CN219230279U - Aortic stent for reconstructing coronary artery - Google Patents
Aortic stent for reconstructing coronary artery Download PDFInfo
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- CN219230279U CN219230279U CN202320193330.1U CN202320193330U CN219230279U CN 219230279 U CN219230279 U CN 219230279U CN 202320193330 U CN202320193330 U CN 202320193330U CN 219230279 U CN219230279 U CN 219230279U
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Abstract
The utility model discloses an aortic stent for reconstructing coronary arteries, which comprises an aortic stent graft and is characterized in that three valve leaflet stent sheets are connected to the proximal end of the aortic stent graft along the circumference of the edge of a port, wherein side holes are formed in two valve leaflet stent sheets, and branch stent grafts are respectively connected to the side holes. The aortic stent can be used for reconstructing the coronary artery by adopting the intracavity minimally invasive interventional technology, can be conveniently delivered and installed at the position of the coronary artery, is easier to operate in operation, is firmly fixed in the coronary artery, and has the advantage of reducing risks in operation and after operation.
Description
Technical Field
The utility model belongs to the medical instrument technology for treating cardiovascular diseases, relates to a vascular stent, and in particular relates to an aortic stent for reconstructing coronary arteries.
Background
With the development of science and technology, medicine enters a minimally invasive age, and more operations can be completed through minimally invasive technology. Aortic dissection is severely life threatening, with a natural mortality rate of type a aortic dissection up to 60% and a mortality rate of surgery of 15%, mainly because currently open surgery is still the primary means for patients with type a aortic dissection, and surgery cannot be completed by minimally invasive techniques. The open operation needs to establish artificial heart-lung circulation, and the repair and reconstruction of blood vessels are carried out under the condition of cardiac arrest, so that the technical requirements on doctors and tolerance conditions of patients are high, and the general operation time is 6-8 hours, so that the operation is a challenge for both doctors and patients. The type a aortic dissection has not been completed by interventional minimally invasive techniques so far, mainly because the type a aortic dissection is due to the occurrence of a pathological dissection of the aorta continued by the aortic valve of the heart, which not only beats with the beating of the heart, but also the coronary arteries supplying the heart are separated in this section, which is disastrous for the patient due to the failure of the reconstruction of the coronary arteries.
Therefore, it is critical that the utility model of an aortic stent for reconstructing coronary arteries, which can be applied to minimally invasive interventional procedures, will reduce the difficulty and risk of the procedure. However, as shown in fig. 1, the human aorta 20 has an aortic valve 22 at a position corresponding to two coronary arteries 21 of the human. The aortic valve 22 is a three-leaflet structure dividing the aortic passageway of the human body into three spaced apart fan-shaped passageways 23, and the coronary arteries 21 of the human body are located on the side walls of two of the fan-shaped passageways 23. Such complex vascular structures make it very difficult to reconstruct the coronary artery from a typical vascular stent, and it is difficult to deliver the vascular stent to the coronary artery, and even if the vascular stent is installed, the fixation of the vascular stent in the coronary artery is not firm, and risks are great in operation and after operation.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an aortic stent for reconstructing coronary artery, which is suitable for minimally invasive interventional operation, can conveniently convey and mount the coronary artery covered stent to the coronary artery position, ensures that the coronary artery covered stent is firmly fixed in the coronary artery, has the advantage of reducing risks in and after operation, and overcomes the defects in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the aortic stent comprises an aortic stent graft, and is characterized in that three valve leaflet stent sheets are connected to the proximal end of the aortic stent graft along the circumference of the edge of a port, side holes are formed in two valve leaflet stent sheets, and branch stent grafts are connected to the side holes respectively.
With the adoption of the structure, the three valve leaflet support pieces are connected at the proximal end of the aortic stent graft along the circumference of the port edge, so that the three valve leaflet support pieces can be respectively stretched into the three fan-shaped channels of the three aorta during operation, the two valve leaflet support pieces with the branch stent graft are respectively positioned in the fan-shaped channels of the two communicating coronary arteries, the two branch stent graft can easily reach the positions of the two coronary arteries respectively, a channel for conveying the coronary artery stent graft can be formed, the coronary artery stent graft can be easily conveyed into the coronary artery, and the coronary artery stent graft in the coronary artery is firmly supported by the branch stent graft because the branch stent graft is always connected to the valve stent graft, so that the risk that the coronary artery stent graft falls off from the coronary artery is avoided.
