A type of cassette-type vascular anastomosis device

Abstract

This application relates to a clip-type vascular anastomosis device, comprising an inner ring fitted onto one end of a blood vessel and an outer ring fitted around the outer side of the inner ring; the outer ring is provided with a plurality of connectors and connector slots corresponding one-to-one with the connectors for insertion into connectors on another outer ring; a vascular gap exists between the inner ring and the outer ring for insertion after the blood vessel is everted. This application features a semi-automatic docking method using clips during vascular anastomosis, allowing the interiors of two broken blood vessels to abut against each other, thereby completing the anastomosis without the need for additional sutures, reducing the workload of vascular anastomosis personnel, and exhibiting lower damage to the blood vessel compared to existing technologies.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a card-type vascular anastomosis device. Background Technology

[0002] Vascular anastomosis is a crucial surgical procedure, playing an irreplaceable role in vascular injury repair, tissue and organ transplantation, and revascularization. To minimize the warm ischemia time of tissues and organs, vascular anastomosis needs to be performed quickly and efficiently.

[0003] To minimize the difficulty of vascular suturing and the damage it causes to blood vessels, sutureless vascular anastomosis techniques have been developed. Among existing technologies, vascular adhesives, primarily fibrin glue, offer advantages such as supporting cell growth, non-toxicity, complete absorbability, good biocompatibility, and controllable coagulation and degradation times. However, fibrin glue also suffers from poor mechanical strength, the formation of antibodies against fibrinogen and thrombin, leading to coagulopathy and bleeding, and a high risk of vascular embolism. Vascular welding is simple and convenient, but during anastomosis, electrocoagulation forceps often adhere to the coagulated protein tissue, easily causing anastomotic dehiscence when the forceps are removed. Furthermore, the anastomotic strength is poor, usually requiring appropriate vascular suturing. However, it is unsuitable for anastomosing thick-walled vessels, atherosclerotic vessels, and vessels with a diameter less than 0.5 mm. Vascular anastomosis clips are simple in design and easy to operate, but improper clamping force can lead to anastomotic stenosis or even rupture. The unique advantage of magnetic vascular anastomosis rings lies in their ability to automatically and precisely align, significantly reducing human error. However, once the magnetic ring is anastomosed with a blood vessel, it cannot be removed or degraded, and the resulting magnetic interference will affect future magnetic resonance imaging examinations that the patient may need.

[0004] Regarding the aforementioned technologies, the inventors believe there is a need for a vascular anastomosis method that is less difficult to operate and causes less damage to blood vessels. Utility Model Content

[0005] To simplify vascular anastomosis procedures and minimize vascular damage, this application provides a card-type vascular anastomosis device.

[0006] The card-type vascular anastomosis device provided in this application adopts the following technical solution:

[0007] A cassette-type vascular anastomosis device includes an inner ring disposed on one end of a blood vessel and an outer ring disposed outside the inner ring; the outer ring is provided with a plurality of connectors and a connector groove corresponding to each connector and used for connectors on another outer ring to be inserted; there is a vascular gap between the inner ring and the outer ring for inserting the blood vessel after eversion.

[0008] By adopting the above technical solution, during the anastomosis of blood vessels, the two broken blood vessels are brought together internally by a semi-automatic docking method using snap-fit, thereby completing the anastomosis without the need for additional sutures, reducing the work efficiency of vascular anastomosis personnel, and causing less damage to blood vessels compared to existing technologies.

[0009] Optionally, the inner ring has a plurality of locking heads on the side away from the blood vessel, and the outer ring has locking rods corresponding to the locking heads one by one, with locking slots on the locking rods for the locking heads to engage.

[0010] By adopting the above technical solution, the connection relationship between the inner ring and the outer ring is disclosed. The connection is relatively stable through the snap-fit ​​connection between the card head and the card slot. Moreover, the operation is relatively simple during the connection process, further reducing the difficulty of the operator's work.

