Magnetic anastomosis aortic arch

Abstract

The utility model relates to a magnetic anastomosis aortic arch which comprises four artificial blood vessels and a plurality of second magnetic rings, the anastomotic stoma of each artificial blood vessel is provided with a first magnetic ring, each second magnetic ring is arranged at the broken end of the corresponding human blood vessel, and the first magnetic ring and the second magnetic ring attract each other through the magnetic force of the first magnetic ring and the magnetic force of the second magnetic ring. Connection and anastomosis of the artificial blood vessel and the human blood vessel are achieved. The four artificial blood vessels are an aorta blood vessel, a brachial trunk blood vessel, a left common carotid artery blood vessel and a left subclavian artery blood vessel, and one end of the brachial trunk blood vessel, one end of the left common carotid artery blood vessel and one end of the left subclavian artery blood vessel are sequentially connected on the aorta blood vessel in the direction from the ascending aorta to the descending aorta. And the other end of the brachial trunk blood vessel, the other end of the left subclavian artery blood vessel and the two ends of the aorta blood vessel are anastomotic stomas of the artificial blood vessel. The arcus aortae operation can be simplified, the operation time is shortened, the operation difficulty is reduced, operation wounds are reduced, and the operation effect and safety are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a magnetic anastomosis aortic arch for rapid replacement of the aortic arch. Background Art

[0002] The aortic arch is the largest artery in the human body. It originates from the left ventricle of the heart, curves upward, and extends downward and backward. It is divided into three parts: the ascending aorta, the aortic arch, and the descending aorta. The aortic arch branches into three: the brachiocephalic trunk, the left common carotid artery, and the left subclavian artery, which supply blood to the head, neck, and upper limbs, respectively. The normal diameter of the aortic arch is 2-3 cm and its length is 5-6 cm.

[0003] Diseases of the aortic arch include congenital anomalies, aortic dissection, aortic aneurysm, aortic stenosis, aortitis, etc., which seriously affect the patient's quality of life and prognosis. Surgical treatment of the aortic arch is a high-risk and difficult surgical procedure that needs to be performed under conditions of cardiac arrest, extracorporeal circulation, and hypothermic cerebral perfusion. During the operation, five anastomoses need to be sutured, namely the ascending aorta, brachiocephalic trunk, left common carotid artery, subclavian artery, and descending aorta. The location of these anastomoses varies, and the difficulty of suturing also varies. The time and quality of suturing directly affect the effectiveness and safety of the operation. The longer the operation, the higher the risk of complications for the patient, including bleeding, infection, neurological damage, organ failure, etc. Therefore, current aortic arch surgery has great limitations and can only be performed by a few large cardiac surgery departments. In addition, the surgery is very traumatic and the patient's recovery time is also very long. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a magnetic anastomosis of the aortic arch, so as to simplify the operation of aortic arch surgery, shorten the operation time, reduce the difficulty of surgery, reduce surgical trauma, and improve the surgical effect and safety.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A magnetic anastomosis aortic arch comprises four artificial blood vessels and a plurality of second magnetic rings. The anastomosis opening of each artificial blood vessel is provided with a first magnetic ring, and each second magnetic ring is provided with a corresponding human blood vessel stump. The connection and anastomosis between the artificial blood vessel and the human blood vessel are achieved through the magnetic attraction between one of the first magnetic rings and one of the second magnetic rings.

[0007] In one embodiment, the four artificial blood vessels are the aorta, the brachiocephalic trunk, the left common carotid artery and the left subclavian artery. On the aorta, one end of the brachiocephalic trunk, one end of the left common carotid artery and one end of the left subclavian artery are connected in sequence along the direction from the ascending aorta to the descending aorta. The other end of the brachiocephalic trunk, the other end of the left subclavian artery and the two ends of the aorta serve as the anastomosis of the artificial blood vessels.

[0008] In one embodiment, the axial lengths of the first magnetic ring and the second magnetic ring are 3-5 mm.

[0009] In one embodiment, the first magnetic ring and the second magnetic ring adopt the following structure:

[0010] It comprises a magnetic ring A and a non-magnetic sleeve, one end of the non-magnetic sleeve is inserted into the inner ring of the magnetic ring A, and the outer wall of the other end is provided with a convex edge along the circumferential direction.

[0011] In one embodiment, the first magnetic ring and the second magnetic ring adopt the following structure:

[0012] It comprises a magnetic ring B and a memory alloy bracket, wherein one end of the memory alloy bracket is connected to the inner wall of the magnetic ring B, and the other end extends into the blood vessel lumen.

