Vascular clamp capable of preventing blood vessel from being punctured and detained

Abstract

The utility model relates to a vascular clamp capable of preventing blood vessels from being punctured and detained, and belongs to the technical field of medical instruments. Comprising a first clamping arm and a second clamping arm, and the tail end of the first clamping arm and the tail end of the second clamping arm are provided with a pressing part and a bearing part respectively; the pressing part extends from the tail end of the corresponding first clamping arm to bend towards the second clamping arm; the bearing parts extend from the tail ends of the corresponding second clamping arms to bend towards the first clamping arms; the overall length of the first clamping arm and the overall length of the second clamping arm have a length difference, a preset elastic arm section is arranged on the first clamping arm and / or the second clamping arm, and the elastic arm section generates elastic deformation when the vascular clamp is closed. According to the utility model, the risk that tissues are punctured or torn due to stress concentration is avoided, and the risk that the tissues fall off due to passive opening is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a vascular clamp that prevents vascular puncture and retention. Background Technology

[0002] Vascular clamps are a crucial surgical instrument that plays a vital role in both open and endoscopic minimally invasive surgeries. They can quickly and effectively close blood vessels to stop bleeding or clamp other tubular tissues to block the flow of contents during surgery.

[0003] However, a type of traditional vascular clamp widely used in clinical practice typically has a symmetrical, equal-arm-length structure with interlocking teeth at the clamping ends. This tooth-to-tooth occlusal structure presents several drawbacks in practical applications, especially when handling delicate tissues or tissues in dynamic environments (such as the digestive tract):

[0004] When two toothed clamping arms close, the clamping forces from two directions are not evenly distributed on a single surface, but are highly concentrated on each of the opposing tooth tips. This creates multiple stress concentration points with extremely high pressure on the tissue. For fragile biological tissues such as blood vessel walls and intestinal walls, this pressure can easily cause the tissue to be directly punctured or torn.

[0005] In addition, when tissues are subjected to internal pressure (such as vascular pulsation) or external disturbances (such as gastrointestinal peristalsis, patient turning over, coughing, etc.), the clamps are prone to slight rotation or torsion. This torsion can cause the originally aligned teeth to shift, thereby dislodging them from their original anchor points on the tissue, resulting in the clamping force failing and the clamp falling off, increasing the risk of the vascular clamp remaining in the body. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a vascular clamp that prevents vascular puncture and retention.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A vascular clamp is provided to prevent vascular puncture and retention, comprising:

[0009] The first clamping arm and the second clamping arm are respectively provided with a pressing part and a supporting part at their ends;

[0010] The compression portion extends from the end of its corresponding first clamping arm and bends toward the second clamping arm;

[0011] The supporting portion extends from the end of its corresponding second clamping arm and bends toward the first clamping arm;

[0012] Furthermore, the first clamping arm and the second clamping arm have a length difference, so that the pressing part and the supporting part can interlock with each other in a staggered manner to form a clamping state with at least two locking points;

[0013] Furthermore, the first clamping arm and / or the second clamping arm are provided with a preset elastic arm segment, which undergoes elastic deformation when the vascular clamp is closed.

[0014] Preferably, the supporting part includes a supporting surface, and the two side edges of the supporting surface form at least two locking points when they engage with the pressing part.

[0015] Preferably, the supporting surface of the supporting part has a flat, blunt, toothless structure.

[0016] Preferably, the supporting surface of the supporting part and / or the contact surface of the pressing part are provided with a toothed structure.

[0017] Preferably, the support portion is formed by bending at an obtuse angle relative to its corresponding second clamping arm;

[0018] And / or the compression portion is formed by bending at an obtuse angle relative to its corresponding first clamping arm.

[0019] Preferably, when the vascular clamp is in the closed state, the vertex of the bending angle of the compression part is projected vertically onto the supporting surface, and the projection point is located on the centerline of the supporting surface.

