Intracranial extendable angiographic catheter and interventional system

Abstract

The utility model discloses an intracranial extendable angiographic catheter and an interventional system, and relates to the field of interventional instruments. The intracranial extendable angiographic catheter comprises an angiographic catheter and an extension catheter, wherein an angiographic channel is arranged in the angiographic catheter; the extension catheter sleeves the periphery of the angiographic catheter, and the angiographic catheter is configured to be slidably connected to the extension catheter; an arc-shaped contraction part is arranged on the far end side of the extension catheter and is of a flexible structure. Under the action of external force, the angiographic catheter can move from the near-end side of the extension catheter to the far-end side of the extension catheter, so that the angiographic catheter enters and passes through the arc-shaped contraction part, and the arc-shaped contraction part is attached to and wraps the extension catheter, so that the restraining force of matching between the angiographic catheter and the extension catheter is enhanced, and stable combination is promoted; therefore, the angiographic catheter can obtain a stable and reliable injection position, and the actual angiographic effect is improved; and the arranged arc-shaped contraction part is beneficial to preventing the extension catheter from damaging the inner wall of the blood vessel, so that the pushing safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of interventional instruments, in particular to an intracranial extendable angiography catheter and an interventional system. Background Art

[0002] The femoral artery is the most commonly used route for cerebrovascular interventional diagnosis and treatment. When the femoral artery is not suitable for puncture, the radial artery or brachial artery can also be selected as the puncture point based on experience. Compared with the femoral artery, radial artery puncture can reduce puncture site bleeding complications after coronary artery interventional diagnosis / treatment. For interventional treatment of some patients, such as type III aortic arch, bovine aortic arch, elongated and widened aortic arch, tricky angles at the origin of the artery, arterial tortuosity, local plaque formation, etc., it is often difficult to implement the angiography tube, which greatly reduces the controllability of the guidewire catheter; in this case, the conventional angiography catheter or support catheter, or even the guidewire, cannot be placed in the target blood vessel. At present, when using conventional angiography catheters or support catheters for angiography via the femoral artery, it is difficult and tricky for the catheter to superselectively enter the cerebral artery, which is easy to cause damage to the inner wall of the blood vessel, and it is difficult to obtain a stable and favorable injection position, which reduces the actual angiography effect. Utility Model Content

[0003] The technical problem that the utility model is to solve or at least partially solve is that in the related art, when a conventional angiography catheter or a support catheter is used for angiography via the femoral artery, it is difficult and thorny for the catheter to superselectively enter the cerebral artery, and it is difficult to obtain a stable and favorable injection position, which reduces the actual angiography effect.

[0004] In a first aspect, the utility model provides an intracranial extendable angiography catheter, comprising:

[0005] An angiography catheter is provided with an angiography channel therein;

[0006] An extension catheter is sleeved on the outer circumference of the angiography catheter, and the angiography catheter is configured to be slidably connected to the extension catheter;

[0007] Among them, an arc-shaped contraction part is provided on the distal side of the extension catheter, and the arc-shaped contraction part is a flexible structure. Under the action of external force, the angiography catheter moves from the proximal side of the extension catheter to the distal side thereof, so that the angiography catheter enters and passes through the arc-shaped contraction part. The arc-shaped contraction part has a use state of being swayed in the direction of the extension axis of the extension catheter.

[0008] As a preferred solution, the arc-shaped contraction portion is configured as an arc-shaped conical structure.

[0009] Optionally, in a natural state, the projected length of the arc-shaped contraction portion on the extension axis of the extension catheter is set to 3-20 mm; and / or

[0010] In a natural state, the circular cross-sectional diameter of the arc-shaped contraction portion is set to 0.5-10 mm.

[0011] Optionally, a rounded structure is provided at the shrinkage end on the distal side of the arc-shaped shrinkage portion.

[0012] Optionally, a developing ring is provided on the extension duct, and the developing ring is installed at a portion of the extension duct adjacent to the arc-shaped contraction portion.

[0013] Optionally, the extendable intracranial angiography catheter further comprises an auxiliary component, wherein the auxiliary component is fixedly connected to the proximal end of the extension catheter, the auxiliary component comprises a fixedly arranged sheath and a connecting seat, the proximal end of the angiography catheter is arranged in the sheath, and the angiography catheter and the sheath are slidably configured; the connecting seat is arranged on a side of the sheath away from the angiography catheter, and an auxiliary cavity connected to the angiography channel is arranged in the connecting seat.

[0014] Optionally, the angiography catheter includes a tube body and an angiography body, the proximal end of the tube body extends through the proximal end of the extension catheter, the distal end of the tube body and the proximal end of the angiography body are fixedly connected, the tube body and the angiography body jointly construct the angiography channel, and the extension catheter is sleeved on the outer periphery of the tube body.

