Improved intraoperation stent system

Abstract

The invention provides an improved intraoperation stent system, which comprises an external tube, an internal tube which is sleeved in the external tube and capable of moving relative to the external tube, a control guide wire which is positioned in the external tube and can be inserted and withdrawn and a membrane-coated stent positioned between the external tube and the internal tube, wherein an ejecting device is arranged on the internal tube and is positioned behind the membrane-coated stent in a guiding direction to push the membrane-coated stent. The shape of the intraoperation stent system is small, the flexibility of the intraoperation stent system is high, the intraoperation guiding is convenient and damage to blood vessels is avoided. In the intraoperation stent system, the external tube also has marks, so the positioning is easy, the need of re-imaging in operation is obviated, and the requirements of hybrid operation are well met.

Description

technical field [0001] The invention relates to a medical device, more specifically to an intraoperative stent system used in surgical treatment of aortic lesions. Background technique [0002] In the existing medical technology, patients with Stanford type A aortic dissection who suffer from the whole aorta (including ascending aorta, aortic arch, descending aorta and abdominal aorta) are usually treated with median thoracotomy. The ascending aortic arch is replaced and a section of artificial blood vessel (commonly known as the elephant trunk) is sent into the true lumen of the descending aorta to prepare for the second operation or second interventional treatment (stent-graft implantation). Most patients cannot complete the treatment with one operation, and the second operation requires a thoracotomy from the left rib, which is risky, expensive, and difficult to connect. [0003] In recent years, an intraoperative stent has emerged, which can effectively solve the above-...

AI Technical Summary

Problems solved by technology

[0012] 1. The operation process requires deep hypothermic circulatory arrest (DHCA), which has high requirements for patients before operation and difficult recovery after operation

[0013] 2. The cooling and heating of the deep hypothermic cycle arrest require a long operating time, which is a test for the physical strength of the patient and the doctor

[0014] 3. The blood vessels are open during the operation, and it is easy to get air or be infected. During the operation, exhaust gas is required and the requirements are high

[0028] 4. The stent graft and its delivery system must have the function of retrograde introduction and release

[0031] However, the stents of the above two patents and their delivery systems have no reduced profile design, and the flexibility is not enough, and no markings are provided on the delivery system

In addition, the CN200420095867.1 patent also needs to make a large incision on the aorta to allow the intraoperative stent delivery system to pass through, while the CN200420103630.3 patent has the function of retrograde release, but it cannot be used for the above-mentioned hybrid surgery

Therefore, the stent systems of the above two patents cannot be well used in the above-mentioned hybrid surgery

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