Aortic dissection blocking forceps capable of being adjusted at multiple degrees of freedom

Abstract

The invention belongs to but is not limited to the technical field of medical instruments, and particularly relates to aortic dissection blocking forceps capable of being adjusted in multiple degrees of freedom, comprising a multi-joint linkage adjusting module, which has a core of a forceps arm composed of at least three lockable rotary joints, realizes multi-dimensional posture adjustment of a forceps body, and adapts to different blood vessel trends; the forceps head self-adaptive rotating module is connected to the joint at the farthest end, 360-degree continuous rotation of the forceps head is achieved, and it is ensured that the clamping face of a jaw is perpendicular to the longitudinal axis of the blood vessel; the accurate control and positioning module is integrated with an angle fine adjustment knob and an ergonomic handle, and real-time and accurate posture fine adjustment and stable holding in an operation are achieved; and the safe locking and quick release module is linked with a joint locking mechanism and a handle quick release button to realize joint locking and unlocking and quick clamp loosening under emergency conditions.

Description

Technical Field

[0001] This invention belongs to, but is not limited to, the field of medical device technology, and particularly relates to a multi-degree-of-freedom adjustable aortic dissection clamp. Background Technology

[0002] Aortic dissection is a critical clinical emergency requiring precise occlusion of the aorta in the affected area during surgery to control bleeding and create a clear surgical field. Traditional aortic occlusion clamps are mostly single- or double-degree-of-freedom structures, which suffer from limitations in joint adjustment, inability of the clamp head to adapt to complex vascular pathways, excessive local pressure in the vessel due to line contact clamping, insufficient intraoperative positioning accuracy, and inability to release quickly in emergencies. These issues can easily lead to complications such as intimal damage and rupture bleeding, increasing surgical risks. To address these challenges, a multi-joint linkage structure design has been developed to enable multi-degree-of-freedom adjustment of the aortic dissection occlusion technique, adapting to the complex vascular anatomy during aortic dissection surgery and improving the safety and precision of the occlusion procedure.

[0003] Based on the above analysis, the urgent technical problems that need to be solved by the existing technology are: the fixed angle of the traditional aortic clamp makes it impossible to flexibly adjust the position and angle during the operation, which can easily obstruct the surgical field, affect the surgeon's direct visualization of the vascular anastomosis area, and increase the difficulty and risk of the operation. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a multi-degree-of-freedom adjustable aortic dissection clamp, which is suitable for aortic occlusion operations in various types of aortic dissection (Stanford type A and type B) surgeries. It is especially suitable for dissection cases with complex vascular orientation and special anatomical locations (such as the aortic arch and the proximal descending aorta), and can be widely used in minimally invasive and open surgeries in cardiothoracic surgery and vascular surgery.

[0005] This invention is implemented as follows: a multi-degree-of-freedom adjustable aortic dissection clamp, comprising:

[0006] Multi-joint linkage adjustment module: The core is a clamp arm composed of at least 3 lockable rotary joints, which realizes multi-dimensional posture adjustment of the clamp body to adapt to different blood vessel directions;

[0007] Adaptive rotation module for the clamp head: connected to the most distal joint, it enables continuous 360° rotation of the clamp head, ensuring that the clamping surface of the jaws is perpendicular to the longitudinal axis of the blood vessel.

[0008] Precision control and positioning module: integrates an angle fine-tuning knob and an ergonomic handle to achieve real-time, precise posture fine-tuning and stable grip during surgery;

[0009] Safety locking and quick release module: Links the joint locking mechanism with the handle quick release button to achieve joint locking, unlocking, and quick release of the clamp in emergencies.

[0010] Furthermore, the multi-joint linkage adjustment module specifically includes:

[0011] Joint Structure Design: The clamp arm adopts a segmented structure with three or more lockable rotary joints. Each joint is 8-12mm long, and the overall clamp arm length is available in two specifications: 250-300mm for minimally invasive applications and 180-220mm for open applications. Each joint uses a "rotation axis + ratchet and pawl locking mechanism." The rotation axis is made of medical-grade titanium alloy with a polished surface to reduce rotational friction; the pawl is made of flexible medical-grade stainless steel to ensure no loosening after locking. To unlock, simply press the unlock button to release the lock and achieve flexible rotation.

