Support system

Abstract

The invention discloses a stent system, and relates to the technical field of medical treatment, the stent system comprises a main body stent, the main body stent comprises a support ring, an artificial blood vessel and a covered stent, and the artificial blood vessel is connected between the support ring and the covered stent; the conveyor comprises an outer sheath tube and a sheath core, the sheath core is sleeved with the outer sheath tube, a first cavity is defined by the outer sheath tube and the sheath core, the main body support is folded and contained in the first cavity, and the outer sheath tube can move in the extending direction of the sheath core relative to the sheath core so as to release the main body support. By connecting the artificial blood vessel with the covered stent, the main stent can be directly conveyed to the preset position through the conveyor, the operation does not need to be carried out under the condition of profound hypothermia circulation arrest, the operation safety of a patient is improved, the artificial blood vessel is supported through the supporting ring, the risks of folding and twisting of the artificial blood vessel can be reduced, and the operation safety is improved. The risk that the blood flow is affected due to the fact that the artificial blood vessel cannot be attached to the blood vessel wall after being released can be reduced, and the complication occurrence rate of patients is reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and in particular to a stent system. Background Art

[0002] In related technologies, aortic dissection is treated through the Sun procedure. The main technical principle of the Sun procedure is to cut the ascending aorta after deep hypothermic circulatory arrest, replace the ascending aorta with an artificial blood vessel, and anastomose it with the brachiocephalic artery, left common carotid artery, and left subclavian artery respectively. The distal end is inserted into the aortic stent through the aorta, and then the artificial blood vessel is anastomosed to the aortic stent. Finally, the artificial blood vessel and the proximal end of the aorta are anastomosed. However, the Sun procedure needs to be performed under conditions of deep hypothermic circulatory arrest, which can easily cause shock in patients. In addition, the artificial blood vessel is prone to folding and twisting, resulting in a high complication rate for patients. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a stent system that does not require deep hypothermic circulatory arrest for surgery and can reduce the incidence of complications in patients.

[0004] According to the stent system of the present invention, it includes: a main stent, the main stent includes: a support ring, an artificial blood vessel, and a coated stent, the artificial blood vessel is connected between the support ring and the coated stent; a conveyor, the conveyor includes: an outer sheath tube and a sheath core, the outer sheath tube is sleeved on the sheath core and together with the sheath core defines a first cavity, the main stent is folded and accommodated in the first cavity, and the outer sheath tube can move relative to the sheath core along the extension direction of the sheath core to release the main stent.

[0005] According to the stent system of the present invention, by connecting the artificial blood vessel with the covered stent, the main stent can be directly delivered to a preset position through a conveyor, and the operation does not need to be performed under conditions of deep hypothermia circulatory arrest, which is beneficial to improving the patient's surgical safety. In addition, by providing a support ring to support the artificial blood vessel, the risk of folding and twisting of the artificial blood vessel can be reduced, and the risk of affecting blood flow due to the failure of the artificial blood vessel to adhere to the blood vessel wall after release can also be reduced, thereby reducing the incidence of complications in patients.

[0006] In some examples of the present invention, the main stent further includes: a stent branch, the stent branch is used to reconstruct the left subclavian artery, the covered stent has a connecting hole, and the proximal end of the stent branch is located at the connecting hole.

[0007] In some examples of the present invention, the stent branches are arranged inside the stent graft.

[0008] In some examples of the present invention, both the end of the support ring away from the artificial blood vessel and the end of the stent graft away from the artificial blood vessel have a first developing point.

[0009] In some examples of the present invention, a second developing point is provided at the connection between the stent graft and the artificial blood vessel.

[0010] In some examples of the present invention, the number of first developing points at one end of the support ring away from the artificial blood vessel is multiple, the number of first developing points at one end of the coated stent away from the artificial blood vessel is multiple, and the number of second developing points is multiple.

[0011] In some examples of the present invention, the outer sheath includes: an intracorporeal tube portion and an extracorporeal tube portion, the intracorporeal tube portion and the extracorporeal tube portion are connected, the intracorporeal tube portion can be extended into the blood vessel, and the extracorporeal tube portion is formed with a perfusion port.

