CN118662760A - Vascular intervention guide wire - Google Patents

Abstract

The present invention discloses a vascular intervention guide wire, comprising a first core wire and a second core wire arranged in sequence from the proximal end to the distal end, the first core wire and the second core wire are connected by a connecting tube, the distal end of the first core wire is fixed with a first inner docking piece and a first outer docking piece from the inside to the outside, the proximal end of the second core wire is fixed with a second inner docking piece and a second outer docking piece from the inside to the outside, the first inner docking piece and the second inner docking piece are snapped into place to form a circumferential limit fit, the first outer docking piece and the second outer docking piece are spirally connected into place to form an axial limit fit, the connecting tube is sleeved on the outside of the first outer docking piece and the second outer docking piece, and extends in the proximal and distal directions respectively to cover partial areas of the first core wire and the second core wire. The present invention not only facilitates the rapid connection between the first core wire and the second core wire, but also significantly improves the stability and reliability of the connection, ensuring that the torsion control performance of the guide wire during use is not affected.

Description

Vascular Intervention Guidewire

Technical Field

The present invention relates to the technical field of medical devices, and in particular to a vascular intervention guidewire.

Background Art

As disclosed in the Chinese utility model patent CN215018572U, the existing guidewire for vascular intervention is usually formed by joining two parts, a first core wire A and a second core wire B, to ensure that different materials can be used to make these two parts to meet different performance requirements. During the joining process, a sleeve C is sleeved at the joint of the first core wire A and the second core wire B, and glue is filled in the sleeve C to achieve the bonding of the first core wire A, the second core wire B and the sleeve C. However, since the remaining space D in the inner cavity of the sleeve C is very small after accommodating the first core wire A and the second core wire B, the amount of glue filled is limited. Therefore, this joining structure has the risk of the joint falling off, and the safety of use is low.

In response to this problem, the above-mentioned CN215018572U proposes an improved vascular intervention guidewire, which adopts an inner and outer sleeve connection method, that is, a sleeve is sleeved on the outside of the core wire. Since the joint area between the sleeve and the core wire is increased, the space for filling glue is expanded, which indirectly increases the amount of glue, thereby enhancing the connection strength, reducing the risk of falling off at the joint, and improving the safety of guidewire use. Despite this, this viscose structure still has instability factors, because the glue itself is a soft connection, not only is there a risk of falling off, but it may also affect the twist control during use, resulting in low operating accuracy.

Summary of the invention

The technical problem to be solved by the present invention is to provide a vascular intervention guide wire in view of the above-mentioned defects in the prior art.

According to the present invention, a vascular intervention guide wire is provided, comprising a first core wire and a second core wire arranged in sequence from the proximal end to the distal end, the first core wire and the second core wire are connected by a connecting tube, the distal end of the first core wire is fixed with a first inner docking piece and a first outer docking piece from the inside to the outside, the proximal end of the second core wire is fixed with a second inner docking piece and a second outer docking piece from the inside to the outside, the first inner docking piece and the second inner docking piece are snapped into place to form a circumferential limit fit, the first outer docking piece and the second outer docking piece are spirally connected into place to form an axial limit fit, the connecting tube is sleeved on the outside of the first outer docking piece and the second outer docking piece, and extends in the proximal and distal directions respectively to cover partial areas of the first core wire and the second core wire.

Furthermore, the first inner docking member and the second inner docking member are connected by means of a buckle and a slot, and after the first inner docking member and the second inner docking member are rotationally docked into place, the buckle is inserted into the slot.

Furthermore, the buckle is a semi-cylindrical protrusion, and the slot is a semi-cylindrical groove.

Furthermore, one of the first inner docking part and the second inner docking part is a plurality of connecting arms, and the other is a connecting column, the buckle is arranged on the inner wall of the connecting arm, the slot is arranged on the outer wall of the connecting column, and the plurality of connecting arms are screwed along the proximal end to the distal end of the connecting column to screw the buckle into the slot.

Furthermore, the distal end of the connecting wall has a tapered surface.

Furthermore, the connecting column is formed into a cone shape with a larger distal end and a smaller proximal end.

Furthermore, the distal end of the connecting tube is fixed to the proximal end of the second core wire, and the distal end of the first core wire is screwed along the proximal end of the connecting tube toward the distal direction so that the first external docking piece extends into the connecting tube and is spirally connected to the second external docking piece in place, and then the proximal end of the connecting tube is fixed to the distal end of the first core wire.