[0011] Optionally, the card head is provided with a first engaging sliding surface on the side near the outer ring, and the card rod is provided with a second engaging sliding surface that cooperates with the first engaging sliding surface on the side near the inner ring.

[0012] By adopting the above technical solution, the first and second card-connecting sliding surfaces make it easier for the card head to enter the card slot. The operator does not need to pry open the card lever before snapping it in, making the operation more convenient and further reducing the probability of blood vessel damage.

[0013] Optionally, it also includes an installation rod for assisting in everting the blood vessel to wrap around the outer wall of the inner ring. The installation rod includes a hollow sleeve and an operating rod located on the side of the sleeve away from the inner ring. The inner diameter of the sleeve is larger than the outer diameter of the inner ring plus the wall thickness of the blood vessel sleeved on the outer side of the inner ring and is used to assist in everting the blood vessel to wrap around the outer wall of the inner ring.

[0014] By adopting the above technical solution, the installation rod eliminates the need for operators to manually evert the blood vessels, reducing the difficulty of operation and increasing the efficiency of vascular anastomosis.

[0015] Optionally, a snap-fit ​​block is provided in the plug slot, and a snap-fit ​​slot is provided on the plug for the snap-fit ​​block to snap into.

[0016] By adopting the above technical solution, the connection strength between the two outer rings is further increased under the action of the snap-fit ​​block and snap-fit ​​groove, reducing the probability of the two outer rings falling off.

[0017] Optionally, the snap-fit ​​block has a first mounting surface on the side near the other outer ring, and the connector has a second mounting surface that mates with the first mounting surface on the side near the other outer ring.

[0018] By adopting the above technical solution, the first mounting surface and the second mounting surface make it easier for the snap-fit ​​block to enter the snap-fit ​​groove. The operator does not need to pry open the connector before snapping it in, making the operation more convenient and further reducing the probability of blood vessel damage.

[0019] Optionally, the inner ring further includes a first snap-fit ​​strip and a first mounting groove for snapping the first snap-fit ​​strip; the first snap-fit ​​strip has a first snap-fit ​​spring piece, and the side wall of the first mounting groove has a plurality of first snap-fit ​​openings for the first snap-fit ​​spring piece to snap into; the outer ring further includes a second snap-fit ​​strip and a second mounting groove for snapping the second snap-fit ​​strip; the second snap-fit ​​strip has a second snap-fit ​​spring piece, and the side wall of the second mounting groove has a plurality of second snap-fit ​​openings for the second snap-fit ​​spring piece to snap into.

[0020] By adopting the above technical solution, the first snap-fit ​​spring is snapped into different first snap-fit ​​openings, allowing the inner diameter of the inner ring to be manually adjusted. This enables it to fit blood vessels of different diameters, thus increasing its applicability. At the same time, by snapping the second snap-fit ​​spring into different second snap-fit ​​openings, the inner diameter of the outer ring can be manually adjusted to accommodate inner rings of different inner diameters. This eliminates the need to use different outer rings when the inner diameter of the inner ring changes, further improving the applicability of the outer ring.

[0021] Optionally, an adhesive layer for vascular adhesion is provided on the outer wall of the inner ring.

[0022] By adopting the above technical solution, the blood vessel can be tightly attached to the outer wall of the inner ring under the action of the adhesive layer, reducing the difficulty of outer ring fitting caused by blood vessel movement when the outer ring is fitted onto the inner ring.

[0023] Optionally, both the inner ring and the outer ring are made of polylactic acid.

[0024] By adopting the above technical solution, polylactic acid (PLA) is a material with a certain degree of hardness, which can provide some support for the anastomosis and reduce the occurrence of anastomotic stenosis. At the same time, PLA can be decomposed by the human body and has little harm to the human body. After vascular anastomosis, it can be decomposed by the human body and does not need to be removed by surgery.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. During the anastomosis of blood vessels, a semi-automatic docking method using snap-fit ​​allows the interiors of two broken blood vessels to abut against each other, thereby completing the anastomosis without the need for additional sutures, reducing the work efficiency of vascular anastomosis personnel, and causing less damage to blood vessels compared to existing technologies.

