CN-121987278-A - Embolic coil system

CN121987278ACN 121987278 ACN121987278 ACN 121987278ACN-121987278-A

Abstract

The invention provides an embolic coil system which comprises a conveying device and a spring coil device, wherein the conveying device comprises a conveying pipe and a guide wire arranged in the conveying pipe, the conveying pipe is provided with a cavity, the cavity comprises a first cavity and a second cavity positioned at the far end of the first cavity, the second cavity is provided with a separation part for separating the first cavity into a first channel and a second channel, the spring coil device comprises a spring coil and an anti-unwinding wire arranged in the spring coil, the far end of the anti-unwinding wire is fixedly connected with the far end of the spring coil, the near end of the anti-unwinding wire is provided with a rope sleeve, the rope sleeve penetrates through the first channel and stretches into the first cavity, and the guide wire sequentially penetrates through the rope sleeve and the second channel. According to the invention, the rope sleeve of the anti-unwinding wire passes through the first channel and is sleeved on the guide wire, so that the stable connection between the conveying device and the spring ring device is realized, the locking state can be maintained even when the conveying device passes through a bent blood vessel, the situation of false release is avoided, the operation risk and the operation difficulty are reduced, and meanwhile, the reliable release of the spring ring can be realized through the arrangement of the anti-unwinding wire.

Inventors

CHEN XIRUN
WANG GAOBO
CHEN WENZHAO

Assignees

聚辉医疗科技(深圳)有限公司

Dates

Publication Date: 20260508
Application Date: 20260317
Priority Date: 20251201

Claims (10)

1. An embolic coil system, comprising: The conveying device comprises a conveying pipe and a guide wire arranged in the conveying pipe, wherein the conveying pipe is provided with a cavity, the cavity comprises a first cavity and a second cavity positioned at the far end of the first cavity, and the second cavity is provided with a separation part for separating the first cavity into a first channel and a second channel; The spring ring device comprises a spring ring and an anti-unwinding wire arranged in the spring ring, wherein the distal end of the anti-unwinding wire is fixedly connected with the distal end of the spring ring, a rope sleeve is arranged at the proximal end of the anti-unwinding wire, the rope sleeve penetrates through the first channel and stretches into the first cavity, and the guide wire sequentially penetrates through the rope sleeve and the second channel.
2. The embolic coil system of claim 1, wherein the delivery tube comprises a distally located spring tube comprising the second lumen.
3. The embolic coil system of claim 2, wherein the delivery tube further comprises a metal tube at the proximal end, the distal end of the metal tube being fixedly attached to the proximal end of the spring tube.
4. The embolic coil system of claim 3, wherein the guidewire comprises a woven mesh tube, a core wire disposed at and fixedly connected to a distal end of the woven mesh tube, an outer surface of the distal end of the woven mesh tube abutting an inner surface of the spring tube, the core wire passing sequentially through the sheath and the second channel.
5. The embolic coil system of claim 4, wherein the delivery device further comprises a heat shrink tube that is sleeved over an outer circumferential surface of the metal tube and/or the spring tube.
6. The embolic coil system of claim 5, wherein the proximal end of the guidewire is fixedly attached to the proximal end of the delivery tube, and/or, The proximal end of the delivery tube is provided with a break-off portion.
7. The embolic coil system of claim 6, wherein the distal end of the spring tube has a pitch greater than the pitch of the proximal end thereof.
8. The embolic coil system of claim 1, wherein the coil device further comprises an anti-unwinding spring disposed within the coil, the anti-unwinding wire comprising a first portion and a second portion, a distal end of the first portion being fixedly connected to a distal end of the coil, a proximal end of the first portion being fixedly connected to a distal end of the anti-unwinding spring, a distal end of the second portion being fixedly connected to a proximal end of the anti-unwinding spring, a proximal end of the second portion being provided with the loop, the anti-unwinding spring being in tension as the guidewire passes through the loop.
9. The embolic coil system of claim 8, wherein the coil device further comprises a stop spring disposed at a proximal end of the coil, the stop spring having a lumen disposed therein, the proximal end of the anti-unwinding wire passing through the lumen.
10. The embolic coil system of claim 9, wherein the distal end of the first portion is provided with a frit secured to the distal end of the coil.

