CN219743654U

CN219743654U - Torsion-controllable guide wire

Info

Publication number: CN219743654U
Application number: CN202321202291.3U
Authority: CN
Inventors: 胡建强; 朱凤磊; 张林飞
Original assignee: Nanjing Nuoyint Medical Technology Co ltd
Current assignee: Nanjing Nuoyint Medical Technology Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-09-26
Anticipated expiration: 2033-05-18

Abstract

The utility model discloses a torsionally controllable guide wire, and belongs to the technical field of medical appliances. The guide wire comprises a guide wire body, wherein the guide wire body comprises a core wire, and a section of torsion control wire is wound on the peripheral surface of the distal end of the core wire; a section of safety wire is wound on the peripheral surfaces of the far end of the core wire and the torsion control wire together, and the length of the safety wire exceeds that of the torsion control wire; the distal end of the safety wire is smoothly tapered. The torsion control wire comprises 2-10 strands of monofilaments, and the 2-10 strands of monofilaments are wound into a twist shape along the distal end of the core wire. According to the utility model, a section of torsion control wire is added between the most distal end position of the core wire and the safety wire, and when the distal end of the guide wire rotates at the tortuous part of a blood vessel, the torsion control wire can rotate in time, so that the condition that the distal end of the guide wire gathers torsion tension is avoided, the whip phenomenon is avoided, and the control precision of the distal end of the guide wire is improved.

Description

Torsion-controllable guide wire

Technical Field

The utility model relates to a conventional auxiliary product for minimally invasive vascular interventional therapy, in particular to a torsionally controllable guide wire, and belongs to the technical field of medical appliances.

Background

The vascular intervention technology is a common minimally invasive treatment means, avoids surgical operation, adopts intravascular catheter operation only through femoral artery or radial artery puncture, and can realize vascular recanalization in a short time by conveying the treatment instrument to the vascular lesion part. The risk of the patient in operation is small, and the recovery after operation is fast. The interventional therapy has good development prospect. The guide wire product is used as a necessary product for vascular intervention operation, plays a role of establishing a passage, and subsequent instruments such as a bracket, a catheter and the like can smoothly reach an expected use position along the guide wire. Whether the guide wire can smoothly reach the lesion site to establish a passage determines success or failure of the operation and the operation time.

The current guide wire structure for vascular interventional operation in the market is shown in fig. 3, and mainly comprises an inner core and a spring at the head end, wherein the inner core can be made of one material integrally or made of a strong supporting material (such as stainless steel) at the proximal end, and made of a nickel-titanium alloy super-elastic material at the distal end. The distal end of the core is ground to taper, typically 2-8 steps. The spring at the head end is coated with a hydrophilic coating to reduce friction resistance, or the spring is coated with a high polymer material and then coated with the coating to reduce friction resistance.

The problems of the prior art are:

in the treatment of a stenosis occurring in a blood vessel such as a coronary artery of a heart or a site where a blood vessel is completely occluded by calcification (for example, chronic complete occlusion: CTO or the like), it is necessary to insert a guide wire for guiding a therapeutic device such as a balloon catheter or a stent into the blood vessel before the device;

in combination with fig. 4, the end core wire of the guide wire head in the prior art is too flat and soft, when the blood vessel is rotated around a tortuous part, the far end gathers torsional tension at an angulation position, in this case, if the rotation is continued, the guide wire axially rotates at a large angle, a whip phenomenon occurs, and the guide wire is difficult to selectively enter other target blood vessel branches.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides a torsion-controllable guide wire.

The utility model adopts the following technical scheme: the controllable torsion guide wire comprises a guide wire body, wherein the guide wire body comprises a core wire, and a section of torsion control wire is wound on the peripheral surface of the distal end of the core wire; a section of safety wire is wound on the peripheral surfaces of the far end of the core wire and the torsion control wire together, and the length of the safety wire exceeds that of the torsion control wire; the distal end of the safety wire is smoothly tapered.

Preferably: the torsion control wire comprises 2-10 strands of monofilaments, and the 2-10 strands of monofilaments are wound into a twist shape along the distal end of the core wire; the length of the torsion control wire is 5-60mm.

Preferably: the monofilaments are made of platinum-nickel materials, platinum-tungsten materials or gold materials, and the wire diameter of the monofilaments is 0.02-0.2mm.

Preferably: the length of the safety line is 50-300mm, and the line diameter is 0.02-0.2mm; the safety line is made of 304 stainless steel.

Preferably: the distal end of the core wire is a grinding section with the length of 80-450 mm; the grinding section is of a conical structure with a thick proximal end and a thin distal end, and the diameter of the thinnest part of the grinding section is 0.02-0.1mm.

