Rotational convex-concave coupling vascular anastomosis device

Abstract

A rotational convex-concave coupling vascular anastomosis device according to the present invention comprises: a first vascular coupler which is fixedly fastened to an end of a first blood vessel to be connected; and a second vascular coupler which is fixedly fastened to an end of a second blood vessel to be connected to the first blood vessel, wherein the first vascular coupler and the second vascular coupler are formed as a pair corresponding to each other and are engaged and coupled to each other by rotation, such that the pair of vascular couplers are firmly fixed and coupled together through rotation, and therefore can also be used for connecting thick blood vessels.

Description

Rotating stent-type anastomosis device

[0001] The present invention relates to a vascular anastomosis device, and more particularly, to a rotary ribbed fastening vascular anastomosis device.

[0002] The content described in this section merely provides background information for one embodiment of the present invention and does not constitute prior art.

[0003]

[0004] A vascular anastomosis device (or vascular grafter) is a device that connects severed blood vessels on both sides easily, accurately, and quickly. Currently, the only vascular grafter used in surgery worldwide is the non-absorbable vascular grafter manufactured by Synovis, Inc. in the United States. It is used for microvascular anastomoses with a diameter of 1 to 3 mm. Vascular anastomosis using a vascular grafter takes less than 5 minutes, and its effectiveness has been proven in numerous studies. In Korea, it is widely used for venous anastomoses in microsurgical procedures such as free flap surgery. However, a vascular grafter capable of connecting the large vessels required for organ transplantation is still under development.

[0005]

[0006] Advances in 21st-century medicine are making our dreams a reality. In the near future, suture-based vascular anastomosis will be replaced by automated vascular connections using vascular grafting machines. In regenerative medicine, a key future field of medicine, human organ transplantation will gradually expand from allogeneic to xenogeneic and even 3D organ printing. The era of replacing damaged organs rather than treating them will soon arrive. Vascular grafting machines will be used for organ replacement, much like the nuts and bolts of a car, facilitating easy replacement of parts.

[0007]

[0008] Conventional vascular anastomosis techniques use sutures. The needle passes through the entire wall of each opposing vessel, then the suture is tied so that the ends of the vessels meet. Connecting a single vessel requires at least five to nine stitches. During this process, if the needle damages the vessel wall or the end of the vessel becomes engulfed, blood flowing through the vessel wall can collide with the damaged surface, ultimately forming a thrombus and blocking the vessel, potentially leading to fatal complications. Furthermore, each stitch must be completed individually, making the procedure time-consuming. Therefore, vascular anastomosis surgery requires extensive training and experience, and a high level of concentration is crucial, as the success of the procedure hinges on the vascular connection.

[0009]

[0010] The vascular anastomosis device will minimize surgical errors and achieve optimal surgical outcomes by safely, reliably, and quickly performing the crucial process of vascular connection in transplant surgery. This is because shortening the anastomosis time allows for faster blood supply to tissues or organs whose blood supply has been cut off. This, in turn, minimizes warm ischemic time (WIT) and ischemia-reperfusion injury (IRI), dramatically improving the outcome of tissue or organ transplantation. Warm ischemic time refers to the time an excised organ is exposed to room temperature, while IRI refers to damage that occurs when blood is restored to a tissue or organ after an ischemic period.

[0011]

[0012] Figure 1 is a drawing illustrating a conventional vascular anastomosis device having a hook structure. As illustrated in Figure 1, the vascular anastomosis device must have the following two devices: first, a hook for fixing the vessel, and second, a coupling for connecting the two vascular anastomosis devices. In other words, the vascular anastomosis device is tubular in shape and includes a hook and a coupling device. First, the hook for fixing the vessel is shaped like a pointed triangle, with the lower side being widest and the upper side narrowing in the shape of an isosceles triangle. The direction of the vertex is either the same as the longitudinal direction of the vessel or 180 degrees opposite. The problem with this device is that the vessel may be detached from the fixation device when additional manipulation is performed to connect the vessels on both sides after fixing the vessel. Next, the connecting device is attached to a tubular ring and is connected to a connecting device attached to the opposite tubular ring, and faces each other, so that they move in a straight line in the same direction as the length of the blood vessel and are connected (Patent Registration No. 10-1636990).

