Vascular anastomosis device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a blood vessel anastomosis device which comprises a pair of triangular anastomosis devices, through holes are formed in the anastomosis devices, and anastomosis rings are arranged in the through holes. Coordination needles and coordination holes which are matched with each other are arranged on the opposite faces of the pair of anastomators in a staggered mode, and anastomosis forceps are arranged in a mode of being matched with the anastomators. An embedding device is arranged on the anastomosis forceps, a triangular embedding groove matched with the anastomat is formed in the embedding device, the embedding device is further arranged to be of a telescopic structure, and an adjusting mechanism capable of adjusting the distance between two forceps rods of the anastomosis forceps is arranged at the rotating connecting position of the anastomosis forceps in a matched mode. The end-to-end anastomosis and end-side anastomosis of the blood vessel can be simultaneously adapted, a 45-degree included angle between a donor blood vessel and a receptor blood vessel can be formed in the end-side anastomosis, the design of hemodynamics is met, the effect of blood vessel anastomosis is effectively improved, and the risk of various postoperative complications is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a blood vessel anastomosis device. Background Art

[0002] Although existing mechanical vascular anastomosis devices have certain advantages over other anastomosis methods, they still have many limitations. In arteries with thick walls or prone to pathological changes such as atherosclerosis, the anastomosis ring may cause the arterial lumen to become smaller; and the non-contractible anastomosis ring may interrupt the pulsation of the arterial blood vessels, hinder arterial blood flow, cause vortexes, and then lead to thrombosis.

[0003] In addition, currently used vascular staplers can only perform end-to-end vascular anastomosis, and are not applicable to end-to-side vascular anastomosis. In addition, existing vascular staplers usually pull the broken ends of the blood vessels to hang them on the anastomotic ring, which can easily cause the blood vessel wall to become thin or even rupture. Utility Model Content

[0004] The utility model aims to provide a vascular anastomosis device which can be used in both end-to-end anastomosis and end-to-side vascular anastomosis operations.

[0005] Based on the above purpose, the utility model adopts the following technical solutions:

[0006] A vascular anastomosis device comprises a pair of equilateral triangular sheet-shaped anastomosis devices, the anastomosis devices are provided with through holes, and anastomosis rings are provided in the through holes; the anastomosis device comprises a donor-side anastomosis device and a recipient-side anastomosis device that cooperate with each other, and a matching pin is vertically arranged on the end surface opposite to the donor-side anastomosis device and the recipient-side anastomosis device, and matching holes that cooperate with the matching pin are also provided on the donor-side anastomosis device and the recipient-side anastomosis device, and the matching holes are blind hole structures.

[0007] Preferably, a conical groove is provided at the end of the coordination needle, a conical puncture head is provided at the end of the coordination needle, and a conical limiting structure cooperating with the conical groove and the puncture head of the coordination needle is provided in the coordination hole; the coordination hole of the donor side stapler is matched with the coordination needle of the recipient side stapler, and the coordination needle of the donor side stapler is matched with the coordination hole of the recipient side stapler.

[0008] Preferably, a pair of coordination pins and coordination holes are provided at the three corner ends of the donor-side stapler and the recipient-side stapler, and four pairs of coordination pins and coordination holes are evenly and alternately distributed on the anastomotic ring.

[0009] Preferably, the through hole of the donor-side stapler is inclined at 45° to the central symmetry axis of the donor-side stapler.

[0010] Preferably, the sides of the donor-side stapler and the recipient-side stapler are both surrounded by fitting grooves, and the thickness of the recipient-side stapler is smaller than that of the donor-side stapler.

[0011] Preferably, the vascular anastomosis device also includes an anastomosis forceps arranged in cooperation with the anastomosis device, the anastomosis forceps include a pair of rotatably connected forceps rods, one end of the pair of forceps rods is provided with a pair of handles, and the other end is provided with a pair of interlocking devices cooperating with the anastomosis device.

[0012] Preferably, an equilateral triangular engaging groove cooperating with the stapler is provided in the engaging device, and an engaging protrusion cooperating with the engaging groove is provided on the inner side of the installation groove.

