Guide wire

Abstract

The guide wire comprises a far-end core wire and a near-end core wire, the far-end core wire and the near-end core wire are connected through a connecting pipe, a winding wire is arranged on the outer surface of the far-end core wire, a hydrophilic coating is arranged on the outer surface of the winding wire, and a PTFE coating is arranged on the outer side face of the near-end core wire. According to the guide wire, after the far-end core wire and the near-end core wire are fully connected through the connecting pipe, the twisting control performance of the whole guide wire can be greatly improved, the twisting control performance of 1: 1 is achieved, and the ability of selecting bifurcated blood vessels in an operation is greatly improved; due to the hydrophilic coating of the far-end core wire and the PTFE coating of the near-end core wire, the surface of the whole guide wire has the hydrophilic or hydrophobic characteristic, the friction force between the guide wire and other matched instruments is greatly reduced, and the traceability of a product is better.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a guide wire. Background Art

[0002] The use of a guide wire is the key to the success of a PCI operation. The more complex the lesion is, the higher the requirements for the use of the wire are. The trackability and torque control of a guide wire are important indicators to measure the performance of the guide wire, and both are crucial for the wire to successfully reach and cross the lesion location. Most of the existing guide wires are of an integral structure. While having a certain length, they also need to take into account flexibility, resulting in poor trackability during the use of PCI operations. At the same time, the hydrophilic performance of the wire is poor, leading to poor trackability of the guide wire. Content of the Utility Model

[0003] For this reason, an object of the present utility model is to provide a guide wire to solve the problems mentioned in the background art and overcome the deficiencies existing in the prior art.

[0004] To achieve the above object, the present utility model adopts the following technical solutions:

[0005] A guide wire includes a distal core wire and a proximal core wire. The distal core wire and the proximal core wire are connected by a connecting tube. A winding wire is provided on the outer surface of the distal core wire, and a hydrophilic coating is provided on the outer surface of the winding wire. A PTFE coating is provided on the outer surface of the proximal core wire.

[0006] Further, the distal core wire includes a tip, a first tapered section, a cylindrical section, a second tapered section, and a first connection end connected in sequence. The first connection end is connected to the connecting tube.

[0007] Further, the winding wire includes a radiopaque winding wire and a stainless steel winding wire. The radiopaque winding wire is provided on the outer surface of the tip, and the stainless steel winding wire is provided on the outer surfaces of the first tapered section and the cylindrical section.

[0008] Further, the proximal core wire includes a second connection end. External threads are provided on the outer surfaces of the first connection end and the second connection end. Internal threads are provided on the inner surface of the connecting tube. The external threads of the first connection end and the second connection end are matched with the internal threads of the connecting tube to achieve threaded connection.

[0009] Further, the tip of the distal core wire is cylindrical, and the length of the cylindrical section is greater than the lengths of the tip and the first tapered section.

[0010] Further, the length of the stainless steel winding wire is greater than the length of the radiopaque winding wire.

[0011] Further, the distal core wire, the proximal core wire, and the connecting tube are all made of metal materials.

[0012] Further, a top bead is provided at the tip of the distal core wire.

[0013] Therefore, the present utility model has the following beneficial effects:

[0014] For a guide wire of the present utility model, after the distal core wire and the proximal core wire are fully connected through the connecting tube, the torsional controllability of the entire guide wire can be greatly improved to reach a torsional control performance of 1:1, greatly improving the ability to select bifurcated blood vessels during the operation. The hydrophilic coating of the distal core wire and the PTFE coating of the proximal core wire endow the entire surface of the guide wire with hydrophilic or hydrophobic properties, greatly reducing the friction with other cooperating instruments and making the tracking performance of the product better.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 is a schematic structural diagram of the guide wire of the present utility model.

[0018] In the figure: 1, developing winding wire; 2, stainless steel winding wire; 3, hydrophilic coating; 4, distal core wire; 5, connecting tube; 6, PTFE coating; 7, proximal core wire; 8, top bead; 401, tip; 402, first tapered section; 403, cylindrical section; 404, second tapered section; 405, first connection end; 701, second connection end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0020] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] As Figure 1 shown, a guide wire includes a distal core wire 4 and a proximal core wire 7. The distal core wire 4 and the proximal core wire 7 are connected by a connecting tube 5. A winding wire is provided on the outer surface of the distal core wire 4, and a hydrophilic coating 3 is provided on the outer surface of the winding wire. A PTFE coating 6 is provided on the outer surface of the proximal core wire 7.

