CN201058061Y - Branched vascular endografts in the aortic arch - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, which is a branched vessel intracavity graft suitable for aortic arch disease. It consists of a metal wire support (1) and a tubular fiber fabric (2) fixed in the support, divided into two parts: the main body (3) and the branch (4). The support (1) is made of ultra-elastic fine alloy wires in a continuous Z After being folded, several support circles are arranged to form a tube. The first stent ring (5) at the proximal end of the main body (3) is exposed without covering the fabric, and metal markers (6) are provided on the relevant parts of the intravascular graft, and the feature is that the branch (4) is located on the main body (3) Equivalent to the location of the innominate or left common carotid or left subclavian arteries. The utility model has the advantages of simple and convenient operation, high operation success rate, small trauma and low complication rate.

Description

Branched vascular endografts in the aortic arch

technical field

The utility model relates to the technical field of medical equipment, and is a branched vessel intracavity graft suitable for the aortic arch.

Background technique

With the improvement of living standards and the improvement of examination technology, the vascular diseases of the aortic arch are on the rise, and the diseases involving the three major branches of the aortic arch (innominate artery, left common carotid artery, and left subclavian artery) include the true artery of the aortic arch tumor, Stanford type A aortic dissection, etc. After the onset of such diseases, blood vessels often dilate gradually due to factors such as aortic sclerosis and high blood pressure. After the arterial wall expands to a certain extent, it cannot withstand the impact of blood flow pressure and suddenly ruptures, resulting in sudden death of the patient.

In recent years, the minimally invasive treatment of aortic disease with endovascular grafts has developed rapidly, reducing the complication rate and mortality rate of surgery. The vascular endoluminal isolation treatment device used in this operation is called vascular endoluminal graft or vascular endoluminal isolation system, which is composed of a wire stent and a tubular fiber fabric fixed in the stent. The conveyor is used to push it accurately to the lesion under the line. The stent is made of ultra-elastic fine alloy wires that are folded in a Z shape and then surrounded by several stent rings and arranged in a tubular shape. It is used to stretch the fabric and fix it on the lesion. It is equivalent to an artificial blood vessel, which is attached to the diseased part to isolate the diseased blood vessel segment from the blood flow (for details, see CN2427227Y "A New Type of Vascular Intraluminal Isolation System"; CN2427172Y "A New Type of Descending Aortic Vascular Endoluminal Isolation System"). According to the shape of the blood vessel in the lesion and its branches, different vascular endografts can be made. The vascular endograft is sent to the vascular lesion with a conveyor for release, and the stent expands by itself and sticks to the vascular wall of the lesion, so as to avoid the rupture of the aneurysm under the impact of blood flow, thereby achieving the purpose of minimally invasive treatment.

There are many branch arteries from the aorta to supply blood to the corresponding organs. Among them, the innominate artery, left common carotid artery, and left subclavian artery from the aortic arch supply blood to the head and upper limbs, and their importance is obvious. At present, open thoracotomy and extracorporeal circulation aortic replacement surgery are mostly used for aortic arch disease. The surgical trauma is large. In recent years, endovascular grafts have also been used, but the grafts do not have branches, so the branch vessels of the aortic arch must be bypassed. , that is, it is necessary to reconstruct the branch vessels of the arch, so the surgical trauma is large, the postoperative complication rate and mortality rate are high, and it brings great pain and economic burden to the patient.

Contents of the invention

The purpose of the utility model is to provide a branched vascular endograft suitable for the aortic arch. When this kind of endovascular graft is placed in the aortic arch, its branches are inserted into the innominate artery, left common carotid artery or left subclavian artery, which can ensure the blood supply to the head and upper limbs, and help the fixation of the endovascular graft .