[0015] As a preferred embodiment, the imaging body includes a first curved segment, a first connecting segment, a second curved segment and a second connecting segment which are sequentially connected from its proximal end to its distal end; the tube body and the first curved segment form a J-shaped structure; and the first connecting segment, the second curved segment and the second connecting segment form an L-shaped structure.

[0016] In a second aspect, the utility model provides an interventional system, including the above-mentioned extendable intracranial angiography catheter.

[0017] Optionally, the interventional system further comprises a side branch component, which comprises a sheath, a connecting tube and a side branch valve, wherein the sheath is mounted on the intracranial extendable angiography catheter, and the connecting tube is connected between the sheath and the side branch valve.

[0018] The technical solution provided by the utility model has the following advantages:

[0019] 1. The intracranial extendable angiography catheter provided by the utility model comprises an angiography catheter and an extension catheter, wherein an angiography channel is arranged inside the angiography catheter; the extension catheter is sleeved on the outer periphery of the angiography catheter, and the angiography catheter is arranged to be slidably connected to the extension catheter; an arc-shaped contraction portion is arranged on the distal end side of the extension catheter, and the arc-shaped contraction portion is a flexible structure.

[0020] The intracranial extendable angiography catheter of this structure is slidably configured to be sleeved on the extension catheter, so that the extension catheter can establish a pushing path for the angiography catheter, so that the angiography catheter can be pushed to align with the target area under the action of external force, so that the angiography channel in the angiography catheter can inject contrast agent into the target area; under the action of external force, the angiography catheter moves from the proximal side of the extension catheter to the distal side thereof, so that the angiography catheter enters through the arc-shaped contraction portion, and the arc-shaped contraction portion has a use state of swinging in the direction of the extension axis of the extension catheter, and the arc-shaped contraction portion is used to stick and wrap the extension catheter to strengthen the restraining force of the cooperation between the angiography catheter and the extension catheter, promote the stability of the combination, so that the angiography catheter can obtain a stable and reliable injection position, and improve the actual angiography effect; and the provided arc-shaped contraction portion is conducive to pushing the component into the femoral artery route, avoiding damage to the inner wall of the blood vessel, and improving the pushing safety.

[0021] 2. The interventional system provided by the utility model includes an intracranial extendable angiography catheter. Therefore, the intracranial extendable angiography catheter can obtain a stable and favorable injection position, ensure the expected reliable angiography effect, and has the advantages of good push safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the intervention system provided by the utility model;

[0024] Figure 2 A schematic cross-sectional view of the intervention system provided by the utility model from a top view;

[0025] Figure 3 A partial schematic diagram of an extended catheter in the intracranial extendable angiography catheter provided by the utility model;

[0026] Figure 4 A partial schematic diagram of another embodiment of an extension catheter in the intracranial extendable angiography catheter provided by the utility model;

[0027] Figure 5 A schematic cross-sectional view of the intervention system provided by the present invention;

[0028] Figure 6 A schematic diagram of the structure of angiography catheter and sheath in the intracranial extendable angiography catheter provided by the utility model;

[0029] Figure 7 A schematic diagram of the structure of angiography catheter in the intracranial extendable angiography catheter provided by the utility model;

[0030] Description of reference numerals:

[0031] 1- angiography catheter; 11- tube body; 12- angiography body; 121- first curved section; 122- first connecting section; 123- second curved section; 124- second connecting section;

[0032] 2- extension catheter; 21- arc-shaped contraction;

[0033] 3-catheter seat;

[0034] 4- auxiliary component; 41- sheath; 42- connection seat;

[0035] 5-side branch component; 51-tube sheath; 52-connecting tube; 53-side branch valve. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[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 "connection", "connected", and "connection" 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] In the following description, the side of the equipment closer to the operator when in use is referred to as the proximal end, and the side farther from the operator is referred to as the distal end.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1

[0042] This embodiment provides an intracranial extendable angiography catheter, see Figures 1 to 4 The invention comprises an angiographic catheter 1 and an extension catheter 2. The angiographic catheter 1 is provided with an angiographic channel. The extension catheter 2 is sleeved on the outer periphery of the angiographic catheter 1. The angiographic catheter 1 is configured to be slidably connected to the extension catheter 2. The distal end of the extension catheter 2 is provided with an arc-shaped contraction portion 21. The arc-shaped contraction portion 21 is a flexible structure. The arc-shaped contraction portion 21 can be made of soft nylon material.

