Spring guide wire
The spring guide wire design addresses the high cost and complexity of polyurethane guide wires by integrating metal components with a flexible metal ball head and simplified manufacturing, reducing costs and improving navigation through bodily cavities.
Patent Information
- Application Number
- CN202323416363.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-14
AI Technical Summary
Existing guide wires made of black polyurethane have limited raw material suppliers, high costs, and complex manufacturing processes, and their heads lack flexibility and stability when navigating through bodily cavities.
A spring guide wire design featuring a metal ball head, metal core shaft, metal spring, and polymer sleeve, where the metal parts are integrated with the ball head connected to the core shaft and the spring fixed to the shaft's outer wall, and the sleeve is heat-shrunk on the body, using less polymer material and simpler processing.
Reduces production costs, enhances flexibility and stability by allowing the metal ball head to adjust direction easily through turns, and prevents the spring from detaching, while maintaining simplicity in manufacturing.
Smart Images
Figure CN222172843U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a spring guide wire. Background Art
[0002] The role of guidewires in medical surgery is usually to assist the advancement and correct positioning of catheters and other medical devices in the body cavity and guide them to the location of the lesion.
[0003] In addition, when an endoscope is used to observe or treat a biological lumen, a guide wire is also used to guide the catheter inserted into the lumen of the endoscope to the target site of the biological lumen, etc. When inserting a catheter into a cavity, a guide wire is used. First, the guide wire is inserted into the cavity, and then the catheter is advanced along the guide wire, so that the guide wire can guide the catheter to the lesion.
[0004] The guide heads of existing guide wires are mostly made of black polyurethane, which are called "hybrid guide wires", but they have disadvantages such as few raw material suppliers, high costs, and complex processes. Utility Model Content
[0005] In order to solve the above problems, the utility model provides a spring guide wire, including a metal ball head, a metal core shaft, a metal spring and a polymer sleeve, the metal core shaft includes a head and a body which are integrally arranged, the metal ball head is integrally arranged at the head end of the head, the metal spring is fixedly sleeved on the outer wall of the head; the polymer sleeve is heat-shrunk on the body.
[0006] Preferably, the metal spring is fixed to the outer wall of the head by glue, the front end of the metal spring abuts against the end of the metal ball head, and the rear end abuts against the end of the polymer sleeve.
[0007] Preferably, the outer diameter of the metal ball head is larger than the outer diameter of the metal spring and smaller than the maximum outer diameter of the guide wire.
[0008] Preferably, the metal spring is straight or curved.
[0009] Preferably, the metal spring accounts for 3%-4% of the total length of the guide wire.
[0010] Preferably, the metal spring is made of stainless steel or tungsten wire.
[0011] Preferably, the metal spring is formed by winding a metal round wire or a metal flat wire.
[0012] Preferably, the surface of the metal ball head is smooth.
[0013] Preferably, the guidewire is a zebra guidewire.
[0014] Compared with the prior art, the utility model has the following technical effects:
[0015] 1. The guide wire provided by the utility model is coated with polymer material only on the body of the metal mandrel, and the other parts are all made of metal. Therefore, the polymer material used is less than that of the existing polyurethane-based guide wire, thereby reducing the production cost. In addition, the ball head and the metal mandrel are connected in one piece, the metal spring is fixed to the outer wall of the head of the metal mandrel by glue or other fixing methods, and the polymer sleeve is heat-shrunk on the body of the metal mandrel. Therefore, the processing technology of the guide wire is simple.
[0016] 2. The tip of the guide wire is equipped with a metal ball head with a smooth surface. When encountering turns in the cavity or stone obstruction, the smooth metal ball head can easily and flexibly adjust the direction of travel.
[0017] 3. The outer diameter of the metal ball head is larger than the outer diameter of the metal spring, which can block the metal spring and prevent it from falling off.
[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0020] Figure 1 It is a structural schematic diagram of a spring guide wire provided in one embodiment of the utility model. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] The technical solution of the utility model is described in detail below with specific embodiments.
