Ascending aorta covered stent and conveying system assembly and using method thereof

Abstract

The invention discloses an ascending aorta covered stent and conveying system assembly and a using method thereof, belongs to the technical field of minimally invasive surgery, and aims to solve the problems that in the prior art, minimally invasive surgery is difficult to use in ascending aorta treatment and the like. The ascending aorta covered stent and conveying system assembly comprises a stent conveyor and a covered stent. The stent conveyor comprises an outer sheath tube, an adjustable bent tube, a single-cavity inner middle tube, a single-cavity inner tube, a flexible TIP head, a chronic dilator and an adjusting handle. The covered stent comprises a proximal end bare crown stent and a telecentric end covered stent which are connected with each other. According to the ascending aorta covered stent and conveying system assembly and the using method thereof, the problem that the ascending aorta dissection is not suitable for minimally invasive surgery is solved, the death rate and the complication occurrence rate in the surgery period are reduced, the needed hospitalization and postoperative monitoring time is shorter, and the outer sheath tube has enough axial and radial supporting force and compliance.

Description

technical field [0001] The invention relates to the technical field of minimally invasive surgery, in particular to an ascending aortic stent graft, a delivery system component and a use method thereof. Background technique [0002] When the pathological dilation of the aorta exceeds 50% of the normal vessel diameter, it is called an aortic aneurysm. Aortic aneurysms located in the ascending aorta often involve the aortic sinus, causing deformation of the aortic valve annulus and separation of the valve leaflets, resulting in aortic valve insufficiency and long-term effects leading to heart failure. According to the distribution of aortic lesions, aortic dissection can be divided into the following three types according to the DeBakey system: Type I dissection originates from the ascending aorta, extends beyond the aortic arch to the descending aorta, and even the abdominal aorta, and this type is the most common. Type II dissection originates and is limited to the ascendin...

AI Technical Summary

Problems solved by technology

[0005] Due to the complex anatomical structure of the ascending aorta, there are heart, valves, and coronary arteries at the anterior proximal end, and there are supraarchic branch arteries supplying blood to the brain and upper limbs at the rear. The pulsation and deformation are large, coupled with the criticality of ascending aortic dissection; it is difficult to accurately position the stent in an extremely limited area. The anchoring of the stent must not only overcome the pulsation and deformation of the vessel wall, but also prevent backward displacement or even tear the dissection , but also to prevent the stent from protruding into the sinus to prevent damage to the valve and block the coronary artery, making it difficult to apply the minimally invasive technique in the ascending aorta to the treatment of the ascending aorta

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