Thrombolytic catheter

Abstract

The utility model discloses a kind of thrombolytic catheter, it includes catheter and catheter seat, the proximal end of catheter is connected with catheter seat, the inside of catheter is provided with axially extending infusion channel and guide wire channel, catheter from its distal end to its proximal end includes sequentially connected head section, thrombolytic segment and main body section.Thrombolytic segment's lateral wall is provided with the permeation hole being communicated with infusion channel, the lateral wall of main body section is provided with the side hole being communicated with guide wire channel, the end of head section being away from thrombolytic segment is provided with the outlet being communicated with guide wire channel, side hole, outlet and the guide wire channel between side hole and outlet constitute temporary blood flow channel.The thrombolytic catheter disclosed in the utility model, by setting side hole, outlet and the guide wire channel between side hole and outlet constitute temporary blood flow channel, so that in the process of thrombolytic operation, blood can normally flow, so that the situation that tissue or organ is caused damage due to tissue or organ long-term ischemia caused by blood flow not being unobstructed can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a thrombolytic catheter. Background Technology

[0002] When a blood clot blocks a diseased blood vessel, it causes ischemia in the tissue or organ, leading to damage. Thrombolytic catheters deliver thrombolytic drugs to the affected area to dissolve the clot and improve blood flow. However, current thrombolytic catheters can block the blood vessel during the drug delivery process, causing distal tissues or organs to remain ischemic during prolonged thrombolysis procedures, potentially resulting in tissue or organ damage. Utility Model Content

[0003] In view of this, the present invention proposes a thrombolytic catheter.

[0004] The thrombolytic catheter proposed in this utility model includes a catheter and a catheter seat. The proximal end of the catheter is connected to the catheter seat. The catheter has an axially extending infusion channel and a guidewire channel inside. The catheter includes a head section, a thrombolytic section and a main body section connected in sequence from its distal end to its proximal end.

[0005] The sidewall of the thrombolytic segment is provided with an infusion hole communicating with the infusion channel, the sidewall of the main body segment is provided with a side hole communicating with the guidewire channel, and the end of the head segment away from the thrombolytic segment is provided with an outlet communicating with the guidewire channel. The side hole, the outlet, and the guidewire channel between the side hole and the outlet constitute a temporary blood flow channel.

[0006] As can be seen from the above technical solution, the thrombolytic catheter proposed in this utility model has a side hole on the side wall of the main body of the catheter that communicates with the guidewire channel. The side hole, the outlet, and the guidewire channel between the side hole and the outlet constitute a temporary blood flow channel, allowing blood to flow normally during the thrombolytic procedure. This avoids damage to tissues or organs caused by prolonged ischemia due to blocked blood flow. Moreover, by setting the catheter with a dual-channel structure of infusion channel and guidewire channel, the permeation hole communicates with the infusion channel, and the side hole communicates with the guidewire channel. The two do not interfere with each other, ensuring that the side hole can always maintain communication with the guidewire channel.

[0007] Furthermore, the permeation pores are evenly distributed circumferentially along the thrombolytic section.

[0008] Furthermore, the infusion channel includes a first infusion channel segment and a second infusion channel segment. The first infusion channel segment is located inside the main body segment and is spaced apart from the guidewire channel. The second infusion channel segment is located inside the thrombolytic segment and surrounds the guidewire channel. The permeation hole communicates with the second infusion channel segment.

[0009] Furthermore, the side hole is inclined relative to the centerline of the guidewire channel, and the distance between the side hole and the centerline of the guidewire channel gradually increases from the distal end of the catheter towards the proximal end of the catheter; or, the side hole is perpendicular to the centerline of the guidewire channel.

[0010] Furthermore, the diameter of the side hole is configured to be no greater than the outer diameter of the guidewire.

[0011] Furthermore, the length of the head segment is greater than or equal to 10 mm;

[0012] Furthermore, the outer diameter of the thrombolytic segment is larger than the outer diameter of the head segment and the outer diameter of the main body segment.

[0013] Furthermore, the number of side holes is at least two, and the at least two side holes are distributed at intervals along the axial direction of the conduit to form a side hole group, and imaging markers are provided at the side holes at both ends of the side hole group.