[0012] Joint rotation range and locking accuracy: The rotation angle range of each lockable rotary joint is 0-180°, and the rotation step accuracy is ≤1°; the locking mechanism adopts a two-way locking design, which can lock at any rotation angle, and the axial and radial displacement of the joint after locking is ≤0.1mm.

[0013] Forceps arm material and strength design: The main body of the forceps arm is made of medical-grade titanium alloy, which combines lightweight and high strength. The overall weight of the minimally invasive type is ≤150g and the overall weight of the open type is ≤200g. The surface of the forceps arm is anodized to improve corrosion resistance and can withstand high temperature and high pressure sterilization. The forceps arm is equipped with a reinforcing rib structure inside.

[0014] Furthermore, the pliers head adaptive rotation module specifically includes:

[0015] The clamp head and joint connection structure: The clamp head and the farthest lockable rotating joint are connected by a ball bearing and a sealed dustproof structure, enabling 360° continuous rotation of the clamp head without dead angles, with rotational resistance ≤5N. The ball bearing is a medical-grade ceramic bearing, and the sealed dustproof structure uses a medical-grade silicone sealing ring.

[0016] Based on the structural parameters of the aforementioned vascular occlusion device, and considering the actual surgical operating space and experience with existing similar devices, the original technical solution is modified and optimized as follows:

[0017] This technical solution addresses the application requirements of blocking vessels with diameters ranging from 30 to 60 mm, and extending to 80 to 100 mm in special cases. It involves a systematic optimization of the clamp structure and dimensions. Firstly, regarding the clamp length, the multi-specification configuration approach is retained. The original 50mm and 80mm length system is further standardized into a graded size structure, optimized for clinical adaptability into three sizes: small (50mm), medium (70mm), and large (100mm), to cover different vessel diameters and surgical scenarios. Simultaneously, the clamp head width is significantly modified. Considering the limited operating space in thoracic or abdominal surgeries, the original 8-10mm width easily caused visual obstruction and operational interference. The clamp head width is now optimized to a range of 3-5mm, with approximately 3mm for the small size, 4mm for the medium size, and 5mm for the large size. This significantly improves operational flexibility while ensuring clamping stability.

[0018] Regarding the clamp head structure, an arc-shaped design is continued to match the natural curvature of large blood vessels such as the aorta. The radius of the arc can be optimized to match different specifications. The clamp head length is controlled within the range of 15-20mm to balance the clamping coverage area and the need for precise operation. The clamping surface adopts a planar structure and is treated with an anti-slip texture. The texture depth is controlled within 0.1-0.2mm to enhance friction against the blood vessel surface and prevent slippage, while also preventing excessive damage to the blood vessel wall. In addition, the clamping surface size is further standardized into three specifications: small 10×5mm, medium 12×6mm, and large 15×8mm, to achieve a coordinated match with the overall clamp body size.

[0019] By systematically modifying the jaw length, jaw width, and clamping structure, this instrument can effectively improve surgical operability and safety while ensuring the blocking effect, and has better clinical adaptability.

[0020] The inside of the jaws is wrapped with a medical-grade silicone pad. The silicone has a Shore A hardness of 30-40A, combining elasticity and support to further disperse the clamping pressure.

[0021] Furthermore, the precision control and positioning module specifically includes:

[0022] Handle Structure Design: The handle adopts an ergonomic design with anti-slip texture on the grip area to conform to the contour of the surgeon's hand and effectively prevent hand slippage during surgery. The handle length is preferably designed to be 100-120mm to meet the clinical needs of different hand shapes and operating habits, ensuring grip stability while improving control precision. The handle diameter is controlled within the range of 25-30mm, which provides a good grip and effectively reduces hand fatigue during long surgery, thus balancing comfort and force transmission efficiency. It is suitable for delicate surgical operations and adaptable to surgeons with different hand shapes. The handle and forceps arm are connected in one piece with a reinforced structure at the connection point.

[0023] Angle fine-tuning knob design: An angle fine-tuning knob is set at the proximal end of the handle, which is linked with the multi-joint linkage mechanism and adopts a precision thread transmission design. One rotation of the fine-tuning knob adjusts the angle of the clamp arm posture by ≤5°, with a fine-tuning accuracy of ≤0.5°. The surface of the fine-tuning knob is marked with scale markings, and the knob adopts an anti-slip design to facilitate operation while wearing gloves during surgery.