[0013]

[0014] Fig. 2 is a drawing illustrating a conventional vascular anastomosis device having a double ring structure. As illustrated in Fig. 2, the vascular anastomosis device is composed of an external ring and an internal ring, and a method in which a blood vessel is fixed to a ring device of the internal ring and the internal ring is inserted into the external ring to be joined (Patent No. 10-0876516). In other words, the vascular anastomosis device is composed of three parts: two internal rings and one external ring connected to blood vessels on both sides. The connection method is a method in which screw threads and bones are joined, or a method in which a shoulder on the opposite side is caught on a protruding jaw or projection to prevent it from retracting.

[0015]

[0016] However, according to the connection method of the vascular graft proposed so far, there was a problem that the fixation force was not strong enough, so there was a limit to connecting thick blood vessels, and the structure became complicated because the rings were not directly connected without placing an outer ring in the middle.

[0017]

[0018] The background technology described above is technical information that the inventor possessed for the purpose of deriving the present invention or acquired in the process of deriving the present invention, and cannot necessarily be said to be publicly known technology disclosed to the general public prior to the application for the present invention.

[0019] The present invention is proposed to solve the above-mentioned problems of the existing proposed methods, and the purpose of the present invention is to provide a rotary concave fastening vascular anastomosis device, which includes a first vascular anastomosis device that is fastened and fixed to an end of a first blood vessel to be connected, and a second vascular anastomosis device that is fastened and fixed to an end of a second blood vessel connected to the first blood vessel, wherein the first vascular anastomosis device and the second vascular anastomosis device are configured as a pair that are fastened and fixed by rotation in correspondence with each other, so that the pair of vascular anastomosis devices are firmly fixed and coupled by rotation, and can be used for connecting thick blood vessels.

[0020]

[0021] In addition, another object of the present invention is to provide a rotary trough-fastening vascular anastomosis device in which a sharp end of a ring device for fixing a blood vessel is bent inwardly to sharply penetrate the wall of the blood vessel, and a jaw is formed in the middle of the ring device to hold the blood vessel so that it cannot easily come out once it is fixed.

[0022]

[0023] In addition, another object of the present invention is to provide a rotary ribbed fastening vascular anastomosis device that can prevent the fastening of the vascular anastomosis device from becoming loose or separated by further including a safety device in corresponding parts of at least one of the connecting units.

[0024]

[0025] However, the technical problem to be achieved by the present invention is not limited to the technical problem described above, and other technical problems may exist, and even if not explicitly mentioned, the purpose or effect that can be understood from the solution or embodiment of the problem is also included.

[0026] In order to achieve the above-mentioned purpose, the rotary concave-convex vascular anastomosis device according to the features of the present invention is:

[0027] As a vascular anastomosis device for connecting the ends of blood vessels,

[0028] A first vascular graft device that is fixedly fastened to the end of the first blood vessel to be connected; and

[0029] Including a second blood vessel ligature fixedly attached to the end of a second blood vessel connected to the first blood vessel,

[0030] The first vascular anastomosis device and the second vascular anastomosis device are,

[0031] Its structural characteristic is that it consists of a pair that are connected by rotation in response to each other.

[0032]

[0033] Preferably, each of the first vascular grafting machine and the second vascular grafting machine,

[0034] Tubular body;

[0035] A configuration for fixing a blood vessel in one section of the body, a ring device having a plurality of positions in one section of the body and having a sharp end bent inwardly toward the body; and

[0036] It may include a connecting unit that is spaced apart from the body, extends outwardly from the body between the ring devices of one end surface of the body, and has a protrusion and a groove formed to engage with each other so that the bodies of the first vascular grafting device and the second vascular grafting device are fastened and connected by rotation.

[0037]

[0038] More preferably, the body,

[0039] A concave portion having a narrow width may be formed at one end of the body, and the ring device may be formed in a cross-section of the concave portion.

[0040]

[0041] More preferably, the first vascular grafting machine and the second vascular grafting machine,

[0042] In the above body, the opposite end surface of one end surface to which the ring device and the connecting unit are connected can be joined to each other.

[0043]

[0044] More preferably, the ring device,

[0045] There may be a chin in the middle to prevent the fixed blood vessel from becoming dislodged.

[0046]

[0047] More preferably, the ring device,

[0048] Six of them can be arranged at 60-degree intervals on one cross section of the above body.

