Aortic clamp

Abstract

The utility model provides a kind of disposable aortic clamp for operation, including first clamp body, second clamp body and guide body, first clamp body front end is equipped with first jaw, rear part is clamp handle, middle part is curved section;Second clamp body front end is equipped with the second jaw that cooperates with first jaw, middle part is chain section, rear part is equipped with the knob of push-pull and locking integration, knob is equipped with thimble for locking inside.The guide body covers first clamp body curved section and second clamp body chain section, and is equipped with guide channel, limit chain section sliding path. Clamping site is equipped with wave-shaped elastic block, improve adhesion and decompression buffer. Through knob push-pull, realize jaw folding clamping, realize position locking by rotation. The structure does not need metal component, easy to operate, clamping is stable, applicable to disposable sterile use scene.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically relating to a disposable aortic clamp for surgical use. Background Technology

[0002] Aortic clamps, as key instruments used in surgery to temporarily block blood flow in large blood vessels (especially the aorta), are widely used in cardiac surgery, abdominal surgery, thoracic surgery, and vascular repair procedures. During surgery, clamping the aorta enables blood flow control in the surgical area, prevents massive hemorrhage, and improves the surgical field, making it a core tool for ensuring surgical safety and controlling both time and blood flow.

[0003] Currently, most aortic clamps commonly used in clinical practice are reusable metal structures, primarily employing scissor-type or lateral closing mechanisms. They achieve clamping functionality through spring return, hinge closure, or locking mechanisms. While these clamps possess a certain clamping force and durability, they also present the following major technical challenges: The clamping structure is lateral, which makes it prone to deflection or uneven force distribution. Especially in disposable plastic versions, lateral force can easily cause the clamp body to bend or the clamp head to deform, resulting in insecure clamping or the jaws to come undone, posing a potential risk of bleeding.

[0004] The complex structure often relies on metal components such as springs and pins to complete the clamping and locking functions, which is not conducive to large-scale injection molding, makes it difficult to meet the process and cost requirements of disposable products, and makes the sterilization of metal components difficult and poses a high risk of residue.

[0005] Locking structures are mostly friction-locking, which have poor stability. During surgery, they may loosen or open accidentally due to instrument vibration or tissue reaction force, making it difficult to meet the need for continuous clamping of high-pressure blood vessels such as the aorta.

[0006] The jaw structure is mostly a hard flat surface or a slightly curved jaw, which has a small contact area with blood vessels and concentrated pressure, making it easy to cause local compression damage, rupture of blood vessel walls, or postoperative vasospasm.

[0007] The operation method is not intuitive enough, making it difficult to achieve precise one-handed control. Some forceps have complex designs, requiring the surgeon to use both hands or perform complex pushing and pressing movements, which is not conducive to rapid deployment and release in confined spaces, endoscopic surgery, or emergency scenarios.

[0008] Furthermore, existing metal aortic clamps require high-temperature sterilization and repeated management after use, which is a complex process and poses a risk of cross-infection, hindering the currently advocated principles of rapid intraoperative deployment and single-use. Although some disposable clamps have begun to use plastic instead of metal, problems such as insufficient clamping strength, poor structural reliability, unpleasant handling, and locking failure have not been fundamentally resolved, and they cannot completely replace traditional metal products.

[0009] Therefore, there is an urgent need to provide an aortic clamp that is structurally reliable, stable in clamping, easy to operate, easy to lock, and suitable for single-use manufacturing. In particular, it should be able to achieve controllable clamping path, uniform clamping force, and reliable locking performance without the premise of metal structure, so as to truly meet the core clinical requirements of "safety, reliability, lightweight and single use". Utility Model Content

[0010] This invention provides a disposable aortic clamp for surgical use. Compared with the prior art, this invention has significant advantages in terms of structural stability, ease of operation, biocompatibility, manufacturing efficiency, and intraoperative safety control. It also solves many structural and operational defects of existing scissor-type and metal composite clamps.

[0011] To achieve the above objectives, this utility model provides the following technical solution: a disposable aortic clamp for surgical use, comprising a first clamp body, a second clamp body, and a guide body; the front end of the first clamp body is bent to form a first jaw, the middle part is bent backward to form a curved section, and the rear part is a clamp handle; the front end of the second clamp body is bent to form a second jaw corresponding to the first jaw, the middle part is composed of multiple chain blocks sequentially hinged into a chain segment, and the rear part is provided with a knob integrating push-pull and locking functions; the guide body covers the curved section of the first clamp body and the chain segment of the second clamp body, the guide body is fixedly covered by the first clamp body and is provided with a guide channel, the guide channel can restrict and guide the chain segment to move along the guide channel; the first clamp body and the second clamp body are arranged side by side, and the first clamp body is driven to move up and down by pushing and pulling the knob, so that the second jaw moves up and down to form a clamping action with the first jaw; the position of the second clamp body is locked by rotating the knob to maintain the clamping force on the aorta.