[0024] Furthermore, the security locking and quick release module specifically includes:

[0025] Joint locking mechanism: Each lockable rotary joint is equipped with an independent locking button located on the side of the joint. Pressing the button unlocks the joint, and releasing the button automatically locks it. A master locking switch is located at the handle, which allows for simultaneous locking and unlocking of all joints, preventing joint loosening due to intraoperative misoperation. The locking mechanism employs a redundant design to ensure that if a single locking structure fails, the backup locking structure can function normally.

[0026] Quick-release mechanism: A quick-release button is located at the distal end of the handle, linked to the jaw clamping mechanism. It features a push-button design; pressing the button quickly releases the jaws, with a release time of ≤0.5 seconds. This is suitable for rapid release of the jaws in emergency situations during surgery. The quick-release button is designed to prevent accidental activation; it must be pressed all the way down to trigger release. The button surface is clearly marked.

[0027] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this invention are as follows:

[0028] Material safety: All parts that come into contact with the human body are made of medical-grade compliant materials, with no metal ion release, and have undergone rigorous biocompatibility testing to eliminate safety hazards such as allergies and toxicity;

[0029] Structural safety: The locking mechanism adopts a redundant design to avoid safety accidents caused by the failure of a single structure; the quick release button is equipped with an anti-accidental contact structure to prevent accidental operation during surgery; the clamp jaw silicone pads and anti-slip design prevent vascular damage;

[0030] Sterilization safety: The product can withstand high temperature and high pressure sterilization, leaving no residue or performance degradation after sterilization, thus avoiding cross-contamination.

[0031] Structural reliability: The joint rotation mechanism, locking mechanism, and quick release mechanism have undergone more than 10,000 fatigue tests to ensure long-term trouble-free use; the clamp arm is designed with reinforcing ribs to prevent deformation during clamping;

[0032] Performance stability: During mass production, each product undergoes rigorous performance testing to ensure that indicators such as fine-tuning accuracy, locking stability, and clamping performance meet the standards;

[0033] After-sales support: We have established a comprehensive after-sales system to promptly address product issues that arise during clinical applications, providing product repair, replacement, and operation training services to ensure the long-term stable use of the device.

[0034] Multi-degree-of-freedom adaptation design: It adopts three or more lockable rotary joints in linkage, combined with the 360° continuous rotation of the forceps head, which solves the pain points of insufficient freedom of traditional blocking forceps and inability to adapt to complex blood vessel routes, and achieves precise positioning under any blood vessel route.

[0035] Surface contact clamping technology: By rotating the clamping head and optimizing the clamping surface, surface contact clamping with the clamping jaw perpendicular to the longitudinal axis of the blood vessel is achieved, which disperses the clamping pressure, significantly reduces the risk of damage to the vascular intima, and improves the safety of occlusion;

[0036] Precise control and rapid response: The integrated angle fine-tuning knob and rapid release mechanism enable real-time and precise posture fine-tuning during surgery, and rapid release of forceps in emergency situations, balancing maneuverability and safety, and improving surgical efficiency.

[0037] Ergonomics and Clinical Adaptability: Lightweight materials and ergonomic handle design reduce the intensity of doctor's operation; multi-size clamp head design adapts to aortas of different diameters, expanding the scope of application.

[0038] This invention addresses the complex aortic structure and fragile intima in patients with aortic dissection by proposing a specialized clamp design, filling the gap in existing technology for instruments specifically designed for this type of vascular lesion. Compared to currently available general-purpose aortic clamps that struggle to achieve effective apposition and stable occlusion, this invention optimizes the clamp head's arc matching, clamping surface structure, and dimensional parameters to achieve precise apposition and uniform force on the dissected aorta, significantly reducing the risk of secondary intimal damage. Simultaneously, by reducing the clamp head width and optimizing the overall structural layout, it improves operational flexibility in confined surgical spaces, avoiding interference with surrounding tissues. This invention effectively solves key technical challenges such as incomplete occlusion, unstable clamping, and limited operation, significantly improving surgical safety and ease of operation, and possesses significant clinical application value. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the aortic dissection occlusion clamp that can be adjusted with multiple degrees of freedom according to an embodiment of the present invention;

