Mixed guide wire for surgical interventional operation
By designing a multi-segment hybrid guidewire, combining stainless steel and nickel-titanium alloy materials with a hydrophilic and hydrophobic coating, the problems of insufficient guidewire support and complex operation were solved, achieving efficient insertion and simplified operation in different interventional treatment scenarios.
Patent Information
- Application Number
- CN202423151759.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing hybrid guidewires lack sufficient support when dealing with severely calcified lesions or severe angulation, making insertion difficult. Furthermore, different guidewires need to be frequently changed during the same procedure, complicating the operation and increasing patient discomfort.
A hybrid guidewire is designed, comprising a core wire and a spring sheath. The core wire is divided into multiple segments, combining different materials and coating properties to suit different interventional treatment scenarios, enhancing support and flexibility. It uses stainless steel and nickel-titanium alloy materials, combined with hydrophilic and hydrophobic coatings to improve the guidewire's support and sliding properties.
When overcoming severe calcified or tortuous lesions, the guidewire can provide sufficient support, reduce prolapse, simplify the procedure, improve surgical efficiency, and reduce patient suffering.
Smart Images
Figure CN223944759U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of medical apparatus and instruments, especially to a mixed guide wire for surgical intervention operation. BACKGROUND
[0002] In modern urological surgery, especially minimally invasive surgery involving stone treatment, such as ureteroscopy and percutaneous nephrolithotomy. In order to guide the catheter to the target site of the body lumen, a guide wire can be used. The role of the guide wire in medical surgery is usually to assist the advancement and correct positioning of the catheter and other medical devices in the body cavity, and to guide the passage of catheters, stents and other instruments in blood vessels or other cavities.
[0003] Common guide wire types include loach guide wire, zebra guide wire and mixed guide wire. The loach guide wire is composed of a nickel-titanium alloy core wire, an outer coating layer of polyurethane material and a hydrophilic polymer. Under the activation of water, the surface of the guide wire is as smooth as the surface of a loach. The zebra guide wire is a flexible nickel-titanium alloy core wire coated with a layer of hydrophobic, special double-color PTFE (polytetrafluoroethylene) film, which has a "zebra stripe" appearance that is clearly visible under X-ray. The mixed guide wire has mixed properties on both the core wire and the coating. The core wire is usually a mixture of a nickel-titanium inner core and a 304 stainless steel wire, and the head has a hydrophilic coating while the rear has a PTFE coating.
[0004] However, the mixed guide wire on the market currently faces the following problems: in the case of severe calcification lesions or severe angulation that need to overcome greater resistance, the support is insufficient. If the guide wire core taper is increased to increase the support, the head will easily prolapse. Secondly, in the same operation, the super-smooth and soft head needs to be introduced into the tortuous lesion or curved cavity. At this time, the operator needs to constantly switch different guide wires, which is complex and increases the patient's pain. UTILITY MODEL CONTENTS
[0005] (I) Technical problem to be solved
[0006] The utility model provides a kind of mixed guide wire for surgical intervention operation, to solve the problem of insufficient support in the process of guide wire introduction in the case of large resistance intervention treatment and the problem of low efficiency caused by frequent replacement of different guide wires in operation.
[0007] (II) Technical scheme
[0008] In order to achieve the above purpose, the utility model provides a kind of mixed guide wire for surgical intervention operation, including core wire, spring sheath and polymer sheath;
[0009] The core wire is provided with a first body and a second body connected with each other, a first tapered section connected with the distal end of the first body, and a second tapered section connected with the distal end of the second body, wherein the taper of the first tapered section is greater than the taper of the second tapered section, the length of the taper of the first tapered section is smaller than the length of the taper of the second tapered section, the distal end of the first tapered section is provided with a first cylindrical section, and the distal end of the second tapered section is provided with a second cylindrical section. The spring-wound sheath comprises a first spring-wound spring wound around the first body and a second spring-wound spring wound around the first tapered section and the first cylindrical section.
[0010] Further, the outer side of the polymer sheath is uniformly provided with a coating layer, the sheath comprises a first sheath and a second sheath, the first sheath is sleeved on the outer side of the second spring-wound spring, and the second sheath is sleeved on the second body, the second tapered section and the second cylindrical section.
[0011] Further, the coating layer provided on the outer side of the first sheath is a hydrophobic coating layer, and the coating layer provided on the outer side of the second sheath is a hydrophilic coating layer.
[0012] Further, the hydrophilic coating layer is selected from any one of a polyvinylpyrrolidone coating layer, a polyacrylamide coating layer and a parylene coating layer; and the hydrophobic coating layer is selected from any one of a polytetrafluoroethylene coating layer and a polyurethane acrylic coating layer.