[0013] Preferably, the engaging device comprises a fixed end and a sliding end, the fixed end is provided with a telescopic groove, the sliding end is provided with a telescopic strip matching the telescopic groove, and the telescopic strip is connected to the inner side of the telescopic groove through a contraction spring.

[0014] Preferably, a pair of matching connecting tubes are provided at the connection of the two handles of the anastomotic forceps, matching threaded holes are provided on the inner sides of the pair of connecting tubes, and adjusting studs are provided through the threaded holes in cooperation with the threaded holes; and adjusting knobs are provided at both ends of the adjusting studs.

[0015] Preferably, the equilateral triangular sheet structure portion of the anastomosis device is made of a magnetic degradable material, the inner wall of the anastomosis ring is made of an elastic material, and the coordination needle is made of a degradable material; the triangular portion of the anastomosis device is made of a magnetic degradable material, which can fall off by itself in the patient's body, thereby reducing the weight of the vascular anastomosis device and reducing the space occupancy rate; the anastomosis ring can be made of a polylactic acid anastomosis ring, a polyglycolide anastomosis ring, a polyamide anastomosis ring or a polycaprolactone anastomosis ring, etc., and the inner wall portion of the anastomosis ring close to the blood vessel end is made of an elastic material; the coordination needle is made of a degradable zinc-based material.

[0016] The beneficial effects of the utility model are:

[0017] The utility model is provided with a triangular anastomosis device, which can be applied to the vascular anastomosis of a Y-shaped incision on a blood vessel. The three-flap blood vessel formed by the Y-shaped incision of the donor-side blood vessel and the recipient-side blood vessel is fixed to the matching pins on the donor-side anastomosis device and the recipient-side anastomosis device respectively, and then the donor-side anastomosis device is aligned and buckled with the recipient-side anastomosis device, so that the end-to-side anastomosis of the blood vessel can be completed; and for the end-to-end anastomosis of the blood vessel, a pair of identical recipient-side anastomosis devices can be selected to perform the anastomosis operation, that is, the utility model can be applied to both the end-to-end anastomosis and the end-to-side anastomosis of the blood vessel.

[0018] The utility model can fix the three flaps formed by the Y-shaped incision of the side wall of the blood vessel or the stump of the blood vessel through the coordination pins on the three corners of the anastomosis device, so as to avoid the damage of the blood vessel endothelium due to the involvement of the blood vessel; and an additional group of coordination pins and coordination holes are arranged on the anastomosis ring to reinforce the blood vessel at multiple points, reduce the damage to the blood vessel caused by blood seepage and repeated stimulation, improve the quality of blood vessel anastomosis, reduce postoperative complications, and prevent adverse effects such as blood seepage, circulation disorder or blood vessel wall damage.

[0019] The utility model can be provided with anastomosis devices of different specifications to be suitable for blood vessels of different sizes. In coordination with the anastomosis forceps, the interlocking device adopts a structure that can be retracted laterally, so that it can be adapted to anastomosis devices of different sizes. A triangular interlocking groove is provided on the inner side of the interlocking device for interlocking and installing the anastomosis device, and an interlocking groove and an interlocking protrusion structure that match are provided on the edge of the anastomosis device and the inner side of the interlocking groove, so as to ensure that the anastomosis device is fixed and stable when installed in the interlocking device. In coordination with the anastomosis forceps, a threaded hole and a screw rod matching structure are provided at the rotation connection of the two clamp rods, and a pair of adjustment knobs are used to control the gap between the two clamp rods, thereby maintaining the alignment of the two interlocking devices and even the two anastomosis devices. In actual use, the two anastomosis devices can be accurately matched, and the triangular interlocking structure does not need to be aligned and adjusted, which greatly saves the operation time. The utility model is not only suitable for anastomosis between blood vessels of the same type and similar diameters, but can be used for anastomosis of arteries and veins by selecting anastomosis rings of different diameters to form arteriovenous fistulas or anastomosis between blood vessels of different diameters.