[0040] In the diagram: 1. Multi-joint linkage adjustment module; 2. Adaptive rotation module for the clamp head; 3. Precision control and positioning module; 4. Safety locking and quick release module. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] like Figure 1 As shown, this invention provides a multi-degree-of-freedom adjustable aortic dissection clamp. The overall design adopts an integrated architecture of "multi-joint linkage clamp arm + 360° rotating clamp head + precision control handle + locking / release mechanism," and is divided into four main functional modules: multi-joint linkage adjustment module 1, clamp head adaptive rotation module 2, precision control and positioning module 3, and safety locking and rapid release module 4. These modules work together to achieve multi-degree-of-freedom adjustment, precise clamping, stable positioning, and safe operation of the clamping device. The specific architecture is as follows:

[0043] Multi-joint linkage adjustment module 1: The core is a clamp arm composed of at least 3 lockable rotary joints, which realizes multi-dimensional posture adjustment of the clamp body and adapts to different blood vessel directions;

[0044] Forceps head adaptive rotation module 2: Connected to the most distal joint, it enables the forceps head to rotate 360° continuously, ensuring that the clamping surface of the jaws is perpendicular to the longitudinal axis of the blood vessel.

[0045] Precision control and positioning module 3: integrates an angle fine-tuning knob and an ergonomic handle to achieve real-time, precise posture fine-tuning and stable grip during surgery;

[0046] Safety Locking and Quick Release Module 4: Links the joint locking mechanism and the handle quick release button to achieve joint locking, unlocking, and quick release of the clamp in emergencies.

[0047] The multi-joint linkage adjustment module 1 specifically includes:

[0048] Joint Structure Design: The clamp arm adopts a segmented structure with three or more lockable rotating joints. The joint spacing is optimized according to the intraoperative operating range (single joint length 8-12mm). The overall clamp arm length is suitable for both minimally invasive and open surgery (two specifications are available: minimally invasive type 250-300mm, open type 180-220mm). Each joint uses a "rotation axis + ratchet and pawl locking mechanism". The rotation axis is made of medical-grade titanium alloy with a polished surface to reduce rotational friction; the pawl is made of flexible medical-grade stainless steel to ensure no loosening after locking. To unlock, simply press the unlock button to release the lock and achieve flexible rotation.

[0049] Joint rotation range and locking accuracy: The rotation angle range of each lockable rotating joint is 0-180°, and the rotation step accuracy is ≤1°, which meets the needs of fine posture adjustment during surgery; the locking mechanism adopts a two-way locking design, which can lock at any rotation angle. After locking, the axial and radial displacement of the joint is ≤0.1mm, ensuring stable positioning during surgery and avoiding joint loosening due to vibration during surgical operation, which would affect the blocking effect.

[0050] Forceps arm material and strength design: The main body of the forceps arm is made of medical-grade titanium alloy, which combines lightweight and high strength. The overall weight is ≤150g (minimally invasive type) and ≤200g (open type), reducing the fatigue of doctors during long-term operation. The surface of the forceps arm is anodized to improve corrosion resistance and can withstand high temperature and high pressure sterilization (134℃, 0.2MPa, sterilization time 18min), meeting the requirements for repeated use. The forceps arm is equipped with a reinforcing rib structure to ensure no deformation during clamping and stable clamping force transmission.

[0051] The pliers head adaptive rotation module 2 specifically includes:

[0052] The forceps head and joint connection structure: The forceps head and the distal locking rotary joint are connected using a "ball bearing + sealed dustproof structure," enabling continuous 360° rotation of the forceps head without dead angles. The rotation process is smooth and without jamming, with rotational resistance ≤5N. The ball bearing is a medical-grade ceramic bearing, which has the advantages of wear resistance, corrosion resistance, and no metal ion release. The sealed dustproof structure uses a medical-grade silicone sealing ring to prevent blood and tissue fluid from entering the bearing during surgery, affecting rotational performance and service life.