[0012] In some examples of the present invention, the extracorporeal tube portion includes a tube body and a connecting tube, one end of the connecting tube is connected to the tube body, and the other end of the connecting tube is formed with a perfusion port.

[0013] In some examples of the present invention, the conveyor also includes: a guide head, the guide head is arranged at the proximal end of the sheath core, the sheath core defines a second cavity, the second cavity passes through the sheath core along the extension direction of the sheath core, the guide head has a third cavity connected to the second cavity, and the cross-sectional area of the guide head gradually increases from the proximal end of the guide head to the distal end of the guide head.

[0014] In some examples of the present invention, the conveyor further includes: a sheath handle, which is sleeved on the outer sheath, and the sheath handle can drive the outer sheath to move along the extension direction of the sheath core.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 is a schematic structural diagram of a main support according to an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of a conveyor according to an embodiment of the present invention;

[0019] Figure 3-Figure 5 is a schematic diagram of interventional surgery steps according to an embodiment of the present invention;

[0020] Figure 6-Figure 7 Schematic diagram of the open surgery steps according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Main stent 1; support ring 11; artificial blood vessel 12; covered stent 13; communicating hole 131;

[0023] First developing point 14; second developing point 15;

[0024] Conveyor 2; outer sheath 21; internal tube portion 211; external tube portion 212; infusion port 213; tube body 214; connecting tube 215;

[0025] Sheath core 22; first cavity 23; guide head 24; sheath handle 25;

[0026] stent branch 3;

[0027] Left subclavian artery 4; brachiocephalic artery 5; left common carotid artery 6; ascending aorta 7; aortic arch 8. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] Reference below Figure 1-Figure 7 A bracket system according to an embodiment of the present invention is described.

[0030] like Figure 1-Figure 2 As shown, the stent system according to the present invention includes: a main stent 1, the main stent 1 includes: a support ring 11, an artificial blood vessel 12, and a coated stent 13, the artificial blood vessel 12 is connected between the support ring 11 and the coated stent 13; a conveyor 2, the conveyor 2 includes: an outer sheath 21 and a sheath core 22, the outer sheath 21 is sleeved on the sheath core 22 and together with the sheath core 22 defines a first cavity 23, the main stent 1 is folded and accommodated in the first cavity 23, and the outer sheath 21 can move relative to the sheath core 22 along the extension direction of the sheath core 22 to release the main stent 1.

[0031] Among them, the artificial blood vessel 12 (which can be but is not limited to being made of polyester material) is connected between the support ring 11 and the coated stent 13. The artificial blood vessel 12 is connected to the support ring 11, and the support ring 11 can support the artificial blood vessel 12. When the main stent 1 is in the released state, the support ring 11 supports the artificial blood vessel 12, which can reduce the risk of the artificial blood vessel 12 being folded or twisted, and can also reduce the risk of the artificial blood vessel 12 failing to fit the blood vessel wall after release, thereby affecting blood flow, thereby reducing the incidence of complications in patients.

[0032] The conveyor 2 may include an outer sheath 21 and a sheath core 22. Both the sheath core 22 and the outer sheath 21 may be constructed as a hollow tubular structure. The outer sheath 21 is sleeved on the sheath core 22, and the outer sheath 21 and the sheath core 22 jointly define a first cavity 23. The main stent 1 is folded and accommodated in the first cavity 23. At this time, the main stent 1 is in a compressed state, and the conveyor 2 can convey the main stent 1 to a preset position. The outer sheath 21 can move relative to the sheath core 22 along the extension direction of the sheath core 22 to release the main stent 1 when the main stent 1 is conveyed to the preset position, thereby meeting the needs of most patients with various aortic diseases. By connecting the artificial blood vessel 12 with the coated stent 13, the main stent 1 can be directly conveyed to the preset position through the conveyor 2. The operation does not need to be performed under conditions of deep hypothermia circulatory arrest, which is beneficial to improving the patient's surgical safety.