In a further development of the utility model, it further comprises:
the main catheter is arranged in the aortic tectorial membrane bracket in a penetrating way;
the main guide wire penetrates through the main guide pipe and is preset in the main guide pipe;
the branch guide wire is preset in the branch tectorial membrane bracket;
an inner layer tie-down film wrapping the aortic stent graft;
an outer tie-down film wrapping the inner tie-down film;
an inner stay and an outer stay, the inner stay being sewn to the inner tie membrane and the outer stay being sewn to the outer tie membrane, the aortic stent graft being constrained to a fully constrained state; the aortic stent graft is constrained to an intermediate release state when the outer layer stay is pulled away from the outer layer tie film and the inner layer stay is retained in the inner layer tie film; the outer layer stay wire is pulled away from the outer layer constraint film and the inner layer stay wire is pulled away from the inner layer constraint film, and the aortic stent-graft is in a completely released state.
By adopting the technical scheme, when the minimally invasive interventional operation is performed and the whole aortic stent is in a completely-bound state, the completely-bound aortic stent can be delivered to the position, close to the coronary artery, in the aorta of the human body through the main catheter and the main catheter. The main artery covered stent is released to an intermediate release state by pulling the outer stay wire away from the position close to the coronary artery in the aorta, and the three valve leaf covered stent sheets and the two branch covered stents are simultaneously released and unfolded. When the position is adjusted, the internal stay wire is pulled away, so that the main artery stent is completely released and fixed in the aorta of the human body. And then the coronary artery covered stent in the constraint state is conveyed into the coronary artery of the human body through the aortic covered stent and the branch covered stent by using the branch guide wire, so that part of the coronary artery covered stent in the constraint state is reserved on the branch covered stent. After the coronary artery covered stent in the constraint state reaches the position, one part of the coronary artery covered stent is fixed in the coronary artery of the human body, and the other part of the coronary artery covered stent is connected and fixed on the branch covered stent by releasing the coronary artery covered stent, so that the reconstruction of the coronary artery is completed. The reconstructed coronary artery can open the coronary artery and the aorta of the human body safely and reliably, and the coronary artery covered stent, the branch covered stent and the aortic covered stent are connected reliably, so that the risk of hand neutralization and postoperative is greatly reduced.
In a preferred embodiment of the utility model, the proximal end of the main catheter has a conical head with a central bore in communication with the main catheter through which the main catheter passes. The conical head is also provided with a fixing hole which is fixed by the inner layer stay wire and the outer layer stay wire. The conical head has the guiding function in the blood vessel of the human body on one hand, and on the other hand, the whole aortic stent is fixed on the main catheter through the connecting function of the conical head and the stay wire sewed on the aortic stent, so that the aortic stent is prevented from falling off, and the main arterial stent is more convenient, easier and safer to convey.
In a preferred embodiment of the utility model, the tapered head rear end surface is in close proximity to the proximal tip of the leaflet support sheet and is fully capable of shielding the leaflet support sheet and the aortic stent graft in a fully constrained state.
In a preferred embodiment of the utility model, the first section of metal stent and the second section of metal stent of the aortic stent graft overlap each other by 3-7mm, preferably 5mm. Through overlapping arrangement, the supporting strength of the aortic tectorial membrane stent at the proximal end can be enhanced, so that the aortic tectorial membrane stent is firmly supported and fixed in the aorta of a human body and is not easy to fall off. The spacing between adjacent sections of metal brackets from and after the second section of metal bracket is 3-7mm, preferably 5mm.
In a preferred embodiment of the utility model, the distal portion of the branched stent graft is located inside the leaflet stent sheet.
The leaflet support piece is in a lotus petal shape, the width is 4-10mm, the length is 10-20mm, the side hole is 8-12mm away from the top of the proximal end of the leaflet support piece, and the diameter of the side hole is 3-7mm.
