Large blood vessel anastomat

Abstract

The invention belongs to the technical field of medical apparatus and instruments, and provides a large vessel anastomat which comprises an inner sleeve ring, an outer sleeve ring, an outer sleeve ring and an inner sleeve ring, the inner sleeve ring is hollow, the two ends of the inner sleeve ring are open, and the inner sleeve ring comprises two first semi-cylinders with semicircular cross sections, and the two first semi-cylinders are buckled with each other; the outer lantern ring is hollow, the two ends of the outer lantern ring are open, the outer lantern ring comprises two lantern ring assemblies with semicircular cross sections, each lantern ring assembly comprises a second half cylinder, the cross section of each second half cylinder is semicircular, the inner side of each second half cylinder is provided with a plurality of containing groove sets, and the containing groove sets are sequentially arranged at intervals along the circle center line of the second half cylinder; a plurality of accommodating grooves are formed in each accommodating groove group, the plurality of accommodating grooves in each accommodating groove group are uniformly formed around the circle center line of the second half cylinder body, and U-shaped anastomosis nails are arranged in the accommodating grooves; the pushing mechanism is used for pushing the anastomosis nails out of the containing groove. The large vessel anastomat is simple in structure, high in anastomosis efficiency and good in anastomosis quality.

Description

Technical Field

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

[0002] In cardiovascular surgery, organ transplantation surgery, and other fields, major vascular anastomosis is a core operational step in ensuring surgical success and postoperative patient safety. Its main function is to repair, replace, or connect diseased blood vessels to restore normal blood circulation pathways. Currently, in clinical and research settings, the mainstream technique for major vascular anastomosis is still manual suture anastomosis. While this technique has met basic anastomosis needs to some extent since its application, its inherent limitations have gradually become key factors restricting the optimization of surgical quality and improvement of patient prognosis as medical technology continues to demand higher precision, efficiency, and safety.

[0003] The existing suture anastomosis technique mainly includes the following steps: First, medical staff need to use microsurgical instruments or conventional surgical instruments to align and fix the two severed ends of the large blood vessels to be anastomosed, ensuring the corresponding layers of the intima, media, and adventitia. Then, using non-absorbable or absorbable sutures (such as polypropylene sutures, polyester sutures, etc.), the vessel wall tissue at the severed ends is sutured and fixed one stitch at a time through interrupted sutures, continuous sutures, or mattress sutures. During this process, the suture tension needs to be repeatedly adjusted to avoid tearing of the vessel wall due to excessive tension or leakage at the anastomosis site due to insufficient tension. Finally, after suturing is completed, the anastomosis needs to be checked for sealing. If any leakage points are found, additional suturing is required until it is confirmed that there is no leakage at the anastomosis site and the blood vessels are patent.

[0004] However, this technical solution has the following significant problems:

[0005] 1. The procedure is highly complex and extremely dependent on the operator's skills: Large blood vessels have complex wall structures (containing three layers of tissue with different textures: the intima, media, and adventitia), and the vessel diameter is usually greater than 5mm. During suturing, precise control of the tissue layers and depth through which the suture penetrates is required to avoid damaging the intima (intimal damage easily leads to thrombosis) or suturing too superficially, which can cause anastomosis loosening. This necessitates that operators have a long-term professional training background and rich clinical experience. Novice medical staff often need several months to several years of learning before they can independently complete high-quality large blood vessel suture anastomosis, greatly limiting the popularization and promotion of this technique.

[0006] 2. Low anastomosis efficiency and prolonged surgery time with vascular ischemia: Using conventional manual suture anastomosis, completing one anastomosis usually takes 30-60 minutes. If multiple vessels are involved (such as the aorta and pulmonary artery double anastomosis in heart transplantation), the total suturing time can exceed 2 hours. Excessive operation time directly increases the total operation time, which not only increases the risk of intraoperative infection and anesthetic complications for the patient. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the purpose of this invention is to provide a large blood vessel anastomosis device to solve or alleviate the above-mentioned technical problems existing in the prior art.

[0008] To achieve the above objectives, the present invention provides a large blood vessel anastomosis device, comprising:

[0009] The inner ring is hollow and open at both ends. The inner ring includes two first semi-cylindrical bodies with semi-circular cross-sections. The two first semi-cylindrical bodies are interlocked and the first sides of the two first semi-cylindrical bodies are hinged to each other, and the second sides can move closer to or further away from each other around their own hinge center line.

[0010] An outer ring, hollow and open at both ends, the outer ring comprising two collar assemblies with semi-circular cross-sections, the collar assembly comprising:

[0011] The second half-cylinder has a semi-circular cross-section. The first side of the second half-cylinder of the two collar assemblies is hinged, and the second side can move closer or further apart around its own hinge centerline. Multiple sets of receiving grooves are provided on the inner side of the second half-cylinder. These sets of receiving grooves are arranged sequentially and at intervals along the centerline of the second half-cylinder. Each set of receiving grooves contains multiple receiving grooves, which are evenly distributed around the centerline of the second half-cylinder. The multiple receiving grooves in any two adjacent sets are staggered, and within the same radial plane, the projections of the receiving grooves in the preceding set overlap with those in the following set. A U-shaped staple is provided within each receiving groove. In its natural state, the staple remains within the receiving groove. When the radial thrust on the staple exceeds a preset value, the staple can move radially along the second half-cylinder.