[0033] Specifically, the main stent 1 is folded and housed in the first cavity 23 between the outer sheath 21 and the sheath core 22. It can be understood that the outer sheath 21 can limit the expansion of the main stent 1. The main stent 1 and the conveyor 2 are inserted into the body through femoral artery puncture and conveyed to a preset position. Along the extension direction of the sheath core 22, the outer sheath 21 is controlled to move toward the distal end relative to the sheath core 22 to release the main stent 1 (the coated stent 13 can be a memory metal) to form a blood flow channel. The blood flow channel allows blood to flow through to reconstruct the blood vessel. At this time, the support ring 11 supports the artificial blood vessel 12 so that the artificial blood vessel 12 fits the blood vessel wall. By using the main stent 1 of the present application, the vascular anastomosis area of the aortic arch 8 can be expanded, the difficulty of the operation can be reduced, the free length of the aorta can be shortened, and the incidence of complications can be reduced.

[0034] Therefore, by connecting the artificial blood vessel 12 with the coated stent 13, the main stent 1 can be directly delivered to the preset position through the conveyor 2, and the operation does not need to be performed under the condition of deep hypothermia circulatory arrest, which is beneficial to improving the patient's surgical safety. In addition, by providing the support ring 11 to support the artificial blood vessel 12, the risk of folding and twisting of the artificial blood vessel 12 can be reduced, and the risk of the artificial blood vessel 12 failing to adhere to the blood vessel wall after release, thereby affecting blood flow, thereby reducing the incidence of complications in patients.

[0035] In some examples of the present invention, Figure 1 As shown, the main stent 1 may further include: a stent branch 3, the stent branch 3 is used to reconstruct the left subclavian artery 4, the covered stent 13 has a connecting hole 131, and the proximal end of the stent branch 3 is located at the connecting hole 131.

[0036] The covered stent 13 has a connecting hole 131, and the stent branch 3 has a proximal end (the end close to the heart) and a distal end (the end away from the heart), with the proximal end of the stent branch 3 located at the connecting hole 131. Due to the deep location of the left subclavian artery 4, it is difficult to expose and anastomose the left subclavian artery 4 in some patients with poor anatomical conditions. By providing the stent branch 3 and positioning the proximal end of the stent branch 3 at the connecting hole 131, when the main stent 1 is released, the left subclavian artery 4 can be directly reconstructed, reducing the difficulty in exposing the left subclavian artery 4 and the secondary injuries such as nerve damage and thoracic duct damage caused during the process of freeing the aorta, thereby reducing the risk of complications related to the freeing of the left subclavian artery 4, simplifying the surgical steps, and shortening the operation time.

[0037] In some examples of the present invention, Figure 1 As shown, the stent branch 3 is arranged on the inner side of the stent graft 13 .

[0038] Among them, the stent branch 3 is arranged on the inner side of the coated stent 13. This arrangement can make the setting position of the stent branch 3 reasonable, which can reduce the difficulty of reconstructing the left subclavian artery 4, thereby further reducing the difficulty of exposing the left subclavian artery 4 and the secondary injuries such as nerve damage and thoracic duct damage caused during the free aorta, thereby further reducing the risk of complications related to the free left subclavian artery 4, and is also conducive to further simplifying the surgical steps and shortening the operation time.

[0039] In some examples of the present invention, Figure 1 As shown, both the end of the support ring 11 away from the artificial blood vessel 12 and the end of the coated stent 13 away from the artificial blood vessel 12 have a first developing point 14 .

[0040] Among them, the end of the support ring 11 away from the artificial blood vessel 12 has a first developing point 14, and the end of the support ring 11 away from the artificial blood vessel 12 can have one or more first developing points 14. The end of the covered stent 13 away from the artificial blood vessel 12 has a first developing point 14, and the end of the covered stent 13 away from the artificial blood vessel 12 can have one or more first developing points 14. The first developing point 14 is used for positioning under fluoroscopy. Implanting the main stent 1 under femoral artery fluoroscopy can avoid the inability to observe the proximal end of the dissection during the Sun's surgery when implanting the stent directly, thereby reducing the difficulty of implanting the proximal end of the main stent 1 and reducing the risk of the main stent 1 mistakenly entering the false lumen, the artificial blood vessel 12 being bent and twisted, and implanting the main stent 1 under femoral artery fluoroscopy can reduce the risk of problems being difficult to detect after they occur, which is conducive to timely detection of blood flow abnormalities and other conditions, thereby significantly reducing the incidence of complications.