[0020] Preferably, the support portion has at least two constraint protrusions;

[0021] The pressing part is provided with a constraint groove corresponding to the constraint protrusion;

[0022] When the supporting part contacts the pressing part, the constraint protrusion couples with the constraint groove.

[0023] Preferably, the bases of the first clamping arm and the second clamping arm are pivotally connected to each other to form a pivot.

[0024] Preferably, the base is further provided with a coupling interface for receiving an external operating element to drive the first clamping arm and the second clamping arm to rotate about the pivot.

[0025] Preferably, the elastic arm segment is a partially thinned area, an S-shaped bending area, or a slotted area integrally formed on the first clamping arm and / or the second clamping arm.

[0026] This utility model provides a vascular clamp that prevents blood vessel puncture and retention. The beneficial effects of this utility model are reflected in:

[0027] When the supporting part and the pressing part clamp the tissue, they can provide a longer and larger contact area. The pressure is not concentrated, but is applied more evenly to the tissue between them, which greatly disperses the pressure and avoids the risk of tissue puncture or tearing caused by stress concentration.

[0028] Secondly, the staggered engagement state increases the contact area between the two parts, which in turn increases the friction, thereby reducing the risk of them being passively opened and falling off. Attached Figure Description

[0029] Figure 1 This is a front view of the vascular clamp for preventing vascular puncture and retention proposed in this utility model.

[0030] Figure 2 This is one of the structural schematic diagrams of the first and second clamping arms in the anti-vascular puncture and anti-retention method proposed in this utility model;

[0031] Figure 3 This is the second schematic diagram of the structure of the first and second clamping arms in the vascular clamp for preventing vascular puncture and retention proposed in this utility model.

[0032] Figure 4 This is a schematic diagram of the structure of the first clamping arm in the vascular clamp that prevents vascular puncture and retention proposed in this utility model.

[0033] Figure 5 This is a schematic diagram of the structure of the second clamping arm in the vascular clamp that prevents vascular puncture and retention proposed in this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. First clamping arm; 101. Pressing part; 1011. Contact surface; 2. Second clamping arm; 201. Supporting part; 2011. Supporting surface; 3. Elastic arm segment; 4. Toothed structure; 501. Constraint protrusion; 502. Constraint groove; 6. External operating component. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Please see Figures 1-5 As shown, the specific embodiments provided by this utility model are as follows:

[0038] like Figure 1As shown, an embodiment of the present invention provides a vascular clamp that prevents vascular puncture and retention, the vascular clamp comprising a first clamping arm 1 and a second clamping arm 2.

[0039] The first clamping arm 1 and the second clamping arm 2 can be connected to each other at their bases and can be brought closer together or opened apart by external force. At the functional ends of the first clamping arm 1 and the second clamping arm 2 away from the base, a compression part 101 and a support part 201 for direct contact with vascular tissue are integrally formed, respectively.

[0040] Specifically, the compression portion 101 extends from the end of the first clamping arm 1 and is bent towards the second clamping arm 2. Correspondingly, the support portion 201 extends from the end of the second clamping arm 2 and is bent towards the first clamping arm 1. This opposing bending structure allows the compression portion 101 and the support portion 201 to approach each other when the two clamping arms are closed, thereby applying a clamping force to tubular tissues such as blood vessels placed between the first clamping arm 1 and the second clamping arm 2.

[0041] like Figures 2 to 3 As shown, in this embodiment, the overall lengths of the first clamping arm 1 and the second clamping arm 2 are unequal, i.e., they have a preset length difference. This length difference means that when the vascular clamp is fully closed, the compression part 101 and the support part 201 do not bite together tooth to tooth as in a traditional vascular clamp, but rather bite each other in a staggered manner.

[0042] Based on this, firstly, in terms of preventing blood vessel puncture, for some larger diameter tissues, when the compression portion 101 and the supporting portion 201 are closed, the tissue is clamped between them. In this case, when the supporting portion 201 and the compression portion 101 clamp the tissue, they can provide a longer and larger contact area, and the pressure is not concentrated, but rather applied more evenly to the tissue between them. This contact method changes the traditional tooth-to-tooth contact pattern, greatly dispersing the pressure and avoiding the risk of tissue puncture or tearing caused by stress concentration.