[0012] A pushing mechanism, which is disposed on the second half-cylinder, is used to apply force to the anastomosis staple to push the staple out of the receiving groove, thereby causing the staple to penetrate the blood vessel wall outside the inner sleeve and form a bend for fixation.

[0013] Furthermore, the inner sleeve also includes a first elastic element, which is disposed at the hinge center of the two first half-cylinders. The two ends of the first elastic element abut against the two first half-cylinders respectively. In its natural state, the first elastic element applies elastic force to the two first half-cylinders so that the second sides of the two first half-cylinders always maintain a tendency to move towards each other.

[0014] Furthermore, a first operating handle is provided on the first side of the first half-cylinder.

[0015] Furthermore, the actuation mechanism includes:

[0016] The first pushing block is radially slidably connected to the second half-cylinder, so that the first pushing block can only move radially along the second half-cylinder;

[0017] The third elastic element has its two ends connected to the first pushing block and the second half-cylinder respectively. In its natural state, the third elastic element applies elastic force to the first pushing block so that the first pushing block has a tendency to move away from the center line of the second half-cylinder.

[0018] The second pushing block corresponds one-to-one with the first pushing block. The second pushing block is disposed outside the first pushing block. The second pushing block is slidably connected to the second half-cylinder along the axial direction so that the second pushing block can only move along the axial direction of the second half-cylinder.

[0019] The first push block and the second push block are provided with a first guide slope and a second guide slope that cooperate with each other on opposite sides. During operation, the axial movement of the second push block is converted into the radial movement of the first push block through the cooperation of the first guide slope and the second guide slope.

[0020] A drive structure is disposed on the second half-cylinder, the drive structure being used to drive the second push block to move.

[0021] Furthermore, the driving structure includes:

[0022] A reel is disposed inside the second half-cylinder and is rotatably connected to the second half-cylinder;

[0023] A knob, disposed outside the second half-cylinder and rotatably connected to it, is drively connected to the reel to drive the reel to rotate; and

[0024] The pull rope has its first end connected to the second push block and its second end connected to the reel.

[0025] Furthermore, the outer ring also includes a second elastic element, which is disposed at the hinge center of the two second half-cylinders. The two ends of the second elastic element are respectively hinged to the two second half-cylinders. In its natural state, the second elastic element applies elastic force to the two second half-cylinders so that the second sides of the two second half-cylinders always maintain a tendency to move towards each other.

[0026] Furthermore, a second operating handle is provided on the first side of the second half-cylinder.

[0027] Furthermore, a guide groove is provided on the outer side wall of the inner sleeve, the depth of the guide groove is greater than the thickness of the staple, and guide surfaces are provided at both ends of the guide groove.

[0028] Furthermore, the outer ring also includes a cutting blade, which corresponds one-to-one with the first pushing block. The cutting blade is arc-shaped and is disposed on the inner side of the first pushing block. The cutting blade is fixedly connected to the first pushing block, and the opposite ends of any two adjacent cutting blades overlap each other.

[0029] The beneficial effects of this invention are:

[0030] The large vessel anastomosis device provided by this invention has an openable and closable structural design, which allows the inner or outer ring to be switched to an open state, thereby easily fitting onto or removing from the target vessel or inner ring, shortening the operation time and improving the operation efficiency.

[0031] With its flexible, self-resetting structure, the system automatically clamps the blood vessel or inner ring after the operating handle is released, eliminating the need for additional tools. This reduces hand operations during surgery, allowing doctors to focus on vascular positioning and staple triggering, shortening surgical time and improving efficiency.

[0032] By setting a first operating handle for the inner ring and a second operating handle for the outer ring, it can be operated using medical tools, thereby switching the inner and outer rings to the open state. This is especially suitable for surgical scenarios where the blood vessel position is fixed and the operating space is limited (e.g., the thoracic cavity).

[0033] By setting the receiving groove on the inner side of the outer ring to be "evenly distributed around the center line and spaced along the center line", the anastomotic staples can cover the anastomosis area in a ring and multiple rows, avoiding poor adhesion caused by sparse local anastomotic staples, ensuring uniform stress on the blood vessel wall, and reducing the risk of postoperative bleeding or leakage.

[0034] Furthermore, during the anastomosis process, both the inner and outer rings are placed "outside the blood vessel," and the anastomotic staples only penetrate the vessel wall (for fixation). The inner ring provides support to prevent excessive penetration, eliminating the need for the "cut-and-suture" technique used in traditional surgery and reducing the trauma area to the vessel wall. When the end of the first blood vessel is folded over and placed on the inner ring, the inner ring provides rigid support, preventing rupture of the first blood vessel due to excessive stretching or compression during folding, while maintaining the patency of the artificial blood vessel lumen and preventing stenosis after folding.