[0049]

[0050] Even more preferably, the connecting unit,

[0051] Six of them are connected at 60-degree intervals to one section of the above body, and can be placed between the ring devices.

[0052]

[0053] More preferably,

[0054] The connecting unit of the first vascular grafting machine has a concave groove formed in the rotational direction of the first vascular grafting machine,

[0055] The connecting unit of the second vascular grafting device is formed with a protrusion that is convex in the rotational direction of the second vascular grafting device and corresponds to the groove.

[0056] The first vascular grafting device and the second vascular grafting device can rotate in opposite directions so that the groove and the projection can be fastened and joined.

[0057]

[0058] Even more preferably,

[0059] The end of the blood vessel is turned over so that the inner wall of the blood vessel faces outward through the body. The blood vessel is inserted into the space between the body and the connecting unit, and the end of the blood vessel is fixed to the ring device. The first blood vessel stapler to which the end of the first blood vessel is fixed and the second blood vessel stapler to which the end of the second blood vessel is fixed rotate in opposite directions so that the connecting unit can be fastened and connected.

[0060]

[0061] More preferably, the connecting unit,

[0062] It may be rectangular in shape with a length greater than the height of the body.

[0063]

[0064] More preferably, each of the first vascular grafting machine and the second vascular grafting machine,

[0065] The above connecting units may further include a safety device formed on corresponding protrusions and grooves to prevent the connection from becoming loose or separated.

[0066]

[0067] Even more preferably, the safety device,

[0068] The projection and groove can be formed so that they are in contact with each other when the first and second vascular grafting devices are fastened and connected.

[0069]

[0070] Even more preferably, the safety device comprises:

[0071] It can be configured to be spherical and act as a suture catcher, so that the spherical safety devices that are in contact with each other can be tightened using a suture.

[0072]

[0073] Even more preferably, the safety device comprises:

[0074] It is configured in the shape of a hexahedron with screw grooves formed inside, and can be configured to fasten and fix the screw grooves that are in contact with each other with screws.

[0075]

[0076] More preferably, each of the first vascular grafting machine and the second vascular grafting machine,

[0077] It may be composed of absorbent material.

[0078]

[0079] Even more preferably, the absorbent material is:

[0080] It may be any one absorbable polymer selected from the group consisting of poly-lactic acid (PLA), poly-glycolic acid (PGA), polycaprolactone (PCL) and poly-lacticoglycolic acid (PLGA).

[0081] According to the rotary concave-convex fastening vascular anastomosis device proposed in the present invention, the device comprises a first vascular anastomosis device fastened and fixed to an end of a first blood vessel to be connected, and a second vascular anastomosis device fastened and fixed to an end of a second blood vessel connected to the first blood vessel, wherein the first vascular anastomosis device and the second vascular anastomosis device are configured as a pair that are fastened and connected by rotation in correspondence with each other, so that the pair of vascular anastomosis devices are firmly fixed and connected by rotation, and can be used for connecting thick blood vessels.

[0082]

[0083] In addition, according to the rotary trough-type vascular anastomosis device proposed in the present invention, the sharp end of the ring device for fixing the blood vessel is bent inwardly into the body so as to sharply penetrate the wall of the blood vessel, and a jaw is formed in the middle of the ring device so that once the blood vessel is fixed, it can be held so that it does not easily come out.

[0084]

[0085] In addition, according to the rotary concave-convex fastening vascular anastomosis device proposed in the present invention, by further including a safety device in corresponding parts of at least one of the connecting units, the fastening of the vascular anastomosis device can be prevented from becoming loose or separated.

[0086]

[0087] In addition, the various advantageous advantages and effects of the present invention are not limited to the above-described contents, and will be more easily understood in the process of explaining specific embodiments of the present invention.

[0088] Figure 1 is a drawing showing the appearance of a conventional vascular anastomosis device having a hook structure.

[0089] Figure 2 is a drawing showing the appearance of a conventional vascular anastomosis device having a double ring structure.

[0090] FIG. 3 is a drawing showing the overall appearance of a rotary concave-convex vascular anastomosis device according to one embodiment of the present invention.

[0091] FIG. 4 is a drawing showing a combined rotary concave-convex vascular anastomosis device according to one embodiment of the present invention.

