An intraoperative stent system

Abstract

The present invention provides an intraoperative stent system, which includes an artificial blood vessel part and a main body stent part sewn together with the artificial blood vessel part, and is characterized in that the intraoperative stent system also includes a side A branch stent part, the side branch stent part extends laterally from the artificial blood vessel part or the main body stent part, and is connected to and communicates with the artificial blood vessel part or the main body stent part. The intraoperative stent system of the present invention can save operation time and reduce operation difficulty.

Description

Technical field [0001] The present invention relates to an intraoperative stent system, which can be used for thoracotomy treatment of aortic (including ascending aorta, arch and descending aorta) lesions. Background technique [0002] In the existing medical technology, patients with Stanford type A dissection who suffer from full-course aortic (including ascending aorta, arch, and descending aorta) lesions are generally treated with median thoracotomy, in which artificial blood vessels are used. The ascending aorta and arch are replaced, and a piece of artificial blood vessel (commonly known as the elephant trunk) is inserted into the true lumen of the descending aorta to prepare for the second operation or the second intervention (stent graft). Most patients cannot complete the treatment after one operation, so a second operation is required. However, the second operation requires a thoracotomy from the lower part of the left rib cage, which is risky, expensive, and difficult...

AI Technical Summary

Problems solved by technology

[0005] (1). Some current thoracotomy operations use four-branch artificial blood vessels, three of which are respectively anastomosed with the innominate artery, left common carotid artery, and left subclavian artery. However, in actual operation, due to the anatomical shape of the human body, The left subclavian artery is located in the deep chest cavity, which is difficult to operate and even invisible, which increases the difficulty of anastomosis of this branch, and even in a considerable part of the surgery, the left subclavian artery has to be covered and then solved by bypass surgery

In this way, while the difficulty of the operation increases, it also increases the long-term complications.

[0006] (2). At present, there are some clinical case reports of three-branch intraoperative stents, but the clinical long-term therapeutic effect of three-branch intraoperative stents is not ideal

First of all, this type of product has the problem that the three branches are not easy to align at the same time during the operation, and it is easy to cause one or several branches to be narrowed or even blocked in the later stage.

Secondly, after the anastomosis, long-term lesions are likely to occur at the brachiocephalic trunk of the aortic arch and the anastomosis of the left common carotid artery.

[0007] (3). Some existing branch supports are not perfect in side branch design

First of all, the side branch has little room for maneuver. After the side branch enters the branch vessel, it cannot ensure a good fit between the main body and the side branch and the blood vessel. At the same time, the joint between the main body and the side branch is prone to stenosis or even occlusion.

To increase the flexibility of lateral branch roots, it is generally necessary to use a soft membrane design, but this will also indirectly cause the junction to be easily narrowed, so it is difficult to balance the above two points

Secondly, the side support is designed in a wave shape, which makes the support easy to fold at the junction of the two support segments; and if the side support is braided with spiral wire, the support segment is easy to shift during installation

[0008] (4). The existing stents are generally straight stents. Since the aortic arch is in a three-dimensional twisted shape, the stent cannot be completely attached to the blood vessel after implantation, which may easily cause endoleaks

[0009] (5). The existing artificial blood vessel is equal in diameter, so it cannot meet the requirements of the actual variable diameter blood vessel of the human body

[0010] (6). The current operation time is relatively long, which will cause greater pain and greater surgical risk to patients

Images