Vascular anastomosis assisting device

Abstract

The present application relates to the technical field of medical devices, and more particularly to a blood vessel anastomosis auxiliary device, comprising: a holding handle, which is in a pen-shaped structure; an operating knob, which is arranged on the holding handle; a hollow push tube, which is movably arranged inside the holding handle along the axial direction of the holding handle, the proximal end of the hollow push tube is sealingly connected with a negative pressure source, and the distal end opening faces the distal end of the holding handle; a flexible suction head, which is arranged at the distal end of the holding handle, and is connected between the distal end of the hollow push tube and the distal end structure of the holding handle; the hollow push tube is in transmission connection with the operating knob, and the operating knob can drive the hollow push tube to move along the axial direction of the holding handle, so that the flexible suction head is deformed, the blood vessel end portion adsorbed on the flexible suction head is everted, and the installation of a blood vessel anastomosis ring is facilitated. The present application is used to simplify the installation process of an anastomat, and improve the anastomosis efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a vascular anastomosis auxiliary device. Background Technology

[0002] Microvascular anastomosis is a crucial step in restoring blood circulation and ensuring the success of tissue or organ transplantation. Currently, the mainstream microvascular anastomosis techniques in clinical practice mainly include manual suturing and microvascular anastomosis devices (such as the Synovis anastomosis device).

[0003] Manual suturing involves interrupted suturing of the severed ends of blood vessels under a microscope using extremely fine sutures (such as 8-0 nylon sutures). It is suitable for various types of blood vessels, including arteries and veins, and is particularly well-suited for arteries with thick walls and complex structures, as well as veins with thin walls. The advantage of this method lies in its flexibility, allowing for anastomosis under different vessel diameters and complex anatomical conditions. However, its significant disadvantages include extremely high skill requirements for the surgeon, necessitating precise alignment of the vessel wall to avoid misalignment or uneven tension; the procedure is also time-consuming (studies show an average time of 25 minutes and 9 seconds), prolonging tissue ischemia time and increasing the risk of postoperative complications; furthermore, improper tension control during suturing can easily cause damage to the vascular intima, potentially inducing thrombosis and affecting the anastomosis outcome.

[0004] To improve efficiency and lower the technical barrier, microvascular anastomosis devices have emerged. Traditional devices consist of a pair of ring-shaped structures with stainless steel needles, achieving rapid connection by everting the severed vessel end and placing it onto the ring needles. They offer advantages in venous anastomosis: short operation time (average about 5 minutes), low thrombosis rate (approximately 1.7% for veins), high flap survival rate (up to 99%), and less reliance on the surgeon's microsurgical skills. However, due to the thick wall of arteries, rich in smooth muscle layers, and high elasticity, they are difficult to evert naturally and securely attach to the ring needles, severely limiting the application of traditional anastomosis devices in arterial anastomosis. In clinical practice, manual assistance using tools such as forceps is often required to attach the arterial wall into the ring needles. This process is not only cumbersome and time-consuming but also prone to needle bending or even breakage, increasing the risk of surgical failure.

[0005] Current microvascular anastomosis techniques face challenges in arterial settings, including time-consuming manual suturing and difficulties in attaching the anastomosis device to the needle. Particularly when using an anastomosis device for arterial anastomosis, efficiently and safely achieving eversion of the vessel end and fixation with the ring needle has become a bottleneck restricting the technology. Summary of the Invention

[0006] This invention provides a vascular anastomosis auxiliary device to solve the defects in the prior art when using a microvascular anastomosis device for arterial anastomosis. Due to the thick and elastic nature of the arterial wall, it is difficult to effectively evert and hang it on the anastomosis ring needle, resulting in cumbersome operation, time-consuming operation, and easy damage to instruments or blood vessels. The invention achieves rapid, stable, and controllable eversion of the ends of thick-walled blood vessels such as arteries, thereby simplifying the anastomosis device installation process and improving anastomosis efficiency and safety.

