Cavity guide wire

Abstract

The invention relates to a cavity guide wire, and belongs to the technical field of medical instruments. The cavity guide wire comprises a guide wire far-end and a guide wire near-end; the whole guidewire from the guide wire far-end away from an operator and the guide wire near-end close to the operator is designed into an integral cylindrical structure; a dome-shaped head end is arranged at theend head of the guide wire far-end; and a cavity for enabling the guide wire far-end to have flexibility is arranged in the guide wire far-end, the head end of which is close to one side of the operator. According to the cavity guide wire in the invention, the guide wire far-end and near-end are of an integral structure; the design that a spring is arranged at the conventional guide wire far-end is abandoned; the separation risk of the two due to the fact that the connection strength between the spring of the conventional guide wire far-end and the rod body is insufficient is avoided; simultaneously, the mechanical feedback is good; compared with the near-end, the guide wire far-end is relatively flexible due to the interval cavity structure of the guide wire far-end; the guide wire is uniform in diameter; compared with the conventional guide wire, the torsion control and the supportability are greatly improved; the outer surface of the guide wire is a regular cylinder; and, compared with the conventional guide wire, the friction coefficient is relatively small.

Description

technical field [0001] The invention relates to a cavity guide wire and belongs to the technical field of medical instruments. Background technique [0002] With the continuous progress and development of modern medical technology, various interventional operations including thrombectomy, balloon dilation, thrombus filter, occluder stent implantation, etc. are widely used in the diagnosis and treatment of human diseases. Surgery has the advantages of less trauma and low risk. The guide wire is one of the most commonly used medical devices in interventional surgery. It usually enters the blood vessels of the human body first, and with the assistance of ultrasound, X-ray and other medical imaging technologies, it reaches the target site and establishes an interventional surgical pathway to guide other interventional devices or implants. The implanted device reaches the target site for diagnosis or treatment. The existing conventional guide wire structure generally consists o...

AI Technical Summary

Problems solved by technology

The existing conventional guide wire has the following disadvantages: 1. The guide wire is composed of a rod body and a distal spring, and the strength of the physical connection between the two is limited. , glue bonding and other connection methods introduce materials such as solder and glue, which may cause allergic reactions in patients with specific constitutions; Indirect, and because the spring itself has a certain degree of elasticity, when the distal end of the guide wire touches the blood vessel wall or hardened plaque or thrombus in the blood vessel, the contact force will not be accurately and timely fed back to the proximal end of the guide wire, which is not conducive to the operator's judgment and operation; 3. In order to make the distal end of the guide wire have a certain degree of flexibility, the distal end of the guide wire is usually ground to obtain a smaller diameter than the proximal end, but this will lead to a decrease in the support of the distal end of the guide wire; 4 .The diameter of the distal end of the guide wire after grinding is smaller than that of the proximal end. When the proximal end is rotated during use, the torque cannot be effectively transmitted to the distal end. The rotation of the distal end has a larger lag angle than that of the proximal end. 5. The outer winding spring will make the surface of the distal end of the guide wire uneven, thereby increasing the friction coefficient of the distal end of the guide wire, which may cause damage to the vessel wall during use, and bring unpredictable risks to the patient

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