[0020] The utility model adopts elastic material to make the inner part of the anastomotic ring. When anastomosing arteries and other blood vessels with large pulsation, the inner part can change with the size of the blood vessel lumen, reducing the formation of vortices and avoiding the formation of thrombus. By setting a nail-recessed mosaic structure, the diamond-shaped coordination needle tips and coordination holes are alternately distributed and matched, which can improve the accuracy of the anastomosis, ensure the blood vessel caliber at the anastomosis, correct the everted blood vessel wall stump, so as to ensure that the inner membrane at the anastomosis is flat and smooth and fully covered. For cases with differences in closing thickness and caliber during anastomosis, the reliability of the anastomosis can also be ensured through correction, thereby reducing venous damage.

[0021] The donor-side anastomosis device used on the donor blood vessel side of the utility model has an internal through hole inclined at 45 degrees, so that the donor-side blood vessel and the recipient-side blood vessel are also connected at a 45-degree inclination, which conforms to hemodynamics, can prevent the formation of vortices at the bifurcation of the blood vessels, reduce wall shear stress, and reduce complications such as vascular stenosis and aneurysmal dilatation caused by intimal hyperplasia. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the recipient-side stapler in Example 1 of the utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the donor-side stapler in Example 1 of the utility model;

[0025] Figure 4 It is a side cross-sectional view of the recipient-side stapler and the donor-side stapler after they are connected in cooperation in Example 1 of the utility model;

[0026] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of the present utility model;

[0027] Figure 6 It is a partial enlarged view of the embedding device of Example 2 of the utility model;

[0028] Figure 7 It is a partial enlarged view of the fitting device after the stapler is installed in Example 2 of the utility model;

[0029] Figure 8 It is a partial enlarged view of the embedding device in Example 2 of the utility model;

[0030] Fig. 9 This is a schematic diagram of the vascular incision structure of the end-to-side vascular anastomosis in Example 3 of the utility model.

[0031] In the figure: donor-side stapler 1; recipient-side stapler 2; anastomotic ring 3; through hole 31; fitting groove 4; coordination pin 5; coordination hole 6; anastomotic clamp rod 7; fitting device 71; fitting device sliding end 72; rotating connection 73; handle 74; pull ring 75; fitting protrusion 76; telescopic strip 77; stud 8; adjustment knob 9. DETAILED DESCRIPTION

[0032] Example 1

[0033] The following is a further explanation of the present invention in conjunction with specific embodiments. Figure 1 As shown, this embodiment is a vascular anastomosis device for use in vascular anastomosis, including a pair of triangular sheet-shaped staplers, which are divided into a donor-side stapler 1 and a recipient-side stapler 2; the donor-side stapler 1 and the recipient-side stapler 2 have the same shape, wherein the thickness of the recipient-side stapler 2 is slightly thinner than that of the donor-side stapler 1; a through hole 31 structure is provided on both staplers, and an anastomosis ring 3 is provided in the through hole 31; the through hole 31 is used to allow the blood vessel to pass through the stapler.

[0034] The structure of the donor-side stapler 1 and the recipient-side stapler 2 is as follows: Figure 2 and Figure 3As shown, on the opposite sides of the two staplers, there are staggered arrangement of the coordination needles 5 and the coordination holes 6; wherein a pair of coordination needles 5 and the coordination holes 6 are arranged at the three corners of the stapler, and four pairs of coordination needles 5 and the coordination holes 6 are arranged on the anastomotic ring 3; Figure 2 As shown, on the receiving side stapler 2, the coordinating pins 5 at the corners are arranged on the outside, and the coordinating holes 6 are arranged on the inside; Figure 3 As shown, on the donor-side stapler 1, the positions of the coordination pins 5 and the coordination holes 6 are opposite to those on the recipient-side stapler 2, that is, the coordination pins 5 are on the inside and the coordination holes 6 are on the outside; similarly, the coordination pins 5 and the coordination holes 6 on the anastomotic ring 3 are staggered and evenly arranged, and the arrangement positions on the donor-side stapler 1 are opposite to those on the recipient-side stapler 2, so that the coordination pins 5 on the donor-side stapler 1 are aligned with the coordination holes 6 on the recipient-side stapler 2, and the coordination holes 6 on the donor-side stapler 1 are aligned with the coordination pins 5 on the recipient-side stapler 2.