[0007] This invention provides a vascular anastomosis assistive device, comprising: a grip handle, the grip handle having a pen-shaped structure; an operating button disposed on the grip handle; a hollow push tube movably disposed inside the grip handle along the axial direction, the proximal end of the hollow push tube being sealed and connected to a negative pressure source, and the distal end opening facing the distal end of the grip handle; a flexible suction head disposed at the distal end of the grip handle, the flexible suction head being connected between the distal end of the hollow push tube and the distal structure of the grip handle; the hollow push tube being tractively connected to the operating button, the operating button being able to drive the hollow push tube to move along the axial direction of the grip handle, so as to deform the flexible suction head, turning the end of the blood vessel adsorbed on the flexible suction head outward, facilitating the installation of the vascular anastomosis ring.

[0008] According to one embodiment of the present invention, the flexible adsorption head is made of medical-grade silicone material and is used to contact the inner wall of blood vessels.

[0009] According to one embodiment of the present invention, the flexible adsorption head is mushroom-shaped, with its distal outer diameter being smaller than its proximal outer diameter, for inserting the distal end into the blood vessel and tightly attaching the end of the blood vessel to the proximal end of the flexible adsorption head, and the proximal portion with a larger outer diameter can block the blood vessel.

[0010] According to one embodiment of the present invention, the flexible adsorption head has an inner cavity; the thickness of the inner wall of the inner cavity decreases in a stepped manner along the axial direction, which, in conjunction with the mushroom-shaped shape, allows the flexible adsorption head to undergo a specific deformation under the pull of the hollow push tube; wherein, when the smaller inner diameter portion of the flexible adsorption head is concave inward, it pushes the larger inner diameter portion to extend outward and turn outward, thereby causing the closely attached blood vessel end to turn outward.

[0011] According to one embodiment of the present invention, the outer surface of the flexible adsorption head is provided with scale lines for measuring the diameter of blood vessels to assist in the selection of a suitable vascular anastomosis ring.

[0012] According to one embodiment of the present invention, the flexible adsorption head is made of a transparent material so that when the vascular anastomosis assist device together with the vascular end is pressed against the stainless steel needle of the vascular anastomosis ring, it is possible to visually observe whether the stainless steel needle has passed through the vascular end.

[0013] According to one embodiment of the present invention, the negative pressure source is a rubber balloon, which is disposed at the proximal end of the grip handle; the proximal end of the hollow push tube extends into the interior of the rubber balloon and is sealed to the rubber balloon.

[0014] According to one embodiment of the present invention, the outer wall of the hollow push tube is provided with a first rack; the operating button is driven and engaged with the first rack through a gear structure.

[0015] According to one embodiment of the present invention, the gear structure includes a large gear portion and a small gear portion; the large gear portion is in drive engagement with the operating button; and the small gear portion is in drive engagement with the first rack of the hollow push tube.

[0016] According to one embodiment of the present invention, the operating button is a push button, the push button is provided with a second rack, the second rack meshing with the large gear part; or, the operating button is a rotary knob, the rotary knob directly driving the large gear part to rotate.

[0017] The vascular anastomosis auxiliary device provided by this invention features a pen-shaped handle with a hollow push tube movably disposed axially within it, connected to a negative pressure source. A flexible suction head is connected between the distal end of the hollow push tube and the distal end of the handle, allowing it to adsorb the severed end of a blood vessel under negative pressure. An operating button is connected to the hollow push tube; when the operating button is triggered, it drives the hollow push tube to retract axially, causing the flexible suction head to undergo controllable deformation under tension, thereby uniformly everting the adsorbed end of the blood vessel. This structure automatically completes the eversion of the blood vessel without the need for additional tools such as forceps, making it suitable for thick-walled, highly elastic arteries. It solves the technical problem of difficulty in attaching needles in existing anastomotic devices for arterial applications, improving the convenience, reliability, and universality of microvascular anastomosis. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is one of the overall structural schematic diagrams of the vascular anastomosis auxiliary device provided by the present invention.

[0020] Figure 2 This is the second schematic diagram of the overall structure of the vascular anastomosis auxiliary device provided by the present invention.

[0021] Figure 3 This is a partially enlarged schematic diagram of the flexible adsorption head provided by the present invention in its undeformed state.

[0022] Figure 4 This is a magnified schematic diagram of the flexible adsorption head provided by the present invention after deformation under force.

[0023] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the flexible adsorption head provided by the present invention, showing its stepped inner cavity wall thickness design.

[0024] Figure 6 This is a schematic diagram of the appearance of the flexible adsorption head made of transparent material provided by the present invention.