[0043] Secondly, in terms of preventing retention (i.e., preventing slippage), the interlocking state of the front and rear increases the contact area between the two, and the friction will increase synchronously, thereby reducing the risk of passive opening and falling off. On the other hand, when the tissue is clamped in it, the tissue enters a nonlinear space enclosed by the compression part 101 and the support part 201.

[0044] Specifically, this nonlinear space is formed by the curved inner surface of the compression part 101 and the curved inner surface of the support part 201, which are misaligned. When tissue is placed in it and clamped, the tissue is not simply flattened between two parallel planes, but is forced to deform along a curved path similar to an "S" or "Z".

[0045] Compared to the linear contact of traditional clamps, this curved path results in a wider effective contact area and positive pressure distribution between the tissue and the clamp arm, increasing the static friction required to prevent longitudinal slippage and thus improving the anti-slippage effect.

[0046] Based on the above, specifically, the first clamping arm 1 and / or the second clamping arm 2 are provided with a preset elastic arm segment 3. For example, the elastic arm segment 3 may be a partially thinned area, an S-shaped bending area, or a slotted area integrally formed on the clamping arm.

[0047] In this embodiment, the elastic arm segment 3 undergoes elastic deformation when the vascular clamp closes. It acts like a buffer, absorbing the energy from arterial pulsation. Regardless of how the blood vessel pulsates, the elastic arm segment 3 can compensate through its own deformation, always applying a continuous clamping force to the blood vessel. This protects the blood vessel while fundamentally eliminating the risk of slippage caused by pulsation.

[0048] Furthermore, surgeons rely entirely on feel when applying vascular clamps, making precise control difficult. With rigid clamps, even slight over-force can cause irreversible crushing damage to the vessel wall, especially the fragile intima. The elastic arm 3 in this embodiment provides a mechanical buffer. Once the closure force reaches a threshold sufficient to effectively block blood flow but still within a safe range, excess force is preferentially absorbed by the deformation of the elastic arm 3, rather than being directly transmitted to the vessel. This significantly improves the margin of error and safety of the procedure, effectively preventing iatrogenic vascular injury.

[0049] In a preferred embodiment, the support portion 201 includes a support surface 2011 with a certain width.

[0050] Due to the length difference between the first clamping arm 1 and the second clamping arm 2 in this invention, when the two are closed, the two side edges of the supporting surface 2011 abut against the inner surface of the pressing part 101, forming two contact points, thereby improving the stability of the connection between the two. On the other hand, when tissue is clamped between the supporting part 201 and the pressing part 101, the two side edges of the supporting surface 2011 also form locking points, thereby improving the contact stability between the tissue and the supporting surface 2011.

[0051] In a preferred embodiment, the support surface 2011 of the support portion 201 is a flat, blunt, toothless structure.

[0052] Specifically, the supporting surface 2011 can be a flat plane or a gently curved surface. This expands the force on the clamped tissue from several high-pressure points on the traditional tooth tips into a uniformly pressured surface. This greatly disperses the pressure per unit area, avoiding dangerous stress concentration points on fragile blood vessel or intestinal walls, thus eliminating the risk of tissue puncture, tearing, or localized ischemic necrosis caused by the tooth-like structure 4.

[0053] In another preferred embodiment, in order to provide maximum clamping friction for thicker or extremely smooth and moist tissues, the support surface 2011 of the support portion 201 or the contact surface 1011 of the compression portion 101 may be provided with a toothed structure 4.

[0054] Specifically, when a toothed structure 4 is provided on the contact surface 1011 of the pressing part 101 or the supporting surface 2011 of the supporting part 201, a tooth-to-tooth pressing method is formed, which can provide stronger gripping force while minimizing the risk of tissue puncture.