Furthermore, the second external butt joint member is fixed in the connecting pipe, and after the first external butt joint member and the second external butt joint member are screwed into place, the first external butt joint member contacts the connecting pipe.

Furthermore, the first external abutment member and the second external abutment member are both spiral structures, and after the first external abutment member and the second external abutment member are spirally connected in place, the spiral path of the first external abutment member and the spiral path of the second external abutment member are alternately arranged.

Furthermore, the first outer abutment member and the second outer abutment member have the same pitch, the same hand direction and the same helix angle.

Compared with the prior art, the present invention realizes the circumferential limit fit between the first inner and second inner butt joints, and the axial limit fit between the first outer butt joints and the second outer butt joints, by introducing the first inner butt joint and the first outer butt joint at the distal end of the first core wire, and correspondingly arranging the second inner butt joint and the second outer butt joint at the proximal end of the second core wire. This design replaces the traditional viscose connection method, which not only facilitates the rapid connection between the first core wire and the second core wire, but also significantly improves the stability and reliability of the connection, ensuring that the torsion control performance of the guide wire during use is not affected, thereby improving the accuracy and safety of surgical operations.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete understanding of the invention and its attendant advantages and features will be more readily appreciated by referring to the following detailed description taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of an embodiment of the present invention.

FIG. 4 is a schematic diagram of a partial structure of a first core wire in an embodiment of the present invention.

FIG. 5 is a partial cross-sectional view of FIG. 4 .

FIG. 6 is a schematic diagram of a partial structure of the second core wire in an embodiment of the present invention.

FIG. 7 is a partial cross-sectional view of FIG. 6 .

8 and 9 are schematic diagrams of the assembly process of the embodiment of the present invention.

In the accompanying drawings: 1 is the first core wire, 2 is the second core wire, 3 is the connecting tube, 4 is the first inner docking piece, 5 is the first outer docking piece, 6 is the second inner docking piece, 7 is the second outer docking piece, 8 is the buckle, and 9 is the slot.

It should be noted that the drawings are used to illustrate the present invention, rather than to limit the present invention. Note that the drawings showing the structures may not be drawn to scale. In addition, in the drawings, the same or similar elements are marked with the same or similar reference numerals.

DETAILED DESCRIPTION

In order to make the contents of the present invention clearer and easier to understand, the contents of the present invention are described in detail below in conjunction with specific embodiments and drawings.

The "proximal end" and "distal end" referred to in the present invention should be understood as observed from the direction of the attending physician. The "proximal end" refers to the end close to the attending physician, which corresponds to the "left end" indicated in the reference drawing, and the "distal end" refers to the end away from the attending physician, which corresponds to the "right end" indicated in the reference drawing.

As shown in Figures 1 to 7, the vascular intervention guidewire of this embodiment includes a first core wire 1, a second core wire 2, and a connecting tube 3 connected between the first core wire 1 and the second core wire 2. The first core wire 1 and the second core wire 2 are both designed with a solid shaft, which ensures that the core wires have sufficient strength and durability. It is worth noting that the first core wire 1 has a higher rigidity than the second core wire 2, and is therefore more suitable as a supporting part of the guidewire, providing the necessary thrust to support the advancement of the guidewire in the blood vessel. On the contrary, the second core wire 2 has a higher flexibility, and is therefore more suitable for precise navigation in a complex vascular environment, reducing damage to the vascular wall. The connecting tube 3 is a hollow sleeve, which is cleverly sleeved at the junction of the first core wire 1 and the second core wire 2 to ensure a firm connection between the two.

The distal end of the first core wire 1 is fixed with a first inner docking piece 4 and a first outer docking piece 5 from inside to outside, and the proximal end of the second core wire 2 is fixed with a second inner docking piece 6 and a second outer docking piece 7 from inside to outside. The first inner docking piece 4 and the second inner docking piece 6 are arranged correspondingly and can be mutually engaged, and the first inner docking piece 4 and the second inner docking piece 6 are engaged in a circumferential limit fit. The first outer docking piece 5 and the second outer docking piece 7 are arranged correspondingly and can be mutually spirally connected, and the first outer docking piece 5 and the second outer docking piece 7 are spirally connected in place to form an axial limit fit. The connecting tube 3 is sleeved on the outside of the first outer docking piece 5 and the second outer docking piece 7, and extends in the proximal and distal directions respectively to cover the partial areas of the first core wire 1 and the second core wire 2, so that the proximal end of the connecting tube 3 is docked with the distal end of the first core wire 1 and the distal end of the connecting tube 3 is docked with the proximal end of the second core wire 2 to form the entire guide wire. It can be seen that this embodiment adopts a rotary plug-in mechanical connection structure, and simultaneously realizes circumferential limit fit and axial limit fit. This design replaces the traditional viscose connection method, which not only facilitates the quick connection between the first core wire 1 and the second core wire 2, but also significantly improves the stability and reliability of the connection, ensuring that the twist control performance of the guide wire is not affected during use, thereby improving the accuracy and safety of surgical operations.

