An artificial blood vessel anastomosis device

Abstract

This invention discloses an artificial blood vessel anastomosis device, relating to the field of artificial blood vessel technology. The invention includes an anastomosis device body, with a shaping device rod channel formed on the inner wall of the anastomosis device body. A pin seat is fixed to one side of the anastomosis device body. A shaping device rod is inserted into the inner wall of the shaping device rod channel. A shaping head is fixed to one end of the shaping device rod. A shaping head support ring is fixed to the outer wall of the shaping device rod. A pin ejection hole is provided on the inner wall of the anastomosis device body, and a pin ejection slot is fixedly inserted through the side of the pin ejection hole. This invention connects and fixes the pre-fitted artificial blood vessel end of the staple cartridge to the shaping head support ring. Then, the staple cartridge end is aligned and fixed with the pre-placed external clip. Finally, pressing the anastomosis device firing handle fires the anastomotic staples. This allows for the connection and anastomosis of the aorta and artificial blood vessel within minutes, significantly reducing the current surgical time.

Description

Technical Field

[0001] This invention relates to the field of artificial blood vessel technology, specifically to an artificial blood vessel anastomosis device. Background Technology

[0002] Aortic dissection is an extremely dangerous vascular disease, mainly manifested as sudden, severe chest and back pain and a tear in the blood vessel. At this time, the blood vessel will be torn open to form two channels, the true lumen and the false lumen. The original normal blood vessel channel is called the true lumen, and the newly torn abnormal channel is called the false lumen. The two may be separated by the torn blood vessel wall (intima flap), or blood may flow between the two channels. In this case, thrombus is easy to form, just like the sludge that accumulates at the broken water pipe, which further affects the normal flow of blood. In aortic dissection, severe vascular inflammation leads to tissue fragility, making it highly susceptible to needle punctures and bleeding during surgery, or massive hemorrhage under high pressure after cardiac restart, which cannot be controlled. Therefore, type A aortic dissection has always been one of the most difficult surgeries in cardiac surgery, with a high complication rate and mortality rate to date. Furthermore, the level of treatment varies greatly across different regions. Due to the complexity of aortic dissection, no surgical technique has yet been able to eliminate surgical mortality to the greatest extent and be accepted by cardiovascular surgeons in various regions. Moreover, the high risk and high mortality rate of the surgery make it difficult to train young doctors.

[0003] However, current artificial vascular anastomosis devices have the following problems: 1. Anastomosis of the proximal and distal aorta takes several hours, which significantly increases the time of cardiopulmonary bypass and deep hypothermic circulatory arrest, leading to a substantial increase in related surgical complications; or because the anastomosis technique is not standardized, it often directly leads to poor anastomosis, resulting in severe bleeding and patient death. The existing artificial vascular ring technology using a titanium alloy rigid ring and an external nylon ligature still has several key drawbacks in clinical application: First, the success rate of sutureless anastomosis is not 0%, and a small number of cases still fail, forcing a switch to manual suturing; Second, although the operation time is shortened, the incidence of postoperative neurological complications such as stroke and paraplegia has not been significantly reduced; Third, the long-term retention of the rigid ring leads to decreased vascular compliance and has stringent requirements for aortic diameter matching, and improper sizing can cause anastomotic deformation or late endoleak; Fourth, the external nylon ligature poses a risk of cutting and tissue tearing on fragile dissected aortic walls; Fifth, and most importantly, this device has a single function, only enabling end-to-end connection. It completely lacks the ability to actively reshape and repair complex lesions such as aortic root aneurysm, sinus junction (STJ) dilation caused by Marfan syndrome, and aortic valve insufficiency. Related operations still rely entirely on the surgeon's personal experience, resulting in inconsistent surgical quality and making it difficult to promote to primary hospitals. Therefore, this application utilizes an anastomosis device that connects the aortic wall and the artificial blood vessel via the anastomosis seat and the anastomosis cartridge, and then fires the anastomosis staples to fasten the two together. This can greatly reduce the operation time of current type A aortic dissection, standardize surgical techniques, reduce surgical complications, improve patient survival rate, and improve patient prognosis. At the same time, it can standardize the shaping of the sinus junction dilation, the initiating factor of aortic valve regurgitation, and avoid the subjective inconsistency of different surgeons, thereby ensuring the smooth progress of the operation. Thus, an artificial blood vessel anastomosis device is designed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an artificial blood vessel anastomosis device, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an artificial blood vessel anastomosis device, comprising an anastomosis device body, wherein a shaping device rod channel is formed on the inner wall of the anastomosis device body, an anvil is fixed on one side of the anastomosis device body, a shaping device rod is inserted into the inner wall of the shaping device rod channel, a shaping head is fixed at one end of the shaping device rod, a shaping head support ring is fixed on the outer wall of the shaping device rod, a nail outlet hole is provided on the inner wall of the anastomosis device body, a nail ejection groove is fixedly passed through the side of the nail outlet hole, a nail needle is provided on the inner wall of the nail ejection groove, and an anastomosis device firing handle is provided on the outer wall of the anastomosis device body for driving the shaping head support ring and the nail ejection groove of the anastomosis device.

