Novel hydrophobic coating long guide wire

Abstract

The utility model belongs to the technical field of ablation catheter auxiliary interventional instruments. The utility model provides a novel hydrophobic coating long guide wire which comprises a core wire, a winding wire and a coating, the core wire comprises a main body hard section and a guide soft section, and the main body hard section and the guide soft section are integrated and are formed by grinding. The winding wire is wound on the core wire main body hard section and the guide soft section, two ends of the winding wire are welded with the core wire, and a welding spot is hemispherical. The outer surface of the winding wire is coated with the coating, the coating belongs to a hydrophobic material, the friction coefficient between the guide wire and the tissue is greatly reduced, the smoothness between the guide wire and the tissue is improved, and damage to the tissue of the guide wire is reduced. The guide soft section of the long guide wire is only 20-40mm in length, so that the success rate of the guide wire entering a pulmonary vein opening can be effectively improved, and the efficiency of guiding an ablation catheter to be attached to the pulmonary vein opening is improved. The total length of the guide wire reaches 2.4-2.8 m, the guide wire does not need to be withdrawn under the condition that the guide sheath or the ablation catheter needs to be replaced, and the efficiency of replacing the guide sheath and the ablation catheter in an operation can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ablation catheter-assisted interventional instruments. Background Art

[0002] As an internal guidance assisted interventional device, coated guidewire is widely used in clinical cardiac ablation surgery via femoral vein puncture on patients with arrhythmia.

[0003] Chinese Patent 202321044577.3 discloses a precision lubricating coated guide wire with high core shaft dimensional stability, including an extension rod and a core shaft mechanism, one end of the extension rod is connected to a push rod, the outer side of the core shaft mechanism is surrounded by a smooth protective sleeve, one end of the core shaft mechanism is provided with a spring coil on the outer side, one end of the core shaft mechanism is connected to a soft section, and the outer side of the spring coil is provided with a lubricating coating. When the medical staff holds the push rod and pushes the push rod forward, the push rod pushes the protective hose forward, thereby contracting the shock-absorbing spring, reducing the collision force between the push rod and the core shaft mechanism, and making the core shaft mechanism more stable. The outer side of the push rod is surrounded by an anti-slip sleeve, and the medical staff holds the anti-slip sleeve. The anti-slip sleeve increases the friction, making it more convenient to hold and increasing safety. The lubricating coating on the outer side of the core shaft is polytetrafluoroethylene, which reduces the friction coefficient, effectively improves the lubrication between the guide wire and the muscle tissue, and reduces damage to the mucosa.

[0004] Chinese patent 202321552669.2 discloses a percutaneous nephroscopic guidewire with a safety mark, which belongs to the guiding device of a medical endoscope. The utility model includes a percutaneous nephroscopic guidewire with a J-shaped wire spring at the front and a primary color stainless steel guidewire body at the rear, or a percutaneous nephroscopic guidewire fully coated with PTFE coating, or a percutaneous nephroscopic guidewire not fully coated with PTFE coating, and a single-ring identification band and a widened identification band are formed at the end of the J-shaped wire spring at a distance of each centimeter; or a single-ring identification band, a double-ring identification band, a three-ring identification band, a four-ring identification band, a five-ring identification band, and a widened identification band. The present invention designed in this way can directly observe the distance between the expansion target and the skin; when using a fascia dilator for expansion, the depth of expansion can be accurately observed and mastered to avoid repeated operations that may cause kidney damage and bleeding due to excessive depth, or require re-expansion when it is too shallow; it greatly improves the accuracy and safety of percutaneous nephroscopic and percutaneous nephrostomy surgery.

[0005] However, the soft segment of the above patent is relatively long, and the long soft segment is easy to reverse or bend during surgery, making it difficult for the guidewire to enter the pulmonary vein, affecting the accuracy of guiding the ablation catheter to the pulmonary vein orifice, and further affecting the effectiveness and reliability of ablation. The reversed long soft segment is easy to be entangled on the ablation electrode of the ablation catheter, which may cause a short circuit. The total length of the guidewire currently used for pulmonary vein isolation on the market is about 1.8m, which is shorter than the sum of the lengths of the guide sheath and the ablation catheter. If the guide sheath or ablation catheter needs to be replaced during surgery, the guidewire must be withdrawn first, and then the guide sheath and ablation catheter must be replaced, and then the guidewire must be re-threaded, which greatly affects the efficiency of the operation. Utility Model Content