[0027] 2. By attaching the first snap-fit ​​spring to different first snap-fit ​​openings, the inner diameter of the inner ring can be manually adjusted, allowing it to fit blood vessels of different diameters, thus increasing its applicability. At the same time, by attaching the second snap-fit ​​spring to different second snap-fit ​​openings, the inner diameter of the outer ring can be manually adjusted, thus adapting to inner rings of different inner diameters. Therefore, it is not necessary to use different outer rings when the inner diameter of the inner ring changes, further improving the applicability of the outer ring.

[0028] 3. Polylactic acid (PLA) is a material with a certain degree of hardness, which can provide some support for the anastomosis and reduce the occurrence of anastomotic stenosis. At the same time, PLA can be decomposed by the human body and has little harm to the human body. After vascular anastomosis, it can be decomposed by the human body and does not need to be removed by surgery. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a cassette-type vascular anastomosis device;

[0030] Figure 2 It is an exploded view of the inner and outer rings;

[0031] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 yes Figure 2 Enlarged view at point B in the middle;

[0033] Figure 5 This is a structural diagram of the mounting rod and the inner ring.

[0034] Explanation of reference numerals in the attached drawings: 1. Inner ring; 11. Clip head; 111. First snap-fit ​​sliding surface; 12. Adhesive layer; 13. First snap-fit ​​strip; 131. First snap-fit ​​spring; 14. First mounting groove; 141. First snap-fit ​​opening; 2. Outer ring; 21. Clip rod; 211. Second snap-fit ​​sliding surface; 212. Clip opening; 22. Plug-in connector; 221. Second mounting curved surface; 222. Snap-fit ​​groove; 23. Plug-in groove; 231. Snap-fit ​​block; 232. First mounting curved surface; 24. Second snap-fit ​​strip; 241. Second snap-fit ​​spring; 25. Second mounting groove; 26. Second snap-fit ​​opening; 3. Mounting rod; 31. Sleeve; 32. Operating rod. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0036] This application discloses a card-type vascular anastomosis device.

[0037] Reference Figure 1 and Figure 2A type of vascular anastomosis device includes an inner ring 1, an outer ring 2 sleeved on the outside of the inner ring 1 and snapped into the inner ring 1, and an mounting rod 3 for everting and wrapping the blood vessel to the outer wall of the inner ring 1. In this embodiment, there are two inner rings 1 and two outer rings 2, and two adjacent outer rings 2 are connected by a snap-fit ​​structure. The inner ring 1 and the outer ring 2 are both made of polylactic acid, which has high hardness, can be decomposed by the human body, and has low harm to the human body. There is a gap between the inner ring 1 and the outer ring 2 for inserting the blood vessel after eversion.

[0038] Reference Figure 2 and Figure 3 After installation, the inner ring 1 has a hollow tubular structure. To facilitate adjustment of the diameter of the inner ring 1, a first snap-fit ​​strip 13 is provided on one side of the inner ring 1, and several first mounting grooves 14 are provided on the other side of the inner ring 1 for snapping the first snap-fit ​​strip 13. A first snap-fit ​​spring 131 is provided on the side of the first snap-fit ​​strip 13 away from the blood vessel. Several first snap-fit ​​openings 141 are provided on the sidewall of the first mounting groove 14 for snapping the first snap-fit ​​spring 131. To accommodate blood vessels of different diameters, the inner diameter of the inner ring 1 is controlled by snapping the first snap-fit ​​spring 131 into different first snap-fit ​​openings 141. Several snap heads 11 are provided on the outer sidewall of the inner ring 1. In this embodiment, three first snap-fit ​​openings 141 are provided in the first mounting groove 14, allowing the operator to adjust the inner diameter of the inner ring 1 to be larger than the outer diameter of the blood vessel, and facilitating the insertion of the blood vessel into the inner ring 1. To facilitate stability after the blood vessel eversion, an adhesive layer 12 for blood vessel adhesion is coated on the outer wall of the inner ring 1. Two opposing locking heads 11 are provided on the outer wall of the inner ring 1. The locking head 11 has an arc-shaped first locking sliding surface 111 on the side near the outer ring 2.