[0025] Figure 7 This is a schematic diagram of a flexible adsorption head with scale lines on the outer surface provided by the present invention, used for measuring blood vessel diameter.

[0026] Figure 8 This is a schematic diagram of the vascular anastomosis auxiliary device provided by the present invention in the initial stage of needle insertion operation.

[0027] Figure 9 This is a schematic diagram of the process of inserting a flexible adsorption head into the end of a blood vessel, as provided by the present invention.

[0028] Figure 10 This is a schematic diagram of the flexible adsorption head provided by the present invention being fully inserted into and sealing the end of a blood vessel.

[0029] Figure 11 This is a schematic diagram of the operation provided by the present invention, which uses negative pressure to adsorb blood vessels and pulls the hollow push tube to achieve blood vessel eversion.

[0030] Figure 12 This is a schematic diagram of the process provided by the present invention, in which the blood vessel is everted and then punctured with a stainless steel needle through an anastomotic ring to complete the needle hanging.

[0031] Figure 13 This is a schematic diagram of the gear structure of the vascular anastomosis auxiliary device provided by the present invention.

[0032] Figure label: 10. Handle grip; 11. Control button; 12. Hollow push tube; 13. Flexible suction head; 14. Scale lines; 15. Rubber balloon; 16. First rack; 17. Large gear section; 18. Small gear section. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034] The specific terms used in this specification are for illustrative purposes only and are not intended to limit the illustrated embodiments. For example, expressions such as "same" and "identical" not only indicate a strictly identical state, but also indicate a state with tolerances or differences in the degree of functionality. For example, expressions indicating relative or absolute arrangement such as "in a certain direction," "along a certain direction," "side by side," "perpendicular," "centered on," "concentric," or "coaxial" not only strictly indicate such an arrangement, but also indicate a state of relative displacement by tolerances or angles or distances with the same degree of functionality.

[0035] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limiting the present invention.

[0036] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "multiple" means two or more. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified. In the description of the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, B1 and / or B2 can represent: B1 existing alone, B1 and B2 existing simultaneously, and B2 existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Microvascular anastomosis, performed under the aid of a surgical microscope, involves the precise connection of tiny blood vessels (including arteries and veins), typically ranging from sub-millimeter to several millimeters in diameter, to restore tissue blood perfusion. Its goal is to achieve precise alignment of the vascular intima, avoiding damage to the vessel wall or luminal stenosis, thereby effectively preventing complications such as thrombosis and ensuring the survival of transplanted tissue. The microvascular anastomosis procedure involves several highly precise steps, including vessel dissection, cutting, end trimming, alignment, and connection.

[0039] This technology is widely used in various free tissue transplant surgeries. It involves harvesting and transferring the patient's own healthy tissue (such as skin flaps or myocutaneous flaps) from the donor site to the recipient site to repair tissue defects caused by tumor resection, trauma, or congenital malformations, or to reconstruct organ function. Typical clinical scenarios include: breast reconstruction after breast cancer surgery, structural and functional repair after head and neck tumor resection, and reconstruction of complex tissue defects after severe limb trauma. In recent years, with advancements in microsurgical techniques, donor site selection has become more flexible (e.g., flap design based on perforator artery anatomy), and intraoperative blood flow assessment methods have become increasingly precise (e.g., real-time monitoring of perfusion status using laser Doppler or fluorescence angiography). However, the efficiency and safety of microvascular anastomosis itself remain key bottlenecks limiting overall surgical outcomes, especially in arterial anastomosis.

[0040] This invention addresses the aforementioned clinical challenges by proposing a vascular anastomosis assistance device. Preferably, the device features a distal suction head made of flexible medical-grade silicone material, possessing excellent biocompatibility. This head gently conforms to the vascular wall, evenly distributing force under negative pressure suction, significantly reducing mechanical damage to the vascular intima and thus lowering the risk of postoperative thrombosis. Simultaneously, this flexible structure provides excellent support for the stainless steel needle of the anastomosis device after the vessel is everted, preventing needle bending or breakage due to excessive resistance during needle attachment. More importantly, this device, through mechanical linkage and negative pressure synergy, can automatically and controllably perform eversion of thick-walled arterial stumps, effectively simplifying the process of connecting the artery to the anastomosis ring needle and overcoming the technical barriers of existing anastomosis devices in arterial applications. Furthermore, the device can integrate vessel diameter measurement functionality, providing the surgeon with objective data for selecting a matching anastomosis ring size, further improving surgical accuracy and success rate. In summary, this invention can not only significantly shorten anastomosis time and improve operational efficiency, but also reduce the reliance on the surgeon's microsurgical experience, providing a safe, reliable and easily promoted auxiliary solution for arterial microvascular anastomosis.

