Intravascular catheter supporting device and conveying system

Abstract

The utility model relates to an intravascular catheter supporting device which comprises a supporting body formed by weaving a plurality of metal wires. The supporting body is provided with rhombic meshes and comprises a supporting part and a telecentric part, one end of the supporting part is connected with one end of the telecentric part, and a connecting ring is arranged at the other end of the telecentric part; the end, close to the connecting ring, of the telecentric part is a guide section, a metal wire of the guide section is in a non-woven state, and the length of the guide section is 5-10 mm; one end of the pushing wire is fixedly connected with the connecting ring; wherein at least one metal wire in the plurality of metal wires is a developing wire. The intravascular catheter supporting device disclosed by the embodiment of the utility model can be arranged at the position where the middle catheter is possibly bent in advance, so that the middle catheter turns, the bending angle of the middle catheter is reduced, support is provided for establishment of a channel, and establishment of the channel is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary devices for endovascular catheters, specifically to an endovascular catheter support device and delivery system. Background Technology

[0002] Currently, endovascular interventional therapy typically requires establishing a access route first, followed by the delivery of devices through that route. For example, treatment of intracranial aneurysms usually requires a long sheath, into which an intermediate catheter is inserted, followed by a microcatheter, and finally, a stent or spring-loaded embolization device is delivered via the microcatheter. Alternatively, a microcatheter can be directly inserted into a long sheath and delivered via the microcatheter.

[0003] Long sheaths are typically quite rigid. The distal end of the sheath can reach the C1 segment of the internal carotid artery, providing good support. However, in complex arcuate vessels, such as type III arcuate arteries, the sheath may only remain within the arcuate segment of the aorta. A poorly supporting intermediate catheter may create significant bends in the arcuate segment of the aorta, leading to access failure. Even if access is successfully established, such as... Figure 1 As shown, during stent delivery, the delivered stent will create significant pushing resistance in the arch segment (bend), causing stent delivery failure. Utility Model Content

[0004] This invention provides an intravascular catheter support device and delivery system to solve the technical problem of poor support of existing intermediate catheters, which makes it difficult to establish access.

[0005] This utility model discloses an intravascular catheter support device, which includes a support body and a pusher wire. The support body is woven from multiple metal wires and has a diamond-shaped mesh. The support body includes a support section and a distal section. One end of the support section is connected to one end of the distal section, and the other end of the distal section is provided with a connecting ring. The end of the distal section near the connecting ring is a guide section. The metal wire in the guide section is in a non-woven state, and the length of the guide section is 5mm to 10mm. One end of the pusher wire is fixedly connected to the connecting ring. Among the multiple metal wires, at least one is a contrast-enhancing wire.

[0006] Furthermore, the number of metal wires woven into the support is 8 to 48; the wires of the metal wires

[0007] The diameter is 0.02mm to 0.1mm.

[0008] Furthermore, at least two of the multiple metal wires are arranged opposite each other.

[0009] Furthermore, the developing wire is made of any one of platinum-tungsten alloy, platinum-iridium alloy, or tantalum alloy.

[0010] Further, the diagonal line length of the rhombic mesh hole located in the far center part is 0.5mm-3mm.

[0011] Further, the diagonal line length of the rhombic mesh hole located in the far center part is 0.5mm-3mm.

[0012] Further, the support body further comprises a near center part, one end of the near center part is connected with the end of the support part far from the far center part, and the end of the near center part far from the support part is in the shape of a necking or flaring.

[0013] Further, the end of the near center part far from the support part is provided with a developing ring.

[0014] Further, when the metal wire of the end of the near center part far from the support part is in a non-woven state, the metal wire of the end of the near center part far from the support part is divided into multiple parts, the metal wire of each part is bound and fixed by a developing ring, and the multiple developing rings are arranged in a circle with a diameter greater than or equal to the diameter of the support part.

[0015] The utility model discloses still disclose a conveying system, including the endovascular catheter support device of any one of the above.

[0016] The endovascular catheter support device and the conveying system provided by the utility model can realize the following technical effects:

[0017] The endovascular catheter support device disclosed in the embodiment can be arranged in the position where the intermediate catheter is likely to be bent, so that the intermediate catheter is turned, the bending angle is reduced, support for the establishment of the passage is provided, and the establishment of the passage is facilitated. Meanwhile, the endovascular catheter support device also has rhombic mesh holes for facilitating the circulation of blood. The force conduction can also be guaranteed under the premise that the long sheath is not applicable, and only the intermediate catheter can guarantee the force conduction.

