Blood blocking elephant trunk stent assembly and elephant trunk stent implanting system

Abstract

The invention relates to the field of cardiovascular medical treatment, and particularly discloses an elephant trunk stent assembly capable of blocking blood and an elephant trunk stent implantation system. The elephant trunk stent assembly capable of blocking blood comprises a metal stent and a film-covered tube, the length of the film-covered tube is larger than that of the metal stent, a stent-free section is formed at the upper end of the film-covered tube, and the elephant trunk stent assembly capable of blocking blood further comprises a communicating tube and a blood blocking piece. The communicating pipe is of a flexible pipe structure, one end of the communicating pipe extends into the stent-free section and is detachably connected to the inner wall of the stent-free section, the blood blocking piece is detachably connected to the outer wall of the communicating pipe, and after the blood blocking piece is connected to the communicating pipe, part of the inner wall of the communicating pipe is attached to form a closing part for blocking an inner cavity of the communicating pipe; and the communicating pipe returns to the original shape after the blood blocking piece is detached. The disclosed elephant trunk stent implantation system comprises an elephant trunk stent assembly, an extracorporeal circulation machine, a first blood transfusion tube, a second blood transfusion tube and a third blood transfusion tube. The invention can effectively shorten the time of profound hypothermia and circulatory arrest so as to improve the surgical curative effect.

Description

technical field [0001] The invention relates to the field of cardiovascular medicine, in particular to a hemostatic elephant trunk bracket assembly and an elephant trunk bracket implantation system. Background technique [0002] Type A aortic dissection refers to a dissection involving the ascending aorta, which usually requires ascending aorta replacement, total arch replacement, and elephant trunk stent implantation; during the operation, the right axillary artery and right atrium are generally used to establish extracorporeal circulation ;Limited by the structure of type A aortic dissection, the process of implanting the elephant trunk stent into the descending aorta, and the anastomosis of the elephant trunk stent with the distal end of the four-branch main vessel all required deep hypothermia, circulatory arrest, and right axillary anastomosis. Arterial low-flow unilateral selective cerebral perfusion, the time of circulatory arrest is about 20-30 minutes, the distal or...

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Problems solved by technology

[0004] Although the elephant trunk bracket disclosed in the above-mentioned patent can shorten the time of circulatory arrest to a certain extent, the inventors of the present invention have found in clinical practice that the hemostatic device of this elephant trunk bracket is relatively complicated in structure, and the use cost is high and expensive. It is not convenient to use; more importantly, in the hemostatic device of the elephant trunk stent, the hemostatic membrane shrinks or expands together with the main body of the stent, and its complete hemostatic structure needs to cooperate with the main body lining (also called a support rod) Realization, that is, in the hemostatic stage, the inner lining of the main body passes through and blocks the through hole, and when the inner lining of the main body is removed, the hemostatic effect of the hemostatic device is also eliminated; and the anastomosis of the elephant trunk stent with the distal end of the four-branched main vessel is a must. The support rod is withdrawn first, that is to say, its hemostatic structure cannot be applied to the process of anastomosis of the elephant trunk stent with the distal end of the four-branch main vessel, and this process is a time-consuming stage that cannot be recovered Distal perfusion, which is less effective at shortening circulatory arrest time

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