[0055] This embodiment with the toothed structure 4 is particularly suitable for scenarios requiring great clamping force, such as clamping thick-walled arteries, tough fibrous tissue, ligaments, or operating on tubular tissues (such as bile ducts under treatment) with extremely smooth, moist surfaces that are prone to slippage.

[0056] In a preferred embodiment, the support portion 201 is formed with an obtuse angle (i.e., greater than 90 degrees) relative to its corresponding second clamping arm 2; and / or the pressing portion 101 is also formed with an obtuse angle relative to its corresponding first clamping arm 1.

[0057] The obtuse-angled bending structure creates a gentle arc or slope in the transition area from the clamping arm to the compression part 101 / support part 201. When the vascular clamp closes, the vascular tissue is gently guided along this gentle slope and placed between the clamping surfaces, rather than being abruptly squeezed to a sharp corner, thereby greatly reducing local pressure and effectively preventing physical damage to the vascular adventitia.

[0058] In a preferred embodiment, when the vascular clamp is in a fully closed state, the projection point of the vertex of the bending angle of the compression part 101 (i.e. the highest point of the bending arc of the compression part 101) on the direction perpendicular to the support surface 2011 of the support part 201 falls on the center line of the support surface 2011 along its length direction.

[0059] In detail, ideally, when a blood vessel or other tubular tissue is clamped, it should be subjected to equal pressure from both sides. If the apex of the compression portion 101 deviates from the midline of the support surface 2011 in projection, then when the vascular clamp closes, the main pressure applied to the blood vessel will be an eccentric force. This eccentric force will inevitably generate a torque, causing the blood vessel to twist or shift to one side while being clamped. However, the clamping force is symmetrically distributed on both sides of the blood vessel, eliminating any torsional or shear force components, thus ensuring uniform clamping of the blood vessel.

[0060] like Figures 4 to 5 As shown, in a preferred embodiment, the inner surface of the pressing part 101 is provided with at least two (e.g., two or more) constraint grooves 502 distributed along the length direction of the clamping arm. Correspondingly, on the supporting surface 2011 of the supporting part 201, there are constraint protrusions 501 that match the positions of the constraint grooves 502.

[0061] When the vascular clamp closes, and the supporting part 201 and the compression part 101 come into contact or approach each other, the constraint protrusion 501 will be embedded into the constraint groove 502, forming a coupling or interlocking relationship.

[0062] In certain special cases, such as when dealing with large arteries with extremely high internal pressure, or when surgical instruments are accidentally bumped or dragged during surgery, relying solely on static friction may pose a risk of instantaneous breach. When the restraining protrusion 501 is embedded in the restraining groove 502, the two form a mechanical interlock. At this point, even if a huge longitudinal slippage force acts on the blood vessel, this force will be directly blocked by the sidewalls of the restraining protrusion 501 and the restraining groove 502. The vascular tissue is firmly anchored within the space formed by the groove and the protrusion, and there is absolutely no possibility of longitudinal relative sliding unless physical damage to the structure occurs.

[0063] In a preferred embodiment, the first clamping arm 1 and the second clamping arm 2 are pivotally connected to each other at their bases (i.e., at the end away from the aforementioned pressing part 101 and supporting part 201) via a pivot. The pivot can be a pin, a rivet, or an integrally formed pivot structure.

[0064] This pivotal connection structure allows the first clamping arm 1 and the second clamping arm 2 to rotate in a controlled angular direction around the pivot, much like scissors or surgical forceps. When the operator applies a force to the base of the clamping arms to bring them closer together, the distal pressing part 101 and the supporting part 201 also move closer together synchronously, performing a clamping action; conversely, when a force is applied to separate them, the distal functional parts open, performing a release action.