[0035] When two staplers are connected relative to each other, Figure 4 As shown, at this time, the diamond-shaped structure at the tip of each coordination needle 5 is just embedded in the conical limiting structure in the corresponding coordination hole 6, so that the two anastomosis devices are buckled and fixed, and the two anastomosis rings 3 are aligned; wherein the through hole 31 in the donor-side anastomosis device 1 is arranged at an angle of 45° with the central symmetry axis of the donor-side anastomosis device 1 inside the donor-side anastomosis device 1, so that after the blood vessel anastomosis, the donor blood vessel and the recipient blood vessel are connected at an angle of 45°, which is in line with hemodynamics to avoid the occurrence of vortices, resulting in increased wall shear stress, the occurrence of intimal hyperplasia, and complications such as vascular stenosis and aneurysmal dilatation.

[0036] Example 2

[0037] The difference between this embodiment and embodiment 1 is that Figure 5 As shown, this embodiment is an anastomotic forceps used to cooperate with the anastomosis device in the above-mentioned embodiment 1 to perform vascular anastomosis operations, including a pair of anastomotic forceps rods 7 connected by rotation; one end of the anastomotic rod 7 is set as a handle 74, and the other end is set as an interlocking device 71 that cooperates with the anastomosis device.

[0038] The fitting device 71 is a telescopically expandable structure, which includes a fixed end fixedly connected to the anastomotic forceps rod 7, and a fitting device sliding end 72 telescopically linked to the fixed end; Figure 8As shown, a telescopic groove is provided on one side surface of the fixed end of the engaging device 71, and a telescopic strip 77 cooperating therewith is provided on the sliding end 72 of the engaging device. The telescopic strip 77 can be inserted into the telescopic groove and slide in the telescopic groove to achieve the expansion of the engaging device 71. A contraction spring is provided in the telescopic groove, one end of the contraction spring is fixedly provided in the telescopic groove, and the other end is fixedly connected to the telescopic strip 77, continuously providing a pulling force in the direction of the telescopic groove for the telescopic strip 77, so as to keep the engaging device 71 always maintaining a tendency to contract inwardly; a pull ring 75 is provided on the sliding end 72 of the engaging device, so as to facilitate pulling the sliding end 72 of the engaging device outward, as shown in FIG. Figure 6 shown.

[0039] The fitting device 71 is provided with a triangular fitting groove inside, and the fitting grooves are matched with the sizes of the two staplers respectively; a circle of fitting protrusions 76 are provided on the inner side of the fitting groove, and a fitting groove 4 matching with the fitting protrusion 76 is provided on the side edge of the stapler. When the stapler is placed in the fitting groove, the fitting groove 4 cooperates with the fitting protrusion 76, and the stapler can be fixed on the fitting device 71. Figure 7 shown.

[0040] An adjusting mechanism for adjusting the distance between the two anastomotic clamp rods 7 is provided at the rotating connection 73, including a screw rod 8 provided through the rotating connection 73; a pair of adjusting knobs 9 are provided on the outer sides of the two anastomotic clamp rods 7 at both ends of the screw rod 8; the adjusting knob 9 can be engaged with the screw rod 8, and the distance between the two anastomotic clamp rods 7 can be controlled by rotating the distance between the two adjusting knobs 9; when a larger-sized stapler is selected, it is necessary to pull the sliding end 72 of the engaging device outward to increase the size of the engaging groove, but this will cause the central axes of the two engaging grooves to no longer be aligned, so that the two staplers cannot be aligned and engaged; at this time, it is necessary to adjust the distance between the two anastomotic clamp rods 7 by rotating the adjusting knob 9, so that the central axes of the two engaging grooves are realigned in the same plane, ensuring that the staplers can be accurately aligned and engaged; in this embodiment, a compression spring (not shown in the figure) can also be provided between the two anastomotic clamp rods 7 in the middle section of the stud 8 to keep the two anastomotic clamp rods 7 pushed outward to the maximum distance.