[0053] Clamp head and jaw design: The clamp head features an arc-shaped design to fit the curved contour of the aorta. The clamp head is 15-20mm long and 8-10mm wide to avoid obstructing the surgical field of view. The clamp jaws have a flat design with a non-slip textured surface (texture depth 0.1-0.2mm) to ensure non-slip gripping. The clamping surface size is optimized according to the aortic diameter (three sizes are available: small 10×5mm, medium 12×6mm, and large 15×8mm). This ensures that regardless of the vessel's orientation, the clamping surface can be perpendicular to the vessel's longitudinal axis through 360° rotation and joint adjustment of the clamp head, achieving surface contact clamping and distributing clamping pressure.

[0054] The inside of the clamp jaws is wrapped with a medical-grade silicone pad. The silicone has a Shore A hardness of 30-40A, which combines elasticity and support. This further disperses the clamping pressure (clamping pressure ≤50kPa, lower than the aortic wall's tolerance pressure threshold), avoiding damage to the vascular endothelium during clamping and reducing the risk of vascular rupture and thrombosis.

[0055] The precision control and positioning module 3 specifically includes:

[0056] Handle Structure Design: The handle adopts an ergonomic design with anti-slip texture on the grip area, conforming to the contour of the doctor's hand for a comfortable grip and effectively preventing hand slippage during surgery; the handle length is 100-120mm and the diameter is 25-30mm, accommodating doctors with different hand shapes; the handle and forceps arm are integrated, with a reinforced structure at the connection point to ensure precise force transmission without wobbling.

[0057] Angle fine-tuning knob design: An angle fine-tuning knob is located at the proximal end of the handle, linked to the multi-joint linkage mechanism. Utilizing a precision threaded transmission design, one rotation of the knob adjusts the forceps arm posture angle by ≤5°, with a fine-tuning accuracy of ≤0.5°. This allows for real-time, precise posture adjustments during surgery, ensuring accurate alignment of the forceps jaws with the occlusion site. The knob surface features graduated markings (0.5° increments) for easy visual observation and adjustment by the surgeon, improving positioning accuracy. The knob also features a non-slip design, facilitating operation while wearing gloves during surgery.

[0058] The security locking and quick release module 4 specifically includes:

[0059] Joint locking mechanism: Each lockable rotary joint is equipped with an independent locking button located on the side of the joint. Pressing the button unlocks the joint, and releasing the button automatically locks it, making operation convenient. Simultaneously, a master locking switch is located at the handle, enabling simultaneous locking and unlocking of all joints to prevent joint loosening due to intraoperative misoperation and improve operational safety. The locking mechanism employs a redundant design, ensuring that if a single locking structure fails, the backup locking structure can function normally, eliminating potential safety hazards during surgery.

[0060] Rapid Release Mechanism: A rapid release button is located at the distal end of the handle, linked to the clamping mechanism. Using a press-type design, pressing the button quickly releases the clamps, with a release time of ≤0.5 seconds. This is suitable for rapid release of clamps in emergency situations during surgery (such as ruptured blood vessels or arrhythmias), buying valuable time for rescue. The rapid release button features an anti-accidental activation structure; it must be pressed fully to trigger release, preventing accidental release during surgery. The button surface is clearly marked for easy identification by the surgeon.

[0061] The working principle of the multi-degree-of-freedom adjustable aortic dissection clamp provided in this embodiment of the invention is as follows:

[0062] 1. Preoperative preparation: Select an appropriate occlusion device according to the type of aortic dissection and the diameter of the vessel, and sterilize it under high temperature and high pressure before use; During the operation, the doctor holds the handle and sends the clamp head to the vicinity of the aortic occlusion site according to the surgical approach (minimally invasive / open).

[0063] 2. Multi-degree-of-freedom posture adjustment: Press the joint locking button to release the joint lock. Adjust the angle of 3 or more lockable rotating joints to adapt the clamp arm to the direction of the blood vessel. At the same time, rotate the clamp head (360° continuous rotation) to adjust the orientation of the clamp jaws and ensure that the clamping surface is perpendicular to the longitudinal axis of the aorta, thus achieving the initial positioning of surface contact clamping.

[0064] 3. Precise positioning and locking: The angle fine-tuning knob at the handle allows for precise adjustment of the clamp arm posture. Combined with intraoperative imaging guidance (such as DSA and ultrasound), this ensures that the clamp jaws are precisely aligned with the blocking site. After adjustment, release the joint locking button to achieve independent locking of each joint, or press the master locking switch to achieve synchronous locking of all joints, ensuring stable positioning.

