Membrane rupturing device of aorta membrane coated stent

Abstract

The invention discloses a membrane rupturing device of an aorta membrane coated stent. The membrane rupturing device comprises an outer sheath tube 12, a convolute elastic tube 22 and a puncturing needle 32, wherein the outer sheath tube 12 can be pushed into a blood vessel; the tube wall of one end of the outer sheath tube 12 communicates with a two-port valve / triple valve 13; a supporting protection net 23 is fixedly connected to one end of the convolute elastic tube 22; the convolute elastic tube 22 and the supporting protection net 23 are arranged in the outer sheath tube 12, and can extend out from the outer sheath tube 12; after extending out of the outer sheath tube 12, the supporting protection net 23 is inflated; the puncturing needle 32 is arranged in the convolute elastic tube 22; and the needle head end of the puncturing needle 32 can extend out of the convolute elastic tube 22 and is located in the supporting protection net 23. According to the membrane rupturing device disclosed by the invention, the supporting protection net at the end of the convolute elastic tube extends out of the outer sheath tube, and is inflated to support a branch blood vessel; and when the puncturing needle penetrates through the supporting protection net in the branch blood vessel to arrive at a membrane coated stent for puncturing the membrane to dredge the branch blood vessel, and thepuncturing needle can easily penetrate through the branch blood vessel without damaging the branch blood vessel under the supporting of the supporting protection net.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, in particular to an aortic stent graft rupture device. Background technique [0002] Aortic dissection (aortic dissection) is a tear in the aortic artery wall, which used to be called aortic dissection aneurysm (dissection aortic aneurysm), which refers to the rupture of the intima of the aortic wall caused by various reasons, and blood flow into the aorta Intramurally, resulting in delamination of the vessel wall, separated by stripped intimal sheets to form a "double lumen aorta", which is a type of aortic dilatation disease. [0003] Stent-graft implantation using endovascular stents is a new interventional treatment method for aneurysms since the 1990s. It has the advantages of small trauma, fast recovery, and low operating technical threshold. The stent used to treat dilated lesions of the aorta is a covered stent, which is composed of a metal stent and a capsule. However, in the ...

AI Technical Summary

Problems solved by technology

The stent used to treat dilated lesions of the aorta is a covered stent, which is composed of a metal stent and a capsule. However, in the actual clinical treatment process, if the lesion is too close to the upper arch branch, the capsule after the covered stent is propped up may push the branch vessel Covering the branch vessels leads to blockage, which is very life-threatening to the patient. This requires the establishment of branch channels according to the shape of the branch vessels. Using a puncture needle to pierce the capsule to dredge the branch vessels is a common clinical solution at present.

Due to the distortion and inclination of the branch blood vessels in three-dimensional space, when the rigid puncture needle passes through because its axis cannot coincide with the center line of the blood vessel, the puncture is easy to deviate and penetrate the branch blood vessels, and even injure the aorta, which is life-threatening; or Puncture damages the esophagus and trachea, causing pollution

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