[0043] In this embodiment, the angiography catheter 1 is slidably configured to be sleeved on the extension catheter 2, so that the extension catheter 2 can establish a pushing path for the angiography catheter 1, so that the angiography catheter 1 is pushed to align with the target area under the action of external force, so that the angiography channel in the angiography catheter 1 can inject contrast agent into the target area; under the action of external force, the angiography catheter 1 can move from the proximal side of the extension catheter 2 to the distal side thereof, so that the angiography catheter 1 enters through the arc-shaped contraction portion 21, and the arc-shaped contraction portion 21 has a use state of swinging in the direction of the extension axis of the extension catheter 2. The arc-shaped contraction portion 21 is used to stick and wrap the extension catheter 2 to strengthen the restraining force of the cooperation between the angiography catheter 1 and the extension catheter 2, promote the stability of the combination, so that the angiography catheter 1 can obtain a stable and reliable injection position, and improve the actual angiography effect; and the arc-shaped contraction portion 21 is provided to facilitate the pushing and introduction of the component into the femoral artery route, avoid damage to the inner wall of the blood vessel, and improve the pushing safety.

[0044] See also Figure 2 and Figure 3 The arc-shaped contraction portion 21 can wrap the angiography catheter 1 very well. After the angiography catheter 1 is in place and forms a loop, the arc-shaped contraction portion 21 can fit more closely with the angiography catheter 1 during the process of pushing the extension catheter 2 through the bend, and there will be no "window sill effect". Therefore, the arc-shaped contraction portion 21 of the extension catheter 2 will not get stuck in other positions of the blood vessel, making it difficult to push the extension catheter 2.

[0045] Of course, under the action of external force, the angiographic catheter 1 can move from the distal end side to the proximal end side of the extension catheter 2, so that the angiographic catheter 1 exits the arc-shaped contraction portion, and the arc-shaped contraction portion deflects away from the extension axis direction of the extension catheter 2 to reset.

[0046] In this embodiment, see Figure 3 and Figure 4The arc-shaped contraction portion 21 is set to an arc-shaped conical structure, which can be similar to a smoothly transitioned sheep horn structure.

[0047] In some embodiments, in a natural state, the projected length of the arc-shaped contraction portion 21 on the extension axis of the extension catheter 2 is set to 3-20 mm.

[0048] In some embodiments, in a natural state, the circular cross-sectional diameter of the arc-shaped contraction portion 21 is set to 0.5-10 mm. Figure 3 The diameter of the distal end of the arc-shaped contraction portion 21 is smaller than Figure 4 The distal end port diameter of the arc-shaped constriction 21 is shown.

[0049] Further, see Figure 3 and Figure 4 In order to promote smooth pushing of the extension catheter 2 and reduce the damage of the extension catheter 2 to the blood vessel wall, the shrinkage end of the distal end of the arc-shaped contraction part 21 is provided with a rounded structure.

[0050] See also Figure 3 and Figure 4 The extension catheter 2 is provided with a developing ring 22, which is installed at the portion of the extension catheter 2 adjacent to the arc-shaped contraction portion 21. The position of the developing ring 22 is identified by an external device to determine the position of the arc-shaped contraction portion 21 at the distal end of the extension catheter 2.

[0051] See also Figure 1 and Figure 2 The intracranial extendable angiography catheter also includes a catheter seat 3, which is sleeved and fixed on the outer wall of the extension catheter 2, and the angiography catheter 1 is inserted into the catheter seat 3.

[0052] In this embodiment, see 2 and Figure 6 The angiography catheter 1 includes a tube body 11 and an angiography body 12. The proximal end of the tube body 11 extends through the proximal end of the extension catheter 2. The distal end of the tube body 11 and the proximal end of the angiography body 12 are fixedly connected. The tube body 11 and the angiography body 12 jointly construct an angiography channel. The extension catheter 2 is sleeved on the outer periphery of the tube body 11.

[0053] As a preferred solution, see Figure 6 The imaging body 12 includes a first curved segment 121, a first connecting segment 122, a second curved segment 123 and a second connecting segment 124 which are sequentially connected from the proximal end to the distal end thereof. The tube body 11 and the first curved segment 121 form a J-shaped structure, and the first connecting segment 122, the second curved segment 123 and the second connecting segment 124 form an L-shaped structure.

[0054] The intracranial extendable angiography catheter provided in this embodiment forms a J-shaped structure and an L-shaped structure at the distal end of the angiography catheter 1 through the tube body 11 and the angiography body 12, so that the distal end of the angiography catheter 1 can implement motion loops and superselective paths that match the human cerebral blood vessels and other tissues during interventional diagnosis, thereby improving the operability of the interventional device.

[0055] Of course, the tube body 11 and the first curved segment 121 , the first connecting segment 122 , the second curved segment 123 and the second connecting segment 124 may respectively form other shapes and structures, and are not limited to the shapes shown in the figure.

