Vascular interventional radiography guide wire and preparation method thereof

Abstract

The invention discloses a vascular interventional radiography guide wire and a preparation method thereof. The vascular interventional radiography guide wire comprises an internal strong developing metal core, a head end internal spring ring sleeve, an external far end spring ring sheath and an external near end polymer sheath, and the surface of the guide wire is coated with a hydrophilic coating. The head end of the radiography guide wire provided by the invention is preformed into a J-shaped elbow, so that the radiography guide wire does not easily enter a branch blood vessel, and the condition that head end of the guide wire damages the inner wall of the blood vessel can be effectively avoided. The J-shaped elbow can adjust the bending shape of the head end when the external far end spring ring sheath is acted by axial extrusion stress until the J-shaped elbow is adjusted to be straight, so that the radiography guide wire can enter a matched instrument conveniently. Due to the design of external far end spring ring sheath, the tactile feedback of an operator is improved. Due to the design of the spring ring sleeve in the head end, the torque transmissibility and safety of the guide wire are improved, and the head end of the radiography guide wire cannot be wound. Besides, the hydrophilic coating on the surface of the radiography guide wire improves the lubricity of the radiography guide wire, so that the radiography guide wire can easily reach a target part in a blood vessel.

Description

technical field [0001] The invention relates to the technical field of medical devices, and more specifically, relates to an angiography guide wire for vascular intervention and a preparation method thereof. Background technique [0002] Coronary artery disease is a common clinical problem in the field of interventional treatment of coronary heart disease. Interventional diagnosis and treatment through guide wire delivery and equipment is one of the rapidly developing treatment methods. [0003] There are two main types of contrast guidewires currently on the market: [0004] The first is that the core of the guide wire is nickel-titanium alloy, the outer layer of the guide wire is a polymer sheath, the tip of the guide wire is bent into a J-shaped bend, and the surface of the guide wire is provided with a hydrophilic coating. The tip structure of the guide wire is a polymer and core integrated design. When the guide wire enters the sheath, contrast catheter or other matchi...

AI Technical Summary

Problems solved by technology

[0004] The first is that the core of the guide wire is nickel-titanium alloy, the outer layer of the guide wire is a polymer sheath, the tip of the guide wire is bent into a J-shaped bend, and the surface of the guide wire is provided with a hydrophilic coating. The tip structure of the guide wire is a polymer and core integrated design. When the guide wire enters the sheath, contrast catheter or other matching devices, a guide wire guide is needed, which is inconvenient to operate and prolongs the operation time

[0005] The second is that the core of the guide wire is made of stainless steel, the outer layer of the guide wire is a spring coil sheath, the surface of the guide wire is made of PTFE hydrophobic coating, and the end of the guide wire is bent into a J-shaped bend. In clinical application, the outer layer of the guide wire The design of the spring coil and the PTFE hydrophobic coating on the surface makes the friction resistance of the guide wire relatively large when it reaches the target site in the blood vessel or transports other matching devices, and the lubricity of the guide wire is not enough and the handling is poor. In addition, because the outer layer of the entire guide wire is made of The spring coil sheath is wrapped, and there is a gap of a certain width between the spring wire diameters, and the guide wire enters the blood vessel to easily form thrombosis and other complications

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