In a preferred embodiment of the utility model, the aortic stent graft has a diameter of 25-45mm and a length of 60-120mm in the fully released state, and the branched stent graft has a diameter of 3-7mm and a length of 15-25mm in the fully released state.
The aortic stent graft has a diameter in the intermediate release state that is 50% of the diameter in the fully released state.
By adopting the technical scheme, the aortic stent can be used for reconstructing the coronary artery by adopting the intracavity minimally invasive intervention technology, and the coronary artery covered stent can be conveniently delivered and installed at the position of the coronary artery, so that the operation is easier to operate, the coronary artery covered stent is firmly fixed in the coronary artery, and the method has the advantage of reducing risks in and after the operation.
Drawings
FIG. 1 is a cross-sectional view of a human aorta at a location of a human coronary artery;
FIG. 2 is a schematic illustration of the aortic stent graft of the present utility model in a fully constrained state;
FIG. 3 is a schematic illustration of the aortic stent graft of the present utility model in an intermediate released state;
FIG. 4 is a schematic illustration of the aortic stent graft of the present utility model in a fully released state;
FIG. 5 is a schematic view of the structure of the main stent graft in the circumferential direction;
FIG. 6 is a schematic cross-sectional view of a leaflet brace sheet with a branched stent graft;
FIG. 7 is a schematic view of the layered structure of an aortic stent graft and a leaflet brace sheet;
FIG. 8 is a structural cross-sectional view of the main conduit;
fig. 9 is a schematic view of a metal stent arrangement of an aortic stent graft.
Detailed Description
As shown in fig. 2 to 4, the aortic stent for reconstructing coronary arteries of the present utility model includes an aortic stent graft 100, two branch stent grafts 200, a main catheter 300, a main catheter 400, a branch guidewire 500, an inner constraint film 600, an outer constraint film 700, an inner stay 801, an outer stay 802, and three leaflet stent sheets 900. The aortic stent graft 100, the inner restriction membrane 600, the outer restriction membrane 700, and the leaflet stent sheets 900 constitute the main stent graft 10.
The three valve leaflet support pieces 900 and the aortic stent graft 100 are in an integrated structure, and the three valve leaflet support pieces 900 are circumferentially distributed along the port of the proximal end of the aortic stent graft (the proximal end of the utility model refers to the end of the stent, which is close to the heart after being mounted on a human blood vessel, and the other end, which is far away from the heart, is called the distal end).
Referring to fig. 6, two of the leaflet support pieces 900 are provided with side holes 901, and each side hole 901 is connected to a branch stent graft 200. The distal portion of the branched stent graft 200 is located inside the leaflet stent sheet 900 and the proximal portion is located outside the leaflet stent sheet 900. The distal end portion of the branched stent graft 200 is sewn to the inner wall of the leaflet bracket sheet 900. In the case where the branched stent graft 200 is sufficiently long, the distal end portion of the branched stent graft 200 may extend into the aortic stent graft 100 and be sewn to the inner wall of the aortic stent graft 100.
In the present utility model, the leaflet retainer sheet 900 has a petaloid shape, a width of 4-10mm, a length of 10-20mm, and a side hole of 3-7mm in diameter, which is 8-12mm from the proximal top of the leaflet retainer sheet.
The main catheter 300 is disposed through the inside of the aortic stent graft 100. The main guide wire 400 is preset throughout the main guide wire 300. The branch guide wire 500 is preset in the branch stent graft 200.
As shown in fig. 5, the inner layer of tie-down film 600 is wrapped around the outside of the aortic stent graft 100. The outer tie film 700 is wrapped around the outside of the inner tie film 600.
When inner pull wire 801 is sewn to inner and outer pull wires 600, 802 are sewn to outer tie film 700, aortic stent graft 100 is constrained to the fully constrained state as shown in fig. 2. When the outer layer pull wire 802 is pulled away from the outer layer tie film 700 and the remaining inner layer pull wire 801 is sewn to the inner layer tie film 600, the aortic stent graft 100 is constrained to an intermediate release state as shown in fig. 3. When the outer pull wire 802 is also pulled away from the outer tie film 700 and the inner pull wire slit 801 is also pulled away from the inner tie film 600, the aortic stent graft 100 is in the fully released state as shown in fig. 4. In this embodiment, the diameter of the aortic stent graft 100 in the intermediate released state is 50% of the diameter in the fully released state. The aortic stent graft 100 has a length of 60-120mm and a diameter of 25-45mm in the fully released state. The diameter of the branched tectorial membrane stent is 3-7mm, and the length is 15-25mm.
