Intracranial stent and intracranial stent conveying system

Abstract

The invention relates to an intracranial stent and an intracranial stent conveying system. The intracranial stent is formed by weaving developing alloy wires. The intracranial stent comprises a middle part and two end parts, wherein the middle part is of a tubular net-shaped structure; the two end parts are opened outwards, and the maximum diameter of the end parts is larger than the diameter of the middle part; developing marks are arranged at the end parts and are used for positioning the end part positions of the intracranial stent and observing the opening state of the intracranial stent; and the whole body of the intracranial stent is developed, the radial thickness is small, vascular endothelialization is easy, the metal coverage rate is high, and the treatment effect is better. The intracranial stent conveying system comprises a leading-in sheath tube and a conveying guide wire, wherein the conveying guide wire is located in an inner cavity of the leading-in sheath tube and comprises a far end and a near end; and the compressed intracranial stent is connected between the far end and the near end of the conveying guide wire in a sleeved mode, and the intracranial stent is formed by weaving developing metal wires. According to the intracranial stent conveying system, the position of the intracranial stent can be adjusted, operation is easy, and the safety and effectiveness of operation can be remarkably improved.

Description

technical field [0001] The present disclosure relates to the field of medical devices, in particular to an intracranial stent and an intracranial stent delivery system. Background technique [0002] Intracranial aneurysm is a common clinical cerebrovascular disease, mainly manifested as cerebral vasospasm, spontaneous cerebral hemorrhage, oculomotor nerve palsy, etc. It is the primary cause of subarachnoid hemorrhage. With the continuous development of angiography and endovascular embolization technology, endovascular interventional embolization has become the main method for clinical treatment of intracranial aneurysms, but the embolization method and surgical operation are also required. Especially for the embolization treatment of wide-necked aneurysms, embolic devices often fall off and escape, and it is necessary to use intracranial stents to assist the embolism, so as to ensure that the embolic devices are stable in the aneurysm. [0003] The treatment of intracranial...

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Problems solved by technology

[0003] The treatment of intracranial wide-necked aneurysms (capsule-neck ratio4mm) is still challenging. Embolization of coils into wide-necked aneurysms may easily lead to coil prolapse and protrusion during operation, and secondary infarction after operation Higher complications and higher rate of aneurysm recurrence

Due to the large mesh size of the stent used for auxiliary coil embolization in the blood vessel, it is easy to cause the coil to protrude and protrude during the operation, and the postoperative complications are still high.

Currently commonly used intracranial stents have disadvantages such as low metal coverage, which leads to insignificant blood flow guiding effect of the stent, and there is still a certain rate of aneurysm recurrence after the treatment of wide-necked aneurysms.

Currently commonly used intracranial stents do not achieve whole-body visualization, only point-like visualization at both ends of the stent or double-helix linear visualization in the whole body of the stent. The intraoperative visualization effect is not good, and the overall image of the stent during operation cannot be fully observed. Placement details and treatment effect, there are situations where the stent is not well adhered to the wall but cannot be observed, resulting in poor treatment effect

Most of the existing intracranial stent products cannot recover the stent after part of the stent is released, so the doctor cannot adjust the position of the stent relative to the aneurysm during the operation, and even the wrong position of the stent cannot be rescued, resulting in some serious medical incidents

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