[0013] In one embodiment, the memory alloy stent includes a cylindrical upper half and a truncated cone-shaped lower half, one end of the upper half is bonded and fixed to the inner wall of the magnetic ring B, and the other end is connected to the end of the lower half with a smaller area, and the end of the lower half with a larger area is open. The lower half of the memory alloy stent has a hollow cutting structure so that it can be compressed under force outside the blood vessel lumen and expand after the force is removed.

[0014] In one embodiment, the hollow cutting structure allows the remaining bracket units to be X-shaped in a plane.

[0015] In one embodiment, the lower half is provided with a plurality of symmetrical barb structures along the circumferential direction on the outer wall, wherein the barb structures are memory alloy branches extending in a direction close to the magnetic ring B.

[0016] In one embodiment, the magnetically anastomosed aortic arch further comprises: a binding band, which is used to bind around the lumen of the blood vessel to fix the non-magnetic sleeve or memory alloy stent in the lumen to the inner wall of the lumen.

[0017] In one embodiment, the artificial blood vessel is a double-layer structure with poly (L-lactide-caprolactone) (PLCL) as the shell layer and sodium heparin as the core layer. The first magnetic ring is fixed between the double layers of the artificial blood vessel and is wrapped by the artificial blood vessel as a whole.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention adopts magnetic anastomosis to perform aortic arch replacement, which eliminates the need to sew up the anastomotic openings, simplifies the surgical operation, shortens the operation time, reduces the difficulty of the operation, and improves the surgical effect and safety.

[0020] The present invention does not require cardiac arrest, extracorporeal circulation, and cerebral hypothermic perfusion, thereby reducing surgical trauma and the risk of complications to the patient and facilitating the patient's recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the aortic arch anastomosis of the present invention.

[0023] Figure 3 It is a schematic diagram of the aortic arch anastomosis state of the present invention.

[0024] Figure 4 and Figure 5 Schematic diagram of magnetic ring structure 1 of the present invention.

[0025] Figure 6 It is a schematic diagram of the magnetic ring structure 2 of the present invention.

[0026] Figure 7 It is a schematic diagram (stereoscopic diagram) of the matching structure using a binding belt according to the present invention.

[0027] Figure 8 It is a schematic diagram (cross-sectional view) of the matching structure using a binding belt according to the present invention.

[0028] Figure 9 It is a schematic diagram (stereoscopic diagram) of the matching structure using a binding belt according to the present invention. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings and examples.

[0030] like Figure 1 and Figure 2As shown, the present invention is a magnetic anastomosis aortic arch, comprising four artificial blood vessels, a plurality of first magnetic rings 1, and a plurality of second magnetic rings 2. For the aortic arch, the four artificial blood vessels are the aortic vessel 32, the brachiocephalic trunk vessel 42, the left common carotid artery 52, and the left subclavian artery 62. Among them, the aortic vessel 32 is divided into the ascending aorta 321 and the descending aorta 322. One end of the brachiocephalic trunk vessel 42, one end of the left common carotid artery 52, and one end of the left subclavian artery 62 are sequentially connected to the aortic vessel 32 along the direction from the ascending aorta 321 to the descending aorta 322. The other end of the brachiocephalic trunk vessel 42 is the brachiocephalic trunk vessel anastomosis 421, the other end of the left common carotid artery vessel 52 is the left common carotid artery vessel anastomosis 521, the other end of the left subclavian artery vessel 62 is the left subclavian artery vessel anastomosis 621, one end of the ascending aorta 321 is the ascending aorta anastomosis 3211, and one end of the descending aorta 322 is the descending aorta anastomosis 3221, thus forming the five main anastomoses of the aortic arch.

[0031] Each first magnetic ring 1 is respectively arranged at the corresponding artificial vascular anastomosis, namely the brachiocephalic trunk vascular anastomosis 421, the left common carotid artery vascular anastomosis 521, the left subclavian artery vascular anastomosis 621, the ascending aorta anastomosis 3211 and the descending aorta anastomosis 3221. Each second magnetic ring 2 is respectively arranged at the corresponding human blood vessel stump, namely the brachiocephalic trunk vascular stump 422, the left common carotid artery vascular stump 522, the left subclavian artery vascular stump 622, the ascending aorta stump 3212 and the descending aorta stump 3222, as shown in FIG. Figure 3 As shown, the connection and anastomosis between the artificial blood vessel and the human blood vessel are achieved through the magnetic attraction between a first magnetic ring 1 and a second magnetic ring 2.

[0032] The working principle of the present invention is:

[0033] Before the operation, the artificial aortic arch and the five second magnetic rings 2 are sterilized separately and placed in a sterile container to maintain their sterility.