[0018] The foregoing general description and the following description are only exemplary and explanatory, and are not used to limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] One or more embodiments are exemplarily illustrated by corresponding drawings, and the exemplary illustrations and drawings do not constitute limitation on the embodiments, and elements with the same reference numerals in the drawings are regarded as similar elements, and wherein:

[0020] Figure 1 is a background technology diagram;

[0021] Figure 2 is a schematic diagram of one embodiment of the endovascular catheter support device of the utility model;

[0022] Figure 3is an embodiment of a distal end of an intravascular catheter support device of the utility model

[0023] schematic view

[0024] Figure 4 is a schematic view of an embodiment of a delivery system of the utility model

[0025] Figure 5 is a schematic view of an embodiment of a support body of an intravascular catheter support device of the utility model Figure 1 ;

[0026] Figure 6 is a schematic view of an embodiment of a support body of an intravascular catheter support device of the utility model Figure 2 ;

[0027] Figure 7 is a schematic view of an embodiment of a support body of an intravascular catheter support device of the utility model Figure 3 ;

[0028] Figure 8 is a schematic view of an embodiment of a support body of an intravascular catheter support device of the utility model Figure 4 .

[0029] Reference signs

[0030] 1, support body;11, metal wire;12, support part;13, distal end;131, guide section;15, proximal end;2, push wire;31, connecting ring;32, developing ring;41, intermediate catheter;42, long sheath. DETAILED DESCRIPTION

[0031] In order to be able to more detailedly understand the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the attached drawings are only used for reference and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.

[0032] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0034] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0035] Unless otherwise specified, the term "a plurality of" means two or more, and the term "a plurality of groups" means two or more groups.

[0036] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0037] In the present application, the distal end refers to the end away from the operator during surgery, and the proximal end refers to the end close to the operator during surgery.

[0038] First embodiment

[0039] The intravascular catheter support device mentioned in the present embodiment, such as Figure 2As shown, the intravascular catheter support device comprises a support body 1 and a pushing wire 2. The support body 1 is formed by crossing and weaving a plurality of metal wires 11. Optionally, 8-48 metal wires 11 are crossed and woven to form the support body 1. The diameter of each metal wire 11 woven to form the support body 1 is 0.02-0.1 mm. The support body 1 comprises a support part 12 and a telecentric part 13. The support part 12 has a tube network structure. Due to the tube network structure of the support part 12, the mesh holes of the support part 12 are rhombic. The diagonal length of the rhombic mesh holes of the support part 12 is 0.5-3 mm. By limiting the size of the rhombic mesh holes, the hindrance of the intravascular catheter support device of the present embodiment to blood circulation can be reduced. The diameter of one end of the telecentric part 13 is larger than that of the other end, i.e., the telecentric part 13 has a constricted structure. One end of the support part 12 is connected to the end of the telecentric part 13 with a larger diameter. Optionally, the adjacent two metal wires 11 are connected to each other at the end of the support part 12 away from the telecentric part 13. The end of the telecentric part 13 with a smaller diameter is provided with a connecting ring 31, and the telecentric part 13 is sealed by the connecting ring 31. Meanwhile, one end of the pushing wire 2 is also fixedly connected to the connecting ring 31. Such arrangement

[0040] The intravascular catheter support device is conducive to recovery.

[0041] In the present embodiment, at least one of the plurality of metal wires 11 is a developing wire, which is conducive to developing the intravascular catheter support device of the present embodiment and facilitating the surgeon to observe the position thereof during the operation. Optionally, the developing wire is made of any one of platinum-tungsten alloy, platinum-iridium alloy, and tantalum alloy. Of course, the number of the developing wires can also be at least two. In the support body 1 formed by crossing and weaving the plurality of metal wires 11, if the number of the developing wires is two, the two developing wires are located on the two sides of the axis of the support body 1 and oppositely arranged. If the number of the developing wires is more than two, the plurality of developing wires are uniformly arranged around the axis of the support body 1. Of course, the material of the connecting ring 31 is the same as that of the developing wire.