[0041] The following is combined with Figures 1 to 13 Specific embodiments of the vascular anastomosis assist device of the present invention are described.

[0042] like Figure 1 and Figure 2As shown, the present invention provides a vascular anastomosis assistive device, comprising: a grip handle 10, the grip handle 10 having a pen-shaped structure; an operation button 11 disposed on the grip handle 10; a hollow push tube 12 movably disposed inside the grip handle 10 along the axial direction, the proximal end of the hollow push tube 12 being sealed to a negative pressure source, and the distal end opening facing the distal end of the grip handle 10; a flexible suction head 13 disposed at the distal end of the grip handle 10, the flexible suction head 13 being connected between the distal end of the hollow push tube 12 and the distal structure of the grip handle 10; the hollow push tube 12 being drively connected to the operation button 11, the operation button 11 being able to drive the hollow push tube 12 to move along the axial direction of the grip handle 10, so that the flexible suction head 13 deforms, turning the end of the blood vessel adsorbed on the flexible suction head 13 outward, facilitating the installation of the vascular anastomosis ring. The negative pressure provided by the negative pressure source allows the blood vessel wall to adhere tightly to the flexible suction head 13 at the distal end, facilitating needle insertion and preventing the blood vessel flap from slipping off.

[0043] Specifically, the vascular anastomosis assistive device provided by this invention integrates negative pressure adsorption and mechanical deformation control to achieve stable grasping and controllable eversion of tiny vascular rupture ends. The main body of the device adopts a pen-shaped grip handle 10, which facilitates precise operation by the surgeon under a microscope in a manner similar to holding a pen. The operating button 11 on the handle is connected to the internal hollow push tube 12. When the operating button 11 is pressed or slid, it can drive the hollow push tube 12 to retract proximally along the handle axis. The distal end of the hollow push tube 12 is connected to a flexible adsorption head 13, which is fixed to the opening of the thin tube section at the distal end of the handle. The flexible adsorption head 13 is preferably made of soft, biocompatible, and elastic materials such as medical-grade silicone. When the hollow push tube 12 retracts under the action of the operating button 11, it pulls the flexible adsorption head 13 to produce axial compression or radial expansion deformation, thereby causing the vascular rupture end adsorbed on its surface to be everted outward. At the same time, the proximal end of the hollow push tube 12 is sealed to the external negative pressure source. Before use, the negative pressure is turned on so that the distal end of the flexible adsorption head 13 forms a local negative pressure cavity, adsorbing the broken end of the blood vessel onto its surface to prevent displacement or slippage during operation.

[0044] In practical applications, the aforementioned vascular anastomosis assist device is mainly used in conjunction with existing microvascular anastomosing devices to complete rapid anastomosis of arteries or veins, especially suitable for thick-walled, highly elastic arteries that are difficult to manually evert. During the operation, the surgeon first gently contacts the distal end of the device with the freed and severed vessel end. Under negative pressure, the inner wall of the vessel is stably adsorbed onto the flexible adsorption head 13. Then, the operating button 11 is triggered, driving the hollow push tube 12 to retract, and the flexible adsorption head 13 deforms accordingly, evenly and symmetrically everting the vessel end. At this time, the everted edge of the vessel is clearly exposed and the tension is moderate, making it easy to accurately insert or hang the stainless steel needle of the anastomosis ring. This process does not require repeated clamping and adjustment with forceps, avoiding needle bending, vessel tearing, or intimal damage caused by improper force during traditional manual needle hanging. In scenarios requiring high-quality arterial anastomosis, such as breast reconstruction, head and neck repair, or limb composite tissue transplantation, this device can effectively improve anastomosis efficiency and success rate, reduce tissue ischemia time, and improve patient prognosis.