[0006] According to the above technical solution, the side of the anvil seat is provided with a plurality of nail tip bending blocks, and the side of the anvil seat is provided with an annular mating groove.

[0007] According to the above technical solution, the stapler's stapler slot and staple needle are located in the stapler hole.

[0008] According to the above technical solution, the outer wall of the end of the shaping device rod away from the shaping head is threaded, and the inner wall of the stapler body can be inserted into a wing nut to be fixed with the thread of the shaping device rod.

[0009] According to the above technical solution, the thread on the outer wall of the shaping device rod is located on the displacement trajectory of the internal thread of the wing nut.

[0010] According to the above technical solution, all the staples are located inside the staple delivery groove of the stapler.

[0011] According to the above technical solution, the outer wall of the anvil is fixed with an external buckle.

[0012] According to the above technical solution, the outer wall of the stapler body is provided with a retainer for fixing the stapler firing handle.

[0013] This invention provides an artificial blood vessel anastomosis device. It has the following beneficial effects: (1) The present invention, through the setting of the stapler body, stapler firing handle, shaping device rod channel, anvil, outer buckle, wing nut, shaping device rod, shaping head, shaping head support ring, stapler staple ejection groove, staple needle, and staple ejection hole, connects and fixes the staple cartridge end with the pre-fitted artificial blood vessel to the shaping head support ring, then aligns and fixes the staple cartridge end with the placed outer buckle, and finally presses the stapler firing handle to fire the staples. The aortic blood vessel and the artificial blood vessel can be connected and anastomosed within a few minutes, greatly reducing the current required operation time.

[0014] (2) The present invention uses the setting of the stapler, staples, and staple holes to firmly staple the four layers of tissues of bovine pericardium, artificial blood vessel, aortic wall and bovine pericardium together, so as to realize the eversion anastomosis of aortic blood vessel and artificial blood vessel. The staples and bovine pericardial patch are sutured tightly and with moderate tightness, which can effectively eliminate bleeding from the anastomosis between the aorta and the artificial blood vessel, minimize intraoperative bleeding, shorten the operation time to the maximum extent, and reduce the incidence of postoperative complications and mortality.

[0015] (3) The present invention uses the setting of the anastomosis device firing handle, the nail tip bending block and the ring body mating groove. Pressing the anastomosis device firing handle fires the anastomosis nail, which firmly nails the four layers of tissues of bovine pericardium-artificial blood vessel-aortic wall-bovine pericardium together, realizing the eversion anastomosis of aortic blood vessel and artificial blood vessel. The anastomosis nail and bovine pericardial patch are sutured tightly and with moderate tightness, which can effectively eliminate bleeding from the anastomosis between the aorta and the artificial blood vessel, minimize intraoperative bleeding, shorten the operation time to the maximum extent, and reduce the incidence of postoperative complications and mortality.

[0016] (4) The anastomosis method of the present invention ensures a tight fit between the aortic blood vessel and the artificial blood vessel. By ensuring appropriate tension of the blood vessel before anastomosis, compacting the tissue, and uniform speed and verticality during anastomosis, the distribution of anastomotic staples is ensured to be uniform and regular in shape. The ability of the anastomosis to withstand blood flow pressure is greatly enhanced, thus ensuring one-time formation, greatly reducing or eliminating bleeding during and after surgery, greatly improving the success rate of surgery, and making the operation simple and convenient, reducing the difficulty of surgery for the surgeon, standardizing the surgical technique, lowering the technical threshold of aortic dissection surgery, benefiting patients, and reducing the occurrence of needle loss and unexpected situations of disease transmission through blood due to complex operation, further improving the safety of surgery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire invention; Figure 2 This is a schematic diagram of the structure of the shaping head support ring of the present invention; Figure 3This is a schematic diagram of the structure of the shaping device rod of the present invention; Figure 4 This is a schematic diagram of the structure at the nail hole of the present invention; Figure 5 This is a schematic diagram of the structure of the nail pin in this invention; Figure 6 This is a schematic diagram of the structure of the anvil seat in this invention; Figure 7 This is a schematic diagram of the structure of the annular mating groove of the present invention.

