Intra-operative stent system

Abstract

An intraoperative stent system, comprising an artificial blood vessel portion (4) and a main stent portion (5) sutured together with the artificial blood vessel portion (4); the intraoperative stent system also comprises a side branch stent portion (6), the side branch stent portion (6) transversely extending outward from the artificial blood vessel portion (4) or the main stent portion (5), and connecting to and communicating with the artificial blood vessel portion (4) or the main stent portion (5). The intraoperative stent system saves operation time and reduces operation difficulty.

Description

technical field [0001] The invention relates to an intraoperative stent system, which can be used for open-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 the whole aorta (including the ascending aorta, arch and descending aorta) are generally treated with median thoracotomy. The ascending aorta and arch are replaced and a section of artificial blood vessel (commonly known as the elephant trunk) is placed in the true lumen of the descending aorta in preparation for the second surgery or second interventional treatment (stent-graft implantation). 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, which is risky, expensive, and difficult to connect. [0003] Later, an in...

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 stenting in three-branch surgery, but the clinical long-term treatment effect of using three-branch stenting in surgery 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 brackets 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 more pain and greater surgical risk to patients

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