Stent, interventional medical device and interventional medical system

Abstract

The present invention provides a stent, an interventional medical device and an interventional medical system. The stent can better assist an intratumoral embolization device, can better adapt to shapes of blood vessels, can also protect branch blood vessels from being blocked by the embolization device, etc. The stent is of a net structure and also comprises a middle bulge part and straight partsat both ends, and a maximum width of the bulge part is larger than the width of the straight parts. The interventional medical device comprises a push rod, an introducing sheath and the stent, one end of the stent is connected with the push rod, and the stent and the push rod are both arranged in the introducing sheath. Besides, the interventional medical system comprises a delivery catheter, anembolization device and the interventional medical device, the stent is used for supporting the embolization device, and the delivery catheter is used for delivering the embolization device and the stent.

Description

technical field [0001] The invention belongs to the field of medical equipment, in particular to a bracket, an interventional medical device and an interventional medical system. Background technique [0002] The vessel wall, especially the arterial vessel wall, is prone to vascular malformation due to local lesions, bulges outward, and forms pathological expansion, which is generally called an aneurysm. Intracranial arteries are the location with high incidence of aneurysms. Intracranial aneurysms are a cerebrovascular disease with high morbidity and disability rates, and are the main cause of subarachnoid hemorrhage. [0003] At present, the use of embolization devices to treat vascular malformations has been generally accepted. The embolization device changes the blood flow in the acute lumen of the vessel, forms an embolus to seal the tumor, controls blood vessel bleeding, prevents blood from flowing into the cavity, and reduces the blood supply of the tumor. Treatment ...

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Problems solved by technology

[0006] However, the existing stents, such as the engraved nickel-titanium stents introduced in U.S. Patent No. 7,695,507 and U.S. Pat. ", or released at the bend to form a "fish scale"-like protrusion, which cannot be well attached to the inner wall of the blood vessel

Furthermore, in the braided nickel-titanium self-expanding stent introduced in U.S. Patent US9439791, the inner wall of the blood vessel can be well attached to the bend of the blood vessel, but the radial support force at the neck of the aneurysm is small, and it is easy to occur in the coil If the stent cannot be opened when it is full, and the doctor needs to push and pull the stent multiple times to adjust the shape of the stent at the neck of the aneurysm, it is easy to cause damage to the inner wall of the blood vessel and cause the formation of thrombus in the artery

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