[0041] In some examples of the present invention, Figure 1 As shown, the connection between the stent graft 13 and the artificial blood vessel 12 has a second developing point 15 .

[0042] Among them, the connection between the coated stent 13 and the artificial blood vessel 12 has a second developing point 15. The connection between the coated stent 13 and the artificial blood vessel 12 can have one or more second developing points 15. The second developing point 15 is used for positioning under fluoroscopy. Implanting the main stent 1 under femoral artery fluoroscopy can avoid the inability to observe the proximal end of the dissection under direct vision during the Sun's surgery. This can further reduce the difficulty of implanting the proximal end of the main stent 1, and further reduce the risk of the main stent 1 mistakenly entering the false cavity, the artificial blood vessel 12 being folded and twisted, and implanting the main stent 1 under femoral artery fluoroscopy can further reduce the risk of difficulty in discovering problems after they occur, which is conducive to timely discovery of blood flow abnormalities and other conditions, thereby greatly reducing the incidence of complications.

[0043] As some embodiments of this application, Figure 1 As shown, the end of the support ring 11 away from the artificial blood vessel 12 and the end of the coated stent 13 away from the artificial blood vessel 12 both have a first developing point 14, and the connection between the coated stent 13 and the artificial blood vessel 12 has a second developing point 15. This arrangement can make the end position and the middle position of the main stent 1 have perspective points, which is beneficial for doctors to make accurate judgments by combining multiple perspective point information at different positions during the operation, and to make timely treatment that is beneficial to the patient.

[0044] In some examples of the present invention, Figure 1 As shown, the number of the first developing points 14 at one end of the support ring 11 away from the artificial blood vessel 12 is multiple, the number of the first developing points 14 at one end of the coated stent 13 away from the artificial blood vessel 12 is multiple, and the number of the second developing points 15 is multiple.

[0045] Among them, the number of the first developing points 14 at one end of the support ring 11 away from the artificial blood vessel 12 is multiple, for example: the number of the first developing points 14 at one end of the support ring 11 away from the artificial blood vessel 12 is two, three or more. The number of the first developing points 14 at one end of the coated stent 13 away from the artificial blood vessel 12 is multiple, for example: the number of the first developing points 14 at one end of the coated stent 13 away from the artificial blood vessel 12 is two, three or more. The number of the second developing points 15 is multiple, for example: the number of the second developing points 15 is two, three or more. This arrangement allows the doctor to observe more comprehensively during the operation, further reducing the risk of problems such as the main stent 1 mistakenly entering the false lumen and the artificial blood vessel 12 being bent and twisted. In addition, implanting the main stent 1 under femoral artery fluoroscopy can further reduce the risk of problems being difficult to detect after they occur, which is conducive to timely detection of blood flow abnormalities and other conditions, thereby significantly reducing the incidence of complications.

[0046] In some examples of the present invention, Figure 2As shown, the outer sheath 21 may include: an intracorporeal tube portion 211 and an extracorporeal tube portion 212 , the intracorporeal tube portion 211 and the extracorporeal tube portion 212 are connected, the intracorporeal tube portion 211 can extend into a blood vessel, and the extracorporeal tube portion 212 is formed with a perfusion port 213 .

[0047] Among them, the internal tube portion 211 is connected to the external tube portion 212. As some embodiments of the present application, the internal tube portion 211 and the external tube portion 212 are integrally formed. The internal tube portion 211 can be extended into the blood vessel, and the external tube portion 212 is formed with a perfusion port 213. The perfusion port 213 can be used to cannulate the right subclavian artery and the left internal carotid artery to perform cerebral blood perfusion to establish extracorporeal circulation, thereby maintaining the patient's vital signs.

[0048] In some examples of the present invention, Figure 2 As shown, the extracorporeal tube portion 212 includes a tube body 214 and a connecting tube 215 . One end of the connecting tube 215 is connected to the tube body 214 , and the other end of the connecting tube 215 is formed with a perfusion port 213 .