[0022] In the guide wire of the present utility model, the distal core wire 4 and the proximal core wire 7 are of a split structure. After the distal core wire 4 and the proximal core wire 7 are fully connected through the connecting tube 5, the torsional controllability of the whole guide wire can be greatly improved to reach a torsional control performance of 1:1, greatly improving the ability to select bifurcated blood vessels during the operation. The hydrophilic coating 3 of the distal core wire 4 and the PTFE coating 6 of the proximal core wire 7 endow the whole guide wire with hydrophilic or hydrophobic characteristics, greatly reducing the friction with other cooperating instruments and making the tracking performance of the product better.

[0023] The winding wire of the guide wire of the present utility model is coated with a hydrophilic coating 3 on the outer surface, greatly reducing the friction with other cooperating instruments and making the tracking performance of the product better; and it can effectively reduce the friction between the outer surface of the winding wire of the guiding catheter and the inner wall of the blood vessel, thereby avoiding damage to the inner wall of the blood vessel.

[0024] As an implementation manner, the material of the connecting tube 5 is a metal material.

[0025] Further, the distal core wire 4 includes a tip 401, a first tapered section 402, a cylindrical section 403, a second tapered section 404, and a first connection end 405 connected in sequence. The first connection end 405 is connected to the connecting tube 5.

[0026] Specifically, as Figure 1 shown, the cross-sectional diameter of the tip 401 of the distal core wire 4 is the smallest. The cross-sectional diameter of one end of the first tapered section 402 connected to the tip 401 is the same as that of the tip 401. The cross-sectional diameter of the first tapered section 402 gradually increases in the direction away from the tip 401. The cross-sectional diameter of one end of the first taper connected to the cylindrical section 403 is the same as the cross-sectional diameter of the cylindrical section 403. The cross-sectional diameter of one end of the second tapered section 404 connected to the cylindrical section 403 is the same as the cross-sectional diameter of the cylindrical section 403. The cross-sectional diameter of the second tapered section 404 gradually increases in the direction away from the cylindrical section 403.

[0027] Further, the wire winding includes a developing wire winding 1 and a stainless steel wire winding 2. The developing wire winding 1 is disposed on the outer surface of the tip 401, and the stainless steel wire winding 2 is disposed on the outer surfaces of the first tapered section 402 and the cylindrical section 403.

[0028] As an implementation manner, the developing wire winding 1 and the stainless steel wire winding 2 can be wound by a spring winding machine.

[0029] As an implementation manner, the stainless steel wire winding 2 and the developing wire winding 1 are inserted into the processed distal end core wire 4 and welded using solder wire.

[0030] Further, the proximal end core wire 7 includes a second connection end 701. External threads are provided on the outer surfaces of the first connection end 405 and the second connection end 701, and internal threads are provided on the inner surface of the connecting pipe 5. The external threads of the first connection end 405 and the second connection end 701 are matched with the internal threads of the connecting pipe 5 to achieve threaded connection.

[0031] As an implementation manner, the connection manner between the first connection end 405 of the distal end core wire 4, the second connection end 701 of the proximal end core wire 7 and the connecting pipe 5 can be interference fit.

[0032] Further, the tip 401 of the distal end core wire 4 is cylindrical, and the length of the cylindrical section 403 is greater than the lengths of the tip 401 and the first tapered section 402.

[0033] As an implementation manner, the lengths of the tip 401 and the first tapered section 402 of the distal end core wire 4 are equal.

[0034] As an implementation manner, the length of the tip 401 of the distal end core wire 4 is less than the length of the first tapered section 402.

[0035] As an implementation manner, the lengths of the first tapered section 402 and the second tapered section 404 of the distal end core wire 4 are equal.

[0036] As an implementation manner, the length of the first tapered section 402 of the distal end core wire 4 is less than the length of the second tapered section 404.

[0037] As an implementation manner, the length of the cylindrical section 403 of the distal end core wire 4 is greater than the sum of the lengths of the tip 401, the first tapered section 402 and the second tapered section 404.