[0065] 4. Closure procedure: Slowly close the jaws and clamp the aorta using a surface contact clamping method. The silicone pad and anti-slip texture ensure a firm grip without slipping, while dispersing the clamping pressure to avoid damaging the vascular intima. If the posture needs to be adjusted during the procedure, press the joint locking button again to unlock and make minor adjustments. After adjustment, lock it again.

[0066] 5. Release procedure: After the surgery, press the joint locking button to unlock the joint, slowly release the clamps to complete the routine release; in case of emergency, press the quick release button directly to quickly release the clamps and promptly relieve the vascular obstruction.

[0067] A comparative analysis of existing general-purpose aortic clamps used in clinical practice with the clamp specifically designed for this invention reveals significant improvements in structural design, parameter matching, and clinical adaptability, demonstrating outstanding substantive features and marked technological advancements. Existing instruments are mostly designed for ordinary blood vessels, and their clamp head shapes and clamping surface structures typically employ general straight or highly curved structures. These are ill-suited to the complex layering and irregular dilation characteristics of aortic dissection patients, easily leading to problems such as improper clamping and uneven local force during actual use, resulting in incomplete occlusion or even inducing further intimal tearing. Furthermore, the clamp head width of existing instruments is generally large, which can obstruct the surgical field in limited operating spaces such as the thoracic cavity, affecting precise manipulation and increasing surgical difficulty and risk.

[0068] In contrast, this invention is specifically designed for the pathological structure of aortic dissection. The clamp head structure adopts an arc-shaped configuration that matches the arcuate contour of the aorta, and through different specifications, it achieves precise adaptation to vessels within a range of 30–100 mm, making the clamping process more uniform and stable, effectively avoiding localized high stress concentration, and reducing the risk of intimal damage from the source. Simultaneously, this invention significantly optimizes the clamp head width, controlling it within the range of 3–5 mm. While ensuring sufficient clamping force, it greatly reduces the space occupied during surgery, allowing the surgeon to perform precise operations even in complex environments, significantly improving surgical controllability and safety. Regarding the clamping surface, by introducing a 0.1–0.2 mm deep anti-slip textured structure, it enhances the frictional contact with the vessel wall, preventing slippage and ensuring a stable and reliable occlusion effect.

[0069] This invention, through a graded design of clamp length and clamping surface dimensions, enables instruments of different specifications to correspond to aortas of different diameters and anatomical locations, achieving a higher degree of individualized adaptation, rather than the "one-size-fits-all" approach of existing technologies. This multi-parameter synergistically optimized structural system not only improves the occlusion effect but also takes into account the needs of ease of operation and tissue protection. In summary, this invention is not a simple dimensional adjustment or conventional optimization of existing occlusion clamps, but a holistic structural reconstruction scheme based on the unique pathological characteristics of aortic dissection. It differs significantly in both technical conception and implementation path, effectively solving key problems that have long existed in existing technologies, such as intimal damage, incomplete occlusion, and operational limitations, demonstrating outstanding inventiveness and significant practical value.

[0070] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not 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 invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0071] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-degree-of-freedom adjustable aortic dissection clamp, characterized in that, Includes clamp arm assembly, clamp head assembly, handle assembly, and lock release assembly; The clamp arm assembly consists of at least three sequentially connected joint segments, with a lockable rotary joint between adjacent joint segments. Each lockable rotary joint has a rotating state and a locked state. The jaw assembly is located at the far end of the jaw arm assembly and is rotatably connected to the farthest lockable rotary joint so that the jaw assembly can be circumferentially rotated relative to the jaw arm assembly. The handle assembly is located near the end of the clamp arm assembly and is connected to the adjustment mechanism of the lockable rotary joint for driving the clamp arm assembly to adjust its posture. The locking and releasing components are respectively connected to the clamping mechanisms of each lockable rotary joint and jaw assembly, and are used to realize joint locking, joint unlocking and jaw quick release; Each lockable rotary joint works together to adjust the spatial posture of the clamp arm. The rotation axis of the clamp head assembly intersects with the axis of the end of the clamp arm, so that the clamp jaw gripping surface can be adjusted to a working posture perpendicular to the longitudinal axis of the target blood vessel.