[0045] According to a vascular anastomosis assist device of the present invention, the flexible suction head 13 can be an annular, cup-shaped, or trumpet-shaped elastic hollow structure, preferably made of medical-grade silicone material, for contact with the inner wall of the blood vessel. The flexible suction head 13 made of medical-grade silicone material can evenly distribute pressure to reduce intimal damage and lower the risk of thrombosis, while facilitating the insertion of stainless steel needles and preventing needle bending and deformation. Specifically, the flexible suction head 13 is preferably designed as a thin-walled structure with moderate elasticity and good resilience. When the severed end of the blood vessel is fitted or attached to the outer surface of the flexible suction head 13, negative pressure through the hollow push tube 12 makes the blood vessel wall fit tightly against its contour, achieving a clamp-free and clamp-free fixation method. Because medical-grade silicone is soft and has a smooth surface, it does not generate local stress concentration when in contact with the vascular intima, effectively avoiding mechanical endothelial abrasion or micro-tears caused by traditional metal instrument clamping, thereby significantly reducing the risk of postoperative thrombosis. Simultaneously, when the operating button 11 drives the hollow push tube 12 to retract axially, the flexible suction head 13 undergoes controllable deformation due to tension (such as axial shortening and radial expansion), causing the already adsorbed blood vessel end to simultaneously evert, forming a regular everted edge with moderate tension. In this state, the blood vessel wall is stably stretched and maintains an open shape. The silicone material has moderate resistance, guiding the needle tip to accurately penetrate without slipping; on the other hand, its elastic buffering properties can absorb the puncture impact, preventing the needle body from bending or breaking due to hard resistance. Therefore, this flexible suction head 13 not only improves the safety and stability of blood vessel processing, but also significantly optimizes the cooperation efficiency with existing anastomotic devices.

[0046] Furthermore, according to a vascular anastomosis assist device of the present invention, the flexible adsorption head 13 is mushroom-shaped, with its distal outer diameter smaller than its proximal outer diameter. This allows the distal end to be inserted into the blood vessel and the vessel end to be tightly abutted against the proximal end of the flexible adsorption head 13, while the larger proximal end can seal the blood vessel. This mushroom-shaped structure combines the dual functions of intravascular insertion and external sealing. During operation, the narrow distal end of the flexible adsorption head 13 can be easily inserted into the severed blood vessel lumen, while its thicker proximal end naturally abuts against the edge of the blood vessel break, forming an annular contact surface. When negative pressure is introduced through the hollow push tube 12, the blood vessel wall is adsorbed and tightly wrapped around the proximal periphery, while the larger proximal outer diameter effectively seals the blood vessel opening, ensuring adsorption stability.

[0047] Furthermore, according to a vascular anastomosis assist device of the present invention, the flexible suction head 13 has an inner cavity; the thickness of the inner wall of the cavity decreases in a stepped manner along the axial direction, and combined with the mushroom-shaped shape, the flexible suction head 13 can undergo specific deformation under the pull of the hollow push tube 12; wherein, when the smaller inner diameter portion of the flexible suction head 13 is concave inward, it pushes the larger inner diameter portion to extend outward and turn outward, causing the closely attached blood vessel end to turn outward. When the hollow push tube 12 is retracted proximally under the drive of the operating button 11, it pulls the bottom of the flexible suction head 13 (i.e., the area with a smaller inner diameter and thicker wall), causing it to tend to contract or concave inward. Due to the continuity of the material and geometric constraints, this local deformation is transmitted to the proximal area with a larger outer diameter and thinner wall, causing it to expand radially outward and turn over. This process not only simultaneously causes the already suctioned blood vessel end to complete a uniform and symmetrical outward turning, but also avoids local tearing or asymmetrical turning caused by traditional forceps clamping, significantly improving the quality of the outward turning.

[0048] Furthermore, according to a vascular anastomosis assist device of the present invention, the outer surface of the flexible suction head 13 is provided with graduation lines 14 for measuring the diameter of the blood vessel to assist in selecting a suitable vascular anastomosis ring. Specifically, these graduation lines 14 are typically marked in millimeters along the circumferential or axial direction of the proximal outer periphery of the flexible suction head 13. After the surgeon places the blood vessel into the suction head, the corresponding graduation position at the edge of the blood vessel can be directly observed under a microscope to quickly determine the outer diameter of the blood vessel. For example, if the blood vessel exactly covers the graduation line 14 marked "2.0 mm", it indicates that an anastomosis ring assembly matching that diameter should be selected. This integrated measurement function eliminates the need for additional steps of using a diameter gauge or visual estimation, improving the efficiency and accuracy of intraoperative decision-making.