[0039] Reference Figure 2 and Figure 4After installation, the outer ring 2 is circular. To facilitate adjustment of the diameter of the outer ring 2, a second snap-fit ​​strip 24 is provided on one side of the outer ring 2, and several second mounting grooves 25 are provided on the other side of the outer ring 2 for snapping the second snap-fit ​​strip 24. The second snap-fit ​​strip 24 has a second snap-fit ​​spring piece 241 on the side away from the inner ring 1. Several second snap-fit ​​openings 26 are also provided on the side wall of the second mounting groove 25 for snapping the second snap-fit ​​spring piece 241. In order to accommodate inner rings 1 with different diameters, the inner diameter of the outer ring 2 is controlled by snapping the second snap-fit ​​spring piece 241 into different second snap-fit ​​openings 26. One end of the outer ring 2 is provided with several snap rods 21 corresponding to the snap heads 11, and the other end of the outer ring 2 is provided with several plugs 22. The outer side wall of the outer ring 2 has plug grooves 23 corresponding to the plugs 22 for insertion. In this embodiment, the second mounting groove 25 has three second snap-fit ​​openings 26 for the operator to adjust the inner diameter of the outer ring 2 to be larger than the diameter of the inner ring 1, whose outer wall covers the blood vessel wall. During installation, the outer ring 2 is fitted onto the inner ring 1, which covers the blood vessel wall, from the side where the blood vessel is broken. The number and position of the snap rods 21 correspond one-to-one with the snap heads 11. The side of the snap rod 21 away from the outer ring 2 has an arc-shaped second snap-fit ​​sliding surface 211, which facilitates the installation of the snap heads 11 on the inner ring 1. The side of the snap rod 21 away from the outer ring 2 also has a through-hole for snapping the snap heads 11. There are two insertion grooves 23, and each insertion groove 23 has a snap-fit ​​block 231 for snapping onto the insertion connector 22. The snap-fit ​​block 231 has an arc-shaped first mounting surface 232 on the side near the other outer ring 2. The connector 22 corresponds one-to-one with the connector slot 23. The side of the connector 22 away from the outer ring 2 has an arc-shaped second mounting surface 221, which facilitates the installation of the snap-fit ​​block 231. During the installation process, the first mounting surface 232 and the second mounting surface 221 cooperate with each other. The side of the connector 22 away from the outer ring 2 has a snap-fit ​​slot 222 for snap-fitting and fixing the snap-fit ​​block 231.

[0040] Reference Figure 1 and Figure 5 The mounting rod 3 includes a sleeve 31 and an operating rod 32 mounted on one side of the sleeve 31. In this embodiment, the sleeve 31 has a hollow structure, and the inner diameter of the sleeve 31 is larger than the diameter of the inner ring 1, whose outer wall surrounds the blood vessel wall. In this embodiment, when it is necessary to evert the blood vessel to the outer wall of the inner ring 1, after cutting the blood vessel, the operator uses the operating rod 32 to place the sleeve 31 over the outer wall of the inner ring 1. For ease of operation, the operator needs to cut the blood vessel into several segments before placing the operating rod 32 over the outer wall of the inner ring 1.

[0041] The implementation principle of a card-type vascular anastomosis device in this application is as follows:

[0042] 1. Adjust the inner diameter of the inner ring 1 and the outer ring 2 to a suitable size, place the inner ring 1 on one side of the disconnected blood vessel, and leave a certain length;

[0043] 2. Cut the reserved blood vessel into four pieces and attach them to the outer wall of the inner ring 1 under the action of the mounting rod 3;

[0044] 3. Place the outer ring 2 on the outside of the inner ring 1, and place the everted blood vessel in the blood vessel gap between the outer ring 2 and the inner ring 1. Connect the outer ring 2 and the inner ring 1 by connecting the clip 11 and the clip 212.