[0013] Further, one end of the second spring-wound spring abuts against the taper surface of the first tapered section, and the other end abuts against the first sheath.
[0014] Further, the first spring-wound spring is a flat wire spring-wound spring, the second spring-wound spring is a round wire spring-wound spring, and the inner diameter of the first spring-wound spring is greater than the inner diameter of the second spring-wound spring.
[0015] Further, the distal end of the first cylindrical section has a first head, and the distal end of the second cylindrical section has a second head, and the first head and the second head are both hemispherical structures.
[0016] Further, the first sheath and the second sheath are both sleeve structures with one end open, the closed end of the first sheath wraps the first head, and the closed end of the second sheath wraps the second head.
[0017] Further, the radial length of the first cylindrical section is 1 / 4-1 / 3 of the radial length of the first body, and the radial length of the second cylindrical section is 1 / 4-1 / 3 of the radial length of the second body.
[0018] Further technical solutions are that the mixed guide wire is applied to an intervention surgery of urology surgery.
[0019] (III) Beneficial effects
[0020] The core wire is divided into six sections, i.e., a first body, a second body, a first tapered section, a second tapered section, a first cylindrical section and a second cylindrical section. The first part composed of the first body, the first tapered section and the first cylindrical section and the second part composed of the second body, the second tapered section and the second cylindrical section are respectively suitable for different use scenarios. The first part is used in the intervention treatment of severe calcification lesions or severe angulation and other situations requiring overcoming large resistance. The taper of the first tapered section in the first part is large, and the corresponding tapered part is short. The distal end support of the first cylindrical section connected to the first tapered section is insufficient, especially in cooperation with a large pushing force, which is prone to cause the guide wire head prolapse problem. Therefore, the second coiled spring is arranged on the first tapered section, which can effectively enhance the distal end support of the first tapered section and improve the push force that can be borne. Meanwhile, the first coiled spring is arranged on the first body, thereby enhancing the overall support and pushing performance. The second part is used in the intervention treatment of tortuous lesions or curved cavities. The taper of the second tapered section in the second part is small and the tapered part is long, which has a certain distal end support and is more suitable for situations requiring less support and higher flexibility. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 FIG. 1 is a schematic diagram of the overall cross section of the mixed guide wire for surgical intervention;
[0022] Figure 2 FIG. 2 is a schematic diagram of the structure of the core wire in the mixed guide wire; Figure 1
[0023] FIG. 3 is an enlarged schematic diagram of A in FIG. 2; Figure 3 Figure 1 FIG. 4 is an enlarged schematic diagram of B in FIG. 2;
[0024] Figure 4 Figure 1 FIG. 5 is an enlarged schematic diagram of C in FIG. 2.
[0025] Figure 5 FIG. 6 is an enlarged schematic diagram of D in FIG. 2. Figure 1
[0026]
Explanation of reference signs
[0027] 1: core wire; 11: first body; 12: second body; 13: first tapered section; 14: second tapered section; 15: first cylindrical section; 151: first head; 16: second cylindrical section; 161: second head; 2: spring sheath; 21: first spring; 22: second spring; 3: polymer sheath; 31: first sheath; 32: second sheath; 4: coating; 5: limiting structure. DETAILED DESCRIPTION
[0028] In order to better explain the utility model, so as to facilitate understanding, the following will be combined with the drawings, through specific embodiments, the utility model is described in detail.
[0029] The embodiment provides a mixed guide wire for surgical intervention operation, as shown in Figure 1 and Figure 2 It comprises a core wire 1, a spring sheath 2 and a polymer sheath 3. The core wire 1 is provided with a first body 11 and a second body 12 connected with each other, a first tapered section 13 connected with the distal end of the first body 11, a second tapered section 14 connected with the distal end of the second body 12, the taper of the first tapered section 13 is greater than the taper of the second tapered section 14, the taper length of the first tapered section 13 is less than the taper length of the second tapered section 14, the distal end of the first tapered section 13 is provided with a first cylindrical section 15, and the distal end of the second tapered section 14 is provided with a second cylindrical section 16. The spring sheath 2 comprises a first spring 21 wound on the first body 11 and a second spring 22 wound on the first tapered section 13 and the first cylindrical section 15.
[0030] It should be noted here that the two ends of the distal guide wire, specifically, the end of the guide wire away from the surgical operator during operation, that is, the end of the guide wire entering the human body.