[0056] The intracranial extendable angiography catheter further comprises an auxiliary component 4, see Figure 5 and Figure 6 , the auxiliary component 4 is fixedly connected to the proximal end of the catheter seat 3; specifically, the auxiliary component 4 includes a fixedly arranged sheath 41 and a connecting seat 42, the proximal end of the contrast catheter 1 is arranged in the sheath 41, and the contrast catheter 1 and the sheath 41 are slidably arranged; the connecting seat 42 is arranged on the side of the sheath 41 away from the contrast catheter 1, and an auxiliary cavity connected to the contrast channel is arranged in the connecting seat 42. When it is determined that the distal end port of the contrast catheter 1 is facing the target contrast area, the contrast agent is introduced into the contrast channel of the contrast catheter 1 at the auxiliary cavity by the external contrast mechanism to be injected into the target contrast area.

[0057] In one embodiment, the sheath 41 and the connecting seat 42 are bonded to each other.

[0058] Example 2

[0059] This embodiment provides an intervention system. Figures 1 to 7 , which includes the intracranial extendable angiography catheter of Example 1.

[0060] When the angiography catheter 1 superselectively enters the cerebral artery, the angiography catheter 1 therein is limited by the arc-shaped contraction portion 21 to obtain a stable and favorable injection position, thereby ensuring the expected angiography effect.

[0061] As a preferred embodiment, the interventional system also includes a side branch component 5, which includes a sheath 51, a connecting tube 52 and a side branch valve 53. The sheath 51 is installed on an intracranial extendable angiography catheter, and the connecting tube 52 is connected between the sheath 51 and the side branch valve 53.

[0062] In one embodiment, the side branch component 5 can be used to introduce an anticoagulant into the extension catheter 2, wherein the connecting tube 52 is connected to the inner cavity of the extension catheter 2. For example, a container storing a sodium heparin solution is connected to the side branch valve 53, and after the introduction is started, the sodium heparin solution passes through the side branch valve 53 and the connecting tube 52 to enter the inner cavity of the extension catheter 2, which can play an anticoagulant role.

[0063] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An intracranial extendable angiography catheter, characterized in that: include: An angiography catheter (1) is provided with an angiography channel therein; An extension catheter (2) is sleeved on the outer circumference of the angiography catheter (1), and the angiography catheter (1) is configured to be slidably connected to the extension catheter (2); The distal end of the extension catheter (2) is provided with an arc-shaped contraction portion (21), which is a flexible structure. Under the action of external force, the angiography catheter (1) moves from the proximal end of the extension catheter (2) to the distal end thereof, so that the angiography catheter (1) enters and passes through the arc-shaped contraction portion (21). The arc-shaped contraction portion (21) has a use state in which it is swayed in the direction of the extension axis of the extension catheter (2).

2. The extendable intracranial angiography catheter according to claim 1, characterized in that: The arc-shaped contraction portion (21) is configured as an arc-shaped conical structure.

3. The intracranial extendable angiography catheter according to claim 2, characterized in that: In a natural state, the projected length of the arc-shaped contraction portion (21) on the extension axis of the extension catheter (2) is set to 3-20 mm; and / or In a natural state, the circular cross-sectional diameter of the arc-shaped contraction portion (21) is set to 0.5-10 mm.

4. The extendable intracranial angiography catheter according to claim 2, characterized in that: The constricted end portion on the distal end side of the arc-shaped contraction portion (21) is provided with a rounded corner structure.

5. The extendable intracranial angiography catheter according to claim 1, characterized in that: The extension duct (2) is provided with a developing ring (22), and the developing ring is installed on the portion of the extension duct (2) adjacent to the arc-shaped contraction portion (21).

6. The intracranial extendable angiography catheter according to claim 1, characterized in that: The intracranial extendable angiography catheter also includes an auxiliary component (4), which is fixedly connected to the proximal end of the extension catheter (2), and the auxiliary component (4) includes a fixed sheath (41) and a connecting seat (42). The proximal end of the angiography catheter (1) is arranged in the sheath (41), and the angiography catheter (1) and the sheath (41) are slidably configured; the connecting seat (42) is arranged on a side of the sheath (41) away from the angiography catheter (1), and an auxiliary cavity connected to the angiography channel is provided in the connecting seat (42).

7. The intracranial extendable angiography catheter according to claim 1, characterized in that: The angiography catheter (1) comprises a tube body (11) and an angiography body (12), the proximal end of the tube body (11) extends through the proximal end of the extension catheter (2), the distal end of the tube body (11) and the proximal end of the angiography body (12) are fixedly connected, the tube body (11) and the angiography body (12) jointly construct the angiography channel, and the extension catheter (2) is sleeved on the outer periphery of the tube body (11).

8. An interventional system, characterized in that: The invention comprises the extendable intracranial angiography catheter as described in any one of claims 1 to 7.

9. The interventional system according to claim 8, characterized in that: The interventional system also includes a side branch component (5), which includes a sheath (51), a connecting tube (52) and a side branch valve (53). The sheath (51) is installed on the intracranial extendable angiography catheter, and the connecting tube (52) is connected between the sheath (51) and the side branch valve (53).

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