[0012] The knob contains a pin that passes vertically through the rear of the second clamp body and is threaded into the second clamp body. Rotating the knob causes the pin to move toward the first clamp body.

[0013] The first clamp body has an interference rack on the rear side opposite to the second clamp body. After the pin moves toward the first clamp body, its front end engages with the inter-tooth recess of the interference rack to lock the relative position of the first clamp body and the second clamp body.

[0014] Among them, the first jaw and the second jaw are respectively provided with arc-shaped elastic blocks on their opposing surfaces; the elastic blocks on the first jaw and the second jaw are staggered so that a wave-shaped clamping surface is formed when the first jaw and the second jaw are in contact.

[0015] The knob has an anti-slip textured surface on its outer circumference.

[0016] The clamp handle is a thickened structure that bends significantly backward to fit the natural curvature of the palm when gripping.

[0017] The inner cavity cross-section of the guide channel fits tightly with the cross-section of the chain segment to prevent the chain segment from deflecting or twisting during movement.

[0018] The chain segment is composed of multiple chain blocks that are hinged together sequentially by pins.

[0019] The guide body is made of medical-grade polytetrafluoroethylene material to reduce the friction of the chain segments during sliding in the guide channel.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model adopts an upper and lower clamping structure. The first clamping body and the second clamping body are arranged side by side along the longitudinal direction. The clamping force acts along the axis of the clamping body. The guide channel formed by the guide body restricts the movement direction of the chain segment, so that the clamping action is controlled and completed within a stable channel. This fundamentally eliminates the risk of the structure being twisted or bent due to lateral force. Even if a high-strength medical plastic structure is used, a stable and reliable clamping state can be maintained.

[0021] This invention is made entirely of plastic, enabling flexible propulsion. The chain segment slides within the guide channel with a clearly defined sliding path. Utilizing the low-friction fit between the materials, it achieves lightweight design and controllable clamping.

[0022] The knob of this invention can slide axially to advance the chain segment, while simultaneously rotating to move the built-in spiral pin forward, engaging with the interference rack to form a mechanical lock, thus achieving a single-finger operation integrating push-pull and rotation. The entire process can be completed with one hand, making it intuitive and highly reliable, especially suitable for vascular control scenarios with limited space and a tight operating rhythm.

[0023] 4. This utility model features wave-shaped elastic blocks on the inner sides of both the first and second jaws, with alternating crests and troughs. This creates a multi-point distributed flexible contact area during clamping, increasing the contact area while preventing excessive local pressure. The elastic blocks are made of medical-grade silicone or TPE, offering moderate softness and hardness to adapt to irregular structures on blood vessel surfaces, effectively reducing tissue compression damage.

[0024] 5. This utility model utilizes a pin inside the knob, which, after being rotated and pushed forward, directly inserts into the groove between the interference racks on the first clamping body to form a physical interference locking position. This structure is simple and reliable, requires no springs, does not rely on friction for retention, and is minimally affected by manufacturing precision. After locking, it can achieve a clamping force of tens of Newtons or more, effectively coping with intraoperative blood pressure fluctuations or tissue displacement.

[0025] 6. The entire machine structure is made of high-strength medical-grade injection-molded plastic, with components connected by interlocking or snap-fit ​​joints. It contains no metal parts and is suitable for conventional low-temperature sterilization methods such as EO ethylene oxide and gamma rays. This feature not only significantly reduces manufacturing costs but also improves product adaptability, safety, and end-use disposable properties.

[0026] In summary, compared with the prior art, this utility model has significant advantages in terms of structural stability, ease of operation, biocompatibility, processing and manufacturing efficiency, and intraoperative safety control, and solves many structural and operational defects of existing scissor-type and metal composite forceps in use. Attached Figure Description

[0027] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0028] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0029] The following are the labels in the diagram: 1. First clamp body; 11. First jaw; 12. Bending section; 13. Handle; 14. Interference rack; 2. Second clamp body; 21. First jaw; 22. Chain segment; 23. Knob; 231. Pin; 3. Guide body; 31. Guide channel; 4. Elastic block. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] See Figure 1 and 2 This utility model provides a disposable aortic clamp for surgery, including a first clamp body 1, a second clamp body 2 and a guide body 3. The first clamp body 1 and the second clamp body 2 are arranged side by side in the longitudinal direction, with a compact structure. The front end is used to clamp the aorta, and the rear end is convenient for the surgeon to operate and control with one hand.