[0006] In order to solve the above problems, the utility model provides a novel hydrophobic coating long guide wire, and the specific technical solution is as follows:

[0007] A novel hydrophobic coated long guide wire, characterized in that it comprises a core wire, a winding wire and a coating;

[0008] The core wire comprises a main body hard segment and a guide soft segment, wherein the diameter of the guide soft segment gradually decreases from the proximal end to the end of the guide soft segment, and the diameter of the core wire ranges from φ0.55 mm to φ0.145 mm;

[0009] Further, the winding wire is wound around the core wire, and includes a main hard segment and a guide soft segment;

[0010] The winding wire is a flat wire or a round wire, the flat wire has a length of 0.155-0.355 mm and a width of 0.065-0.105 mm; the round wire has a diameter of φ0.05-0.15 mm;

[0011] Further, the coating is applied to the outer surface of the winding wire;

[0012] Furthermore, the welding points at the end of the guide soft segment and the proximal end of the main body hard segment are both hemispherical;

[0013] Furthermore, the total length of the guide wire is 1.5-2.8m, the length of the soft guide section is 20-40mm, and the end is "J" shaped, which is processed by heat setting.

[0014] Furthermore, the core wire is made of stainless steel, the main hard section and the guide soft section are integrated, and the guide soft section is formed by grinding.

[0015] Furthermore, the wire winding material is stainless steel or nickel-titanium alloy.

[0016] Furthermore, the proximal end of the main hard segment of the core wire and the distal end of the guide soft segment are connected to the winding wire by welding.

[0017] Furthermore, the coating is applied to the outer surface of the winding wire.

[0018] Furthermore, the coating material is a fluorine-containing hydrophobic polymer, preferably polytetrafluoroethylene.

[0019] The advantages and effects of this application are as follows:

[0020] The utility model provides a novel long guide wire with a hydrophobic coating and a shorter soft segment, which can effectively and accurately guide the ablation catheter to the targeted position such as the pulmonary vein orifice, thereby improving the effectiveness and reliability of ablation, and can reduce the risk of the guide wire guiding soft segment being reversed and folded or being entangled on the ablation electrode to cause a short circuit, thereby improving the safety of interventional ablation; it can also facilitate the replacement of the guide sheath or the ablation catheter without removing the guide wire, thereby significantly improving the efficiency of the operation.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0022] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0024] Figure 1 This is a schematic diagram of the structure of a new type of hydrophobic coating guide wire;

[0025] Figure 2 It is a partially enlarged schematic diagram of a guiding soft segment core wire of a new type of hydrophobic coating guide wire;

[0026] The reference numerals are as follows: 1. core wire; 2. winding wire; 3. coating; 4. guide soft segment; 5. main body hard segment. Specific embodiments

[0027] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0028] It should be understood that the references to "one embodiment" or "this embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "one embodiment" or "this embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0029] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0030] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0031] The term "at least one" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0032] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0033] Example

[0034] This embodiment introduces a novel hydrophobic coating long guide wire, such as Figure 1 , 2 As shown, Figure 1 This is a schematic diagram of the structure of a new type of hydrophobic coating guide wire; Figure 2 The utility model is a partially enlarged schematic diagram of a guide soft segment core wire of a novel hydrophobic coating guide wire; the utility model is a novel hydrophobic coating long guide wire, comprising a core wire 1, a winding wire 2 and a coating 3,

[0035] In one embodiment, since the friction force of the winding wire 2 itself is relatively large, the coating 3 is coated on the outer surface of the winding wire 2.

[0036] The winding wire 2 is wound around the main hard segment 5 and the guide soft segment 4 of the core wire 1, and its two ends are welded to the core wire 1, and the welding points are hemispherical.

[0037] The coating 3 is coated on the outer surface of the winding wire 2. The coating 3 is a hydrophobic material with a low friction coefficient, which greatly reduces the friction between the guide wire and the tissue, increases the smoothness between the guide wire and the tissue, and reduces damage to the tissue.

[0038] In one embodiment, there is no particular limitation on the material of the coating 3, as long as it is a hydrophobic material that can provide a smooth and slippery effect. For example, the coating material used includes but is not limited to polytetrafluoroethylene or other fluorine-containing hydrophobic polymers.

[0039] In one embodiment, there are multiple coating processes for the outer surface of the winding wire 2. The coating processes used include but are not limited to dipping and spraying.