The first inner docking member 4 and the second inner docking member 6 are mutually engaged by the cooperation of the buckle 8 and the slot 9. After the first inner docking member 4 and the second inner docking member 6 are rotated and docked in place, the buckle 8 is inserted into the slot 9 to form a circumferential limit fit. Specifically, the first inner docking member 4 is designed as a plurality of connecting arms, and the second inner docking member 6 is designed as a connecting column. The buckle 8 is arranged on the inner wall of the connecting arm, and the slot 9 is arranged on the outer wall of the connecting column. The distal end of the connecting arm has a conical surface design, and the shape of the connecting column is designed as a cone with a larger distal end and a smaller proximal end. This design helps to achieve natural alignment during the screwing process. When the plurality of connecting arms are screwed into place along the connecting column from the proximal end to the distal end, the buckle 8 will automatically screw into the slot 9 to achieve the engagement between the first inner docking member 4 and the second inner docking member 6, thereby ensuring the formation of a circumferential limit fit between the first core wire 1 and the second core wire 2. The buckle 8 is specifically designed as a semi-cylindrical protrusion, and the slot 9 is a corresponding semi-cylindrical groove. Such a design is not only conducive to achieving circumferential limiting, but also ensures the reliability of the circumferential limiting and prevents loosening or falling off during use.

The connection between the first external docking member 5 and the second external docking member 7 adopts a spiral structure, and the two have the same pitch, the same direction of rotation and the same helix angle, that is, the basic structure is the same. In this way, the first external docking member 5 and the second external docking member 7 can be spirally connected, and after the spiral connection is in place, the spiral path of the first external docking member 5 and the spiral path of the second external docking member 7 are staggered. It is worth noting that although the structures of the first external docking member 5 and the second external docking member 7 are basically the same, the positions of the fixed ends and free ends of the two are different. The proximal end of the first external docking member 5 is a fixed end and is connected to the first core wire 1, and the distal end of the first external docking member 5 is a free end, while the distal end of the second external docking member 7 is a fixed end and is connected to the second core wire 2, and the proximal end of the second external docking member 7 is a free end. When the first external docking member 5 and the second external docking member 7 are spirally connected in place, the spiral paths of the two are staggered to form a firm connection. At the same time, the first external docking member 5 and the second external docking member 7 are both spiral coils with equal outer diameters, equal wire diameters, and equal pitches, ensuring the uniform distribution of the connection strength. This connection method not only ensures that the torque transmission from the first core wire 1 to the second core wire 2 is completely and efficiently conducted, but also significantly improves the pushing force of the entire guide wire, thereby greatly enhancing the propulsion ability and stability of the guide wire in the blood vessel.

The distal end of the connecting tube 3 is fixed to the proximal end of the second core wire 2 and the second external docking piece 7 is covered therein, and the interior of the connecting tube 3 is tightly and fixedly connected to the exterior of the second external docking piece 7. After the distal end of the first core wire 1 is screwed toward the distal end along the proximal end of the connecting tube 3 so that the first external docking piece 5 extends into the connecting tube 3 and is spirally connected to the second external docking piece 7 in place, the exterior of the first external docking piece 5 contacts the interior of the connecting tube 3, and the proximal end of the connecting tube 3 is fixed to the distal end of the first core wire 1. The assembly steps of the connecting tube 3, the first core wire 1 and the second core wire 2 are as follows: First, the distal end of the connecting tube 3 is fixed to the proximal end of the second core wire 2 by welding or bonding, and the exterior of the second external docking piece 7 is tightly and fixedly connected to the interior of the connecting tube 3. Subsequently, the first outer docking piece 5 and the first inner docking piece 4 are screwed into the connecting tube 3 along the proximal end of the connecting tube 3 toward the distal end. During the process, see Figure 8, the first outer docking piece 5 and the second outer docking piece 7 are gradually spirally connected, and the first inner docking piece 4 is gradually sleeved on the second inner docking piece 6, until the buckle 8 on the first inner docking piece 4 is snapped into the slot 9 on the second inner docking piece 6, see Figure 9, the first outer docking piece 5 and the second outer docking piece 7 are spirally connected in place, and the first inner docking piece 4 and the second inner docking piece 6 are snapped into place. At this time, the proximal end of the connecting tube 3 is docked with the distal end of the first core wire 1, and it can be fixed to the distal end of the first core wire 1 by welding or bonding.