[0035] Furthermore, this design ensures that the anastomosis point between the first and second blood vessels is located outside the vessels, preventing post-anastomosis stenosis. It also changes the stress at the anastomosis site from axial to radial, effectively increasing the anastomosis area and improving anastomosis strength. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0037] Figure 1 This is a perspective view of a large blood vessel anastomosis device provided in an embodiment of the present invention;

[0038] Figure 2 for Figure 1 An exploded three-dimensional view of the large blood vessel anastomosis device shown;

[0039] Figure 3 for Figure 1 An exploded perspective view of the inner ring of the large blood vessel anastomosis device shown;

[0040] Figure 4 for Figure 1 An exploded three-dimensional view of the outer ring of the large blood vessel anastomosis device shown;

[0041] Figure 5 for Figure 4 A perspective view of the internal structure of the inner collar assembly shown.

[0042] Figure 6 for Figure 5 An enlarged view of part A is shown below;

[0043] Figure 7 for Figure 5 An enlarged view of section B is shown below;

[0044] Figure 8 for Figure 1 A three-dimensional view of the combination of the inner collar of the large vessel anastomosis device and the first vessel.

[0045] Figure 9 for Figure 1 A three-dimensional view of the combination of the inner collar of the large vessel anastomosis device with the first and second vessels.

[0046] Figure 10 for Figure 1 A cross-sectional view of the large blood vessel anastomosis device shown;

[0047] Figure 11 for Figure 10 An enlarged view of section C is shown;

[0048] Figure 12 for Figure 1 A three-dimensional view of the combination of the first push block, the second push block, and the anastomotic staples of the large blood vessel anastomosis device.

[0049] Figure label:

[0050] 100. Inner collar; 110. First half-cylinder; 111. First operating handle; 112. Guide groove; 113. First limiting part; 114. Positioning protrusion; 120. First elastic element; 130. First hinge shaft; 200. Outer collar; 210. Second half-cylinder; 211. Second operating handle; 212. Receiving groove; 213. Second limiting part; 214. Positioning groove; 220. Anastomosing staple; 230. Second spring Components; 241, First push block; 201, First guide ramp; 202, Pushing part; 242, Third elastic component; 243, Second push block; 203, Second guide ramp; 244, Roller; 245, Knob; 246, Pull rope; 247, Connecting block; 250, Cutting blade; 260, Second hinge shaft; 270, First guide rod; 280, Second guide rod; 310, First blood vessel; 320, Second blood vessel. Detailed Implementation

[0051] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0052] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0053] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0054] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0055] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] like Figure 1-12 As shown, the present invention provides a large blood vessel anastomosis device, including an inner ring 100 and an outer ring 200.

[0058] The inner ring 100 is hollow and open at both ends. It includes two first semi-cylindrical bodies 110 with semi-circular cross-sections. The two first semi-cylindrical bodies 110 are interlocked, and their first sides are hinged together, specifically via a first hinge shaft 130. The second sides of the two first semi-cylindrical bodies can move closer or further apart around their own hinge center line to form two working states: a closed state and an open state.

[0059] When the two first semi-cylindrical bodies 110 are in the closed state, their second sides fit together to form a complete cylindrical body, which is used to fit the outer wall of the blood vessel and provide anastomosis support. When the two first semi-cylindrical bodies 110 are in the open state, their second sides are open to form an open notch, which allows them to be directly inserted into the target blood vessel (artificial blood vessel or the body's own large blood vessel) from the side or removed from the blood vessel without having to be fitted along the axial direction of the blood vessel, greatly simplifying the operation process and improving surgical efficiency.

[0060] To facilitate the switching of the state of the first half-cylinder 110, a first operating handle 111 is provided on the first side of the two first half-cylinders 110. During operation, torque is applied to the first half-cylinder 110 through the first operating handle 111 to drive the two first half-cylinders 110 to rotate around their own hinge center line, thereby realizing the switching between the closed state and the open state.

[0061] It should be noted that two operating modes are supported during the actual surgery. When there is sufficient operating space, the first operating handle 111 can be operated by manual pressing. When the blood vessel position is fixed and the operating space is limited (e.g., the thoracic cavity), the first operating handle 111 is operated by pressing with the help of auxiliary tools (e.g., forceps).

[0062] Preferably, the first operating handle 111 is provided with two first limiting parts 113, and a clamping groove is formed between the two first limiting parts to engage the clamping end of the auxiliary tool, thereby effectively avoiding the problem of tool slippage during pressing, and thus improving the stability and safety of operation.

[0063] To reduce the strain on the hands of medical staff during surgery, a first elastic element 120 is provided at the hinge center of the two first semi-cylinders. The two ends of the first elastic element 120 abut against the two first semi-cylinders 110 respectively. In its natural state, the first elastic element 120 applies a spring force to the two first semi-cylinders 110, causing the second sides of the two first semi-cylinders 110 to always tend to move closer to each other. This ensures that the two first semi-cylinders 110 remain in a closed state under the elastic force of the first elastic element 120 when no external force is applied. When the external force is released (i.e., the first operating handle 111 is released), the two first semi-cylinders 110 automatically return to the closed state under the elastic force of the first elastic element 120, thereby reducing the surgeon's hand movements during surgery and improving surgical efficiency.

[0064] Specifically, the first elastic element 120 is sleeved on the first hinge shaft 130. In this embodiment, the first elastic element 120 is a torsion spring, whose elastic modulus and deformation recovery performance are adapted to the surgical operation requirements; in other alternative embodiments, the first elastic element 120 may also be a component with the same torsional elastic function, such as a spiral torsion spring.

