Endoluminal stent

Abstract

The invention discloses a luminal stent, which comprises a tubular main body, two inner branches and two outer branches respectively communicated with the tubular main body, and a developing mark for positioning the inner branches and the outer branches. The tubular main body includes a first main body section, a tapered section and a second main body section connected in sequence, the distal end of the inner branch is connected to the tapered section, and the proximal end of the outer branch is connected to the tapered section. One of the inner branches is located between the two outer branches, the angle between the inner branch and the adjacent outer branch along the circumferential direction is 60°-80°, and the angle between the two outer branches along the circumferential direction The included angle is 170°~180°. The beneficial effects of the present invention: by rationally designing the position between the inner branch and the outer branch, the interference of the development marks between the four branches can be effectively avoided, and the interference of the extended brackets socketed on the four branches can be avoided.

Description

technical field [0001] The invention relates to the technical field of interventional medical devices, in particular to a lumen stent. Background technique [0002] In the past ten years, endovascular exclusion of aortic stent grafts has been widely used in thoracic and abdominal aortic aneurysms and arterial dissections. treatment method. During the operation, under X-ray fluoroscopy monitoring, the covered stent is sent to the lesion through the corresponding delivery system. The covered stent isolates the blood flow from the lesion, eliminates the influence of blood pressure on the lesion, and achieves the purpose of healing. [0003] However, the vascular structure of the human body is complex, and there are many side branches. At the same time, individual patients are different. The length of the tumor may be very long, and the location of the tumor may also vary greatly. The situation near the branch is also more common. If the release position of the covered stent i...

AI Technical Summary

Problems solved by technology

[0003] However, the vascular structure of the human body is complex, and there are many side branches. At the same time, individual patients are different. The length of the tumor may be very long, and the location of the tumor may also vary greatly. The situation near the branch is also more common. If the release position of the covered stent is not accurate, the side branch blood vessel will often be occluded

Standardized straight-tube stent-grafts that have been marketed are difficult to meet the treatment requirements of various lesions with large differences in anatomical structure, and it is often necessary to customize side branch vessels for special vascular sites

However, custom-made multi-branch stents are expensive and have a long production cycle, and it is difficult for emergency patients to wait, and the range of indications is small

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