[0065] In a preferred embodiment, the distal compression portion 101 and the supporting portion 201 of the vascular clamp of this invention are closed in the natural state. To enable clinical operation of the vascular clamp (i.e., opening, placing, and releasing), the preferred embodiment of this invention provides a coupling interface at its base. This interface works in conjunction with the external operating component 6, and the specific operation process is as follows:

[0066] The operator first uses an external operating component 6 (e.g., a clamp from the prior art) to engage its working end with the coupling interface of the vascular clamp base. This coupling interface can be a conventional structure in the art, such as a groove, bayonet, or through-hole, to ensure that the external operating component 6 can stably grip the bases of the two clamping arms of the vascular clamp. Subsequently, the operator drives the external operating component 6 to apply a force to the clamping arm bases, bringing them closer together. This force overcomes the preset elasticity of the spring element inside the vascular clamp, thereby forcibly expanding the distal compression portion 101 and the support portion 201 to the desired width.

[0067] While maintaining the open position, the operator moves the vascular clamp to the target vessel location using the external operating component 6. After positioning, the operator slowly releases the opening force of the external operating component 6. As the external force decreases, the elastic restoring force of the spring element inside the vascular clamp (such as the torsion spring at the pivot) becomes dominant, smoothly and continuously driving the compression part 101 and the support part 201 to close.

[0068] Once the blood vessel is reliably clamped, the external operating component 6 can be unlocked and completely separated from the coupling interface at the base of the blood vessel clamp, and withdrawn from the operating area.

[0069] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vascular clamp that prevents blood vessel puncture and retention, characterized in that, include: The first clamping arm and the second clamping arm are respectively provided with a pressing part and a supporting part at their ends; The compression portion extends from the end of its corresponding first clamping arm and bends toward the second clamping arm; The supporting portion extends from the end of its corresponding second clamping arm and bends toward the first clamping arm; Furthermore, the first clamping arm and the second clamping arm have a length difference, so that the pressing part and the supporting part can interlock with each other in a staggered manner to form a clamping state with at least two locking points; Furthermore, the first clamping arm and / or the second clamping arm are provided with a preset elastic arm segment, which undergoes elastic deformation when the vascular clamp is closed.

2. The vascular clamp for preventing vascular puncture and retention according to claim 1, characterized in that, The supporting part includes a supporting surface, and the two side edges of the supporting surface form at least two locking points when they engage with the pressing part.

3. The vascular clamp for preventing vascular puncture and retention according to claim 2, characterized in that, The supporting surface of the supporting part has a flat, blunt, toothless structure.

4. The vascular clamp for preventing vascular puncture and retention according to claim 2, characterized in that, The supporting surface of the supporting part or the contact surface of the pressing part is provided with a toothed structure.

5. The vascular clamp for preventing vascular puncture and retention according to claim 3 or 4, characterized in that, The supporting portion is formed by bending at an obtuse angle relative to its corresponding second clamping arm; And / or the compression portion is formed by bending at an obtuse angle relative to its corresponding first clamping arm.

6. The vascular clamp for preventing vascular puncture and retention according to claim 2, characterized in that, When the vascular clamp is in the closed state, the vertex of the bending angle of the compression part is projected vertically onto the supporting surface, and the projection point is located on the centerline of the supporting surface.

7. The vascular clamp for preventing vascular puncture and retention according to claim 1, characterized in that, The supporting portion has at least two constraint protrusions; The pressing part is provided with a constraint groove corresponding to the constraint protrusion; When the supporting part contacts the pressing part, the constraint protrusion couples with the constraint groove.

8. The vascular clamp for preventing vascular puncture and retention according to claim 1, characterized in that, The bases of the first and second clamping arms are pivotally connected to each other, forming a pivot.

9. The vascular clamp for preventing vascular puncture and retention according to claim 8, characterized in that, The base is also provided with a coupling interface for receiving an external operating element to drive the first clamping arm and the second clamping arm to rotate about the pivot.

10. The vascular clamp for preventing vascular puncture and retention according to claim 1, characterized in that, The elastic arm segment is a locally thinned area, S-shaped bending area, or slotted area integrally formed on the first clamping arm and / or the second clamping arm.

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