[0014] Furthermore, the catheter hub includes a Y-type connector, which is provided with an infusion port and a guidewire port. The infusion port is connected to the infusion channel, and the guidewire port is connected to the guidewire channel.

[0015] Furthermore, the catheter also includes a thiopancreatography (hs) tube segment, one end of which is connected to the catheter seat, and the other end of which is connected to the main body segment. The catheter seat is provided with an infusion port that communicates with the infusion channel, and the connection between the main body segment and the thiopancreatography (hs) tube segment is provided with a guidewire port that communicates with the guidewire channel.

[0016] Furthermore, the thrombolytic catheter also includes a strain relief sleeve, which is fitted onto the connection between the catheter and the catheter seat, as well as a portion of the catheter. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the structure of a thrombolytic catheter proposed in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the thrombolytic catheter proposed in another embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a thrombolytic catheter in a blood vessel according to an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional schematic diagram of the thrombolytic segment of the catheter according to an embodiment of the present invention;

[0022] Figure 5 This is a cross-sectional schematic diagram of the main body segment of the catheter according to an embodiment of the present invention;

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Thrombolytic catheter; 200. Thrombosis catheter; 300. Blood vessel;

[0025] 10. Catheter; 20. Catheter hub; 30. Strain release sleeve;

[0026] 11. Head section; 12. Thrombolysis section; 13. Main body section; 14. Substrate section;

[0027] 21. Y-type connector;

[0028] 101. Infusion channel; 102. Guidewire channel; 131. Side hole; 133. Imaging marker; 111. Outlet;

[0029] 1011, First infusion channel segment; 1012, Second infusion channel segment. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0031] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. The component designations used herein, such as "first," "second," etc., are merely for distinguishing the described objects and have no sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages). Directional terms used in this application, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," "side," etc., are merely for reference to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of this application, and does not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this application.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising," "may include," "include," or "may contain" used in this application indicate the existence of the corresponding disclosed functions, operations, elements, etc., and do not limit other one or more additional functions, operations, elements, etc.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0034] like Figures 1 to 4As shown, an embodiment of this utility model provides a thrombolytic catheter 100, which includes a catheter 10 and a catheter seat 20. The proximal end of the catheter 10 is connected to the catheter seat 20. The catheter 10 has an axially extending infusion channel 101 and a guidewire channel 102 inside. The catheter 10 includes a head section 11, a thrombolytic section 12, and a main body section 13 connected in sequence from its distal end to its proximal end. The side wall of the thrombolytic section 12 is provided with an infiltration hole 121 communicating with the infusion channel 101. The side wall of the main body section 13 is provided with a side hole 131 communicating with the guidewire channel 102. The end of the head section 11 away from the thrombolytic section 12 is provided with an outlet 111 communicating with the guidewire channel 102. The side hole 131, the outlet 111, and the guidewire channel 102 between the side hole 131 and the outlet 111 constitute a temporary blood flow channel.

[0035] In this embodiment, when using the thrombolytic catheter 100, the operator guides the catheter 100 along the guidewire to the blood vessel 300 blocked by the thrombus 200. Thrombolytic medication is then injected into the catheter 100 through the infusion port 211. The medication flows through the infusion channel 101 to the thrombolytic section 12 of the catheter 10 and is sprayed onto the thrombus 200 through the permeation hole 121 in the thrombolytic section 12, achieving a thrombolytic effect. Simultaneously, blood enters the guidewire channel 102 between the side hole 131 and the outlet 111 in the main body section 13, and then flows out from the outlet 111 in the head section 11, thus forming a temporary blood flow channel. This allows for normal blood flow and prevents prolonged ischemia of tissues or organs due to blocked blood flow during the thrombolytic procedure, which could cause damage. When the thrombus 200 is long, the position of the thrombolytic catheter 100 can be adjusted along the guidewire to dissolve the thrombus 200 one by one.

[0036] The thrombolytic catheter 100 proposed in this embodiment has a side hole 131 on the side wall of the main body section 13 of the catheter 10, which communicates with the guidewire channel 102. The side hole 131, the outlet 111, and the guidewire channel 102 between the side hole 131 and the outlet 111 form a temporary blood flow channel, allowing blood to flow normally during the thrombolytic procedure. This avoids damage to tissues or organs caused by prolonged ischemia due to blocked blood flow. Moreover, by setting the catheter 10 to have a dual-channel structure with an infusion channel 101 and a guidewire channel 102, the permeation hole 121 communicates with the infusion channel 101, and the side hole 131 communicates with the guidewire channel 102. The two do not affect each other, so that the side hole 131 can always maintain communication with the guidewire channel 102.