[0034] During the operation, the patient's chest is first cut open to expose the patient's aortic arch and its branches, and then the patient's ascending aorta, brachiocephalic trunk, left common carotid artery, subclavian artery and descending aorta are cut off respectively, and the patient's aortic arch and its branches are completely removed, leaving five incisions, that is, five broken ends of human blood vessels.

[0035] Then, five second magnetic rings 2 are taken out from the sterile container and fixed to the corresponding blood vessel stumps to prepare for rapid loading of the artificial aortic arch.

[0036] Next, the artificial aortic arch and its branches are placed in the patient's chest cavity, and the first magnetic rings 1 of the five artificial blood vessels are aligned with the second magnetic rings 2 loaded at the patient's vascular incision. The attraction between the magnetic rings is used to tightly adsorb them together to complete the replacement of the aortic arch.

[0037] Finally, the patient's chest incision is sutured and the operation is completed.

[0038] The invention uses a magnetic ring to perform rapid suture-free anastomosis, which has a fast anastomosis effect, a short time, and no bleeding. The invention can be used to perform artificial aortic arch replacement surgery without cardiac arrest or hypothermic perfusion, thereby reducing surgical complications and improving the success rate.

[0039] The axial length of the first magnetic ring 1 and the second magnetic ring 2 of the present invention is 3-5 mm, which meets the magnetic force requirements of the anastomosis without causing discomfort to the patient. Due to the different structural properties of arteries and veins, in specific embodiments of the present invention, the first magnetic ring 1 and the second magnetic ring 2 can each adopt one of the following structures, and the first magnetic ring 1 and the second magnetic ring 2 can have either the same structure or different structures.

[0040] Structure 1, such as Figure 4 and Figure 5 As shown, it includes a magnetic ring A101 and a non-magnetic sleeve 102. One end of the non-magnetic sleeve 102 is inserted into the inner ring of the magnetic ring A101, and the outer wall of the other end is provided with a plurality of ridges 103 along the circumference. The characteristic of this structure is that it can quickly fix the magnetic ring to the arterial stump, and the non-magnetic sleeve 102 can be fixed to the stump while the magnetic ring A101 is loaded.

[0041] Structure 2, such as Figure 6 As shown, it includes a magnetic ring B111 and a memory alloy stent 112. One end of the memory alloy stent 112 is connected to the inner wall of the magnetic ring B111, and the other end extends into the blood vessel lumen. This structure is characterized by the memory alloy stent 112 being placed into the vessel stump after contraction. The stent is then expanded to securely fix the stump, thereby completing the loading of the magnetic ring B111 on the arterial end. The stent is positioned by bonding the magnetic ring B111 to the memory alloy stent 112, and the magnetic ring is fixed to the vessel stump through compression and release of the stent.

[0042] Furthermore, the memory alloy stent 112 comprises a cylindrical upper portion and a truncated cone-shaped lower portion. One end of the upper portion is fixed to the inner wall of the magnetic ring B111 by bonding or other means, while the other end is connected to the smaller end of the lower portion. The larger end of the lower portion is open. The lower portion of the memory alloy stent 112 has a hollowed-out structure, allowing it to be compressed when subjected to force outside the blood vessel lumen and expand when the force is removed.

[0043] Specifically, the memory alloy stent 112 is made of nickel-titanium memory alloy through laser cutting. The upper half is cylindrical and can be directly fixed to the magnetic ring B111 without cutting. The lower half is truncated cone and requires hollowing. The remaining stent unit can be shaped like an X on a plane. It is deformable and can be compressed and expanded. The compressed stent can be more easily placed into the lumen. After the force is removed and expanded, the stent is firmly fixed in the lumen and is not easily moved, thereby quickly completing the magnetic ring loading at the arterial end.

[0044] In order to further prevent the movement of the bracket, the present invention can also set a number of memory alloy branches along the circumferential direction on the outer wall of the lower half. These branches extend toward the direction close to the magnetic ring B111 to form a barb structure 114. Obviously, these barb structures 114 are symmetrically arranged.

[0045] To further prevent the movement of the bracket, e.g. Figure 7 、 Figure 8 and Figure 9 As shown, the present invention may also include a binding band 113, which is used to bind around the outside of the blood vessel lumen to secure the non-magnetic sleeve 102 or the memory alloy stent 112 within the lumen to the inner wall of the lumen. For the former, the band can be tied between the flanges 103 or between the flange 103 and the magnetic ring A101. For the latter, the band can be tied at the larger end of the lower half or at the location of the barb structure 114.