[0065] The outer ring 200 is used in conjunction with the inner ring. The outer ring 200 is hollow and open at both ends. The outer ring 200 includes two ring assemblies with semi-circular cross-sections. The two ring assemblies are interlocked, and their first sides are hinged. Specifically, the two ring assemblies are hinged via a second hinge shaft 260. The second sides of the two ring assemblies can move closer or further apart around their own hinge center line to form two working states: a closed state and an open state.

[0066] When the two collar assemblies are in the closed state, their second sides fit together to form a complete cylindrical body for fitting the outer wall of the blood vessel. When the two collar assemblies are in the open state, their second sides are open to form an open notch, allowing them to be directly slipped onto or removed from the inner collar 100 from the side, greatly simplifying the operation and improving surgical efficiency.

[0067] To facilitate the switching of the collar assembly's state, a second operating handle 211 is provided on the first side of the collar assembly. During operation, torque is applied to the collar assembly via the second operating handle 211 to drive the two collar assemblies to rotate around their own hinge center line, thereby achieving the switching between the closed and open states.

[0068] It should be noted that two operating modes are supported during actual surgery. When there is sufficient operating space, the second operating handle 211 can be operated by manual pressure. When the blood vessel position is fixed and the operating space is limited (e.g., the thoracic cavity), the second operating handle 211 is operated by pressing with the help of auxiliary tools (e.g., forceps).

[0069] Preferably, the second operating handle 211 is provided with two second limiting parts 213, and a clamping groove is formed between the two second limiting parts 213 to engage the clamping end of the auxiliary tool, thereby effectively avoiding the problem of tool slippage during pressing, and thus improving the stability and safety of operation.

[0070] Similarly, to reduce the burden on the hands of medical staff during surgery, a second elastic element 230 is installed at the hinge center of the two collar assemblies. The two ends of the second elastic element 230 are hinged to the two collar assemblies respectively. In its natural state, the second elastic element 230 applies a spring force to the two collar assemblies, causing the second sides of the two collar assemblies to always tend to move closer to each other. This ensures that the two collar assemblies remain in a closed state under the action of the second elastic element 230 when no external force is applied. When the external force is released (i.e., the second operating handle 211 is released), the two collar assemblies automatically return to the closed state under the spring force of the second elastic element 230, thereby reducing the surgeon's hand movements during surgery and improving surgical efficiency.

[0071] Specifically, the second elastic element 230 is sleeved on the second hinge shaft 260. In this embodiment, the second elastic element 230 is a torsion spring, whose elastic modulus and deformation recovery performance are adapted to the requirements of surgical operation; in other embodiments, the second elastic element 230 may also be a component with the same torsional elastic function, such as a spiral torsion spring.

[0072] Specifically, the collar assembly includes a second half-cylinder 210 and a pushing mechanism.

[0073] The second half-cylinder 210 has a semi-circular cross-section, and the first side of the second half-cylinder 210 of the two collar assemblies is hinged. Specifically, the second half-cylinder 210 of the two collar assemblies is hinged through a second hinge shaft 260.

[0074] The second sides of the second half-cylinder 210 of the two collar assemblies can move closer or further apart around their own hinge centerline to form two working states: a closed state and an open state.

[0075] When the two second half-cylinders 210 are in a closed state, the second sides of the two second half-cylinders 210 are attached to each other to form a cylinder; when the two second half-cylinders 210 are in an open state, the second sides of the two second half-cylinders 210 are open to form an open gap.

[0076] The second operating handle 211 is located on the first side of the second half-cylinder 210. During operation, torque is applied to the second half-cylinder 210 through the second operating handle 211 to drive the second half-cylinder 210 to rotate.

[0077] The aforementioned second elastic element 230 is disposed at the hinge center of the two second semi-cylinders 210. Both ends of the second elastic element 230 are hinged to the two second semi-cylinders 210 respectively. In its natural state, the second elastic element 230 applies a spring force to the two second semi-cylinders 210, causing the second sides of the two second semi-cylinders 210 to always tend to move closer to each other. This ensures that the two second semi-cylinders 210 remain in a closed state under the action of the second elastic element 230 when no external force is applied. When the external force is released (i.e., the second operating handle 211 is released), the two second semi-cylinders automatically return to the closed state under the spring force of the second elastic element 230, thereby reducing the surgeon's hand movements during the operation and improving surgical efficiency.

[0078] Multiple sets of receiving grooves are provided on the inner side of the second semi-cylinder 210. These sets of receiving grooves are arranged sequentially and at intervals along the center line of the second semi-cylinder 210, with the spacing determined according to the clinical needs of vascular anastomosis. Each set of receiving grooves contains multiple receiving grooves 212, which are evenly distributed around the center line of the second semi-cylinder 210. This allows the anastomotic staples 220 to cover the anastomosis area in a ring-like, multi-row manner, avoiding loose adhesion caused by sparse local anastomotic staples 220, ensuring uniform stress on the vessel wall, and reducing the risk of postoperative bleeding or leakage. The multiple receiving grooves 212 in any two adjacent sets of receiving grooves are staggered, and within the same radial plane, the projections of the preceding set of receiving grooves 212 and the following set of receiving grooves overlap. That is, the projection of any one receiving groove 212 and the adjacent receiving groove 212 in the adjacent receiving groove group on the plane perpendicular to the center line of the second half-cylinder 210 has an overlapping area with an overlap rate of 20%-40%, so as to ensure that the anastomosis staple can completely cover the anastomosis area, thereby avoiding the problem of loose anastomosis.

