CN200966659Y - Wedge-shaped frame of bifurcation blood vessels - Google Patents

Abstract

The utility model relates to a bifurcated blood vessel wedge-shaped support applied to the treatment of vascular bifurcation site lesions. It includes a self-expandable or balloon-expandable mesh cylindrical stent body, the stent body is provided with a development mark that coordinates with the blood vessel at the bifurcation, and at least one end of the stent body is a wedge-shaped end with a development mark; Abandon the flush structure design of both ends of the traditional stent, and match the lumen of the bifurcation site, so that the stent can completely cover the lesion at the bifurcation site of the vessel, and will not cause overlap with the main vessel stent; set on the bifurcation stent There are developing marks, which are convenient for positioning and operation; the wedge-shaped end of the stent is restrained by means of buckle, binding, etc., so as to avoid the separation of the wedge-shaped end stent and the delivery instrument during the operation.

Description

Bifurcated Vessel Wedge Stent

technical field

The utility model belongs to the field of instruments applied in the human body, and relates to a bifurcated blood vessel wedge-shaped support applied to the treatment of vascular bifurcation site lesions.

Background technique

Most of the known vascular stents are net-shaped cylindrical structures with uniform head and tail and consistent shape. As shown in Figure 1, the vascular stent 1 of this structure is only limited to the treatment of single vessel lesions, because its two ends are flush ends. , for the common lesion c that occurs at the bifurcation of the main vessel a and the branch vessel b, as shown in Figure 2, it cannot be fully and effectively covered, which affects the treatment effect. Fig. 3 has enumerated the deficiency that uses existing vascular stent 1 to exist in the surgical operation of vascular bifurcation site, wherein (a) is that the lesion at the proximal end of the branch vessel is not completely covered by the stent 1; (b) is that the lesion at the proximal end of the branch vessel is completely covered. Covering, but the end of the stent 1 protrudes too much into the main vessel, causing inconvenience to the operation of the main vessel; (c) and (d) are Crush kissing techniques, first expand the stent 1 in the branch vessel, and leave a part In the main blood vessel, the stent reserved in the main blood vessel is expanded, and at the same time, one end of the branch vessel stent is squeezed to be close to the wall of the main vessel, and then the hole is reamed on the branch vessel stent. This Crush kissing technique is relatively complicated to operate, and thrombus is easy to form at the overlapping part A of the stent.

Contents of the invention

The purpose of the utility model is to overcome the deficiency that the existing vascular stent cannot fully cover the lesions of the vascular bifurcations, and provide a bifurcated blood vessel that is convenient for operation and can fully cover the lesions of the vascular bifurcations to achieve a good therapeutic effect. Wedge bracket.

The technical solution adopted in the utility model: a bifurcated blood vessel wedge-shaped stent, including a self-expanding or balloon-expandable mesh cylindrical stent body, the stent body is provided with a developing mark that coordinates with the blood vessel at the bifurcation position, and the At least one end of the above-mentioned stent body is a wedge-shaped end with a development mark.

The wedge-shaped end of the bracket body is provided with a narrow and long opening, and the contour line of the opening end surface is a straight line or a regular or irregular curve.

There is at least one developing mark on the wedge-shaped end of the stent body, which is in the shape of points, lines or planes.

The tip and the root of the wedge-shaped end of the stent body are respectively provided with developing marks, which are separated from the opposite sides of the long and narrow opening of the stent body.

At least one set of buckles are arranged on both sides of the opening of the bracket body.

The said buckle is a structure of a sub-button and a female buckle, the sub-button and the female buckle are separated on both sides of the opening, and the buckles are in the shape of a line, a circle, or an ellipse.

The stent body is selected from materials with good biocompatibility and supporting force, such as 316L medical stainless steel, nickel-based alloys, cobalt-based alloys, shape memory alloy metal materials and their alloy materials, or degradable or non-degradable polymer materials .

The developing marks are selected from materials with good biocompatibility and X-ray opaque properties, such as gold, platinum, tungsten, tantalum metals and their alloy materials, or other polymer materials.

The imaging mark is an inherent component of the stent body itself, or a material with good biocompatibility and X-ray opaque properties is selected and attached to the stent body by means of inlaying, socketing, coating, and plating.

The positive beneficial effect that the utility model has:

1. Abandoning the flush structure design of both ends of the traditional stent, one end of the stent is designed as a wedge-shaped structure to match the lumen of the bifurcation site, so that the stent can completely cover the lesion at the bifurcation site of the vessel without causing damage to the main vessel. Overlapping of vascular stents;

2. There is a development mark on the bifurcation stent. During the operation, the stent can be rotated to a suitable angle according to the development mark, and then the stent can be expanded to facilitate positioning and operation;

3. The wedge-shaped end of the stent is constrained by buckles, bindings, etc., to avoid separation of the wedge-shaped end stent from the delivery device during the operation;

4. The structure is simple, the use is convenient, the treatment effect is improved, and it is suitable for the treatment of various vascular bifurcation lesions.

Description of drawings

Fig. 1 is the structural schematic diagram of existing vascular stent;

Figure 2 is a schematic diagram of lesions at the bifurcation of blood vessels;

Figure 3 (a), (b), (c), (d) is a schematic diagram of the existing vascular stent implanted into the blood vessel bifurcation;

Fig. 4 is the front view of the structural representation of the utility model;

Fig. 5 is the bottom view of the structural representation of the utility model;

Fig. 6 is an enlarged view of part B in Fig. 4;

Fig. 7 (a), (b), (c) is the hasp structure schematic diagram of the utility model;

Figure 8 (a), (b), (c) is a schematic diagram of the stent of the present invention implanted into the blood vessel bifurcation;

Fig. 9 is a schematic diagram of the mosaic structure of the development mark of the present invention;

Fig. 10 is a schematic diagram of the socket structure of the developing mark of the present invention.

