Electronic detaching and etching covered stent for treatment of intracranial aneurysm and operation method thereof

Abstract

The invention discloses an electronic detaching and etching covered stent for the treatment of intracranial aneurysm. The electronic detaching and etching covered stent comprises a stent main body with a cylindrical net structure, wherein the surface of the stent middle segment of the stent main body is packaged with a plastic cover, and one end of the stent main body is also connected with a push device; the push device comprises a guide wire and a delivery guide tube arranged on the guide wire in a sleeving manner, and the front end of the guide wire is welded at one end of the stent main body with thermal fusing metal. The electronic detaching and etching covered stent can enable intracranial aneurysm haemodynamics to change, promote thrombogenesis and thrombus organization in aneurysm, achieve the purpose of anatomically reconstructing parent artery, and keep the parent artery and branches unobstructed. The electronic detaching and etching covered stent has the advantages of being simple in structure, easy to operate, precise in positioning, high in safety and total obliteration rate and low in recurrence rate and can be recycled, so that the surgery cost is reduced.

Description

technical field [0001] The invention relates to the field of covered stents, in particular to an electrolytic deetching covered stent for treating intracranial aneurysms and an operating method thereof. Background technique [0002] Intracranial aneurysm is an abnormal protrusion of intracranial aneurysm wall. Rupture of intracranial aneurysm is the main cause of spontaneous subarachnoid hemorrhage, the prognosis of patients with spontaneous subarachnoid hemorrhage is poor, the overall mortality rate is 25%, and the disability rate of survivors is close to 50%. [0003] At present, the treatment methods for intracranial aneurysms mainly include craniotomy to clamp the aneurysm neck and endovascular interventional therapy. Craniotomy to clamp the neck of the aneurysm is difficult and causes great trauma to the patient; endovascular interventional therapy is relatively less difficult and causes less trauma to the patient. Because endovascular interventional treatment of ...

AI Technical Summary

Problems solved by technology

However, coil embolization of intracranial aneurysms is difficult to achieve dense packing of aneurysms, especially for wide-necked, fusiform, and large / giant aneurysms, which may easily cause aneurysm recurrence; balloon-assisted coil technology cannot solve all wide-necked aneurysms. For carotid aneurysm embolization, it is usually required that the ratio of the aneurysm cavity to the aneurysm neck is greater than 1:1, and the aneurysm neck is less than 4mm; the stent-assisted coil technology increases the difficulty of placing the microcatheter in place due to the limitation of the stent, and also provides a guarantee for the dense packing of the aneurysm. The main reason is that the position of the microcatheter passing through the mesh of the stent cannot be adjusted arbitrarily, and there is an embolization dead angle leading to septal packing; after embolization of the aneurysm with balloon-assisted ONYX embolization, the mass effect is usually not relieved, and it will be aggravated After embolization of fusiform or wide-necked aneurysms with ONYX, the exposed ONYX area is larger, and the probability of thrombus formation is significantly increased. Spontaneous parent artery occlusion and distal thromboembolism may occur. In addition, ONYX sometimes leaks, blocks Perforating vessels or distal branches along the way

[0005] Most of the existing covered stents use balloon expansion, which has poor accuracy and weak ability to pass through the lesion area. Moreover, due to the effect of the aneurysm neck, the diameter of the artery at this position becomes smaller, which increases the passage of the balloon. The difficulty of the balloon expansion is not in place, so the stent cannot be completely released and adhered to the wall, which directly affects the success of the operation.

In addition, the placement of the existing covered stents is all one-time. If the position is improperly placed, only one can be placed again, and the original covered stent can only be discarded, which will increase the cost of the operation and waste resources.

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