[0092] FIG. 5 is a drawing showing a detailed appearance of a first vascular grafting device or a second vascular grafting device in a rotary vascular grafting device according to one embodiment of the present invention.

[0093] FIG. 6 is a drawing showing a detailed appearance of a ring device in a rotary concave-convex vascular anastomosis device according to one embodiment of the present invention.

[0094] FIG. 7 is a drawing showing the state of the first vascular graft and the second vascular graft before they are joined in a rotary vascular grafting device according to one embodiment of the present invention.

[0095] FIG. 8 is a drawing showing the appearance of a first vascular grafting device and a second vascular grafting device after being connected in a rotary vascular grafting device according to one embodiment of the present invention.

[0096] FIG. 9 is a drawing showing the appearance of a spherical safety device in a rotary concave-convex vascular anastomosis device according to one embodiment of the present invention.

[0097] FIG. 10 is a drawing showing the appearance of a hexahedral safety device in a rotary concave-convex vascular anastomosis device according to one embodiment of the present invention.

[0098] <Explanation of symbols>

[0099] 100: 1st vascular anastomosis device

[0100] 100': Second vascular anastomosis device

[0101] 110: Body

[0102] 111: Cross-section

[0103] 112: Concave

[0104] 120: Ring device

[0105] 130, 130': Connection unit

[0106] 131: Protrusion

[0107] 132: Home

[0108] 140, 140': Safety device

[0109] Below, with reference to the attached drawings, embodiments of the present invention are described in detail so that those skilled in the art can easily implement them. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, irrelevant parts have been omitted for clarity of description, and similar reference numerals have been used throughout the specification to indicate similar elements.

[0110]

[0111] Throughout the specification, when a part is said to be "connected" to another part, this includes not only cases where it is "directly connected" but also cases where it is "indirectly connected" with another element in between. In addition, terms such as "comprise," "include," or "have" used below should be interpreted to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, and should be understood to not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. In addition, the singular expression used in the present invention includes the plural expression unless the context clearly indicates otherwise.

[0112]

[0113] In addition, each configuration, process, procedure or method included in each embodiment of the present invention may be shared within a scope that is not technically inconsistent with each other.

[0114]

[0115] Additionally, terms such as “part,” “unit,” and “module” described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

[0116]

[0117] The following examples are provided as detailed explanations to aid understanding of the present invention and do not limit the scope of the invention. Therefore, inventions with the same scope and function as the present invention are also within the scope of the present invention.

[0118]

[0119] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0120]

[0121] FIG. 3 is a drawing showing the overall appearance of a rotary ribbed joint vascular anastomosis device according to an embodiment of the present invention, and FIG. 4 is a drawing showing a combined appearance of a rotary ribbed joint vascular anastomosis device according to an embodiment of the present invention. As shown in FIGS. 3 and 4, the rotary ribbed joint vascular anastomosis device according to an embodiment of the present invention is a vascular anastomosis device for connecting the ends of blood vessels, and includes a first vascular anastomosis device (100) that is fixedly fastened to the end of a first blood vessel to be connected; and a second vascular anastomosis device (100') that is fixedly fastened to the end of a second blood vessel connected to the first blood vessel. The first vascular anastomosis device (100) and the second vascular anastomosis device (100') may be configured as a pair that are fixedly fastened to each other by rotation in correspondence with each other.

[0122]

[0123] FIG. 5 is a drawing showing a detailed appearance of a first vascular anastomosis device (100) or a second vascular anastomosis device (100') in a rotary ribbed joint vascular anastomosis device according to an embodiment of the present invention. As shown in FIG. 5, in the rotary ribbed joint vascular anastomosis device according to an embodiment of the present invention, each of the first vascular anastomosis device (100) and the second vascular anastomosis device (100') may be configured to include a body (110), a ring device (120), and a connection unit (130), and may further include a safety device (140).

[0124]

[0125] Hereinafter, with reference to FIGS. 3 to 5, the detailed configuration of the first vascular suturing device (100) or the second vascular suturing device (100') in the rotary concave-convex vascular anastomosis device according to an embodiment of the present invention will be described in detail. Here, the first vascular suturing device (100) and the second vascular suturing device (100') have basically the same shape, but are configured as a pair in which the rotationally coupled parts correspond to each other, so the first vascular suturing device (100) and the second vascular suturing device (100') can be used without distinction between the left and right when suturing blood vessels.