[0040] In one embodiment, after the outer surface of the winding wire 2 is coated with the coating 3, the friction coefficient between the guide wire and the tissue is greatly reduced due to the hydrophobic property of the material, thereby increasing the smoothness between the guide wire and the tissue and reducing damage to the tissue.

[0041] In one embodiment, the core wire 1 includes a guide soft segment 4 and a main hard segment 5, which are integrated and made of a material with higher hardness, such as stainless steel. This can not only improve the support and pushing rigidity of the guide wire, but also effectively avoid the risk of reversal or folding of the guide wire guide soft segment 4.

[0042] In one embodiment, if Figure 2 As shown, it is a partial enlarged schematic diagram of the structure of the guide soft segment 4. The guide soft segment 4 is made by grinding, and the diameter size of the guide soft segment 4 gradually decreases from the proximal end to the distal end, and the diameter size ranges from φ0.55mm to φ0.145mm, with a good smooth transition.

[0043] In one embodiment, the winding wire 2 is a flat wire or a round wire, the size of the flat wire is 0.255±0.100*0.085±0.020mm; the diameter of the round wire is φ0.10±0.05mm, and the material is stainless steel or nickel-titanium alloy, which increases the overall elasticity and tensile strength of the guide wire.

[0044] In one embodiment, the soft guide segment 4 is about 30 mm long and has a "J" shape at the tip, so that the guide wire has good guiding performance and safety, which can effectively improve the success rate of the guide wire entering the pulmonary vein orifice, thereby improving the efficiency of guiding the ablation catheter to the pulmonary vein orifice. Because the soft guide segment 4 is relatively short, the risk of the guide wire soft segment reversal or folding can be effectively avoided.

[0045] In one embodiment, the winding wire 2 is connected to the proximal end of the main hard segment 5 of the core wire 1 and the end of the guide soft segment 4 by welding. The welding point is hemispherical, with a round and smooth surface and good guiding properties. The guide wire is not easy to damage the blood vessel during puncture.

[0046] In one embodiment, the soft guide segment 4 is about 30 mm long, the tip is "J" shaped, and the total length of the guide wire is about 1.8 m.

[0047] In one embodiment, the soft guide segment 4 is about 30 mm long, the tip of which is "J" shaped, and the total length of the guide wire is about 2.6 m. When the guide sheath and ablation catheter need to be replaced, the guide sheath and ablation catheter can be directly replaced without withdrawing the guide wire, which can greatly improve the efficiency of the operation.

[0048] The above description is only the preferred embodiment of the utility model, which does not limit the protection scope of the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any changes, modifications, substitutions, integrations and parameter changes to these embodiments within the spirit and principle of the utility model through conventional substitutions or capable of achieving the same functions without departing from the principles and spirit of the utility model shall fall within the protection scope of the utility model.

Claims

1. A novel hydrophobic coating long guide wire, characterized in that: Including core wire, winding wire and coating; The core wire comprises a main body hard segment and a guide soft segment, wherein the diameter of the guide soft segment gradually decreases from the proximal end to the end of the guide soft segment, and the diameter of the core wire ranges from φ0.55 mm to φ0.145 mm; The winding wire is wound around the core wire, including the main hard section and the guide soft section; The winding wire is a flat wire or a round wire, the size of the flat wire is 0.255±0.100*0.085±0.020mm; the diameter of the round wire is φ0.10±0.05mm; The coating is applied to the outer surface of the winding wire; The welding points at the end of the guide soft segment and the proximal end of the main body hard segment are both hemispherical; The total length of the guide wire is about 2.6±0.2m, the length of the guide soft section is about 30±10mm, and the end is "J" shaped, which is processed by heat setting.

2. A novel hydrophobic coating long guide wire according to claim 1, characterized in that: The core wire is made of stainless steel, and its main hard section and guide soft section are integrated, and the guide soft section is formed by grinding.

3. A novel hydrophobic coating long guide wire according to claim 1, characterized in that: The winding wire is made of stainless steel or nickel-titanium alloy.

4. A novel hydrophobic coating long guide wire according to claim 1, characterized in that: The proximal end of the main body hard segment of the core wire and the end of the guide soft segment are connected to the winding wire by welding.

5. A novel hydrophobic coating long guide wire according to claim 1, characterized in that: The coating material is polytetrafluoroethylene.

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