It can be seen that the present embodiment adopts a rotating plug-in mechanical connection structure, which combines the design of circumferential limit fit and axial limit fit, which significantly improves the stability and reliability of the guidewire connection and ensures the controllability and safety of the guidewire in a complex vascular environment.

It is understandable that the structures of the first inner docking member 4 and the second inner docking member 6 are interchangeable, that is, the first inner docking member 4 is a connecting column, and the second inner docking member 6 is a plurality of connecting arms, which does not affect the reliability and stability of the overall connection.

It is to be understood that, although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any person skilled in the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims (10)

1. A vascular intervention guide wire, comprising a first core wire (1) and a second core wire (2) arranged in sequence from a proximal end to a distal end, the first core wire (1) and the second core wire (2) being connected via a connecting tube (3), characterized in that a first inner docking piece (4) and a first outer docking piece (5) are fixed from the inside to the outside at the distal end of the first core wire (1), a second inner docking piece (6) and a second outer docking piece (7) are fixed from the inside to the outside at the proximal end of the second core wire (2), the first inner docking piece (4) and the second inner docking piece (6) are snapped into place to form a circumferential limit fit, the first outer docking piece (5) and the second outer docking piece (7) are spirally connected into place to form an axial limit fit, and the connecting tube (3) is sleeved on the outside of the first outer docking piece (5) and the second outer docking piece (7), and extends in the proximal and distal directions respectively to cover a portion of the first core wire (1) and the second core wire (2). 2. The vascular intervention guidewire according to claim 1, characterized in that the first inner docking member (4) and the second inner docking member (6) are connected by means of a buckle (8) and a slot (9), and after the first inner docking member (4) and the second inner docking member (6) are rotationally docked into place, the buckle (8) is snapped into the slot (9). 3. The vascular intervention guidewire according to claim 2, characterized in that the buckle (8) is a semi-cylindrical protrusion, and the slot (9) is a semi-cylindrical groove. 4. The vascular intervention guidewire according to claim 2 is characterized in that one of the first inner docking piece (4) and the second inner docking piece (6) is a plurality of connecting arms, and the other is a connecting column, the buckle (8) is arranged on the inner wall of the connecting arm, the slot (9) is arranged on the outer wall of the connecting column, and the plurality of connecting arms are screwed along the proximal end to the distal end of the connecting column to screw the buckle (8) into the slot (9). 5 . The vascular intervention guidewire according to claim 4 , characterized in that the distal end of the connecting wall has a tapered surface. 6 . The vascular intervention guidewire according to claim 4 , characterized in that the connecting column is formed into a cone with a larger distal end and a smaller proximal end. 7. The vascular intervention guidewire according to claim 1 is characterized in that the distal end of the connecting tube (3) is fixed to the proximal end of the second core wire (2), and the distal end of the first core wire (1) is screwed along the proximal end of the connecting tube (3) toward the distal end so that the first external docking piece (5) extends into the connecting tube (3) and is spirally connected to the second external docking piece (7) in place, and then the proximal end of the connecting tube (3) is fixed to the distal end of the first core wire (1). 8. The vascular intervention guidewire according to claim 7, characterized in that the second external docking piece (7) is fixed in the connecting tube (3), and after the first external docking piece (5) and the second external docking piece (7) are spirally connected in place, the first external docking piece (5) contacts the connecting tube (3). 9. The vascular intervention guidewire according to claim 7, characterized in that the first external docking member (5) and the second external docking member (7) are both spiral structures, and after the first external docking member (5) and the second external docking member (7) are spirally connected in place, the spiral path of the first external docking member (5) and the spiral path of the second external docking member (7) are staggered. 10. The vascular intervention guidewire according to claim 9, characterized in that the first external abutment member (5) and the second external abutment member (7) have the same pitch, the same direction of rotation and the same helix angle.