[0049] Along the extension direction of the connecting tube 215, one end of the connecting tube 215 is connected to the tube body 214, and the other end of the connecting tube 215 is formed with a perfusion port 213. The perfusion port 213 can be used to cannulate the right subclavian artery and the left internal carotid artery for cerebral blood perfusion to establish extracorporeal circulation, thereby maintaining the patient's vital signs. It is understood that if the patient's blood vessels are too thin, it can also be convenient to replace a thinner catheter for extracorporeal circulation via a guidewire. In addition, by making the extracorporeal tube portion 212 include the tube body 214 and the connecting tube 215, the perfusion port 213 is formed on the end of the connecting tube 215 away from the tube body 214, which can facilitate the connection of an external blood supply machine with the perfusion port 213, thereby simplifying the surgical steps and shortening the surgical time.

[0050] In some examples of the present invention, Figure 2 As shown, the conveyor 2 may further include: a guide head 24, which is arranged at the proximal end of the sheath core 22, the sheath core 22 defines a second cavity, the second cavity passes through the sheath core 22 along the extension direction of the sheath core 22, the guide head 24 has a third cavity connected to the second cavity, and the cross-sectional area of the guide head 24 gradually increases from the proximal end of the guide head 24 to the distal end of the guide head 24.

[0051] The sheath core 22 can be constructed as a hollow tubular structure to define a second cavity, which extends through the sheath core 22 along its extension direction. A guide head 24 can be located at the proximal end of the sheath core 22 and include a third cavity communicating with the second cavity. In some embodiments of the present application, the third cavity extends through the guide head 24 along its extension direction, and a guide member can extend into the third cavity. Before delivering the conveyor 2 into the blood vessel, the distal end of the guide member can be inserted into the third cavity to guide the direction of movement of the conveyor 2 and propel the conveyor 2 until the main stent 1 is delivered to a predetermined position within the blood vessel. The cross-sectional area of the guide head 24 gradually increases from the proximal end to the distal end, forming a conical shape. This configuration can reduce resistance from the blood vessels and blood during insertion of the guide head 24, facilitating smooth insertion of the guide head 24, thereby reducing surgical time and improving surgical success rates.

[0052] In some examples of the present invention, Figure 2 As shown, the conveyor 2 further includes a sheath handle 25 , which is sleeved on the outer sheath 21 and can drive the outer sheath 21 to move along the extending direction of the sheath core 22 .

[0053] Among them, the sheath handle 25 can be constructed as a hollow tubular structure, the sheath handle 25 can be sleeved on the outer sheath 21, the sheath handle 25 is located outside the blood vessel, the doctor (operator) can operate the sheath handle 25 (pull or rotate) to drive the outer sheath 21 to move toward the distal end along the extension direction of the sheath core 22. During the movement of the outer sheath 21, the main stent 1 gradually breaks free from the restraint of the outer sheath 21 and is gradually exposed outside the conveyor 2. The main stent 1 can be unfolded to form a blood flow channel, and the blood flow channel allows blood to flow through to reconstruct the blood vessel. By setting the sheath handle 25, after the conveyor 2 reaches the designated position in the blood vessel, it is convenient to unfold the main stent 1 according to the preset surgical process to achieve the effect of reconstructing the blood vessel.

[0054] As some embodiments of the present application, the conveyor 2 may further include a rear release system. During the movement of the outer sheath 21, the main body support 1 gradually breaks free from the restraint of the outer sheath 21 and is gradually exposed outside the conveyor 2. The rear release system can reduce the risk of blood flow impacting the main body support 1 and causing the main body support 1 to shift.

[0055] like Figure 3-Figure 5As shown, in the hybrid operating room, first, the right subclavian artery is cannulated with or without the left internal carotid artery, and then the main stent 1 is implanted through the femoral artery cannulation. Under the guidance of DSA (Digital Subtraction Angiography), the main stent 1 is released to the aortic arch 8 to cover the dissection area. At this time, the brachiocephalic artery 5 and the left common carotid artery 6 are covered by the main stent 1. The perfusion port 213 is immediately used to cannulate the right subclavian artery for cerebral blood perfusion (if the left internal carotid artery is cannulated, the right subclavian artery and the left internal carotid artery are perfused with cerebral blood). Then the main stent 1 is implanted through the left subclavian artery 4 to reconstruct the blood supply of the left subclavian artery 4 and further ensure cerebral blood perfusion. The above steps are performed under the fluoroscopy of the first developing point 14 and the second developing point 15, which can reduce the risk of the main stent 1 mistakenly entering the false lumen, the main stent 1 being folded, and other problems. At this time, blood is drawn out through the femoral artery cannulation to supply blood to the bilateral carotid arteries to ensure bilateral cerebral perfusion.