Description

Embolic coil system Technical Field The invention relates to the technical field of medical instruments, in particular to an embolic coil system. Background With changes in people's diet, lifestyle and environment, cardiovascular diseases are also increasing, which include hemangiomas, which are neoplastic projections on blood vessels that can form on arteries, such as aneurysms. Hemangiomas have serious consequences such as rupture of an aneurysm to bleed when the blood pressure of the blood vessel suddenly increases, causing disability and even death of the patient. The existing treatment methods mainly comprise surgical aneurysm clipping operation treatment, intravascular intervention treatment and the like, and along with the development of imaging technology and intravascular materials, the intravascular intervention treatment has lower risk and smaller wound than the surgical operation treatment, and the method replaces the surgical aneurysm clipping operation and becomes the preferred method for treating hemangiomas. The existing vascular interventional therapy method is that a spring ring structure is input into the hemangioma through a conveying system, and because the spring ring occupies a certain space in the hemangioma and stimulates thrombosis in the hemangioma, the purposes of blocking and blocking the hemangioma are achieved, blood in the blood vessel cannot enter the hemangioma, and the blood is prevented from impacting the hemangioma to break the hemangioma, so that a good therapeutic effect is achieved. The conventional embolic coil system mainly comprises a delivery system 200 and an implantable coil 300, as shown in fig. 1, wherein the implantable coil 300 is connected with the delivery system 200 through a mechanical lock, the mechanical lock comprises a mechanical lock 400 (such as a metal ball or a metal ring) arranged at the proximal end of the implantable coil 300, and a release structure 500 (such as a bayonet lock or a claw structure) arranged at the distal end of the delivery system 200, and the mechanical lock 400 is clamped by the release structure 500 during the implantation process of the implantable coil 300 to realize the connection of the delivery system 200 and the implantable coil 300, so as to prevent the detachment of the delivery system 200 and the implantable coil 300, and when the implantable coil 300 is implanted in a hemangioma, the release structure 500 releases the mechanical lock 400 to realize the detachment of the delivery system 200 and the implantable coil 300, so that the implantable coil 300 can stay in the hemangioma. However, when the existing embolic coil system is implanted into the blood vessel 100, the blood vessel 100 after being bent cannot adapt to the deformation amount generated by bending the delivery system 200 due to the release structure 500 of the delivery system 200, so that the embolic coil system is erroneously released from the mechanical locking piece 400, and further implantation failure is caused, so that not only are the operation risks and operation difficulty increased, but also the life and health of a patient are seriously threatened. Disclosure of Invention In view of the shortcomings in the prior art, it is an object of the present invention to provide an embolic coil system. The embolic coil system comprises a conveying device and a coil spring, wherein the conveying device comprises a conveying pipe and a guide wire arranged in the conveying pipe, the conveying pipe is provided with a cavity, the cavity comprises a first cavity and a second cavity positioned at the far end of the first cavity, the second cavity is provided with a separation part for separating the first cavity into a first channel and a second channel, the coil spring device comprises a coil spring and an anti-unwinding wire arranged in the coil spring, the far end of the anti-unwinding wire is fixedly connected with the far end of the coil spring, a rope sleeve is arranged at the near end of the anti-unwinding wire, the rope sleeve penetrates through the first channel and stretches into the first cavity, and the guide wire sequentially penetrates through the rope sleeve and the second channel. Preferably, the delivery tube comprises a spring tube at the distal end, the spring tube comprising the second lumen. Preferably, the delivery tube further comprises a metal tube at the proximal end, and the distal end of the metal tube is fixedly connected with the proximal end of the spring tube. Preferably, the guide wire comprises a woven mesh tube and a core wire arranged at the distal end of the woven mesh tube and fixedly connected with the woven mesh tube, the outer surface of the distal end of the woven mesh tube is abutted to the inner surface of the spring tube, and the core wire sequentially penetrates through the rope sleeve and the second channel. Preferably, the conveying device further comprises a heat shrinkage tube, and the heat shrinkage tube is s