[0126]

[0127] The body (110) may be a tubular body through which blood vessels can pass. As illustrated in FIG. 5, the body (110) is a short tubular body. However, in FIG. 5, the lower cross-section of the body (110) may be configured to be flat, and the upper cross-section (111) of the body (110) may be configured to be gently connected so that a wide portion (height of the body (110)) and a narrow portion intersect. More specifically, the body (110) may have a concave portion (112) formed at one end of the body (110) in which the width (or height) of the body (110) narrows, and a ring device (120) may be formed at the cross-section (111) of the concave portion (112).

[0128]

[0129] The ring device (120) is configured to fix a blood vessel at one end surface (111) of the body (110), and a plurality of ring devices (120) are positioned at one end surface (111) of the body (110), and the sharp ends can be bent inwardly of the body (110). As illustrated in FIG. 5, six ring devices (120) can be positioned at 60-degree intervals at each end surface (111) of the body (110). That is, the ring devices (120) can be positioned at the center of the end surface (111) of the concave portion (112) of the body (110) between the connecting units (130) and the connecting units (130), and can be configured to be the same size as or slightly protrude from the end surface (111) of the body (110) rather than the concave portion (112).

[0130]

[0131] FIG. 6 is a detailed view of a ring device (120) in a rotary ribbed fastening vascular anastomosis device according to an embodiment of the present invention. As illustrated in FIG. 5, in the rotary ribbed fastening vascular anastomosis device according to an embodiment of the present invention, the ring device (120) may be configured such that the tip is bent downward like a sharp beak of an eagle, so as to sharply penetrate the wall of a blood vessel. In addition, the ring device (120) may have a chin in the middle to prevent the fixed blood vessel from being detached.

[0132]

[0133] The connecting unit (130) is spaced apart from the body (110), and extends from one end to the outside of the body (110) between the ring device (120) of one end face (111) of the body (110), and a protrusion (131) and a groove (132) that are interlocked with each other so that the bodies (110) of the first vascular grafting device (100) and the second vascular grafting device (100') are fastened and connected by rotation can be formed.

[0134]

[0135] As illustrated in FIG. 5, the connecting units (130) may be arranged between ring devices (120) and may be rectangular in shape with a length longer than the height of the body (110), and may be connected in six pieces at 60-degree intervals to one end face (111) of the body (110). More specifically, the horizontal length of the connecting units (130) may be πr / 6, and the vertical length may be 1 and 3 / 5 of the width (height) of the body (110). Here, r is the radius of the body (110). In addition, the connecting units (130) are spaced apart parallel to the body (110), and a blood vessel is inserted into the spaced apart space during blood vessel anastomosis. The distance between the connecting units may be 0.2 to 0.5 mm in consideration of the thickness of the blood vessel.

[0136]

[0137] FIG. 7 is a drawing showing the appearance before fastening of the first vascular suturing device (100) and the second vascular suturing device (100') in a rotary ribbed fastening vascular anastomosis device according to an embodiment of the present invention, and FIG. 8 is a drawing showing the appearance after fastening of the first vascular suturing device (100) and the second vascular suturing device (100') in a rotary ribbed fastening vascular anastomosis device according to an embodiment of the present invention. As shown in FIGS. 7 and 8, the first vascular suturing device (100) and the second vascular suturing device (100') can be coupled to each other at one end surface (111) of the body (110) where the ring device (120) and the connecting unit (130) are connected, which is the opposite end surface. More specifically, the connection unit (130) of the first vascular synthesizer (100) may have a concave groove (132) formed in the rotational direction of the first vascular synthesizer (100), and the connection unit (130') of the second vascular synthesizer (100') may have a protrusion (131) formed in the rotational direction of the second vascular synthesizer (100') and corresponding to the groove (132). The first vascular synthesizer (100) and the second vascular synthesizer (100') may rotate in opposite directions so that the groove (132) and the protrusion (131) may be fastened and coupled.

[0138]

[0139] More specifically, in the first vascular grafting device (100), six rectangular connecting units (130) having concave grooves (132) may be arranged at 60-degree intervals, and in the second vascular grafting device (100') on the corresponding opposite side, six rectangular connecting units (130') having convex protrusions (131) may be arranged at 60-degree intervals. Here, the first vascular grafting device (100) and the second vascular grafting device (100') may be interchangeable with each other.

