Covered stent

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a covered stent. The covered stent comprises a stent body and a filter membrane; the stent body is provided with a near end and a far end, and the near end is used for being arranged on the upstream of a blood vessel relative to the far end. The filter membrane is provided with a mounting part and a dissociation part, the mounting part is connected to the stent body, and the dissociation part is connected with the mounting part and dissociates from the stent body. After the stent body is installedat a Y-shaped bifurcation of a carotid artery, the stent body is opened, the filter membrane is opened along with the stent body, and the filter membrane covers plaques in blood vessels, so that the plaques can be prevented from being broken and falling off due to extrusion of the stent body. Besides, after the stent body is installed on the common carotid artery and the internal carotid artery, blood flow entering the external carotid artery from the common carotid artery easily rushes through the filter membrane located at the entrance of the external carotid artery, and therefore it is guaranteed that the blood normally enters the external carotid artery. Compared with the prior art, the covered stent is better in use safety.

Description

technical field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a covered stent. Background technique

[0002] Cerebrovascular disease is a major disease that threatens human health today, and is the third leading cause of death after cardiovascular disease and tumors. Among them, 25% of ischemic strokes are related to carotid artery stenosis or occlusion.

[0003] The treatment of carotid artery stenosis is mainly divided into drug therapy, carotid endarterectomy, and carotid artery stenting. Among them, carotid artery stenting has the advantages of simple operation, less trauma, and fewer complications, and is currently one of the effective methods for treating carotid artery stenosis.

[0004] The carotid artery is divided into the common carotid artery, the external carotid artery and the internal carotid artery. The common carotid artery, the external carotid artery and the internal carotid artery have a Y-shaped bif...

Images