[0046] In the present invention, to achieve the physiological function of the aortic arch, the artificial blood vessel adopts a coaxial electrospinning method and has a double-layer structure with poly (L-lactide-caprolactone) (PLCL) as the shell layer and sodium heparin as the core layer, thereby achieving better elasticity, support, and anticoagulant effect. The first magnetic ring 1 is fixed between the two layers of the artificial blood vessel and is completely wrapped by the artificial blood vessel. The specific fixing method can be: first, the core layer is completed by electrospinning, and then the first magnetic ring 1 is placed on the anastomotic end of the artificial blood vessel. A second layer of electrospinning is performed to complete the outer layer so that it completely covers the first magnetic ring 1.

[0047] The aortic arch of the present invention can firstly be rapidly replaced, reducing the surgical difficulty. Secondly, it can avoid suturing the anastomotic sites, reducing operative time and blood loss, and improving surgical efficacy and safety. Finally, it can avoid cardiac arrest, extracorporeal circulation, and hypothermic cerebral perfusion, reducing surgical trauma and the risk of complications.

[0048] The present invention can adapt to different types of aortic arch lesions, including aortic dissection, aortic aneurysm, aortic stenosis, etc., thereby expanding the scope of surgical application.

Claims

1. A magnetic anastomosis of an aortic arch, characterized in that: The invention comprises four artificial blood vessels and a plurality of second magnetic rings (2), wherein the anastomosis opening of each artificial blood vessel is respectively provided with a first magnetic ring (1), and each second magnetic ring (2) is respectively provided at the corresponding human blood vessel stump, and the connection and anastomosis between the artificial blood vessel and the human blood vessel is achieved through the magnetic attraction between one of the first magnetic rings (1) and one of the second magnetic rings (2).

2. The magnetic anastomosis of the aortic arch according to claim 1, characterized in that: The four artificial blood vessels are the aorta (32), the brachiocephalic trunk (42), the left common carotid artery (52) and the left subclavian artery (62). On the aorta (32), along the direction from the ascending aorta (321) to the descending aorta (322), one end of the brachiocephalic trunk (42), one end of the left common carotid artery (52) and one end of the left subclavian artery (62) are connected in sequence. The other end of the brachiocephalic trunk (42), the other end of the left subclavian artery (62) and the two ends of the aorta (32) serve as the anastomosis of the artificial blood vessels.

3. The magnetic anastomosis of the aortic arch according to claim 1, characterized in that: The axial lengths of the first magnetic ring (1) and the second magnetic ring (2) are 3-5 mm.

4. The magnetic anastomosis of the aortic arch according to claim 1, characterized in that: The first magnetic ring (1) and the second magnetic ring (2) adopt the following structure: It comprises a magnetic ring A (101) and a non-magnetic sleeve (102), wherein one end of the non-magnetic sleeve (102) is inserted into the inner ring of the magnetic ring A (101), and the outer wall of the other end is provided with a convex edge (103) along the circumferential direction.

5. The magnetic anastomosis of the aortic arch according to claim 1, characterized in that: The first magnetic ring (1) and the second magnetic ring (2) adopt the following structure: It comprises a magnetic ring B (111) and a memory alloy bracket (112), wherein one end of the memory alloy bracket (112) is connected to the inner wall of the magnetic ring B (111), and the other end extends into the lumen of the blood vessel.

6. The magnetic anastomosis of the aortic arch according to claim 5, characterized in that: The memory alloy support (112) comprises a cylindrical upper half and a truncated cone-shaped lower half, one end of the upper half being bonded and fixed to the inner wall of the magnetic ring B (111), and the other end being connected to the end of the lower half with a smaller area, while the end of the lower half with a larger area is in an open state. The lower half of the memory alloy support (112) has a hollow cutting structure so that it can be compressed when subjected to force outside the blood vessel lumen and expand after the force is removed.

7. The magnetic anastomosis of the aortic arch according to claim 6, characterized in that: The hollow cutting structure makes the remaining bracket units present an X shape on a plane.

8. The magnetic anastomosis of the aortic arch according to claim 6 or 7, characterized in that: The lower half is provided with a plurality of symmetrical barb structures (114) along the circumferential direction on the outer wall thereof. The barb structures (114) are memory alloy branches extending in a direction close to the magnetic ring B (111).

9. The magnetic anastomosis of the aortic arch according to claim 4, 5, 6 or 7, characterized in that: Also includes: A binding band (113) is used for binding around the lumen of a blood vessel outside the lumen to fix the non-magnetic sleeve (102) or the memory alloy bracket (112) in the lumen to the inner wall of the lumen.

10. The magnetic anastomosis of the aortic arch according to claim 1, characterized in that: The artificial blood vessel is a double-layer structure with poly (L-lactide-caprolactone) as the shell layer and sodium heparin as the core layer. The first magnetic ring (1) is fixed between the double layers of the artificial blood vessel and is entirely wrapped by the artificial blood vessel.

Images