[0079] The receiving groove 212 is provided with a U-shaped staple 220. Under natural conditions (i.e., when the staple 220 is not subjected to external force), the staple 220 can be held in the receiving groove 212. When the radial thrust on the staple 220 exceeds a preset value, the staple 220 can move radially toward the inner collar 110 along the second half-cylinder 210.

[0080] The pushing mechanism is located inside the second half-cylinder 210. The pushing mechanism is used to apply force to the anastomosis staple 220 to push the anastomosis staple 220 out of the receiving groove 212, so that the anastomosis staple 220 passes through the blood vessel wall outside the inner collar 100 and forms a bend to fix it, thereby achieving a tight anastomosis of the two blood vessels.

[0081] Working principle: During operation, the inner ring 100 is first placed near the end of the first blood vessel 310 (artificial blood vessel or the body's own large blood vessel). Specifically, torque is applied to the first operating handle 111 by manual pressing or pressing with a tool to switch the inner ring 100 to the open state. After the inner ring 100 is placed on the artificial blood vessel, the first operating handle 111 is released. Under the elastic force of the first elastic element 120, the inner ring 100 switches from the open state to the closed state, thereby achieving the purpose of placing the inner ring 100 on the first blood vessel 310.

[0082] Then, the end of the first blood vessel 310 is folded over so that the end of the first blood vessel 310 is fitted onto the inner sleeve.

[0083] Then, the second blood vessel 320 (an artificial blood vessel or the body's own large blood vessel) is fitted onto the fold of the first blood vessel 310.

[0084] Next, the outer ring 200 is fitted onto the inner ring 100. Specifically, torque is applied to the second operating handle 211 by manual pressing or pressing with a tool to switch the outer ring 200 to the open state. After the outer ring 200 is fitted onto the inner ring 100, the second operating handle 211 is released. Under the elastic force of the second elastic element 230, the outer ring 200 switches from the open state to the closed state, thereby achieving the purpose of fitting the outer ring 200 onto the inner ring 100.

[0085] Next, the driving mechanism applies force to the anastomosis staple 220, thereby pushing the anastomosis staple 220 out of the receiving groove 212. After the end of the anastomosis staple 220 passes through the second blood vessel 320 and the first blood vessel 310 in sequence, the end of the anastomosis staple 220 abuts against the inner collar 100. Under the action of the inner collar 100, the end of the anastomosis staple 220 bends to form a B-shape, thereby achieving the purpose of anastomosing the second blood vessel 320 and the first blood vessel 310.

[0086] Next, remove the outer ring 200 and the inner ring 100 in sequence.

[0087] The inner ring 100 and outer ring 200 of the large blood vessel anastomosis device provided in this embodiment have an openable and closable structural design, which allows the inner ring 100 or outer ring 200 to be switched to an open state, thereby easily fitting onto or removing from the target blood vessel or inner ring 100, shortening the operation time and improving the operation efficiency.

[0088] With its flexible, self-resetting structure, the system automatically clamps the blood vessel or inner ring 100 after the operating handle is released, eliminating the need for additional tools. This reduces hand manipulation during surgery, allowing doctors to focus on vascular positioning and anastomosis staple 220 triggering, shortening surgical time and improving surgical efficiency.

[0089] By setting a first operating handle 111 for the inner ring 100 and a second operating handle 211 for the outer ring 200, it is possible to operate using medical tools, thereby switching the inner ring 100 and the outer ring 200 to the open state, which is especially suitable for scenarios where the blood vessel position is fixed and the operating space is limited during surgery (e.g., the thoracic cavity).

[0090] Multiple rows of staggered, circular staples ensure uniform stress on the vessel wall, reducing the risk of postoperative bleeding or leakage.

[0091] Furthermore, during the anastomosis process, both the inner ring 100 and the outer ring 200 are "placed outside the blood vessel," and the anastomotic staples 220 only penetrate the blood vessel wall (for fixation). The inner ring 100 provides support to prevent excessive penetration, eliminating the need for "cutting and suturing" the blood vessel as in traditional surgery, thus reducing the trauma area to the blood vessel wall. When the end of the first blood vessel 310 is folded over and placed on the inner ring 100, the inner ring 100 provides rigid support, preventing the first blood vessel 310 from rupturing due to excessive stretching or compression during the folding process. Simultaneously, it maintains the patency of the artificial blood vessel lumen and prevents stenosis after folding.

[0092] Furthermore, this design ensures that the anastomosis point between the first blood vessel 310 and the second blood vessel 320 is located outside the blood vessel, preventing post-anastomosis stenosis. Simultaneously, it not only changes the force at the anastomosis site from axial to radial, but also effectively increases the anastomosis area and improves anastomosis strength.

