Controllable intracranial aneurysm plugging device

Abstract

The utility model relates to a controllable intracranial aneurysm plugging device. The controllable intracranial aneurysm plugging device comprises a conveying mechanism and a controllable expansion body, a far-end developing point and a near-end developing point are respectively arranged at two ends of the controllable expansion body; the conveying mechanism comprises a thin tube and an inner core wire penetrating through the thin tube, and the far end of the inner core wire penetrates into the controllable expansion body from the near-end developing point to be connected to the far-end developing point; the inner core wire can move relative to the thin tube in the length direction of the thin tube. Due to the fact that the releasing state and the releasing size of the expansion body can be controlled, the expansion body can be better matched with the shape and the size of the aneurysm, the expansion body can be better attached to the aneurysm, redundant operation in the operation process is reduced, operation time is saved, operation safety is guaranteed, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to a controllable intracranial aneurysm plugging device. BACKGROUND

[0002] The current intracranial aneurysm plugging device is all the ball or disc structure of self-release device, which is transported to the aneurysm through the microcatheter, and the plugging device is released naturally. This kind of release mode needs to push the device out of the microcatheter for a distance, and the plugging device can be opened. Before opening, it is similar to the stick shape of the guide wire, and the hardness is relatively large, facing the fragile aneurysm wall, there is a risk of poking the aneurysm, and the operator needs to be extra careful and needs certain release technology. And because the shape of the aneurysm is mostly irregular, after selecting the specification of the plugging device, it may appear matching deviation after being squeezed into the aneurysm, resulting in the need to adjust the release again, or even replace the product specification and release again, which prolongs the operation time and increases the operation risk. SUMMARY

[0003] The utility model solves the technical problem in view of the above -mentioned insufficient, provides a controllable intracranial aneurysm plugging device.

[0004] The utility model is realized through the following technical schemes:

[0005] A controllable intracranial aneurysm plugging device, the plugging device includes conveying mechanism and controllable inflation body, the two ends of controllable inflation body are provided with distal end developing point and proximal end developing point respectively, the conveying mechanism includes thin tube and inner core wire through the thin tube, the distal end of inner core wire is connected to the distal end developing point from the proximal end developing point and enters controllable inflation body, and the inner core wire is movable along the length direction of thin tube.

[0006] Further, the proximal end developing point is connected to the distal end of the thin tube.

[0007] Further, the inner core wire is movable along the length direction of the proximal end developing point.

[0008] Further, the controllable inflation body is a columnar structure that can change its cross-sectional area along its longitudinal extension and contraction.

[0009] Further, the controllable inflation body is woven from nickel-titanium wire and developing wire, and is subjected to pre-shaping treatment.

[0010] Further, the controllable intracranial aneurysm occlusion device, the developing wire is a platinum tungsten alloy wire or a platinum iridium alloy wire.

[0011] Further, the controllable intracranial aneurysm occlusion device, when the conveying mechanism conveys the controllable expansion body in a non-inflated state into an aneurysm, the inner core wire is pulled to make the distal end of the controllable expansion body close to the proximal end, and the controllable expansion body is inflated to tightly adhere to the inner wall of the aneurysm at a controllable speed.

[0012] Further, the controllable intracranial aneurysm occlusion device, the aneurysm occlusion device is released in an electrolytic or mechanical manner, so that the inner core wire and the proximal end developing point of the controllable expansion body are fixed together, and the final shape of the controllable expansion body is fixed.

[0013] Further, the controllable intracranial aneurysm occlusion device, the conveying mechanism completely pushes out the controllable expansion body in a non-inflated state outside the aneurysm cavity.

[0014] The advantages and effects of the utility model are:

[0015] 1. The intracranial aneurysm occlusion device provided by the utility model adopts an inner core wire to connect a controllable expansion body, is extruded and pushed by a conveying mechanism, is controlled to be inflated in an aneurysm, slowly adheres to an aneurysm wall, and is completely adhered to the aneurysm wall. The aneurysm occlusion device can avoid that a traditional occlusion device is opened into a ball from a stick shape in an aneurysm, the stick shape is likely to be close to the aneurysm wall, and damage is caused. The influence on an arterial blood vessel is avoided, and the patient does not need to take double-antibiotic drugs for a long time.

[0016] 2. The utility model can better match the shape and size of an aneurysm, better adhere to the aneurysm, match the aneurysm shape, reduce redundant operation in a surgical process, save surgical time, ensure the safety of the operation, and is convenient to operate. DRAWINGS

[0017] Figure 1 A structure schematic view of a non-inflated state of the intracranial aneurysm occlusion device provided by the utility model is shown.

[0018] Figure 2 A structure schematic view of an inflated state of the intracranial aneurysm occlusion device provided by the utility model is shown.

[0019] Figure 3 A non-inflated state schematic view of the intracranial aneurysm occlusion device provided by the utility model in an aneurysm is shown.

[0020] Figure 4The utility model discloses an intracranial aneurysm plugging device provided by the utility model shows the expansion state schematic diagram of the intracranial aneurysm plugging device in the aneurysm.