[0031] The first tapered section 13 has a larger taper, and the corresponding taper part is shorter. In the case of intervention treatment of severe calcification lesions or severe angulation and other conditions that need to overcome greater resistance, the distal end support of the first cylindrical section 15 connected with the first tapered section 13 is insufficient, especially when cooperating with a larger pushing force, the guide wire head is prone to prolapse. Therefore, the second spring 22 is arranged on the first tapered section 13 and the first cylindrical section 15, which can effectively enhance the distal end support of the first cylindrical section 15 and improve the pushing force that can be resisted. At the same time, the first spring 21 is arranged to increase the support of the first body 11. The second tapered section 14 has a smaller taper, which can also be designed as a streamline, and the second cylindrical section 16 connected with the second tapered section 14 has a certain distal end support, which is more suitable for intervention treatment of tortuous lesions or curved cavities with higher flexibility requirements and less support requirements. Clinically, doctors can choose which end to use according to different requirements of flexibility, support, tracking and the like of the guide wire.
[0032] Specifically, the core wire 1 is made of stainless steel and nickel-titanium alloy, the stainless steel has good support, pushing force and torque control, and is used to make the first body 11 in the embodiment; the nickel-titanium alloy has the characteristics of shape memory and super elasticity, good flexibility and durability, and is used to make the second body 12 in the embodiment. Of course, the core wire 1 can also be made of a whole stainless steel or nickel-titanium alloy.
[0033] It should be noted that the second coiled spring 22 does not surround the whole first tapered section 13, and in the embodiment, the second coiled spring 22 is provided with a section on the first tapered section 13. The main purpose is to strengthen the support of the distal first cylindrical section 15.
[0034] Specifically, in the embodiment, the outer side of the polymer sheath 3 is uniformly provided with a coating layer 4, and the polymer sheath 3 includes a first sheath 31 and a second sheath 32; the first sheath 31 is sleeved on the outer side of the second coiled spring 22, and it should be noted that the first sheath 31 is connected to the end of the first coiled spring 21 close to the second coiled spring 22, and the specific setting method is a heat shrink method. The second sheath 32 is sleeved on the second body 12, the second tapered section 14 and the second cylindrical section 16, and is also set by a heat shrink method.
[0035] In the embodiment, the outer side of the first sheath 31 is provided with a hydrophobic coating, and the outer side of the second sheath 32 is provided with a hydrophilic coating. The hydrophilic coating is a coating that enhances the hydrophilicity of the surface, which is made of a polymer material and contains a hydrophilic group, allowing water to spread on the surface in a thin film rather than droplets; the hydrophilic group absorbs water to form a hydration layer, giving the coating hydrophilicity and super lubricity, significantly reducing friction, preventing bacterial growth, reducing the risk of infectious diseases, and improving lubricity. The hydrophobic coating refers to a coating with a static water contact angle greater than 90° on the coating film surface, which can repel water and effectively prevent the adhesion of plasma proteins and platelets in blood, forming a wax-like surface on the guide wire, reducing friction, and improving passability and tracking.
[0036] Specifically, the hydrophilic coating is selected from any one of a polyvinylpyrrolidone coating, a polyacrylamide coating, and a parylene coating; in the embodiment, a polyvinylpyrrolidone (PVP) coating is selected; the hydrophobic coating is selected from any one of a polytetrafluoroethylene coating and a polyurethane acrylic coating, and in the embodiment, a polytetrafluoroethylene (PTFE) coating is selected.
[0037] Specifically, in the embodiment, the first coiled spring 21 is a flat wire coiled spring, which has better support effect than a round wire coiled spring; the second coiled spring 22 is a round wire coiled spring, and the inner diameter of the first coiled spring 21 is greater than that of the second coiled spring 22. The outer side of the first coiled spring 21 can be sprayed with the above-mentioned hydrophobic coating for treatment to enhance its biocompatibility, passability and tracking.
[0038] Specifically, in the embodiment, the end of the first cylindrical segment 15 has a first head 151, and the end of the second cylindrical segment 16 has a second head 161. Both the first head 151 and the second head 161 are in a hemispherical structure. The hemispherical structure is mainly used to reduce the pressure on the polymer sheath 3, and it is also more conducive to the sliding of the guide wire in the human body.
[0039] In the embodiment, both the first sheath 31 and the second sheath 32 are in a sleeve structure with one end open. The closed end of the first sheath 31 wraps the first head 151, and the closed end of the second sheath 32 wraps the second head 161.