[0049] Furthermore, according to a vascular anastomosis assistive device of the present invention, the flexible suction head 13 is made of a transparent material, so that when the vascular anastomosis assistive device, together with the end of the blood vessel, is pressed against the stainless steel needle of the vascular anastomosis ring, it is possible to visually observe whether the stainless steel needle has penetrated the end of the blood vessel. Transparent medical silicone or polyurethane materials not only possess good flexibility and biocompatibility, but also allow light to pass through, enabling the operator to clearly see the blood vessel wall, the internal structure of the suction head, and the relative position of the stainless steel needle under a microscope. During needle placement, when the needle tip of the anastomosis ring approaches or pierces the everted edge of the blood vessel, the operator can use the transparent suction head to confirm in real time whether the needle tip has accurately penetrated the entire thickness of the blood vessel, and whether there has been any deviation or slippage, thereby avoiding tissue damage or needle deformation caused by repeated punctures. This visual feedback mechanism improves the safety and success rate of the operation.

[0050] According to a vascular anastomosis assist device of the present invention, the negative pressure source is a rubber balloon 15, which is disposed at the proximal end of the handle 10; the proximal end of the hollow push tube 12 extends into the interior of the rubber balloon 15 and is sealed to the rubber balloon 15. Specifically, the rubber balloon 15 is preferably made of medical-grade elastic silicone or latex, which has good resilience and airtightness. Before use, the operator manually squeezes the rubber balloon 15 to expel the internal air. After release, the balloon retracts due to its own elasticity, forming a negative pressure environment. Since the proximal end of the hollow push tube 12 is directly connected to the interior of the rubber balloon 15 and is well sealed, the negative pressure can be quickly transmitted to the distal end of the flexible suction head 13, thereby generating a stable suction force to firmly adsorb the severed vascular ends and adhere them to their outer surface.

[0051] This structure eliminates the need for complex external electric negative pressure pumps or syringes, making the entire device compact and easy to operate. Simultaneously, the negative pressure intensity of the rubber balloon 15 can be finely adjusted by the degree of compression—mild compression generates a gentle suction force, suitable for thin-walled veins; full compression provides stronger negative pressure for fixing more elastic arteries. Furthermore, the integrated sealed connection between the balloon and the hollow push tube 12 avoids the risk of tubing detachment or leakage, ensuring continuous and stable negative pressure during critical procedures. After completing vascular eversion and needle insertion, the operator can squeeze the balloon again to release the negative pressure, easily releasing the suction and achieving non-invasive vascular release.

[0052] like Figure 13As shown, according to a vascular anastomosis auxiliary device of the present invention, the outer wall of the hollow push tube 12 is provided with a first rack 16; the operating button 11 is driven and engaged with the first rack 16 through a gear structure. Specifically, this embodiment converts the rotation or linear motion of the operating button 11 into a precise axial displacement of the hollow push tube 12. The first rack 16 extends axially along the outer wall of the hollow push tube 12 and meshes with the internal gear structure. When the operating button 11 is triggered, the first rack 16 is moved through gear transmission, thereby driving the hollow push tube 12 to slide stably within the grip handle 10. Compared with the direct push-pull structure, the rack and pinion transmission method has higher positioning accuracy and operational stability, which can effectively prevent sudden advances or rebounds caused by hand tremors or uneven force, ensuring that the deformation process of the flexible suction head 13 is smooth and controllable, and achieving uniform and symmetrical eversion of the blood vessel end.

[0053] Furthermore, according to a vascular anastomosis assist device of the present invention, the gear structure includes a large gear section 17 and a small gear section 18; the large gear section 17 is driven by the operating button 11; the small gear section 18 is driven by the first rack 16 of the hollow push tube 12. The use of a large-diameter gear and a small-diameter gear reduces the range of thumb movement, facilitating more precise operation. This double gear (i.e., the coaxial large gear and small gear) constitutes a single-stage reduction transmission mechanism. When the operating button 11 drives the large gear section 17 to rotate one revolution, because the diameter of the large gear is larger than that of the small gear, the small gear only rotates a small stroke, thereby causing the first rack 16 to produce a small but precise axial displacement. The mechanical reduction ratio amplifies the operating torque and reduces the output stroke, allowing the operator to achieve precise adjustment of the hollow push tube 12 with only a small thumb movement.