[0041] In this embodiment, the three sides of the anastomosis device are in the range of 4-8mm, the outer diameter of the anastomosis ring 3 is 2.5-6mm, the inner diameter is 1.5-5mm, and the main body thickness of the anastomosis ring 3 is 0.8-1.5mm, so that this embodiment can be used for vascular anastomosis surgery with an outer diameter within the range of 1.5-5mm; the length of the coordination needle 5 is 1.5-3mm and the diameter is 0.2-0.5mm; in this embodiment, the regular triangular sheet structure of the anastomosis device is made of magnetic degradable material, and the coordination needle 5 is made of degradable zinc-based material, which will naturally degrade and fall off after being implanted in the human body for a period of time, thereby reducing the weight of the vascular anastomosis device and reducing the space occupancy rate; wherein the anastomosis ring 3 is a polylactic acid anastomosis ring, a polyglycolide anastomosis ring, a polyamide anastomosis ring or a polycaprolactone anastomosis ring, etc., and the inner side of the anastomosis ring 3 close to the blood vessel end is made of elastic material.

[0042] Example 3

[0043] The difference between this embodiment and the above embodiment is that this embodiment is a specific method for using the above embodiment to perform vascular end-to-side anastomosis; Fig. 9 As shown, when performing the end-to-side anastomosis of a blood vessel, first make a "Y"-shaped opening on the stump of the donor blood vessel, that is, cut the stump into three petals; then, the stump of the blood vessel is passed through the internal through hole 31 of the donor side anastomosis device 1 from the end where the coordination needle 5 is not set, and then the tips of the three petals of the stump of the blood vessel are hung on the coordination needles 5 at the three corners of the donor side anastomosis device 1, and then the blood vessel is punctured with the coordination needles 5 on the anastomosis ring 3; then, a "Y"-shaped opening is cut on the side wall of the recipient blood vessel, and then the three petals formed after the cutting are passed through the anastomosis ring 3, and similarly, the three petals of the blood vessel are first hung on the coordination needles 5 at the three corners, and then the blood vessel is punctured with the coordination needles 5 on the anastomosis ring 3.

[0044] After completing the setting of the blood vessel and the anastomosis device, the anastomosis device is installed in the interlocking device 71 of the anastomosis forceps; according to the size of the anastomosis device used, the adjustment knob 9 is turned to adjust the spacing between the two anastomosis forceps rods 7 to a suitable distance, and then the sliding end 72 of the interlocking device is pulled apart through the pull ring 75, and the anastomosis devices are respectively set in the interlocking grooves in the interlocking device 71, so that the interlocking grooves 4 are matched with the interlocking protrusions 76; loosen the pull ring 75, and the anastomosis device can be fixed in the interlocking groove under the action of the spring.

[0045] After that, it is only necessary to operate the handle 74 to buckle the two interlocking devices 71 of the anastomotic forceps. At this time, the coordination needle 5 on the donor-side fixer 1 is inserted into the corresponding coordination hole 2 on the recipient-side stapler 2, and the coordination needle 5 on the recipient-side stapler 2 is inserted into the coordination hole on the donor-side stapler 1, so as to realize the coordination connection of the two staplers; at this time, the broken end of the donor blood vessel and the side wall of the recipient blood vessel are anastomosed and connected, and the vascular end-to-side anastomosis is completed; thereafter, the pull ring 75 is pulled to remove the stapler from the interlocking device 71, and the anastomotic forceps and other surgical instruments can be withdrawn, and the wound is sutured to complete the operation.

[0046] Example 4

[0047] The difference between this embodiment and the above embodiment is that this embodiment is a specific method for using the stapler and anastomotic forceps in the above embodiment to perform end-to-end anastomosis of blood vessels.