[0040] In summary, the core wire 1 is composed of the first main body 11, the second main body 12, the first tapered segment 13, the second tapered segment 14, the first cylindrical segment 15, and the second cylindrical segment 16. The radial length of the first cylindrical segment 15 is 1 / 4-1 / 3 of the radial length of the first main body 11, and in the embodiment, it is 1 / 3. The radial length of the second cylindrical segment 16 is 1 / 4-1 / 3 of the radial length of the second main body 12, and in the embodiment, it is 1 / 3. The application process of the hybrid guide wire for surgical intervention as described in the embodiment is as follows:
[0041] In urological surgery, the doctor will select the appropriate end for operation according to the tortuosity and angle of the target site of the patient's body lumen. Specifically, in the case of severe calcification lesions or severe angulation that needs to overcome greater resistance, a stainless steel with a coiled spring segment can be directly selected for treatment; in the case of needing to introduce a tortuous lesion or a curved lumen, a nickel-titanium alloy segment with better flexibility and tracking performance can be directly selected for treatment.
[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiment are only used to explain the relative positional relationship and movement between the components in a certain posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.
[0043] In addition, the descriptions such as "first", "second" and the like in the embodiment are only for descriptive purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the embodiment, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0044] In this embodiment, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this embodiment can be understood according to the specific circumstances.
[0045] It should be understood that the above description of specific embodiments of the utility model is only for the purpose of illustrating the technical route and characteristics of the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and to implement it, but the utility model is not limited to the above specific implementation. Any changes or modifications made within the scope of the claims of the utility model should be covered within the protection scope of the utility model.
Claims
1. A hybrid guide wire for use in a surgical intervention procedure, characterized in that, The core wire (1), the spring-wound sheath (2) and the polymer sheath (3); The core wire (1) is provided with a first body (11) and a second body (12) connected to each other, a first tapered section (13) connected to the distal end of the first body (11), and a second tapered section (14) connected to the distal end of the second body (12); The taper of the first tapered section (13) is greater than the taper of the second tapered section (14), the length of the taper of the first tapered section (13) is less than the length of the taper of the second tapered section (14), the distal end of the first tapered section (13) is provided with a first cylindrical section (15), and the distal end of the second tapered section (14) is provided with a second cylindrical section (16); The spring-wound sheath (2) comprises a first spring-wound (21) wound on the first body (11) and a second spring-wound (22) wound on the first tapered section (13) and the first cylindrical section (15).
2. The hybrid guide wire for surgical intervention procedures of claim 1, wherein, The outer side of the polymer sheath (3) is uniformly provided with a coating layer (4), and the polymer sheath (3) comprises a first sheath (31) and a second sheath (32); The first sheath (31) is sleeved on the outer side of the second spring-wound (22); The second sheath (32) is sleeved on the second body (12), the second tapered section (14) and the second cylindrical section (16).
3. The hybrid guide wire for surgical intervention according to claim 2, wherein The coating layer (4) provided on the outer side of the first sheath (31) is a hydrophobic coating layer, and the coating layer (4) provided on the outer side of the second sheath (32) is a hydrophilic coating layer.
4. The hybrid guide wire for surgical intervention procedures of claim 3, wherein, The hydrophilic coating layer is selected from any one of a polyvinylpyrrolidone coating layer, a polyacrylamide coating layer and a parylene coating layer; and the hydrophobic coating layer is selected from any one of a polytetrafluoroethylene coating layer and a polyurethane acrylic coating layer.
5. The hybrid guide wire for surgical intervention procedures of claim 2, wherein, One end of the second spring-wound (22) abuts against the tapered surface of the first tapered section (13), and the other end abuts against the first sheath (31).
6. The hybrid guide wire for surgical intervention according to claim 2, wherein The first spring-wound (21) is a flat wire spring-wound, the second spring-wound (22) is a round wire spring-wound, and the inner diameter of the first spring-wound (21) is greater than the inner diameter of the second spring-wound (22).
7. The hybrid guide wire for surgical intervention procedures as defined in claim 6, wherein, The distal end of the first cylindrical section (15) has a first head (151), and the distal end of the second cylindrical section (16) has a second head (161), and the first head (151) and the second head (161) are both hemispherical structures.
8. The hybrid guide wire for surgical intervention procedures of claim 7, wherein, The first sheath (31) and the second sheath (32) are both sleeve-like structures with one end open, the closed end of the first sheath (31) wraps the first head (151), and the closed end of the second sheath (32) wraps the second head (161).
9. The hybrid guide wire for surgical intervention procedures of claim 1, wherein, The radial length of the first cylindrical section (15) is 1 / 4-1 / 3 of the radial length of the first body (11), and the radial length of the second cylindrical section (16) is 1 / 4-1 / 3 of the radial length of the second body (12).
10. The hybrid guide wire for surgical intervention procedures of claim 1, wherein, The mixed guide wire is applied to the interventional operation of urology surgery. The core wire (1) is composed of a first main body (11), a second main body (12), a first tapered section (13), a second tapered section (14), a first cylindrical section (15) and a second cylindrical section (16).