[0037] like Figure 3As shown, in some embodiments, the side hole 131 is inclined relative to the centerline of the guidewire channel 102, and the distance between the side hole 131 and the centerline of the guidewire channel 102 gradually increases from the distal end of the catheter 10 towards the proximal end of the catheter 10. In this embodiment, during the process of the guidewire passing through the guidewire channel 102 through the thrombolysis catheter 100, the guidewire is not stuck at the side hole 131 position, allowing the guidewire to pass smoothly through the thrombolysis catheter 100.

[0038] It should be noted that the side hole 131 is not limited to being inclined relative to the center line of the guide wire channel 102. For example, in some embodiments, the side hole 131 may also be configured to be perpendicular to the center line of the guide wire channel 102. The specific configuration can be determined according to actual design requirements.

[0039] In some embodiments, the diameter of the side hole 131 is configured to be no larger than the outer diameter of the guidewire. In this embodiment, the guidewire will not exit through the side hole 131 during the process of passing the guidewire through the guidewire channel 102 through the thrombolysis catheter 100, allowing the guidewire to pass smoothly through the thrombolysis catheter 100.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments, the number of side holes 131 is at least two, and the at least two side holes 131 are distributed at intervals along the axial direction of the catheter 10 to form a side hole group. A contrast indicator 132 is provided at the side holes 131 at both ends of the side hole group. In this embodiment, the position of the side holes 131 in the body can be observed through the contrast indicator 132, and the blood flow can be controlled by temporarily closing part of the side holes 131 with a guidewire.

[0041] like Figure 1 and Figure 2 As shown, in some embodiments, the number of side holes 131 is three. Of course, the number of side holes 131 is not limited to three. For example, in other embodiments, the number of side holes 131 can also be set to four, five or more, depending on the actual usage requirements.

[0042] In some embodiments, the length of the proximal segment 11 is greater than or equal to 10 mm. In this embodiment, when the thrombolytic segment 12 is located at the thrombus 200, the proximal segment 11 can completely protrude from the thrombus 200, allowing the constructed temporary blood flow channel to function normally. Understandably, if the length of the proximal segment 11 is too short, when the thrombolytic segment 12 is located at the thrombus 200, the proximal segment 11 will also be embedded within the thrombus 200, and the constructed temporary blood flow channel will still be obstructed.

[0043] like Figure 1 and Figure 2As shown, in some embodiments, the outer diameter of the thrombolytic segment 12 is larger than the outer diameter of the head segment 11 and the outer diameter of the main body segment 13. This embodiment allows for better contact between the thrombolytic segment 12 and the thrombus 200, thereby achieving a better thrombolytic effect.

[0044] like Figure 4 As shown, in some embodiments, the permeation holes 121 are uniformly distributed circumferentially along the thrombolysis section 12. In this embodiment, during the thrombolysis procedure, the thrombolytic drug solution can be evenly sprayed onto the surrounding thrombus 200 through the uniformly distributed permeation holes 121, thereby achieving a better thrombolytic effect.

[0045] like Figure 3 and Figure 4 As shown, in some embodiments, the infusion channel 101 includes a first infusion channel segment 1011 and a second infusion channel segment 1012. The first infusion channel segment 1011 is located inside the main body segment 13 and is spaced apart from the guidewire channel 102. The second infusion channel segment 1012 is located inside the thrombolysis segment 12 and is arranged around the guidewire channel 102. The permeation hole 121 is connected to the second infusion channel segment 1012.

[0046] In some embodiments, the cross-sectional profile of the second infusion channel segment 1012 is coaxially arranged with the cross-sectional profile of the guidewire channel 102.

[0047] like Figure 3 and Figure 5 As shown, in some embodiments, the cross-sectional profile of the main body segment 13 of the catheter 10 is circular, the cross-sectional profile of the guidewire channel 102 is circular, and the cross-sectional profile of the first infusion channel segment 1011 is elliptical. In this embodiment, within the limited space of the main body segment 13 of the catheter 10, the aperture of the first infusion channel 101 can be made as large as possible, thereby achieving a higher infusion rate. It should be noted that the cross-sectional profile of the first infusion channel 101 is not limited to an elliptical shape; it can also be crescent-shaped or other shapes, as long as the aperture of the first infusion channel 101 can be made as large as possible to achieve a higher infusion rate.