[0021] Mark explanation: 1 - thin tube, 2 - inner core silk, 3 - controllable expansion body, 4 - proximal end developing point, 5 - distal end developing point, 6 - aneurysm. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantage of the utility model clearer, the technical scheme in the utility model embodiment is described in more detail below in combination with the drawings in the utility model embodiment. The described embodiment is a part of the embodiment of the utility model, not all the embodiment. The embodiment described below is exemplary, and is intended to explain the utility model, and can not be understood as the limitation of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model. The embodiment of the utility model is described in detail below in combination with the drawings:

[0023] In the description of the utility model, it is understood that, unless otherwise stated, the meaning of "multiple" is two or more than two;The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore can not be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and therefore can not be understood as limiting the protection scope of the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and can not be understood as indicating or implying relative importance. In the description of the utility model, it is also necessary to explain that, unless otherwise stated and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Figure 1 、 2 The utility model discloses an intracranial aneurysm plugging device provided by the utility model shows the structure schematic diagram of the intracranial aneurysm plugging device. The aneurysm plugging device includes controllable expansion body 3 for supporting aneurysm inner wall and the conveying mechanism of controllable expansion body 3 is sent to the aneurysm and controls its expansion. As Figure 1As shown, the non-inflated state of the controllable inflation body 3 is approximately a columnar structure, which is woven into a mesh, and the two ends are respectively provided with a distal end developing point 5 and a proximal end developing point 4. The delivery mechanism includes a thin tube 1 and an inner core wire 2 penetrating through the thin tube 1, and the inner core wire 2 is movable along the length direction of the thin tube 1. The distal end of the inner core wire 2 penetrates into the controllable inflation body 3 from the proximal end developing point 4 of the controllable inflation body 3 and is connected to the distal end developing point 5 of the controllable inflation body 3. The proximal end developing point 4 of the controllable inflation body 3 is connected to the distal end of the thin tube 1, and the inner core wire 2 is movable along the length direction of the proximal end developing point 4 and the inner cavity of the controllable inflation body 3.

[0025] As shown in Figure 2 , 3 , the delivery mechanism completely pushes the non-inflated controllable inflation body out of the aneurysm cavity. When the delivery mechanism delivers the non-inflated controllable inflation body into the aneurysm 6, the distal end developing point 5 is located at the middle position of the aneurysm 6, and the inner core wire 2 is pulled to make the distal end of the controllable inflation body 3 close to the proximal end (the distal end developing point 5 is close to the proximal end developing point 4), and the controllable inflation body 3 expands to the inner wall of the aneurysm at a controllable speed as shown in Figure 4 , the inflation body fills the aneurysm cavity, which can avoid the stick of the rod-shaped body to the aneurysm wall and the sudden pop-out, and reduces the risk of operation. The release mode of the aneurysm occlusion device is electrolytic release or mechanical release. When the thin tube 1 is released, the inner core wire and the proximal end developing point 4 of the controllable inflation body 3 are fixed together by mechanical force or electrolytic dissolution, and the final shape of the controllable inflation body 3 is fixed.

[0026] The controllable inflation body 3 is woven by nickel-titanium wire and developing wire into a columnar structure which can change the cross-sectional area along the longitudinal stretching and contraction, and is subjected to pre-shaping treatment. The columnar structure has no edges and corners, and each part is smoothly and arcuately transitioned. The developing wire can be platinum-tungsten alloy wire or platinum-iridium alloy wire. The controllable inflation body 3 contains the developing wire, is developed as a whole, and is provided with a developing point (the distal end developing point 5 and the proximal end developing point 4) at each end to mark the position of the controllable inflation body 3.

[0027] The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the implementation range of the present application. Any equivalent changes and modifications made within the protection scope of the present application should be considered to fall within the protection scope of the present application.

Claims

1. A controllable intracranial aneurysm occlusion device, characterized in that: The blocking device comprises a conveying mechanism and a controllable expansion body (3); a distal development point (5) and a proximal development point (4) are respectively provided at both ends of the controllable expansion body (3); the conveying mechanism comprises a thin tube (1) and an inner core wire (2) passing through the thin tube (1); the distal end of the inner core wire (2) passes through the controllable expansion body (3) from the proximal development point (4) and is connected to the distal development point (5); the inner core wire (2) is movable relative to the thin tube (1) along its length direction.

2. A controllable intracranial aneurysm occlusion device according to claim 1, characterized in that: The proximal developing point (4) is connected to the distal end of the capillary tube (1).

3. The controllable intracranial aneurysm occlusion device according to claim 1, characterized in that: The inner core wire (2) is movable relative to the proximal developing point (4) along its length direction.

4. The controllable intracranial aneurysm occlusion device according to claim 1, characterized in that: The controllable expansion body (3) is a columnar structure whose cross-sectional area can be changed as it expands and contracts longitudinally.

5. The controllable intracranial aneurysm occlusion device according to claim 1, characterized in that: The controllable expansion body (3) is woven from nickel-titanium wire and developing wire, and is pre-shaped.

6. The controllable intracranial aneurysm occlusion device according to claim 5, characterized in that: The developing wire is a platinum-tungsten alloy wire or a platinum-iridium alloy wire.

7. The controllable intracranial aneurysm occlusion device according to claim 1, characterized in that: When the conveying mechanism conveys the controllable expandable body (3) in a non-expanded state into the aneurysm (6), the inner core wire (2) is pulled to move the distal end of the controllable expandable body (3) closer to the proximal end, and the controllable expandable body (3) expands at a controllable speed until it is close to the inner wall of the aneurysm.

8. The controllable intracranial aneurysm occlusion device according to claim 7, characterized in that: The release method of the aneurysm occlusion device is electrical release or mechanical release, so that the inner core wire (2) and the proximal imaging point (4) of the controllable expansion body (3) are fixed together, fixing the final shape of the controllable expansion body (3).

9. The controllable intracranial aneurysm occlusion device according to claim 7, characterized in that: The delivery mechanism completely pushes the controllable expandable body (3) in a non-expanded state out of the aneurysm (6) cavity.

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