[0093] like Figure 5 , Figure 6 , Figure 7 , Figure 10 , Figure 11 and Figure 12 As shown, in this embodiment, the pushing mechanism includes a first pushing block 241, a third elastic element 242, a second pushing block 243, and a driving structure.

[0094] The first pushing block 241 is radially slidably connected to the second semi-cylinder 210, so that the first pushing block 241 can only move radially (towards or away from the inner sleeve 100) of the second semi-cylinder 210. Specifically, a first guide rod 270 is fixedly installed inside the second semi-cylinder 210, and a guide hole is provided on the first pushing block 241 to cooperate with the first guide rod 270. Through the cooperation between the first guide rod 270 and the guide hole, the movement direction of the first pushing block 241 is restricted, so as to avoid radial displacement that would cause the staple to be pushed out of place.

[0095] The inner side of the first pushing block 241 is provided with a push-out part 202 that cooperates with the anastomosis staple 220 for pushing the anastomosis staple. The shape of the push-out part 202 is adapted to the U-shaped structure of the anastomosis staple 220, and can fit tightly against the outer wall of the anastomosis staple 220 to ensure that it does not slip or deviate when the pushing force is applied, thereby achieving stable pushing of the anastomosis staple 220.

[0096] The two ends of the third elastic element 242 are respectively connected to the first pushing block 241 and the second semi-cylinder 210. In its natural state, the third elastic element 242 applies a spring force to the first pushing block 241, causing the first pushing block 241 to tend to move away from the center line of the second semi-cylinder 210. Thus, after the engagement is completed, it provides a spring force to the first pushing block 241, allowing it to return to its initial position. Specifically, the third elastic element is sleeved on the first guide rod 270. In this embodiment, the third elastic element 242 is a spring, specifically a tension spring; in other alternative embodiments, the third elastic element 242 can also be other elastic components capable of applying a spring force to the first pushing block 241, such as compression springs, rubber springs, etc.

[0097] The second pushing block 243 corresponds one-to-one with the first pushing block 241. The second pushing block 243 is located on the outside of the first pushing block 241 (on the side away from the inner sleeve 100). The second pushing block 243 is slidably connected to the second half-cylinder 210 along the axial direction, so that the second pushing block 243 can only move along the axial direction of the second half-cylinder 210. Specifically, a second guide rod 280 is fixedly installed axially inside the second half-cylinder 210. The second pushing block 243 has a guide hole adapted to the second guide rod 280. Through the cooperation of the guide hole and the second guide rod 280, the movement direction of the second pushing block 243 is restricted, ensuring stable axial movement.

[0098] The first pushing block 241 and the second pushing block 243 each have a first guide ramp 201 and a second guide ramp 203 on opposite sides. The inclination angles and lengths of the two guide ramps are matched (preferably with an inclination angle of 30°-60° to ensure efficient force transmission) and fit together. During operation, when the second pushing block 243 moves axially, the second guide ramp 203 exerts a compressive force on the first guide ramp 201 along the ramp direction. This compressive force can be decomposed into a radial component along the first pushing block 241, thereby driving the first pushing block 241 to overcome the elastic force of the third elastic element 242 and move radially inward, thus pushing the matching staple 220.

[0099] Preferably, all the second push blocks 243 are connected as a whole by connecting blocks to ensure that when the drive structure is activated, all the second push blocks 243 can move synchronously along the axial direction, thereby driving all the first push blocks 241 to move synchronously radially, realizing the simultaneous ejection of multiple rows and multiple sets of anastomotic staples 220, ensuring uniform force on the vascular anastomosis surface, and avoiding poor adhesion caused by local push delay.

[0100] The drive structure is disposed on the second half-cylinder 210. The drive structure is used to provide axial driving force to the second push block 243 to drive the second push block 243 to move.

[0101] Working principle: During operation, the second push block 243 is driven to move along the target direction through the drive structure. With the cooperation of the first guide slope 201 and the second guide slope 203, the second push block 243 drives the first push block 241 to move towards the axis of the second half cylinder 210.

[0102] The pushing mechanism provided in this embodiment, through the mutual engagement of the first guide slope 201 of the first pushing block 241 and the second guide slope 203 of the second pushing block 243, can precisely convert the axial movement (along the length of the blood vessel) of the second pushing block 243 into the radial movement (pointing towards the center of the blood vessel) of the first pushing block 241. This eliminates the need for additional complex transmission structures, resulting in high force transmission efficiency and preventing "force dispersion" that could lead to insufficient ejection of the anastomosis staple 220. Furthermore, axial travel adjustment is more intuitive than radial adjustment, allowing the physician to flexibly control the movement amplitude of the second pushing block 243, thereby controlling the radial ejection distance of the first pushing block 241. This ensures that the end of the anastomosis staple 220 just penetrates the blood vessel wall and bends against the inner collar 100, avoiding both excessive penetration that could damage the inner side of the blood vessel and insufficient penetration that could result in insecure fixation.

[0103] Furthermore, the anastomotic staples 220 in each set of receiving slots 212 are driven by a dedicated pusher block. This design ensures that all anastomotic staples 220 in the same set and anastomotic staples 220 in different sets are pushed out synchronously, avoiding uneven stress on the vessel wall, anastomotic gaps, or tears caused by local anastomotic staples 220 being pushed out too fast or too slow.

