradually decreases in the direction from the inner wall of the tube body to the inner wall of the annular protrusion.

4. The thrombolytic catheter device according to claim 1, characterized in that: The plurality of sealing portions are arranged at intervals, and the interval between two adjacent sealing portions is 0.5 mm to 3 mm.

5. The thrombolytic catheter device according to claim 1, characterized in that: The sealing tube is bonded or welded to the body.

6. The thrombolytic catheter device according to any one of claims 1 to 4, characterized in that: The plugging member comprises an end head, a rod body and the sealing plug which are connected in sequence; The sealing plug comprises a first truncated cone, a sealing column and a second truncated cone which are arranged in sequence; The first truncated cone is connected to the rod body, the second truncated cone is connected to the guide wire, and the sealing column is in sealing cooperation with the sealing portion.

7. The thrombolytic catheter device according to any one of claims 1 to 4, characterized in that: From one end of the tube body close to the blocking member to the other end away from the blocking member, the tube body is sequentially provided with a first developing ring, a plurality of side hole groups, a second developing ring and a plurality of gauge rings; Wherein, the shapes of the gauge rings are different.

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