[0023] Please refer to Figure 1 , a spring guide wire, comprising a metal ball head 1, a metal core shaft 2, a metal spring 3 and a polymer sleeve 4:
[0024] The metal core shaft 2 provides supporting force and includes a head 21 and a body 22 that are integrally arranged.
[0025] The metal ball head 1 is made of the same material as the metal core shaft 2, and the metal ball head 1 is integrally arranged at the head end of the head 21. The surface of the metal ball head 1 is smooth, and when encountering a turn in the cavity or a stone obstruction, the smooth metal ball head 1 can easily and flexibly adjust the direction of travel.
[0026] The metal spring 3 is sleeved on the outer wall of the head 21 by means of glue or other fixing methods, in order to increase the elasticity and flexibility of the guide wire head 21 and to provide elastic buffer protection for the inner wall of the cavity. The front end of the metal spring 3 abuts against the metal ball head 1, and the rear end abuts against the polymer sleeve 4, in order to ensure that the spring has the ability of elastic buffering.
[0027] The metal spring 3 can be straight or curved, and different shapes can be selected according to different surgical requirements.
[0028] The metal spring 3 accounts for 3%-4% of the total length of the guide wire. The metal spring 3 is made of stainless steel or tungsten wire, and can be wound by metal round wire or metal flat wire.
[0029] The polymer sleeve 4 is formed by extrusion of a polymer material, and the polymer sleeve 4 is heat-shrunk on the body 22. Since the polymer sleeve 4 is made of a polymer material, it has a rear end flexibility to prevent damage to the endoscope and the like.
[0030] Since polymer materials are well-known and mature materials in the art, this embodiment does not specifically limit this, and the specific polymer materials, such as polytetrafluoroethylene, can be selected based on cost, flexibility, etc., but the utility model is not limited thereto. The spring guide wire provided in this embodiment is a zebra guide wire, and therefore, the polymer sleeve 4 is a zebra sleeve.
[0031] The outer diameter of the metal ball head 1 is larger than the outer diameter of the metal spring 3 and smaller than the maximum outer diameter of the guide wire. The metal ball head 1 can block the metal spring 3 to prevent it from falling off.
[0032] The guide wire provided in this embodiment is coated with polymer material only on the body 22 of the metal core shaft 2, and the other parts are all made of metal material, so less polymer material is used, thereby reducing the production cost. In addition, the ball head and the metal core shaft 2 are connected in one piece, the metal spring 3 is fixed to the outer wall of the head 21 of the metal core shaft 2 by glue or other fixing methods, and the polymer sleeve 4 is heat-shrunk on the body 22 of the metal core shaft 2, so the processing technology is simple.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A spring guide wire, characterized in that: It comprises a metal ball head, a metal core shaft, a metal spring and a polymer sleeve. The metal core shaft comprises an integral head and a body. The metal ball head is integrally arranged at the head end of the head. The metal spring is fixedly sleeved on the outer wall of the head. The polymer sleeve is heat-shrunk on the body.
2. The spring guide wire according to claim 1, characterized in that: The metal spring is fixed on the outer wall of the head by glue, the front end of the metal spring abuts against the end of the metal ball head, and the rear end abuts against the end of the polymer sleeve.
3. The spring guide wire according to claim 1, characterized in that: The outer diameter of the metal ball head is greater than the outer diameter of the metal spring and smaller than the maximum outer diameter of the guide wire.
4. The spring guide wire according to claim 1, characterized in that: The metal spring is straight or curved.
5. The spring guide wire according to claim 1, characterized in that: The metal spring accounts for 3%-4% of the total length of the guide wire.
6. The spring guide wire according to claim 1, characterized in that: The metal spring is made of stainless steel or tungsten wire.
7. The spring guide wire according to claim 1, characterized in that: The metal spring is formed by winding metal round wire or metal flat wire.
8. The spring guide wire according to claim 1, characterized in that: The surface of the metal ball head is smooth.
9. The spring guide wire according to claim 1, characterized in that: The guide wire is a zebra guide wire.
10. The spring guide wire according to claim 1, characterized in that: The material of the polymer sleeve is polytetrafluoroethylene.