[0048] When performing end-to-end anastomosis of blood vessels, two receiving-side staplers 2 are required, whose internal through holes 31 are not inclined, and the thickness of the two staplers is equal, and the matching needles 5 and the matching holes 6 are also staggered and matched; as in Example 3, a "Y"-shaped incision is made on the two blood vessel ends to cut the ends into three petals; then the three petal tips of the two blood vessel ends are respectively hung on the matching needles 5 at the three corners of the receiving-side stapler 2, and then the blood vessels are punctured with the matching needles 5 on the anastomotic ring 3; as described in Example 3, the staplers are installed in the interlocking device 71 of the anastomotic forceps, and the two staplers are buckled together by the anastomotic forceps to achieve end-to-end anastomosis of the two blood vessel ends; thereafter, as described in Example 3, the anastomotic forceps and other surgical instruments are taken out to complete the operation.

[0049] The above description is only a further explanation of the present invention in combination with specific embodiments. All descriptions do not limit the protection scope of the present invention. Any changes or replacement solutions that can be easily thought of by technicians in this field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vascular anastomosis device, comprising a pair of regular triangular-shaped staplers, characterized in that: The stapler is provided with a through hole, in which an anastomotic ring is provided; the stapler comprises a donor-side stapler and a recipient-side stapler which cooperate with each other, and a coordination pin is vertically provided on the end surface opposite to the donor-side stapler and the recipient-side stapler, and a coordination hole which cooperates with the coordination pin is also provided on the donor-side stapler and the recipient-side stapler, and the coordination hole is a blind hole structure.

2. The vascular anastomosis device according to claim 1, characterized in that: A conical groove is provided at the end of the coordination needle, and a conical puncture head is provided at the end of the coordination needle. A conical limiting structure cooperating with the conical groove and the puncture head of the coordination needle is provided in the coordination hole; the coordination hole of the donor side stapler is coordinated with the coordination needle of the recipient side stapler, and the coordination needle of the donor side stapler is coordinated with the coordination hole of the recipient side stapler.

3. The vascular anastomosis device according to claim 2, characterized in that: A pair of coordination pins and coordination holes are arranged at the three corner ends of the donor-side stapler and the recipient-side stapler, and four pairs of coordination pins and coordination holes are evenly and alternately distributed on the anastomotic ring.

4. The vascular anastomosis device according to claim 1, characterized in that: The through hole of the supply-side stapler is inclined at 45 degrees to the central symmetry axis of the supply-side stapler.

5. The vascular anastomosis device according to any one of claims 1 to 4, characterized in that: The sides of the donor-side stapler and the recipient-side stapler are both surrounded by fitting grooves, and the thickness of the recipient-side stapler is smaller than that of the donor-side stapler.

6. The vascular anastomosis device according to claim 5, characterized in that: The vascular anastomosis device also includes an anastomosis forceps arranged in cooperation with the anastomosis device, and the anastomosis forceps include a pair of rotatably connected forceps rods, one end of the pair of forceps rods is provided with a pair of handles, and the other end is provided with a pair of interlocking devices that cooperate with the anastomosis device.

7. The vascular anastomosis device according to claim 6, characterized in that: The embedding device is provided with an equilateral triangular embedding groove matched with the stapler, and the inner side of the embedding groove is provided with an embedding protrusion matched with the embedding groove.

8. The vascular anastomosis device according to claim 7, characterized in that: The engaging device comprises a fixed end and a sliding end, wherein the fixed end is provided with a telescopic groove, and the sliding end is provided with a telescopic strip matched with the telescopic groove, and the telescopic strip is connected to the inner side of the telescopic groove through a contraction spring.

9. The vascular anastomosis device according to claim 8, characterized in that: A pair of matching connecting tubes are provided at the rotating connection of the two handles of the anastomotic forceps, and matching threaded holes are provided on the inner sides of the pair of connecting tubes. Adjustment studs are provided through the threaded holes in cooperation with the threaded holes; and adjustment knobs are provided at both ends of the adjustment studs.

10. The vascular anastomosis device according to claim 1, characterized in that: The regular triangle sheet-shaped structure part of the stapler is made of a magnetic degradable material, the inner side wall of the stapler ring is made of an elastic material, and the coordination pin is made of a degradable material.

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