[0042] In the present embodiment, the telecentric part 13 has a plurality of technical solutions, which are as follows:

[0043] Optionally, as shown in Figure 2 The mesh holes on the telecentric part 13 are all rhombic. The diagonal length of the rhombic mesh holes of the telecentric part 13 is 0.5-3 mm. By limiting the size of the rhombic mesh holes, the hindrance of the intravascular catheter support device of the present embodiment to blood circulation can be reduced, and the intermediate catheter 41 can be blocked and turned.

[0044] Optionally, as shown in Figure 3As shown, the distal portion 13 near the support portion 12 is in a braided state, forming a diamond-shaped mesh; the distal portion 13 near the connecting ring 31 is in a non-braided state, and the non-braided portion is the guide section 131, the length L of which is 5mm to 10mm. The diagonal length of the diamond-shaped mesh of the distal portion 13 is 0.5mm to 3mm. By limiting the size of the diamond-shaped mesh, the obstruction of blood flow by the intravascular catheter support device of this embodiment can be reduced, and the intermediate catheter 41 can be blocked and redirected.

[0045] Either of the two optional technical solutions mentioned above can be chosen.

[0046] An exemplary embodiment of the application scenario:

[0047] like Figures 2 to 4 As shown, the long sheath 42 is first placed inside the patient's blood vessel. The endovascular catheter support device of this embodiment is then placed inside the long sheath 42, and the endovascular catheter support device is in a compressed state. The distal end of the long sheath 42 is moved to a location where the intermediate catheter 41 might bend. The pusher wire 2 is pushed distally, driving the support body 1 into the blood vessel. The support body 1 is released from the constraint of the long sheath 42 and expands at the location where the intermediate catheter 41 might bend. The support portion 12 of the expanded support body 1 abuts against the inner wall of the blood vessel. The support body 1 has diamond-shaped mesh holes to facilitate blood flow. Next, the intermediate catheter 41 is placed inside the long sheath 42, and the distal end of the intermediate catheter 41 is pushed distally. If the endovascular catheter support device is not placed at the location where the intermediate catheter 41 might bend, the intermediate catheter 41 may have…

[0048] like Figure 1 The bending risk shown is detrimental to the establishment of a pathway. For example... Figure 4 As shown, when the intravascular catheter support device is placed at a location where the intermediate catheter 41 may bend, the intermediate catheter 41 will change direction due to the action of the intravascular catheter support device, and its bending curvature will not affect the establishment of the access.

[0049] After the surgery is completed, the intermediate catheter 41 is first withdrawn, and then the intravascular catheter support device is retrieved into the long sheath 42 through the cooperation of the long sheath 42 and the intravascular catheter support device.

[0050] Of course, there is another case that when the long sheath 42 cannot reach the position of the intravascular catheter support device, the intermediate catheter 41 is first withdrawn, and then a new intermediate catheter 41 is sleeved on the push wire 2 of the intravascular catheter support device, so that the intermediate catheter 41 is between the long sheath 42 and the intravascular catheter support device, and the intravascular catheter support device is retracted into the intermediate catheter 41 through the cooperation of the new intermediate catheter 41 and the intravascular catheter support device.

[0051] Compared with the prior art, the intravascular catheter support device disclosed in the embodiment can be arranged in advance at a position where the intermediate catheter 41 is likely to be bent, so that the intermediate catheter 41 is turned and the bending angle thereof is reduced, and support is provided for the establishment of the passage, thereby facilitating the establishment of the passage. Meanwhile, the intravascular catheter support device also has a rhombic mesh for facilitating the flow of blood. It can also ensure that the force can be transmitted by using only the intermediate catheter 41 without using the long sheath 42.

[0052] Second embodiment

[0053] The embodiment also proposes an intravascular catheter support device. The second embodiment is a further improvement based on the first embodiment, and the main improvement is that the support body 1 further comprises a proximal part 15, one end of the proximal part 15 being connected to the end of the support part 12 away from the distal part 13, and the specific arrangement is as follows:

[0054] Optionally, as shown in Figure 5 , the end of the proximal part 15 away from the support part 12 is in the shape of a necking, and the diameter of the end of the proximal part 15 close to the support part 12 is greater than the diameter of the end of the proximal part 15 away from the support part 12. At the end of the proximal part 15 away from the support part 12, the two adjacent metal wires 11 are connected to each other.