As shown in fig. 7, the aortic stent graft 100 and the leaflet stent sheet 900 have the structure that the inner layer is a stent graft 101 and the outer layer is a metal stent 102. The metal stent 102 is made of medical grade spring wire 102 a.
As shown in fig. 8, the proximal end of the main catheter 300 has a cone 301 of unitary construction. The diameter of the cone head 301 is larger than the diameter of the main guide pipe 301, and the cone head 301 is provided with a central hole 302 which is communicated with the main guide pipe 300 and is used for the main guide pipe 400 to penetrate. The cone 301 also has a fixation hole 303 at the edge, which is fixed by an inner layer pull wire 801 and an outer layer pull wire 802. The cone 301 has the guiding function in the blood vessel of the human body on one hand, and on the other hand, the whole aortic stent is fixed on the main catheter 300 through the connecting function of the stay wire sewed on the aortic stent, so that the aortic stent is prevented from falling off, and the main aortic stent is more convenient, easier and safer to convey.
The diameter of the cone 301 is the same as or slightly larger than the diameter of the aortic stent graft in the fully constrained state, so that, as shown in fig. 2, the rear end surface of the cone 301 can be abutted against the proximal tip of the main leaflet stent sheet and can completely shield the aortic stent graft 100 and the leaflet stent sheet 900 in the fully constrained state.
As shown in FIG. 9, the first section of metal stent 121 and the second section of metal stent 122 at the proximal end of the aortic stent graft 100 overlap each other by 3-7mm (as shown by the overlap distance L1), preferably 5mm. Through overlapping arrangement, the supporting strength of the aortic tectorial membrane stent at the proximal end can be enhanced, so that the aortic tectorial membrane stent is firmly supported and fixed in the aorta of a human body and is not easy to fall off. The spacing between adjacent sections of metal brackets from and after the second section of metal bracket is 3-7mm (as the spacing in the figure is L2 for example), preferably 5mm.
With the above technical solution, when the whole aortic stent is in a fully constrained state during the minimally invasive interventional operation, the fully constrained aortic stent 100 can be delivered to a position in the human aorta, which is close to the coronary arteries of the human body, through the main catheter 300 and the main catheter 400. The three leaflet brace pieces 900 and the two branch stent grafts 200 are simultaneously released and deployed by pulling the outer pull wire 802 away from the position within the human aorta adjacent to the human coronary arteries so that the main aortic stent graft 100 is released to an intermediate release state, and since the aortic stent graft 100 is now in the intermediate release state, the positions of the aortic stent graft 100, the leaflet brace pieces 900 and the branch stent grafts 200 can also be adjusted by manipulating the main catheter 300, the main guide wire 400 so that the three leaflet brace pieces 900 extend into the corresponding three fan-shaped channels 23 of the human aorta 20 (as shown in connection with fig. 1), and the two branch stent grafts 200 can be conveniently and easily aligned with or approximated to the two human coronary arteries 21 that need to be reconstructed. When the position is adjusted, the internal stay wire is pulled away, so that the main artery stent 100 is completely released and fixed in the main artery 20 of the human body. The constrained coronary stent graft is then delivered to the human coronary artery through the aortic stent graft 100 and the branched stent graft 200 using a branched guidewire such that a portion of the constrained coronary stent graft is retained in the branched stent graft 200. After the constrained coronary stent graft 200 reaches the position, by releasing the coronary stent graft, a part of the coronary stent graft is fixed in the coronary artery of the human body, and the other part is connected and fixed to the branch stent graft 200, thereby completing the reconstruction of the coronary artery. The reconstructed coronary artery can open the coronary artery and the aorta of the human body safely and reliably, and the coronary artery covered stent, the branch covered stent and the aortic covered stent are connected reliably, so that the risk of hand neutralization and postoperative is greatly reduced.