[0018] In the diagram: 1. Anastomosis device body; 2. Anastomosis device firing handle; 3. Shaper rod channel; 4. Anchor seat; 5. External buckle; 6. Wing nut; 7. Shaper rod; 8. Shaper head; 9. Shaper head support ring; 11. Anastomosis device staple ejection groove; 12. Staple; 14. Staple ejection hole; 16. Staple tip bending block; 17. Ring body mating groove. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Please see Figures 1-7One embodiment of the present invention is: an artificial vascular anastomosis device, comprising an anastomosis device body 1, which is a disposable item to reduce cross-infection and correct aortic valve damage and regurgitation initiation factors from the source, and standardizes surgical operation to avoid serious complications such as bleeding. The anastomosis device body 1 has a shaping device rod channel 3 on its inner wall, an anvil 4 is fixed to one side of the anastomosis device body 1, and an external buckle 5 is fixed to the outer wall of the anvil 4. A shaping device rod 7 is inserted into the inner wall of the shaping device rod channel 3, a shaping head 8 is fixed to one end of the shaping device rod 7, and a shaping head 8 is fixed to the outer wall of the shaping device rod 7. The stapler body 1 has a head support ring 9. The inner wall of the stapler body 1 has a staple outlet hole 14 with a length of 7.55 mm. Four buckles are fixed to the outer wall of the staple outlet hole 14, corresponding to four slots on the outer wall of the stapler body 1. The buckles are trapezoidal in shape, with a length of 0.5 mm on the side furthest from the staple outlet hole 14 and a length of 2 mm on the side closest to the staple outlet hole 14. The slots are 2 mm long. A staple ejection groove 11 is fixedly inserted through the side of the staple outlet hole 14. The inner wall height of the staple ejection groove 11 is 4 mm, and a staple needle 12 is provided on the inner wall of the staple ejection groove 11. The outer wall of the stapler body 1 has a drive mechanism. The shaping head support ring 9 and the stapler firing handle 2, which moves with the stapler staple ejection groove 11, are connected. The stapler staple ejection groove 11 and the staple needle 12 are located in the hole of the staple ejection hole 14. The outer wall of the shaping head 7, away from the shaping head 8, is threaded. The inner wall of the stapler body 1 can be inserted into the butterfly nut 6 and fixed to the thread of the shaping head 7. The thread on the outer wall of the shaping head 7 is located on the displacement trajectory of the inner thread of the butterfly nut 6. With the above structure, by placing the shaping head 8 into the vascular lumen of the aortic root and adjusting its position to the STJ level of the sinus junction, that is, the junction of the three junctional valves of the aortic valve with the aortic wall, the shaping head 8 can be placed into the vascular lumen of the aortic root. Above, the anvil 4 of the stapler body 1 is then fixed at the same level as the adventitia of the aorta (i.e., the adventitia position corresponding to the sinus junction) by the external buckle 5. At this time, the aortic wall is flipped outward to fix the edge of the anastomosis of the ascending aorta. At the same time, the stapler stapling groove 11, which has been pre-fitted with the artificial blood vessel, is connected and fixed to the shaping head support ring 9. Then, the stapler stapling groove 11 is aligned and fixed with the already placed external buckle 5. Finally, the stapler firing handle 2 is pressed to fire the staples. The aortic blood vessel and the artificial blood vessel can be connected and anastomosed within a few minutes, greatly reducing the current required operation time.

[0021] The anvil seat 4 has several nail tip bending blocks 16 on its side, and a ring-shaped mating groove 17 is formed on its side. The nail 12 is located inside a portion of the stapler's nail ejection groove 11. An external buckle 5 is fixed to the outer wall of the anvil seat 4, and a retainer for fixing the stapler firing handle 2 is provided on the outer wall of the stapler body 1. With the above structure, a ring of bovine pericardium is pre-placed on both the anvil seat 4 and the stapler nail ejection groove 11. By pressing the stapler firing handle 2, the staples are fired, and the staples firmly staple the four layers of tissue—bovine pericardium, artificial blood vessel, aortic wall, and bovine pericardium—together, achieving an eversion anastomosis between the aortic blood vessel and the artificial blood vessel. The staples, combined with the bovine pericardium patch, provide tight and moderate sutures, effectively eliminating bleeding from the anastomosis between the aorta and the artificial blood vessel. This method minimizes intraoperative bleeding, shortens surgical time, and reduces postoperative complications and mortality. After the shaping head 8 is inserted and positioned at the "STJ" level of the sinus junction, the anvil 4 and external buckle 5 are used to fix it at the corresponding level of the aortic adventitia. Using the mechanical force of the buckle, the edge of the aortic stump is flipped outward, turning the intima, which was originally inside the lumen, into the outer surface. The artificial blood vessel is placed into the staple cartridge, leaving a portion of the artificial blood vessel to be manually flipped onto the anastomotic staple. The width between the flipped artificial blood vessel and the aortic wall is approximately 5 mm. Pressing the handle fires the anastomotic staple to complete the anastomosis. This operation changes the inherent mode of inversion anastomosis used in other specialized tissue anastomosis devices. The intima of the anastomosis site is smooth, with no tissue leakage or residue, reducing the incidence of postoperative thrombosis.