2. The aortic dissection clamp with multi-degree-of-freedom adjustment according to claim 1, characterized in that, The lockable rotary joint is a ratchet and pawl locking structure, which includes a rotating shaft, a ratchet component, an elastic locking component, and an unlocking component; When the unlocking component is subjected to external force, it causes the elastic locking component to disengage from the ratchet component, thereby releasing the lock. After the external force is removed, the elastic locking element re-engages with the ratchet element, restoring the lock.

3. The aortic dissection clamp with multi-degree-of-freedom adjustment according to claim 1, characterized in that, The clamp arm assembly is available in two length specifications: 250 to 300 mm and 180 to 220 mm. The length of each joint segment is 8 to 12 mm; Each lockable rotary joint has a rotation range of 0 to 180°; The axial and radial displacements of each lockable rotary joint in the locked state are no greater than 0.1 mm.

4. An adaptive rotating clamp head assembly for aortic dissection occlusion clamps, characterized in that, Includes a connector, a rotary joint, a pliers head body, and a jaw clamping part; The rotary joint is located between the connecting seat and the pliers body, and the pliers body rotates continuously circumferentially relative to the connecting seat via the rotary joint. The pliers head body has an arc structure, and the jaw clamping part is located at the front end of the pliers head body. The jaw clamping part has clamping surfaces that are arranged opposite to each other. The clamping surface has a planar structure, and the surface of the clamping surface is provided with anti-slip texture, and the inner side of the clamping surface is provided with an elastic buffer layer; The extension direction of the arc-shaped structure matches the clamping direction of the clamping surface, so that the clamping jaws form a surface contact clamping state when they are attached to the outer wall of the aorta.

5. The adaptive rotating pliers assembly according to claim 4, characterized in that, The rotary joint adopts a rolling support structure, and a sealing structure is provided between the connecting seat and the pliers body; the rotational resistance of the pliers body relative to the connecting seat is no greater than 5 N; The clamp head body can rotate continuously 360°.

6. The adaptive rotating pliers assembly according to claim 4, characterized in that, The length of the pliers head body is 15 to 20 mm; The width of the pliers head body is 3 to 5 mm; The clamping surface is available in three sizes: 10 mm x 5 mm, 12 mm x 6 mm, and 15 mm x 8 mm. The depth of the anti-slip texture is 0.1 to 0.2 mm; The elastic buffer layer is a medical-grade silicone layer with a hardness of Shore 30 to 40A.

7. A precision control and safe release assembly for aortic dissection clamping, characterized in that, Includes the handle body, fine-tuning mechanism, main locking mechanism, and quick-release mechanism; The handle body is for the operator to hold; The fine-tuning mechanism is located on the handle body and is connected to the multi-joint linkage mechanism of the clamping forceps for driving the end posture of the clamping forceps to make small-angle adjustments. The main locking mechanism is located on the handle body and connected to multiple joint locking units, used to control the multiple joint locking units to enter the locked state or enter the unlocked state simultaneously. The quick release mechanism is located on the handle body and connected to the jaw clamping mechanism, and is used to release the jaw clamping state after being triggered.

8. The precision control and safe release component according to claim 7, characterized in that, The fine-tuning mechanism is a knob-driven transmission structure. The angle of change in the posture of the blocking clamp end corresponding to one rotation of the knob is no greater than 5°, and the fine-tuning accuracy is no greater than 0.5°. The knob surface is equipped with an anti-slip structure and angle scale.

9. The precision control and safe release component according to claim 7, characterized in that, The quick-release mechanism is a press-triggered structure, and the time from the start of triggering to the release of the jaws from the clamping state is no more than 0.5 seconds; The quick release mechanism is equipped with a limit anti-accidental contact structure, and the release action can only be triggered after pressing to the predetermined stroke.

10. The precision control and safe release component according to claim 7, characterized in that, The handle body has an ergonomic grip structure, and the grip part is provided with anti-slip texture; The handle body has a length of 100 to 120 mm and a diameter of 25 to 30 mm; The handle body and the clamp arm are integrated into a single structure, and the connection part is reinforced.

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