[0054] Furthermore, according to a vascular anastomosis assist device of the present invention, the operating button 11 can be a push button, which has a second rack that meshes with the large gear part 17; or, the operating button 11 can also be a knob, which directly drives the large gear part 17 to rotate. The push button or knob is preferably located in the lower middle part of the grip handle 10 for easy thumb operation. When using the push button, the surgeon pushes the button along the handle axis, and its built-in second rack drives the large gear to rotate, which in turn drives the hollow push tube 12 to retract via the small gear. The knob, on the other hand, drives the large gear through rotation, making it more suitable for delicate operations requiring continuous fine-tuning of the eversion degree. Regardless of the form, the operating button 11 is preferably located in the lower middle part of the grip handle 10, i.e., where the surgeon's thumb naturally rests, allowing all actions such as suction, eversion, and release to be completed without changing the grip posture.

[0055] According to a preferred embodiment of the present invention, a novel vascular anastomosis auxiliary device is proposed to address the problems of complex operation, high risk of vascular injury, uneven eversion, and insufficient visualization in the prior art.

[0056] like Figure 1and Figure 2 As shown, the device mainly consists of a grip handle 10, an operating button 11 (which can be a push button or a rotary button), a hollow push tube 12, a flexible suction head 13 at the distal end, and a rubber balloon 15 located at the proximal end of the grip handle 10. The flexible suction head 13 is preferably made of medical-grade silicone material and has a mushroom-shaped structure. Its distal outer diameter is smaller than its proximal outer diameter, facilitating insertion into the blood vessel lumen, while the larger proximal outer diameter effectively seals the blood vessel rupture.

[0057] like Figures 3 to 7 The image shown is a partially enlarged schematic diagram of the flexible adsorption head 13: Figure 3 This is the state before deformation. Figure 4 This is the deformed state. Figure 5 Its internal cross-sectional structure Figure 6 Showing the suction head made of transparent material. Figure 7 The image shows an adsorption head with graduations 14. This flexible adsorption head 13 has a hollow structure with its inner wall thickness decreasing in a stepped manner along the axial direction. It communicates with the hollow push tube 12 to form a closed negative pressure channel. This structure, combined with its mushroom-shaped shape, causes the distal region with a smaller inner diameter to indent inward when the hollow push tube 12 is pulled, thereby pushing the thinner proximal region outward and everting, simultaneously causing the end of the blood vessel closely attached to its surface to complete a uniform eversion. Furthermore, the flexible adsorption head 13 can be made of transparent medical-grade silicone material, facilitating direct intraoperative observation of whether the stainless steel needle accurately penetrates the blood vessel wall; its outer surface can also have millimeter-level graduations 14 for quickly measuring the outer diameter of the blood vessel and assisting in the selection of a matching vascular anastomosis ring.

[0058] like Figures 8 to 12 The diagram shown illustrates the operation flow of the auxiliary needle attachment device: like Figure 8 As shown, the blood vessel is first temporarily blocked using a vascular closure clamp, and the severed end of the blood vessel is then passed through the central hole of the vascular anastomosis ring. like Figure 9 As shown, the distal end of the flexible adsorption head 13 of this device is inserted into the lumen of the severed blood vessel. like Figure 10 As shown, continue pushing until the proximal bulge of the flexible adsorption head 13 completely contacts and blocks the blood vessel break. like Figure 11 As shown, the rubber balloon 15 located near the handle 10 is manually squeezed to expel the internal air. After being released, the balloon rebounds to create negative pressure, which firmly attaches the end of the blood vessel to the outer surface of the proximal end of the flexible suction head 13 through the hollow push tube 12. Subsequently, the push button (which has a second rack and meshes with the large gear 17) or the knob (which directly drives the large gear 17 to rotate) is operated. The hollow push tube 12 is driven to retract axially through the gear reduction mechanism, causing the flexible suction head 13 to undergo controllable deformation, thereby causing the end of the blood vessel to flip outward synchronously. like Figure 12 As shown, after eversion is completed, the entire device, along with the everted end of the blood vessel, is pushed toward the stainless steel needle on the anastomosis ring. Using the transparent properties of the flexible suction head 13, the needle tip is observed in real time to see if it accurately penetrates the entire thickness of the blood vessel. After confirming that the puncture is in place, the device is removed, and the everted edge of the blood vessel is completely pressed to the needle root with micro forceps. The above operation is repeated on the other side of the blood vessel. Finally, the two anastomosis rings are docked and locked to complete the vascular anastomosis.