[0056] like Figure 6-Figure 7 As shown, open surgery is then performed to establish extracorporeal circulation through aortic cannulation, and the ascending aorta 7 is controlled and blocked. At this time, the right subclavian artery cannulation, the left common carotid artery 6 cannulation, and the femoral artery cannulation are all performed through the aortic cannulation to ensure blood supply to the brain and body organs through extracorporeal circulation. Under extracorporeal circulation, the ascending aorta 7, the brachiocephalic artery 5, and the left common carotid artery 6 are cut open. Since the left subclavian artery 4 has been reconstructed using intravascular technology, there is no need to free the left subclavian artery 4, avoiding the difficulty in exposing the left subclavian artery 4 and the secondary damage caused during the process of freeing the aorta. Subsequently, an artificial blood vessel 12 is used to anastomose the ascending aorta 7, the brachiocephalic artery 5, and the left common carotid artery 6. After the anastomosis, the extracorporeal circulation can be stopped to complete the operation. This surgical procedure also avoids the step of deep hypothermia circulatory arrest required during the implantation of the stent after the aorta is cut open in Sun's operation.

[0057] It is understood that changes in the materials used in the stent system, the structure of the main stent 1 with the integrated release of the artificial blood vessel 12 and the covered stent 13, the stent branches 3 or other methods of reconstructing the left subclavian artery 4, changes in the details of the surgical method used in conjunction with the main stent 1 of the present application, or the use of the main stent 1 of the present application to treat aortic arch 8 aneurysms should be understood as not departing from the scope of protection of the present application.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0060] In the description of the present invention, "plurality" means two or more.

[0061] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0062] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0063] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A support system, characterized in that: include: The main stent comprises a support ring, an artificial blood vessel, and a covered stent, wherein the artificial blood vessel is connected between the support ring and the covered stent; The conveyor comprises: an outer sheath tube and a sheath core, wherein the outer sheath tube is sleeved on the sheath core and defines a first cavity together with the sheath core, the main body support is folded and accommodated in the first cavity, and the outer sheath tube can move relative to the sheath core along the extension direction of the sheath core to release the main body support.

2. The bracket system according to claim 1, wherein: The main stent also includes: a stent branch, which is used to reconstruct the left subclavian artery. The covered stent has a communicating hole, and the proximal end of the stent branch is located at the communicating hole.

3. The support system according to claim 2, wherein: The stent branches are arranged on the inner side of the stent graft.

4. The bracket system according to claim 1, wherein: The end of the support ring away from the artificial blood vessel and the end of the stent graft away from the artificial blood vessel both have a first developing point.

5. The bracket system according to claim 4, characterized in that: The connection between the stent graft and the artificial blood vessel has a second developing point.

6. The support system according to claim 5, characterized in that: The number of the first developing points at the end of the support ring away from the artificial blood vessel is multiple, the number of the first developing points at the end of the coated stent away from the artificial blood vessel is multiple, and the number of the second developing points is multiple.

7. The support system according to any one of claims 1 to 6, characterized in that: The outer sheath comprises an internal tube portion and an external tube portion, wherein the internal tube portion is connected to the external tube portion, the internal tube portion can be extended into a blood vessel, and the external tube portion is formed with a perfusion port.

8. The support system according to claim 7, wherein: The extracorporeal tube portion includes a tube body and a connecting tube, one end of the connecting tube is connected to the tube body, and the other end of the connecting tube is formed with the perfusion port.

9. The support system according to any one of claims 1 to 6, characterized in that: The conveyor also includes: a guide head, which is arranged at the proximal end of the sheath core, the sheath core defines a second cavity, the second cavity passes through the sheath core along the extension direction of the sheath core, and the guide head has a third cavity connected to the second cavity. From the proximal end of the guide head to the distal end of the guide head, the cross-sectional area of the guide head gradually increases.

10. The support system according to claim 9 is characterized in that: The conveyor further includes a sheath handle, which is sleeved on the outer sheath and can drive the outer sheath to move along the extending direction of the sheath core.

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