As can be seen from the above detailed description, the aortic stent can realize the reconstruction of the coronary artery by adopting the endoluminal minimally invasive intervention technology, and can conveniently deliver and install the coronary artery covered stent to the coronary artery position, so that the operation is easier to operate, the coronary artery covered stent is firmly fixed in the coronary artery, and the method has the advantage of reducing the risk during and after the operation.
Claims (10)
1. The aortic stent comprises an aortic stent graft, and is characterized in that three valve leaflet stent sheets are connected to the proximal end of the aortic stent graft along the circumference of the edge of a port, side holes are formed in two valve leaflet stent sheets, and branch stent grafts are connected to the side holes respectively.
2. The aortic stent system as set forth in claim 1, further comprising:
the main catheter is arranged in the aortic tectorial membrane bracket in a penetrating way;
the main guide wire penetrates through the main guide pipe and is preset in the main guide pipe;
the branch guide wire is preset in the branch tectorial membrane bracket;
an inner layer tie-down film wrapping the aortic stent graft;
an outer tie-down film wrapping the inner tie-down film;
an inner stay and an outer stay, the inner stay being sewn to the inner tie membrane and the outer stay being sewn to the outer tie membrane, the aortic stent graft being constrained to a fully constrained state; the aortic stent graft is constrained to an intermediate release state when the outer layer stay is pulled away from the outer layer tie film and the inner layer stay is retained in the inner layer tie film; the outer layer stay wire is pulled away from the outer layer constraint film and the inner layer stay wire is pulled away from the inner layer constraint film, and the aortic stent-graft is in a completely released state.
3. The aortic stent system for reconstructing coronary arteries according to claim 2, wherein: the proximal end of the main catheter has a conical head with a central bore in communication with the main catheter through which the main catheter passes.
4. An aortic stent as claimed in claim 3, wherein: the conical head is also provided with a fixing hole which is fixed by the inner layer stay wire and the outer layer stay wire.
5. An aortic stent as claimed in claim 3, wherein: the rear end face of the conical head is tightly attached to the top of the proximal end of the valve leaflet support piece and can completely shield the valve leaflet support piece and the aortic tectorial membrane support in a completely-bound state.
6. The aortic stent system for reconstructing coronary arteries according to claim 2, wherein: the first section of metal stent and the second section of metal stent of the aortic tectorial membrane stent are overlapped with each other by 3-7mm, and the interval between the adjacent sections of metal stents from the second section of metal stent and the following section of metal stent is 3-7mm.
7. Aortic stent as claimed in claim 1 or 2, characterized in that: the distal portion of the branched stent graft is located inside the leaflet stent sheet.
8. Aortic stent as claimed in claim 1 or 2, characterized in that: the leaflet support piece is in a lotus petal shape, the width is 4-10mm, the length is 10-20mm, the side hole is 8-12mm away from the top of the proximal end of the leaflet support piece, and the diameter of the side hole is 3-7mm.
9. The aortic stent system for reconstructing coronary arteries according to claim 2, wherein: the diameter of the aortic tectorial membrane stent in the complete release state is 25-45mm, the length is 60-120mm, and the diameter of the branched tectorial membrane stent in the complete release state is 3-7mm, and the length is 15-25mm.
10. The aortic stent system for reconstructing coronary arteries according to claim 2, wherein: the aortic stent graft has a diameter in the intermediate release state that is 50% of the diameter in the fully released state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320193330.1U CN219230279U (en) | 2023-02-13 | 2023-02-13 | Aortic stent for reconstructing coronary artery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320193330.1U CN219230279U (en) | 2023-02-13 | 2023-02-13 | Aortic stent for reconstructing coronary artery |
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| Publication Number | Publication Date |
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| CN219230279U true CN219230279U (en) | 2023-06-23 |
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| CN202320193330.1U Active CN219230279U (en) | 2023-02-13 | 2023-02-13 | Aortic stent for reconstructing coronary artery |
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- 2023-02-13 CN CN202320193330.1U patent/CN219230279U/en active Active
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