[0059] This solution integrates negative pressure adsorption, mechanical eversion, visual observation, and dimensional measurement functions, improving the accuracy, safety, and operational efficiency of vascular anastomosis. It is particularly suitable for small-diameter vascular reconstruction surgery in microsurgery.

[0060] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vascular anastomosis assist device, characterized in that, include: A grip handle (10) is provided, the grip handle (10) having a pen-shaped structure; An operation button (11) is provided on the grip handle (10); A hollow push tube (12) is movably disposed inside the grip handle (10) along the axial direction of the grip handle (10). The proximal end of the hollow push tube (12) is sealed to the negative pressure source, and the distal end opening faces the distal end of the grip handle (10). A flexible adsorption head (13) is disposed at the distal end of the grip handle (10), and the flexible adsorption head (13) is connected between the distal end of the hollow push tube (12) and the distal structure of the grip handle (10). The hollow push tube (12) is connected to the operating button (11) for transmission. The operating button (11) can drive the hollow push tube (12) to move along the axial direction of the grip handle (10) so that the flexible adsorption head (13) deforms and the blood vessel end adsorbed on the flexible adsorption head (13) is turned outward, which facilitates the installation of the vascular anastomosis ring.

2. The vascular anastomosis assist device according to claim 1, characterized in that, The flexible adsorption head (13) is made of medical silicone material and is used to contact the inner wall of blood vessels.

3. The vascular anastomosis assist device according to claim 1, characterized in that, The flexible adsorption head (13) is mushroom-shaped, with its distal outer diameter being smaller than its proximal outer diameter. It is used to insert the distal end into the blood vessel and to tightly attach the end of the blood vessel to the proximal end of the flexible adsorption head (13). The proximal part with a larger outer diameter can block the blood vessel.

4. The vascular anastomosis assist device according to claim 3, characterized in that, The flexible adsorption head (13) has an inner cavity; The thickness of the inner wall of the cavity decreases in a stepped manner along the axial direction. Combined with the mushroom-shaped shape, the flexible adsorption head (13) can undergo specific deformation under the pull of the hollow push tube (12). When the smaller inner diameter portion of the flexible adsorption head (13) is concave inward, it pushes the larger inner diameter portion outward and flips it outward, causing the tightly attached blood vessel end to flip outward.

5. The vascular anastomosis assist device according to claim 3, characterized in that, The outer surface of the flexible adsorption head (13) is provided with scale lines (14) for measuring the diameter of blood vessels to assist in selecting a suitable vascular anastomosis ring.

6. The vascular anastomosis assist device according to claim 1, characterized in that, The flexible adsorption head (13) is made of transparent material so that when the vascular anastomosis auxiliary device together with the end of the blood vessel is pressed against the stainless steel needle of the vascular anastomosis ring, it is possible to visually observe whether the stainless steel needle has passed through the end of the blood vessel.

7. The vascular anastomosis assist device according to any one of claims 1 to 6, characterized in that, The negative pressure source is a rubber balloon (15), which is located at the proximal end of the grip handle (10); The proximal end of the hollow push tube (12) extends into the interior of the rubber balloon (15) and is sealed to the rubber balloon (15).

8. The vascular anastomosis assist device according to any one of claims 1 to 6, characterized in that, The outer wall of the hollow push tube (12) is provided with a first toothed rack (16); The operating button (11) is engaged with the first rack (16) via a gear structure.

9. The vascular anastomosis assist device according to claim 8, characterized in that, The gear structure includes a large gear section (17) and a small gear section (18). The large gear (17) is engaged with the operating button (11) in a transmission manner; The pinion section (18) is engaged with the first rack (16) of the hollow push tube (12).

10. The vascular anastomosis assist device according to claim 9, characterized in that, The operation button (11) is a push button, and the push button is provided with a second rack, which meshes with the large gear part (17); Alternatively, the operating button (11) may be a rotary knob, which directly drives the large gear section (17) to rotate.

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