[0022] In use, during type A aortic dissection surgery, after establishing cardiopulmonary bypass and stopping the heart, the diseased ascending aorta is removed. The shaping head 8 is inserted into the aortic vessel lumen at the root, adjusted to the level of the sinus junction, i.e., above the three junctions of the aortic valve. Then, the anvil 4 is fixed to the same level as the aortic adventitia using the external clip 5, causing the aortic wall to flip outward. At this point, the ascending aortic anastomosis level is fixed. The exit hole 14, with the artificial blood vessel already fitted inside, is placed on the shaping head support ring 9 and fixed, then aligned and fixed with the external clip 5. Pressing the anastomosis device firing handle 2 fires the anastomosis staple in the staple delivery slot 11. The staple is continuously and uniformly pushed through the bovine pericardium, artificial blood vessel, aortic intima, media, and adventitia on the side of the staple delivery slot 11, as well as the anvil 4. The pericardium of the cow is removed from the side and rotated and compressed in the recess of the anvil 4 to form a firm seal. The four layers of tissue—the pericardium, the artificial blood vessel, the aortic wall, and the pericardium—are then anchored together, causing the aortic and artificial blood vessels to evert and anastomose. Then, excess artificial blood vessels and aortic walls are cut off along the edges of the anvil 4 and the outer clip 5. At this point, the everted artificial blood vessel and aortic wall are about 5mm wide. The two artificial blood vessel ends are then continuously anastomosed using 4-0 polypropylene sutures, completing the main part of the surgery. Next, an 8mm diameter stapler is used to anastomose the left common carotid artery and the 8mm artificial blood vessel, and a mm diameter stapler is used to anastomose the right brachiocephalic artery and the mm artificial blood vessel. Finally, the ends of the artificial blood vessels and the corresponding diameter artificial blood vessel branches on the four-branch aortic artificial blood vessels are continuously anastomosed using 5-0 polypropylene sutures.

[0023] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An artificial blood vessel anastomosis device, comprising an anastomosis device body (1), characterized in that: The inner wall of the stapler body (1) is provided with a shaping rod channel (3). A pin seat (4) is fixed on one side of the stapler body (1). A shaping rod (7) is inserted into the inner wall of the shaping rod channel (3). A shaping head (8) is fixed at one end of the shaping rod (7). A shaping head support ring (9) is fixed on the outer wall of the shaping rod (7). A pin outlet hole (14) is provided on the inner wall of the stapler body (1). A staple ejection groove (11) is fixed through the side of the pin outlet hole (14). A staple needle (12) is provided on the inner wall of the staple ejection groove (11). A staple firing handle (2) is provided on the outer wall of the stapler body (1) to drive the shaping head support ring (9) and the staple ejection groove (11) to move.

2. The artificial blood vessel anastomosis device according to claim 1, characterized in that: The anvil (4) has several nail tip bending blocks (16) on its side, and the anvil (4) has an annular mating groove (17) on its side.

3. The artificial blood vessel anastomosis device according to claim 2, characterized in that: The stapler's stapler slot (11) and stapler needle (12) are located in the hole of the stapler hole (14).

4. The artificial blood vessel anastomosis device according to claim 3, characterized in that: The outer wall of the end of the shaping device rod (7) away from the shaping head (8) is threaded, and the inner wall of the stapler body (1) can be inserted into the wing nut (6) and fixed with the thread of the shaping device rod (7).

5. The artificial blood vessel anastomosis device according to claim 4, characterized in that: The thread on the outer wall of the shaping rod (7) is located on the displacement trajectory of the thread inside the wing nut (6).

6. The artificial blood vessel anastomosis device according to claim 5, characterized in that: All of the staples (12) are located inside the staple delivery slot (11) of the stapler.

7. The artificial blood vessel anastomosis device according to claim 6, characterized in that: The outer wall of the anvil (4) is fixed with an outer buckle (5).

8. The artificial blood vessel anastomosis device according to claim 7, characterized in that: The outer wall of the stapler body (1) is provided with a retainer for fixing the stapler firing handle (2).

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