The utility model is composed of a metal wire support and a tubular fiber fabric lined in the support, which is divided into two parts: the main body and the branch. , used to stretch the fabric and fix it on the lesion. The fabric is equivalent to an artificial blood vessel, which is attached to the lesion to isolate the diseased blood vessel segment from the blood flow. The first ring of the proximal end of the main body is a bare stent ring without covering the fabric, which is characterized in that according to the location of the hemangioma, there are branches at the corresponding parts of the innominate artery, left common carotid artery or left subclavian artery, and in the vessel lumen Metal markers are provided on the relevant parts of the endograft, such as metal markers around the tubular fiber fabric and at the boundary between the main body and the branches, so that they can be accurately positioned under X-ray imaging during insertion. The length of the main body is different due to the position of each branch and the diameter of each branch. For grafts bounded by branches and with branches of the innominate artery, the proximal segment (excluding the exposed stent ring) is longer than the other two grafts, usually 30-110mm, and the distal segment is shorter, usually 10-15mm; The proximal and distal segments of grafts with branches of the left common carotid artery are about the same length, 10-15 mm; while the grafts with branches of the left subclavian artery usually have a proximal segment of 10-15 mm and a distal segment that is shorter. Long, usually 30-150mm. The utility model can be made into different specifications and models as required.

When in use, according to the different parts of the aortic arch lesion, select the graft of the corresponding specification and model, fold it and put it into the transporter, and insert it into the corresponding position of the aortic arch by the introduction system along the blood vessel under X-ray routinely, and insert the branch into the corresponding position when releasing branch blood vessels.

The utility model has the advantages of convenient operation during implantation, high operation success rate and small trauma.

Description of drawings

Fig. 1 is a side view structural diagram of the utility model.

Fig. 2 is a schematic diagram of the three-dimensional structure of the utility model.

Fig. 3 is a side view structural schematic diagram of the utility model with a branch of the innominate artery.

Fig. 4 is a schematic diagram of the side structure of the utility model with a branch of the left common carotid artery.

Fig. 5 is a schematic diagram of the side view of the utility model with a branch of the left subclavian artery.

Detailed ways

Now in conjunction with accompanying drawing and embodiment the utility model is described in detail.

The utility model is composed of a wire support 1 and a tubular fiber fabric 2 fixed in the support, which is divided into two parts: a main body 3 and a branch 4. Metal markers 6 are provided on relevant parts of the graft, for example, metal markers 6 are provided around the periphery of the tubular fiber fabric and at the boundary between the main body part 3 and the branch part 4 .

Example 1 A kind of endovascular graft of aortic arch with branches of innominate artery

The bracket 1 of the utility model is woven with a nickel-titanium alloy wire with a diameter of 1mm, and the tubular fiber fabric 2 of the inner lining is made of polyester material. The outer diameter of the main body 3 is 34mm and the length is 120mm. The length of the proximal section of the main body is 95mm, the length of the exposed bracket at the end is 15mm, and the length of the distal section of the main body is 15mm. There are 4 "8"-shaped metal markers, which are symmetrically distributed up, down, left, and right.

Example 2 A kind of endovascular graft of the aortic arch with branches of the left common carotid artery

The outer diameter of the main body 3 of the utility model is 36mm, and the length is 48mm. The outer diameter of the branch 4 is 8mm, and the length is 10mm. All the other are with embodiment 1.

Example 3 A kind of endovascular graft of the aortic arch with branches of the left subclavian artery

The outer diameter of the main body part 3 of the utility model is 32 mm, and the length is 100 mm. The diameter of the branch 4 is 8 mm, and the length is 10 mm. All the other are with embodiment 1.

Claims (1)

1. A vascular endograft with branches in the aortic arch, consisting of a wire stent (1) and a tubular fiber fabric (2) fixed in the stent, divided into two parts, a main body (3) and a branch (4), The stent (1) is made of ultra-elastic fine alloy wires that are folded in a continuous Z shape and then surrounded into a number of stent rings arranged in a tubular shape. The main body (3) near the first ring of stent rings (5) is exposed and does not cover the fabric, and the vascular lumen The relevant parts of the internal graft are provided with metal markers (6), and it is characterized in that the branch (4) is located at the position of the main body (3) corresponding to the innominate artery or the left common carotid artery or the left subclavian artery, and the length of the main body varies with The location of each branch and the diameter of each branch are different.

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