[0055] Optionally, as shown in Figure 6 , the diameter of the end of the proximal part 15 close to the support part 12 is greater than the diameter of the end of the proximal part 15 away from the support part 12. The end of the proximal part 15 away from the support part 12 is provided with a developing ring 32, and the developing ring 32 is used to seal the proximal part 15. The rhombic mesh on the proximal part 15 not only facilitates the flow of blood, but also can be developed through the developing ring 32. Of course, the material of the developing ring 32 is the same as that of the developing wire.

[0056] Optionally, as shown in Figure 7 , the end of the proximal part 15 away from the support part 12 is in the shape of a flaring, and the diameter of the end of the proximal part 15 close to the support part 12 is less than the diameter of the end of the proximal part 15 away from the support part 12. At the end of the proximal part 15 away from the support part 12, the two adjacent metal wires 11 are connected to each other. Such an arrangement can further increase the support force of the support body 1 on the blood vessel.

[0057] Optionally, as shown in the figure, the end of the proximal portion 15 away from the support portion 12 is flared. When the imaging of the end of the proximal portion 15 away from the support portion 12 is in a non-woven state, the metal wire 11 in the non-woven state at the end of the proximal portion 15 away from the support portion 12 is divided into multiple parts. Multiple imaging rings 32 are used to bind and fix multiple metal wires 11 in each part, that is, one imaging ring 32 is used to bind and fix multiple metal wires 11 in one part. The diameter of the circle formed by the multiple imaging rings 32 is greater than or equal to the diameter of the support portion 12. This setting can not only further increase the support of the support body 1 for the blood vessel, but also facilitate the surgeon to observe the position of the end of the support body 1.

[0058] You may choose any one of the four technical solutions mentioned above.

[0059] Third Embodiment

[0060] The conveying system mentioned in this embodiment, such as Figure 4 As shown, the delivery system includes an intravascular catheter support device and a long sheath 42 as disclosed in the first or second embodiment, with the intravascular catheter support device disposed within the long sheath 42.

[0061] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An intravascular catheter support device, characterized in that, include: The support body (1) is woven from multiple metal wires (11); the support body (1) has a diamond-shaped mesh; the support body (1) includes a support part (12) and a distal part (13); one end of the support part (12) is connected to one end of the distal part (13); the other end of the distal part (13) is provided with a connecting ring (31); the end of the distal part (13) near the connecting ring (31) is a guide section (131); the metal wires (11) of the guide section (131) are in a non-woven state; the length of the guide section (131) is 5mm to 10mm. The push wire (2) is fixedly connected at one end to the connecting ring (31); Among them, at least one of the multiple metal wires (11) is a developing wire.

2. The intravascular catheter support device according to claim 1, characterized in that, The number of metal wires (11) woven into the support (1) is 8 to 48. The diameter of the metal wire (11) is 0.02 mm to 0.1 mm.

3. The intravascular catheter support device according to claim 1, characterized in that, At least two developing wires are arranged opposite each other in the multiple metal wires (11).

4. The intravascular catheter support device according to claim 1, characterized in that, The developing wire is made of any one of platinum-tungsten alloy, platinum-iridium alloy, or tantalum alloy.

5. The intravascular catheter support device according to any one of claims 1 to 4, characterized in that, The diagonal length of the rhomboid mesh located in the distal part (13) is 0.5mm to 3mm.

6. The intravascular catheter support device according to any one of claims 1 to 4, characterized in that, The diagonal length of the diamond-shaped mesh located in the support part (12) is 0.5mm to 3mm.

7. The intravascular catheter support device according to claim 1, characterized in that, The support (1) also includes: The proximal portion (15) is connected at one end to the end of the support portion (12) away from the distal portion (13); The end of the proximal portion (15) away from the support portion (12) is either constricted or flared.

8. The intravascular catheter support device according to claim 7, characterized in that, A radiopaque ring (32) is provided at the end of the proximal portion (15) away from the support portion (12).

9. The intravascular catheter support device according to claim 7, characterized in that, When the metal wire (11) at the end of the proximal part (15) away from the support part (12) is in a non-woven state, the metal wire (11) at the end of the proximal part (15) away from the support part (12) is divided into multiple parts, and the metal wire (11) of each part is bound and fixed by a developing ring (32). The diameter of the circle formed by the multiple developing rings (32) is greater than or equal to the diameter of the support part (12).

10. A conveying system, characterized in that, Includes the intravascular catheter support device as described in any one of claims 1 to 9.

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