[0032] The first clamp body 1 is the main structure of this device. It is integrally injection molded from medical-grade polycarbonate (PC) or glass fiber reinforced polypropylene (PP+GF) material. Its overall shape is an "S"-shaped curved structure, which includes three parts from front to back: the first jaw 11, the curved section 12, and the clamp handle 13.

[0033] The first jaw 11 is the bent portion at the front end of the first clamp body 1, formed by bending upwards from the main axis. The length of the bent section is 10-12 mm, and the front end profile of the jaw is slightly narrowed to about 3.5 mm to facilitate surgical insertion and positioning. An elastic block 4 is fixedly adhered to the inner surface of the first jaw 11 for aortic clamping. Its structure is a longitudinally arranged wave-like protrusion structure with a wave pitch of 1.5-2 mm and a wave height of about 0.8 mm. The elastic block 4 is made of medical-grade silicone or thermoplastic elastomer (TPE) material with a thickness of about 1.0 mm and is fixed by instant adhesive or slot-type fitting.

[0034] The curved section 12 is an arc-shaped transition structure in the middle of the first clamp body 1. Its radius of curvature is preferably 25-30 mm, and its bending length is about 40-50 mm. It serves as a guide structure to cooperate with human tissue, allowing the front jaws to smoothly enter the aortic positioning area. The outer surface of this part is provided with two longitudinal reinforcing ribs to improve its overall axial bending resistance.

[0035] The handle 13 is the rear straight handle of the first clamp body 1, with a length of 80-100 mm and an outer diameter of 10-15 mm. Its rear end is bent backward at about 60° to conform to the natural curvature of the palm. The surface of the handle can be provided with 0.5 mm high and 1 mm spaced strip-shaped anti-slip texture to improve the operator's control stability under wet hand conditions.

[0036] The second clamp 2 is located below the first clamp 1 and includes a second jaw 21 at the front end, a chain segment 22 in the middle formed by multiple chain blocks hinged together, and a push-pull structure at the rear connected to the knob 23. The entire second clamp 2 is inserted into the guide body 3 via the chain segment 22 and slides in a controlled manner in the guide channel 31 to achieve the clamping action.

[0037] The bending section of the second jaw 21 is also 10-12 mm long. Its clamping surface is also fitted with elastic blocks 4, which are offset from the elastic blocks on the first jaw 11, with the crests corresponding to the troughs, to enhance clamping stability and the flexibility of the wavy contact surface.

[0038] Chain segment 22 is composed of 4 to 7 high-strength plastic chain blocks hinged together sequentially. Each chain block is 6 mm long, 5 mm wide, and 2.5 mm thick. Adjacent chain blocks are connected by a T-shaped snap-fit ​​structure or a plastic hinge pin, which can maintain flexibility and prevent twisting within the guide channel.

[0039] The guide body 3 is a guide sleeve covering the curved section 12 and the chain segment 22, used to limit the longitudinal sliding trajectory of the second clamp body 2 and ensure clamping accuracy. It is made of medical-grade polytetrafluoroethylene (PTFE) or high-density polyethylene (HDPE) by extrusion or injection molding.

[0040] The guide channel 31 is a channel formed inside the guide body 3, with an elliptical cross-section and dimensions of 5.2 mm × 3.0 mm (width × height), which closely matches the cross-section of the chain segment 22. The inner wall surface of the guide channel 31 is smooth and has a low coefficient of friction, which ensures smooth sliding of the chain segment 22 while limiting its lateral swing and torsion, preventing displacement errors during the clamping process.

[0041] A knob 23, integrally injection molded or inserted, is provided at the tail of the first clamp 1 and the second clamp 2 for controlling the forward and backward sliding of the chain segment 22 and locking the clamp position.

[0042] The knob 23 is a short cylindrical structure with an outer diameter of 18 mm and a height of 15 mm. Anti-slip protrusions are provided on its outer circumference to enhance the operator's finger control. The knob 23 can push the chain segment 22 forward axially, thereby pushing the second clamp 2 to clamp the aorta.

[0043] The knob 23 has a push pin 231 inside. The push pin 231 is a one-piece molded plastic or metal screw with a diameter of 2 mm and a length of 25 mm. It is connected to the tail of the second clamp body 2 with a threaded hole. By rotating the knob 23, the push pin 231 can be moved forward into the first clamp body 1.