[0104] In addition, by applying a pre-tightening force "away from the center of the blood vessel" to the first pushing block 241 through the third elastic element 242, the first pushing block 241 is always in contact with the inclined surface of the second pushing block 243 when not in operation, avoiding "empty stroke during driving" due to gaps, which could lead to accidental puncture of blood vessels or tissues. It also prevents the first pushing block 241 from actively squeezing the anastomosis staple 220, avoiding premature dislodgement of the anastomosis staple 220 from the receiving groove 212 due to collisions during transportation or operation. At the same time, after the operation, when the driving structure is released, the third elastic element 242 can drive the first pushing block 241 to automatically return to its original position, facilitating the subsequent removal or repositioning of the outer ring 200 without the need to manually push the pushing block back.

[0105] like Figure 5 , Figure 6 , Figure 7 , Figure 10 , Figure 11 and Figure 12 As shown, in this embodiment, the drive structure includes a reel 244, a knob 245, and a pull rope 246.

[0106] The reel 244 is disposed inside the second half-cylinder 210 and rotatably connected to the second half-cylinder 210. The knob 245 is disposed outside the second half-cylinder 210 and rotatably connected to the second half-cylinder 210. The knob 245 is drively connected to the reel 244 to drive the reel 244 to rotate. The first end of the pull rope 246 is connected to the second push block 243, and the second end is connected to the reel 244.

[0107] During operation, the knob 245 is turned to drive the reel 244 to rotate, thereby winding the pull rope 246 through the reel 244, which in turn drives the second push block 243 to move through the pull rope 246.

[0108] It should be noted that two operating modes are supported during the operation. When there is sufficient operating space, the knob 245 can be rotated manually. When the operating space is limited, the knob can be rotated with the help of auxiliary tools.

[0109] Preferably, all the second push blocks 243 of the same collar assembly are fixedly connected to the connecting block 247, and the first end of the pull rope 246 is fixedly connected to the connecting block 247, so as to achieve the purpose of driving all the second push blocks 243 to move synchronously through one pull rope 246.

[0110] The drive structure provided in this embodiment, through the transmission logic of knob 245 rotation → rewinding wheel 244 → traction by rope 246, allows doctors to precisely control the movement of the second push block 243, thereby controlling the ejection depth of the anastomosis staple 220 and avoiding anastomosis failure due to loss of force / stroke control.

[0111] Furthermore, the rotation of knob 245 not only features "quantifiable stroke," but also allows doctors to precisely adjust the length of the winding rope 246 by controlling the rotation angle of knob 245 (e.g., 1 / 4 turn, 1 / 2 turn), thereby controlling the axial movement distance of the second push block 243. This design avoids the problem of "excessive force leading to overtravel" during "linear push," ensuring that the compression force of the first push block 241 on the anastomosis staple 220 is uniform. The end of the anastomosis staple 220 just penetrates the blood vessel wall and bends, avoiding both under-penetration (insecure fixation) and over-penetration (damage to the inner side of the blood vessel). It also features stable operation, thereby reducing operational errors.

[0112] The reel 244 is rotatably connected to the second half-cylinder 210. When winding the pull rope 246, it can convert the rotational force of the knob 245 into a uniform linear tension of the pull rope 246, avoiding sudden increases or decreases in tension. This smooth transmission allows the second push block 243 to move at a uniform speed along the axial direction, thereby driving the first push block 241 to uniformly compress the anastomosis staple 220, preventing the anastomosis staple 220 from "breaking" or "splashing out too quickly and scratching blood vessels" due to sudden changes in force, thus ensuring the stability of the anastomosis process.

[0113] like Figure 3 As shown, in this embodiment, a guide groove 112 is correspondingly formed on the outer wall of the inner sleeve 100. The depth of the guide groove 112 is slightly greater than the thickness of the anastomosis staple 220, so that the two ends of the anastomosis staple 220 can be accommodated in the guide groove after bending, thereby preventing the bent anastomosis staple 220 from puncturing blood vessels and affecting the quality of anastomosis. Guide surfaces are correspondingly provided at both ends of the guide groove to guide the bending of the two ends of the anastomosis staple 220, thereby facilitating the bending of the anastomosis staple 220 into a B-shape. Specifically, the guide surface can be an arc surface or an inclined surface.

[0114] It should be noted that the first half-cylinder 110 and the second half-cylinder 210 are respectively provided with mutually cooperating positioning protrusions 114 and positioning grooves 214. The inner and outer rings are positioned by the cooperation of the positioning protrusions and positioning grooves, so that the matching pins 220 correspond to the guide grooves 112.

[0115] like Figure 5 and Figure 12 As shown, the collar assembly also includes a cutting blade 250.

[0116] The cutting blade 250 corresponds one-to-one with the first pushing block 241, and the cutting blade 250 is arc-shaped. The cutting blade 250 is located inside the first pushing block 241 and is fixedly connected to it. The opposite ends of any two adjacent cutting blades 250 overlap, thus forming a ring with all the cutting blades 250, achieving complete cutting of the blood vessel. In its natural state, the cutting blade 250 is stored within the second semi-cylinder 210.