[0038] That is to say, the lengths and length relationships of the various parts of the distal end core wire 4 of the present utility model are not fixed. Those skilled in the art can select and set them according to the actual scenario and requirements. The present utility model does not make specific limitations on the lengths and length relationships of the various parts of the distal end core wire 4.

[0039] Further, the length of the stainless steel wire winding 2 is greater than that of the developing wire winding 1.

[0040] Further, the distal core wire 4, the proximal core wire 7 and the connecting tube 5 are all made of metal.

[0041] As an implementation manner, the distal core wire 4, the proximal core wire 7 and the connecting tube 5 are all made of stainless steel.

[0042] As an implementation manner, the distal core wire 4 is made of nitinol alloy, and the proximal core wire 7 and the connecting tube 5 are both made of stainless steel.

[0043] As an implementation manner, the distal core wire 4 and the proximal core wire 7 are made of nitinol alloy, and the connecting tube 5 is made of stainless steel.

[0044] As an implementation manner, the distal core wire 4 and the connecting tube 5 are made of stainless steel, and the proximal core wire 7 is made of stainless steel.

[0045] The structural design of connecting the distal core wire 4 and the proximal core wire 7 of the present utility model through the connecting tube 5 can perfectly solve the problem of connecting wire materials of different materials, so that the guiding wire product can have both the memory performance of the nitinol core wire and the excellent pushing performance of stainless steel.

[0046] Further, a top bead 8 is provided at the tip 401 of the distal core wire 4.

[0047] As an implementation manner, the distal information and the proximal core wire 7 can be processed by machining grinding or electrochemical corrosion.

[0048] The guiding wire of the present utility model has a simple structure. After the distal core wire 4 and the proximal core wire 7 are fully connected through the connecting tube 5, the torsional controllability of the whole guiding wire can be greatly improved to reach a torsional control performance of 1:1, greatly improving the ability to select bifurcated blood vessels during the operation. The hydrophilic coating 3 at the distal end and the PTFE coating 6 at the proximal end make the surface of the whole guiding wire have hydrophilic or hydrophobic characteristics, greatly reducing the friction with other cooperating instruments and making the tracking performance of the product better.

[0049] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Those skilled in the art can easily understand that the present utility model includes any combination of the utility model content and the specific implementation part of the above description and each part shown in the drawings. Due to space limitations and to make the description concise, the various solutions formed by these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0051] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present utility model without departing from the principle and purpose of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A guide wire, characterized in that: It comprises a distal core wire and a proximal core wire, wherein the distal core wire and the proximal core wire are connected via a connecting tube, a winding wire is arranged on the outer surface of the distal core wire, a hydrophilic coating is arranged on the outer surface of the winding wire, and a PTFE coating is arranged on the outer edge of the proximal core wire.

2. A guide wire according to claim 1, characterized in that: The distal core wire comprises a tip, a first tapered section, a cylindrical section, a second tapered section and a first connecting end which are connected in sequence, and the first connecting end is connected to the connecting tube.

3. A guide wire according to claim 2, characterized in that: The wire winding includes a developing wire winding and a stainless steel wire winding. The developing wire winding is arranged on the outer surface of the tip, and the stainless steel wire winding is arranged on the outer surfaces of the first conical section and the cylindrical section.

4. A guide wire according to claim 2 or 3, characterized in that: The proximal core wire includes a second connecting end, the outer surfaces of the first connecting end and the second connecting end are provided with external threads, the inner surface of the connecting tube is provided with internal threads, and the external threads of the first connecting end and the second connecting end cooperate with the internal threads of the connecting tube to achieve threaded connection.

5. A guide wire according to claim 2, characterized in that: The tip of the distal core wire is cylindrical, and the length of the cylindrical section is greater than the length of the tip and the first tapered section.

6. A guide wire according to claim 3, characterized in that: The length of the stainless steel winding wire is greater than the length of the developing winding wire.

7. A guide wire according to claim 1, characterized in that: The distal core wire, the proximal core wire and the connecting tube are all made of metal.

8. A guide wire according to claim 2 or 3 or 5 or 6, characterized in that: The tip of the distal core wire is provided with a top bead.

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