[0045] 4. The severed blood vessel at the other end is reconnected in the same manner as described above;

[0046] 5. The outer ring 2 installed at both ends of the blood vessels is connected to the locking block 231 by locking groove 222. After the connection is completed, the inner lining of the ruptured blood vessel comes into contact with the inner lining, thereby completing the anastomosis of the blood vessel without the need for sutures. The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cassette-type vascular anastomosis device, characterized in that, It includes an inner ring (1) fitted onto one end of a blood vessel and an outer ring (2) fitted onto the outside of the inner ring (1); the outer ring (2) is provided with a plurality of connectors (22) and a connector groove (23) corresponding to each connector (22) and used for insertion of the connector (22) on another outer ring (2); there is a blood vessel gap between the inner ring (1) and the outer ring (2) for insertion after the blood vessel is everted.

2. The cassette-type vascular anastomosis device according to claim 1, characterized in that, The inner ring (1) is provided with a plurality of clips (11) on the side away from the blood vessels, and the outer ring (2) is provided with clips (21) corresponding to the clips (11) one by one, and the clips (21) are provided with slots (212) for the clips (11) to be engaged.

3. The cassette-type vascular anastomosis device according to claim 2, characterized in that, The card head (11) has a first engaging sliding surface (111) on the side near the outer ring (2), and the card rod (21) has a second engaging sliding surface (211) on the side near the inner ring (1) that cooperates with the first engaging sliding surface (111).

4. The cassette-type vascular anastomosis device according to claim 1 further includes a mounting rod (3) for assisting in everting and wrapping the blood vessel to the outer wall of the inner ring (1), characterized in that, The mounting rod (3) includes a hollow sleeve (31) and an operating rod (32) located on the side of the sleeve (31) away from the inner ring (1); the inner diameter of the sleeve (31) is greater than the outer diameter of the inner ring (1) plus the wall thickness of the blood vessel on the outer side of the inner ring (1) and is used to assist the blood vessel to evert and wrap around the outer wall of the inner ring (1).

5. The cassette-type vascular anastomosis device according to claim 1, characterized in that, The insertion slot (23) is provided with a snap-fit ​​block (231), and the insertion connector (22) is provided with a snap-fit ​​slot (222) for snap-fitting the snap-fit ​​block (231).

6. The cassette-type vascular anastomosis device according to claim 5, characterized in that, The snap-fit ​​block (231) has a first mounting surface (232) on the side near the other outer ring (2), and the plug (22) has a second mounting surface (221) on the side near the other outer ring (2) that mates with the first mounting surface (232).

7. The cassette-type vascular anastomosis device according to claim 1, characterized in that, The inner ring (1) is also provided with a first snap-fit ​​strip (13) and a first mounting groove (14) for snapping the first snap-fit ​​strip (13); the first snap-fit ​​strip (13) is provided with a first snap-fit ​​spring piece (131), and the side wall of the first mounting groove (14) is provided with a plurality of first snap-fit ​​openings (141) for the first snap-fit ​​spring piece (131) to snap into; the outer ring (2) is also provided with a second snap-fit ​​strip (24) and a second mounting groove (25) for snapping the second snap-fit ​​strip (24); the second snap-fit ​​strip (24) is provided with a second snap-fit ​​spring piece (241), and the side wall of the second mounting groove (25) is provided with a plurality of second snap-fit ​​openings (26) for the second snap-fit ​​spring piece (241) to snap into.

8. The cassette-type vascular anastomosis device according to claim 1, characterized in that, Therefore, an adhesive layer (12) for vascular adhesion is provided on the outer wall of the inner ring (1).

9. The cassette-type vascular anastomosis device according to claim 1, characterized in that, Both the inner ring (1) and the outer ring (2) are made of polylactic acid.

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