[0117] During the anastomosis process, as the first push block 241 moves, the cutting blade 250 extends from the second half-cylinder 210. Under the action of the cutting blade 250, the excess part of the blood vessel is cut off, realizing the one-step completion of "anastomosis staple 220 push-out" and "excess tissue cutting", completely eliminating the redundant steps of "anastomosis first, then cutting with different tools" in traditional surgery.

[0118] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A large blood vessel anastomosis device, characterized in that, include: The inner ring is hollow and open at both ends. The inner ring includes two first semi-cylindrical bodies with semi-circular cross-sections. The two first semi-cylindrical bodies are interlocked and the first sides of the two first semi-cylindrical bodies are hinged to each other, and the second sides can move closer to or further away from each other around their own hinge center line. An outer ring, hollow and open at both ends, the outer ring comprising two collar assemblies with semi-circular cross-sections, the collar assembly comprising: The second half-cylinder has a semi-circular cross-section. The first side of the second half-cylinder of the two collar assemblies is hinged, and the second side can move closer or further away from each other around its own hinge center line. Multiple sets of receiving grooves are provided on the inner side of the second half-cylinder. The multiple sets of receiving grooves are arranged sequentially and spaced apart along the center line of the second half-cylinder. Each set of receiving grooves is provided with multiple receiving grooves. The multiple receiving grooves in each set of receiving grooves are evenly arranged around the center line of the second half-cylinder. The multiple receiving grooves of any two adjacent sets of receiving grooves are staggered. In the same radial plane, the projections of the receiving grooves of the first set of receiving grooves and the receiving grooves of the second set of receiving grooves overlap. A U-shaped staple is provided in the receiving groove. In its natural state, the staple can be held in the receiving groove. When the radial thrust on the staple exceeds a preset value, the staple can move radially along the second half-cylinder. as well as A pushing mechanism, which is disposed on the second half-cylinder, is used to apply force to the anastomosis staple to push the staple out of the receiving groove, thereby causing the staple to penetrate the blood vessel wall outside the inner sleeve and form a bend for fixation.

2. The large blood vessel anastomosis device according to claim 1, characterized in that, The inner sleeve also includes a first elastic element, which is disposed at the hinge center of the two first half-cylinders. The two ends of the first elastic element abut against the two first half-cylinders respectively. In its natural state, the first elastic element applies elastic force to the two first half-cylinders so that the second sides of the two first half-cylinders always maintain a tendency to move towards each other.

3. The large blood vessel anastomosis device according to claim 1, characterized in that, A first operating handle is provided on the first side of the first half-cylinder.

4. The large blood vessel anastomosis device according to any one of claims 1-3, characterized in that, The propulsion mechanism includes: The first pushing block is radially slidably connected to the second half-cylinder, so that the first pushing block can only move radially along the second half-cylinder; The third elastic element has its two ends connected to the first pushing block and the second half-cylinder respectively. In its natural state, the third elastic element applies elastic force to the first pushing block so that the first pushing block has a tendency to move away from the center line of the second half-cylinder. The second pushing block corresponds one-to-one with the first pushing block. The second pushing block is disposed outside the first pushing block. The second pushing block is slidably connected to the second half-cylinder along the axial direction so that the second pushing block can only move along the axial direction of the second half-cylinder. The first push block and the second push block are provided with a first guide slope and a second guide slope that cooperate with each other on opposite sides. During operation, the axial movement of the second push block is converted into the radial movement of the first push block through the cooperation of the first guide slope and the second guide slope. A drive structure is disposed on the second half-cylinder, the drive structure being used to drive the second push block to move.

5. The large blood vessel anastomosis device according to claim 4, characterized in that, The driving structure includes: A reel is disposed inside the second half-cylinder and is rotatably connected to the second half-cylinder; A knob, disposed outside the second half-cylinder and rotatably connected to it, is drively connected to the reel to drive the reel to rotate; and The pull rope has its first end connected to the second push block and its second end connected to the reel.

6. The large blood vessel anastomosis device according to claim 1, 2, 3 or 5, characterized in that, The outer ring also includes a second elastic element, which is disposed at the hinge center of the two second half-cylinders. The two ends of the second elastic element are respectively hinged to the two second half-cylinders. In its natural state, the second elastic element applies elastic force to the two second half-cylinders so that the second sides of the two second half-cylinders always maintain a tendency to move towards each other.

7. The large blood vessel anastomosis device according to claim 6, characterized in that, A second operating handle is provided on the first side of the second half-cylinder.

8. The large blood vessel anastomosis device according to claim 6, characterized in that, The outer wall of the inner sleeve is provided with a guide groove, the depth of which is greater than the thickness of the staple, and the two ends of the guide groove are provided with guide surfaces.

9. The large blood vessel anastomosis device according to claim 4, characterized in that, The outer ring also includes a cutting blade, which corresponds one-to-one with the first pushing block. The cutting blade is arc-shaped and is disposed on the inner side of the first pushing block. The cutting blade is fixedly connected to the first pushing block, and the opposite ends of any two adjacent cutting blades overlap each other.

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