[0140]

[0141] The horizontal length of the convex protrusion (131) may be 3 / 5 of the horizontal length of the connecting unit (130, 130'), and the vertical length may be 2 / 5 of the vertical length of the connecting unit (130, 130'). The concave groove (132) has horizontal and vertical lengths corresponding to those of the convex protrusion (131). The portion of the connecting unit (130, 130') extending from one end face (111) of the body (110) may be in the shape of a circular or square pillar, and the contact surface of the body (110) may be configured as wide as possible without interfering with blood vessel fixation, so as to be firmly attached.

[0142]

[0143] The three sides of the projection (131) can be configured so that the center is slightly convex and the surface that receives the projection (131) in the groove (132) is concave so that the joint state is well maintained without radially detaching after joining. That is, the device that prevents the stapler from radially detaching is configured so that the center of the three sides of the projection (131) on the surface where the convex projection (131) and the concave projection (131) of the stapler are joined is slightly convex and the surface that receives the projection (131) in the groove (132) is concave. If it depends only on the force of one joint, the radial safety device may be weak, but since it occurs simultaneously in six connecting units (130) at 60-degree intervals, detachment can be prevented.

[0144]

[0145] Hereinafter, a method for vascular anastomosis using a rotary ribbed fastening vascular anastomosis device according to one embodiment of the present invention will be described. The end of the blood vessel is turned over so that the inner wall of the blood vessel passes through the body (110) and faces outward, and the blood vessel is inserted into a space spaced between the body (110) and the connecting unit (130), and the end of the blood vessel is fixed to the ring device (120), and the first vascular anastomosis device (100) to which the end of the first blood vessel is fixed and the second vascular anastomosis device (100') to which the end of the second blood vessel is fixed rotate in opposite directions so that the connecting unit (130) can be fastened and connected.

[0146]

[0147] More specifically, the first and second blood vessels to be anastomosed are turned over 180 degrees in the other cross-section of the body (110) and the ends of the blood vessels are sequentially hooked onto the ring device (120). At this time, the blood vessels are inserted into the space between the body (110) and the connecting unit (130) and hooked onto the ring device (120) in the cross-section (111) of the concave portion (112) of the body (110), so that the blood vessels can be fixed without interference from the connecting unit (130).

[0148]

[0149] Then, when pulling the blood vessels on both sides to come into proximity, as illustrated in FIG. 7, one connecting unit (130) is moved into the space between the connecting units (130) on the opposite sides until the blood vessels on both sides are completely in contact with each other. When the blood vessels are in precise contact, as illustrated in FIG. 8, the first vascular stapler (100) on the left rotates counterclockwise and the second vascular stapler (100') on the right rotates clockwise to fasten the staplers. Depending on the embodiment, a stapler loader that holds and moves the stapler may be required to ensure precise fastening.

[0150]

[0151] A safety device (140) can be formed in at least one corresponding protrusion (131) and groove (132) of the connecting unit (130) to prevent the connection from becoming loose or being separated. At this time, the safety device (140) can be in a spherical or hexahedral shape.

[0152]

[0153] FIG. 9 is a drawing showing the appearance of a spherical safety device (140) in a rotary ribbed fastening vascular anastomosis device according to an embodiment of the present invention, and FIG. 10 is a drawing showing the appearance of a hexahedral safety device (140) in a rotary ribbed fastening vascular anastomosis device according to an embodiment of the present invention. As shown in FIGS. 9 and 10, the safety device (140) of the rotary ribbed fastening vascular anastomosis device according to an embodiment of the present invention can be formed in a protrusion (131) and a groove (132) so as to contact each other when the first vascular anastomosis device (100) and the second vascular anastomosis device (100') are fastened and connected. That is, in order to prevent the stent from retreating in the opposite direction to the joining direction after a pair of vascular stents are connected, a spherical or rectangular prism-shaped stent (131) can be formed on the end of the protrusion (131) on the convex surface of the connecting unit (130) and the back surface of the groove (132).

[0154]

[0155] More specifically, as illustrated in FIG. 9, the safety device (140) may be configured to have a spherical shape and serve as a suture holder, such that the spherical safety devices (140) that are in contact with each other can be tightened using a suture. In other words, it may serve as a mooring post for securing a ship in a port.