The utility model has the beneficial effects that:

a section of torsion control wire is added between the most distal position of the core wire and the safety wire, the torsion control wire adjusts the elasticity of the distal end of the whole guide wire, and when the distal end of the guide wire rotates at the tortuous part of a blood vessel, the torsion control wire can rotate in time, so that the condition that the distal end of the guide wire gathers torsion tension is avoided, whiplash phenomenon is avoided, and the control precision of the distal end of the guide wire is improved;

the twisting control wire is composed of a plurality of strands of monofilaments, and when the guide wire is processed again, the softness of the formed twisting control wire can be changed only by selecting monofilaments with different materials or wire diameters or different strands, and the materials or the sizes of the core wires are not required to be redesigned, so that the processing of the guide wire with different specifications is simplified, and the processing efficiency of the guide wire is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a torsionally controllable guide wire according to the present utility model.

Fig. 2 is an enlarged view of the structure of the distal end of the guidewire of fig. 1.

Reference numerals illustrate: in the figure: 1. twisting the control wire; 2. a safety line; 3. and (3) a core wire.

Fig. 3 is a schematic structural view of a guide wire for vascular interventional operation in the prior art.

Fig. 4 is a schematic diagram of a prior art operation of a guide wire for vascular interventional surgery.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, a torsionally controllable guide wire is shown, the wire body comprising a core wire 3 of stainless steel. The two ends of the core wire 3 are divided into a distal end and a proximal end, and the distal end of the core wire 3 is a grinding section with the length of 80-450 mm. The grinding section is of a conical structure with a thick proximal end and a thin distal end and smooth surface, and the diameter of the thinnest part of the grinding section is 0.02-0.1mm. As a preferred example, the grinding segments may be in a flattened configuration.

As shown in fig. 1 and 2, a section of torsion control wire 1 is wound on the peripheral surface of the distal end of the core wire 3, and the length of the torsion control wire 1 is 5-60mm. Specific: the torsion control wire 1 comprises 2-10 strands of monofilaments, and the 2-10 strands of monofilaments are wound into a twist shape along the distal end of the core wire 3; the monofilament is made of platinum-nickel material, platinum-tungsten material or gold material, and the wire diameter of the monofilament is 0.02-0.2mm. When the guide wire is processed, the softness of the formed torsion control wire, namely the softness of the distal end of the core wire 3, can be changed only by selecting monofilaments with different materials or wire diameters or different strands; therefore, the material or the size of the core wire does not need to be redesigned, the processing of the guide wires with different specifications is simplified, and the processing efficiency of the guide wires can be improved.

A section of safety wire 2 with the length of 50-300mm is wound on the far end of the core wire 3 and the peripheral surface of the torsion control wire 1 together, and the length of the safety wire 2 exceeds the length of the torsion control wire 1, so that the effects of protecting and improving the connection strength are achieved. The distal end of the safety wire 2 is smoothly tapered to avoid damaging the vessel wall. In the embodiment, the safety line 2 is made of 304 stainless steel, and the line diameter is 0.02-0.2mm.

Working principle:

when the device is used, the core wire 3 of the guide wire is operated to enter the blood vessel, and when the distal end of the core wire 3 is controlled to rotate at the tortuous part of the blood vessel, the torsion control wire 1 can rotate in time, so that the phenomenon that the distal end of the core wire 3 gathers torsional tension to whip is avoided, and the control precision of the core wire 3 of the guide wire is improved.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The utility model provides a but turn round accuse guide wire, includes the seal wire body, its characterized in that: the guide wire body comprises a core wire (3), and a section of torsion control wire (1) is wound on the peripheral surface of the far end of the core wire (3); a section of safety wire (2) is wound on the periphery of the torsion control wire (1) and the far end of the core wire (3), and the length of the safety wire (2) exceeds the length of the torsion control wire (1); the distal end of the safety wire (2) is smoothly tapered.

2. A torsionally controllable guide wire as claimed in claim 1, wherein: the torsion control wire (1) comprises 2-10 strands of monofilaments, and the 2-10 strands of monofilaments are wound into a hemp shape along the distal end of the core wire (3); the length of the torsion control wire (1) is 5-60mm.

3. A torsionally controllable guide wire as claimed in claim 2, wherein: the monofilaments are made of platinum-nickel materials, platinum-tungsten materials or gold materials, and the wire diameter of the monofilaments is 0.02-0.2mm.

4. A torsionally controllable guide wire as claimed in claim 1, wherein: the length of the safety line (2) is 50-300mm, and the line diameter is 0.02-0.2mm; the safety line (2) is made of 304 stainless steel.

5. A torsionally controllable guide wire as claimed in claim 1, wherein: the far end of the core wire (3) is a grinding section with the length of 80-450 mm; the grinding section is of a conical structure with a thick proximal end and a thin distal end, and the diameter of the thinnest part of the grinding section is 0.02-0.1mm.