Detailed ways

Referring to Fig. 4, Fig. 5 and Fig. 6, a bifurcated vessel wedge-shaped stent includes a stent body 1, a development mark 2, etc.; the stent body 1 is a mesh cylinder structure, and one end of the stent body 1 is wedge-shaped The wedge-shaped end is provided with an axially long and narrow opening 101, and the contour line of the end surface of the opening 101 can be a straight line or a regular or irregular curve. Features, etc. are comprehensively determined; in order to facilitate the positioning of the stent body 1 during the operation, one or more developing marks 2 are set on the wedge-shaped end of the stent body 1, and developing marks 201 and 202 can be respectively set on the tip and root of the wedge-shaped end , separated from the opposite sides of the narrow and long opening 101 of the stent body 1, or arranged at other adjacent parts of the wedge-shaped end, or at the same time, one or more developing marks can be set at any other position of the stent body 1, and the developing marks can be dots, lines , surface and other forms are used to coordinate the positioning of the wedge-shaped end stent and the blood vessel at the bifurcation site. One or more sets of buckles 102 are arranged on both sides of the 101 part, and the wedge-shaped stent is constrained by the buckles 102 or by binding methods, so that the stent can be tightly attached to the delivery device before expansion, and the stent body can be avoided during the operation. The wedge-shaped end separates from the delivery instrument.

Referring to Fig. 7 (a), (b) and (c), the buckle 102 is a sub-button structure, and the sub-button and the female buckle are located on both sides of the opening 101, and they are "T" shaped after being buckled. , the buckle joint can be approximately in-line as shown in (a) or approximately circular as shown in (b) or approximately elliptical as shown in (c); Tight, when the stent body 1 expands, the snap-in buckle 102 is automatically disengaged.

Referring to Fig. 8 (a), (b) and (c), during the operation of implanting the utility model into the bifurcation of blood vessels, in (a) in the figure, firstly, the stent body 1 is adjusted to the appropriate position through the developing marks 201 and 202. position and angle, and then use the balloon 3 to expand the stent body 1, so that the end surface profile of the opening 101 just matches the opening of the blood vessel bifurcation. It will not protrude into the main blood vessel; (b) in the figure is to withdraw the balloon 3, and implant a traditional stent in the main blood vessel as needed; in the figure (c), the wedge-shaped stent body 1 will not cause any interference with the main blood vessel stent. overlapping.

Referring to FIG. 9 , the developing mark 2 can be embedded in the bracket body 1 .

Referring to FIG. 10 , the developing mark 2 is a hollow cylinder, which is sleeved on the mesh-shaped slot 103 of the bracket body 1 .

The development mark 2 is an inherent component of the stent body 1 itself, or a material with good biocompatibility and X-ray opacity is selected, and is attached to the stent body 1 by means of inlaying, socketing, coating, plating, etc.

The bifurcated vessel wedge-shaped stent may be a self-expandable or balloon-expandable stent.

The stent body 1 can be selected from materials with good biocompatibility and supporting force, such as 316L medical stainless steel, nickel-based alloys, cobalt-based alloys, shape memory alloys and other metals, alloy materials or degradable or non-degradable materials. polymer materials, etc.

The developing mark 2 can be selected from materials with good biocompatibility and X-ray opaque properties, such as gold, platinum, tungsten, tantalum and other metals and their alloy materials, or other non-metallic materials, or other polymer materials.

Claims (9)

1. A wedge-shaped stent for bifurcated blood vessels, comprising a self-expandable or balloon-expandable mesh cylinder stent body, the stent body is provided with a development mark that coordinates with the blood vessels at the bifurcation position, and is characterized in that the stent At least one end of the body (1) is a wedge-shaped end with a developing mark (2). 2. The bifurcated vessel wedge-shaped stent according to claim 1, characterized in that the wedge-shaped end of the stent body (1) is provided with a narrow and long opening (101), and the end surface contour of the opening (101) is straight or regular , Irregular curve. 3. The wedge-shaped stent for bifurcated blood vessels according to claim 1, characterized in that the wedge-shaped end development mark (2) of the stent body (1) has at least one place, which is in the shape of a point, a line, or a plane. 4. The bifurcated vessel wedge-shaped stent according to claim 1, characterized in that the tip and root of the wedge-shaped end of the stent body (1) are respectively provided with developing marks (201), (202), separated from the stent body (1) opposite sides of the long and narrow opening (101). 5. The bifurcated vessel wedge-shaped stent according to claim 2, characterized in that at least one set of buckles (102) are provided on both sides of the opening (101) of the stent body (1). 6. The bifurcated vessel wedge-shaped stent according to claim 5, characterized in that the buckle (102) is a sub-button structure, the sub-button and the female buckle are separated on both sides of the opening (101), and the buckle joint is It is straight, round and oval. 7. The bifurcated vessel wedge-shaped stent according to claim 1, characterized in that the stent body (1) is selected from materials with good biocompatibility and supporting force, such as 316L medical stainless steel, nickel-based alloy, cobalt Base alloys, shape memory alloy metal materials and their alloy materials, or degradable or non-degradable polymer materials. 8. The bifurcated vascular wedge-shaped stent according to claim 1, characterized in that said developing mark (2) is made of materials with good biocompatibility and X-ray opaque properties, such as gold, platinum, tungsten, tantalum Metal and its alloy materials, or other polymer materials. 9. The bifurcated vessel wedge-shaped stent according to claim 1, characterized in that the said developing mark (2) is an inherent component of the stent body (1) itself, or is selected to have good biocompatibility and impermeability The X-ray characteristic material is attached to the bracket body (1) by means of inlaying, socketing, coating and plating.

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