[0156]

[0157] More specifically, as illustrated in FIG. 10, the safety device (140) may be configured in a hexahedral shape with screw grooves formed inside, such that the screw grooves that are in contact with each other can be fastened and fixed with screws. That is, the safety device (140) in the shape of a rectangular parallelepiped has screw grooves corresponding to each other in the center so that the fastening parts on both sides can be fastened and fixed with screws. This safety device (140) does not need to be implemented in all six connecting units (130), and can be configured in only one or two connecting units (130). Since the six connecting units (130) are in a relationship where they bite and bite in one direction, it is sufficient to prevent detachment even if it is fixed in only one place.

[0158]

[0159] Meanwhile, each of the first vascular grafting device (100) and the second vascular grafting device (100') may be composed of an absorbent material. Here, the absorbent material may be any one absorbent polymer selected from the group consisting of poly-lactic acid (PLA), poly-glycolic acid (PGA), polycaprolactone (PCL), and poly-lacticoglycolic acid (PLGA).

[0160]

[0161] The vascular grafting device, manufactured by Synovis, a U.S. company widely used in surgery, is non-absorbable and is used for microvascular anastomoses with a diameter of 1 to 3 mm. Because it is non-absorbable, it remains permanently in the body, potentially acting as a foreign body and potentially compressing surrounding blood vessels or nerves, potentially causing complications. Furthermore, if placed directly under the skin, it may penetrate the skin and become exposed, requiring the grafting device to be adequately covered with soft tissue.

[0162]

[0163] All blood vessels are elastic and regulate the amount of blood supplied to organs and tissues. When an organ requires increased blood supply, the blood vessels expand. If a non-absorbable graft is used at the site of vascular anastomosis, the vessels in that area will always have a constant caliber, limiting their ability to function as vessels. Therefore, ideally, a graft for organ transplantation would be absorbed by the body after the vessel is fully connected, allowing the graft to restore its natural elasticity. Vascular connection typically takes approximately 2-3 weeks, and complete histological recovery takes approximately 3-4 months. Therefore, vascular graft devices can be constructed from the absorbable polymers described above. PLA is particularly suitable, considering its absorption time and strength. These materials are the primary components of sutures used in the human body and are therefore highly suitable as vascular graft materials.

[0164]

[0165] As described above, according to the rotary ribbed fastening vascular anastomosis device proposed in the present invention, it includes a first vascular anastomosis device (100) that is fastened and fixed to an end of a first blood vessel to be connected, and a second vascular anastomosis device (100') that is fastened and fixed to an end of a second blood vessel connected to the first blood vessel. The first vascular anastomosis device (100) and the second vascular anastomosis device (100') are configured as a pair that are fastened and fixed to each other by rotation in response to each other, so that the pair of vascular anastomosis devices are firmly fixed and coupled through rotation, and can be used for connecting thick blood vessels. In addition, the sharp end of the ring device (120) that fixes the blood vessel can be bent inward into the body (110) to sharply penetrate the wall of the blood vessel, and a jaw is configured in the middle of the ring device (120) to hold the blood vessel so that it does not easily come off once it is fastened. In addition, by further including a safety device (140) in at least one corresponding part of the connecting unit (130), the connection of the vascular grafting device can be prevented from becoming loose or separated.

[0166]

[0167] The foregoing description of the present invention is provided for illustrative purposes only, and those skilled in the art will readily appreciate that the present invention can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single entity may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined manner.

[0168]

[0169] The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

Claims

1. As a vascular anastomosis device for connecting the ends of blood vessels, A first blood vessel ligation device (100) that is fixedly fastened to the end of the first blood vessel to be connected; and Including a second blood vessel ligature (100') that is fixedly fastened to the end of a second blood vessel connected to the first blood vessel, The above first vascular grafting machine (100) and the second vascular grafting machine (100') are A rotary vascular anastomosis device characterized in that it comprises a pair of devices that are connected by rotation in response to each other.