[0048] like Figure 1 As shown, in some embodiments, the catheter hub 20 includes a Y-type connector 21, which is provided with an infusion port 211 and a guidewire port 212. The infusion port 211 is connected to the infusion channel 101, and the guidewire port 212 is connected to the guidewire channel 102.

[0049] like Figure 2As shown, in some embodiments, the catheter 10 further includes a hyaluronic acid tube segment 14, one end of which is connected to the catheter seat 20 and the other end of which is connected to the main body segment 13. The catheter seat 20 is provided with an infusion port 211 that communicates with the infusion channel 101, and the connection between the main body segment 13 and the hyaluronic acid tube segment 14 is provided with a guidewire port 212 that communicates with the guidewire channel 102.

[0050] like Figure 1 and Figure 2 As shown, in some embodiments, the thrombolytic catheter 100 further includes a strain release sleeve 30, which is sleeved at the connection between the catheter 10 and the catheter seat 20 and a portion of the catheter 10.

[0051] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent modifications or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A thrombolytic catheter, characterized in that, It includes a catheter and a catheter seat, the proximal end of the catheter is connected to the catheter seat, the interior of the catheter is provided with an axially extending infusion channel and a guidewire channel, and the catheter includes a head section, a thrombolytic section and a body section connected in sequence from its distal end to its proximal end; The sidewall of the thrombolytic segment is provided with an infusion hole communicating with the infusion channel, the sidewall of the main body segment is provided with a side hole communicating with the guidewire channel, and the end of the head segment away from the thrombolytic segment is provided with an outlet communicating with the guidewire channel. The side hole, the outlet, and the guidewire channel between the side hole and the outlet constitute a temporary blood flow channel.

2. The thrombolytic catheter as described in claim 1, characterized in that, The permeation pores are evenly distributed circumferentially along the thrombolytic section.

3. The thrombolytic catheter as described in claim 1, characterized in that, The infusion channel includes: The first infusion channel segment is located inside the main body segment and is spaced apart from the guidewire channel; The second infusion channel section is located inside the thrombolytic section and surrounds the guidewire channel, and the permeation hole is connected to the second infusion channel section.

4. The thrombolytic catheter as described in claim 1, characterized in that, The side hole is inclined relative to the centerline of the guidewire channel, and the distance between the side hole and the centerline of the guidewire channel gradually increases from the distal end of the catheter towards the proximal end; or, The side hole is perpendicular to the center line of the guide wire channel.

5. The thrombolytic catheter as described in claim 1, characterized in that, The diameter of the side hole is configured to be no greater than the outer diameter of the guidewire.

6. The thrombolytic catheter as described in claim 1, characterized in that, At least one of the following conditions must be met: The length of the head segment is greater than or equal to 10 mm; The outer diameter of the thrombolytic segment is greater than the outer diameter of the head segment and the outer diameter of the main body segment.

7. The thrombolytic catheter as described in claim 1, characterized in that, The number of side holes is at least two, and the at least two side holes are distributed at intervals along the axial direction of the conduit to form a side hole group. A radiographic indicator is provided at the side holes located at both ends of the side hole group.

8. The thrombolytic catheter as described in claim 1, characterized in that, The catheter hub includes a Y-type connector, which is provided with an infusion port and a guidewire port. The infusion port is connected to the infusion channel, and the guidewire port is connected to the guidewire channel.

9. The thrombolytic catheter as described in claim 1, characterized in that, The catheter also includes a thiopancreatography (hw) tube segment, one end of which is connected to the catheter seat, and the other end of which is connected to the main body segment. The catheter seat is provided with an infusion port that communicates with the infusion channel, and the connection between the main body segment and the thiopancreatography (hw) tube segment is provided with a guidewire port that communicates with the guidewire channel.

10. The thrombolytic catheter as described in claim 1, characterized in that, The thrombolytic catheter also includes a strain relief sleeve, which is fitted onto the connection between the catheter and the catheter seat, as well as a portion of the catheter.

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