[0044] The inner wall of the first clamp body 1 is provided with an interference rack 14, which is a set of longitudinally arranged plastic concave teeth with a tooth pitch of 1 mm and a tooth height of 0.8 mm. The front end of the ejector pin 231 can be inserted into any tooth groove to form mechanical interference, thereby locking the advancing position of the chain segment 22 and preventing the blood vessel from reopening due to loosening after clamping.

[0045] Work process: In use, the doctor holds the handle 13 with one hand and places the first jaw 11 and the second jaw 21 above and below the target aorta, respectively. Then, the doctor pushes the knob 23 forward with the thumb, and the chain segment 22 moves forward along the guide channel 31, which moves the front end of the second clamp body 2 upward, so that the second jaw 21 and the first jaw 11 gradually close together, and the wave-shaped elastic block 4 contacts the surface of the blood vessel and forms a clamping and blocking state.

[0046] To maintain the clamping position, the doctor can rotate knob 23, causing the ejector pin 231 to spiral forward, its tip inserting into the interdental groove of the interference rack 14, thus completing the mechanical interference locking. In this state, regardless of whether knob 23 is subjected to external force, chain segment 22 cannot retract, and the aorta remains blocked.

[0047] When releasing the clamps after surgery, the doctor rotates the knob 23 in the opposite direction to disengage the pin 231 from the interference rack 14, thus releasing the interference; then, the knob 23 is pulled back, and the chain segment 22 retracts in the guide body 3, opening the jaws and removing the device from the body.

[0048] The entire structure is made of injection-molded plastic parts, which can be used once in a sterile environment, reducing the risk of cross-infection and improving the safety and efficiency of surgery.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A disposable aortic clamp for surgical use, characterized in that: The device includes a first clamping body (1), a second clamping body (2), and a guide body (3); the first clamping body (1) has a front end bent to form a first jaw (11), a middle part bent backward to form a curved section (12), and a rear part forming a handle (13); the second clamping body (2) has a front end bent to form a second jaw (21) corresponding to the first jaw (11), a middle part consisting of multiple chain blocks sequentially hinged to form a chain segment (22), and a rear part equipped with a knob (23) integrating push-pull and locking functions; the guide body (3) covers the curved section (12) of the first clamping body (1) and the second clamping body (2). The chain segment (22) is fixedly covered by the guide body (3) and has a guide channel (31). The guide channel (31) can restrict and guide the chain segment (22) to move along the guide channel (31). The first clamp body (1) and the second clamp body (2) are arranged side by side. The first clamp body (1) is driven to move up and down by the push-pull knob (23), so that the second jaw (21) moves up and down and forms a clamping action with the first jaw (11). The position of the second clamp body (2) is locked by rotating the knob (23) to maintain the clamping force on the aorta.

2. The disposable aortic clamp for surgical use according to claim 1, characterized in that: The knob (23) is provided with a pin (231), which passes vertically through the rear of the second clamp body (2) and is threadedly engaged with the second clamp body (2). When the knob (23) is rotated, the pin (231) moves toward the first clamp body (1).

3. The disposable aortic clamp for surgical use according to claim 2, characterized in that: An interference rack (14) is provided on the rear side of the first clamp (1) opposite to the second clamp (2). After the pin (231) moves toward the first clamp (1), its front end engages with the tooth recess of the interference rack (14) to lock the relative position of the first clamp (1) and the second clamp (2).

4. The disposable aortic clamp for surgical use according to claim 1, characterized in that: Arc-shaped elastic blocks (4) are respectively provided on the opposing surfaces of the first jaw (11) and the second jaw (21); the elastic blocks (4) on the first jaw (11) and the second jaw (21) are staggered so that a wave-shaped clamping surface is formed when the first jaw (11) and the second jaw (21) come into contact.

5. A disposable aortic clamp for surgical use according to claim 1, characterized in that: The knob (23) has an anti-slip concave-convex structure on its outer circumference.

6. The disposable aortic clamp for surgical use according to claim 1, characterized in that: The pliers handle (13) is a thickened structure that bends significantly backward to fit the natural curvature of the palm when gripping.

7. A disposable aortic clamp for surgical use according to claim 1, characterized in that: The inner cavity cross section of the guide channel (31) fits tightly with the cross section of the chain segment (22) to prevent the chain segment (22) from deflecting or twisting during movement.

8. A disposable aortic clamp for surgical use according to claim 1, characterized in that: The chain segment (22) is made up of multiple chain blocks that are hinged together in sequence by pins.

9. A disposable aortic clamp for surgical use according to claim 1, characterized in that: The guide body (3) is made of medical-grade polytetrafluoroethylene material to reduce the friction of the chain segment (22) during the sliding process in the guide channel (31).

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