2. In the first paragraph, each of the first vascular grafting machine (100) and the second vascular grafting machine (100') Tubular body (110); A configuration for fixing a blood vessel in one section (111) of the body (110), a ring device (120) positioned in multiple numbers in one section (111) of the body (110), the sharp end of which is bent inwardly into the body (110); and A rotary concave-convex fastening vascular anastomosis device characterized by including a connecting unit (130) spaced apart from the body (110), one end of which extends outward from the body (110) between the ring device (120) of one end face (111) of the body (110), and having a protrusion (131) and a groove (132) formed therein that engage with each other so that the bodies (110) of the first vascular anastomosis device (100) and the second vascular anastomosis device (100') are fastened and connected by rotation.

3. In the second paragraph, the body (110) A rotary concave-convex vascular anastomosis device characterized in that a concave portion (112) is formed at one end of the body (110) so that the width of the body (110) becomes narrower, and the ring device (120) is formed on the cross-section (111) of the concave portion (112).

4. In the second paragraph, the first vascular grafting device (100) and the second vascular grafting device (100') are A rotary concave-convex vascular anastomosis device characterized in that the opposite end surface (111) of the body (110) to which the ring device (120) and the connection unit (130) are connected is coupled to each other.

5. In the second paragraph, the ring device (120) A rotary ligature-fastening vascular anastomosis device characterized by having a chin in the middle portion to prevent the fixed blood vessel from being dislodged.

6. In the second paragraph, the ring device (120) A rotary vascular anastomosis device characterized in that six of them are arranged at 60-degree intervals on one cross section (111) of the above body (110).

7. In the 6th paragraph, the connecting unit (130) A rotary concave-convex vascular anastomosis device characterized in that six of them are connected at 60-degree intervals to one section (111) of the body (110) and are arranged between the ring devices (120).

8. In paragraph 2, The connecting unit (130) of the first vascular grafting machine (100) has a concave groove (132) formed in the rotational direction of the first vascular grafting machine (100). The connecting unit (130) of the second vascular grafting device (100') is formed with a protrusion (131) that is convex in the rotational direction of the second vascular grafting device (100') and corresponds to the groove (132). A rotary vascular anastomosis device characterized in that the first vascular anastomosis device (100) and the second vascular anastomosis device (100') rotate in opposite directions so that the groove (132) and the protrusion (131) are fastened and joined.

9. In paragraph 8, A rotary concave-convex fastening vascular anastomosis device characterized in that the end of the blood vessel is turned over so that the inner wall of the blood vessel faces outward while passing through the body (110). The blood vessel is inserted into a space separated from the body (110) and the connection unit (130), the end of the blood vessel is fixed to the ring device (120), and the first blood vessel anastomosis device (100) to which the end of the first blood vessel is fixed and the second blood vessel anastomosis device (100') to which the end of the second blood vessel is fixed rotate in opposite directions so that the connection unit (130) is fastened and connected.

10. In the second paragraph, the connecting unit (130) A rotary vascular anastomosis device characterized by having a rectangular shape with a length longer than the height of the body (110).

11. In the second paragraph, each of the first vascular grafting device (100) and the second vascular grafting device (100') A rotary concave-convex vascular anastomosis device characterized in that it further includes a safety device (140) formed on at least one corresponding protrusion (131) and groove (132) of the above connecting unit (130) to prevent the connection from becoming loose or separated.

12. In the 11th paragraph, the safety device (140) A rotary vascular anastomosis device characterized in that the projection (131) and the groove (132) are formed so as to contact each other when the first vascular anastomosis device (100) and the second vascular anastomosis device (100') are fastened and connected.

13. In the 12th paragraph, the safety device (140) A rotary concave-convex vascular anastomosis device characterized in that it is configured to have a spherical shape and to act as a suture holder, and to be configured to tighten and tie the spherical safety devices (140) that are in contact with each other using a suture.

14. In the 12th paragraph, the safety device (140) A rotary concave-convex vascular anastomosis device characterized by being configured in a hexahedral shape with screw grooves formed inside, and configured to be able to fasten and fix screw grooves that are in contact with each other with screws.

15. In the second paragraph, each of the first vascular grafting device (100) and the second vascular grafting device (100') A rotary ligature-type vascular anastomosis device characterized by being composed of an absorbent material.

16. In paragraph 15, the absorbent material is A rotary ligature vascular anastomosis device characterized by being any one absorbable polymer selected from the group consisting of poly-lactic acid (PLA), poly-glycolic acid (PGA), polycaprolactone (PCL) and poly-lacticoglycolic acid (PLGA).

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