Bipolar vessel sealer with misfire prevention

Abstract

The utility model discloses a kind of bipolar blood vessel closure devices of preventing mis-cutting, including handle, jaw part, cutting part, closure trigger and swing bar, swing bar rear end is rotatably connected with handle inner cavity wall by pivot, swing bar front end is equipped with locking gap with opening downward, swing bar is also equipped with one opening slot, cutting trigger top end is equipped with the first protrusion compatible with locking gap, closure trigger top end portion is threaded the opening slot, opening slot inner wall is equipped with a guide slope, closure trigger is equipped with the second protrusion compatible with guide slope. By the above mode, the utility model can be through the mechanical interlocking cooperation between swing bar and cutting trigger, closure trigger, forcibly set first closure then cutting, only allow unlocking and carry out cutting action after jaw closure is in place, avoid the risk of blood vessel accidental cut-off caused by mis-touch cutting trigger, prevent intraoperative massive hemorrhage, greatly improve the safety and reliability of surgical operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bipolar vascular closure device to prevent accidental cutting. Background Technology

[0002] Bipolar vascular closure devices are high-frequency surgical instruments widely used in surgical procedures. They mainly consist of bipolar instruments and an energy generator. During operation, the energy generator outputs a specific form of high-frequency energy, which is applied to the blood vessel tissue through the bipolar instruments to achieve vascular closure. The instrument is also equipped with a built-in blade, which can mechanically sever the closed blood vessel tissue.

[0003] The correct operating procedure is as follows: First, move the instrument jaws to place the vascular tissue to be processed in the center area of ​​the jaws. Then, pull the closing trigger to close the jaws. At this time, the energy generator outputs high-frequency energy, which acts on the vascular tissue through the dual electrode plates in the jaws to effectively close it. After the blood vessel is completely closed, pull the cutting trigger to sever the blood vessel.

[0004] If the cutting trigger is pulled before the blood vessel is completely closed, the blood vessel will be cut off before it is completely sealed, causing a large amount of blood to gush out and resulting in massive bleeding and a serious medical accident. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a bipolar vascular closure device that prevents accidental cutting. Through the mechanical interlock between the lever, the cutting trigger, and the closing trigger, the operation sequence of "closing first, then cutting" can be forcibly set. This ensures that the device is only allowed to unlock and perform the cutting action after the jaws are fully closed, fundamentally avoiding the risk of accidental vascular severance caused by accidental triggering, significantly preventing massive intraoperative bleeding, and greatly improving the safety and reliability of surgical procedures.

[0006] To solve the above-mentioned technical problems, the present invention provides a bipolar vascular closure device to prevent accidental cutting, comprising: a handle and a jaw portion and a cutting portion located at the distal end of the handle; the handle also has a closing trigger and a cutting trigger, the closing trigger being used to drive the jaw portion to perform opening and closing actions, and the cutting trigger being used to drive the cutting portion to move back and forth to perform a cutting action; it also includes a swing arm that is linked and cooperates with the closing trigger and the cutting trigger; the rear end of the swing arm is rotatably connected to the inner wall of the handle via a pivot; the front end of the swing arm has a downward-facing locking notch; and the swing arm has an opening groove. The cutting trigger has a first protrusion at its top that matches the locking notch, the closing trigger's top portion penetrates the opening groove, the inner wall of the opening groove has a guide slope, and the closing trigger has a second protrusion that matches the guide slope. When the closed trigger is pulled, the second protrusion can slide along the guide ramp, thereby driving the lever to swing upward from the first position to the second position, causing the locking notch to disengage from the first protrusion.

[0007] In a preferred embodiment of this utility model, when the lever is in the first position, the first protrusion engages with the locking notch, and the cutting trigger is in a locked state; when the lever is in the second position, the first protrusion disengages from the locking notch, and the cutting trigger switches to an unlocked state.

[0008] In a preferred embodiment of the present invention, a return spring is provided between the swing arm and the inner cavity of the handle, with one end of the return spring abutting against the swing arm and the other end abutting against the inner wall of the handle cavity.

[0009] In a preferred embodiment of the present invention, the cross-sectional shape of the locking notch is one of V-shape, U-shape or rectangle, and the inner wall of the locking notch is provided with a transition rounded corner.

[0010] In a preferred embodiment of this invention, the cross-sectional shape of the locking notch is V-shaped.

[0011] In a preferred embodiment of the present invention, the guide slope of the inner wall of the opening groove is formed by the inner sidewall of the opening groove tilting outward, and the tilt angle of the guide slope is 15°~45°.

[0012] In a preferred embodiment of this utility model, the inclination angle of the guide slope is 30°.

[0013] In a preferred embodiment of this utility model, the swing arm is integrally stamped from a metal plate.

[0014] In a preferred embodiment of the present invention, the second protrusion on the closing trigger and the guide slope of the inner wall of the opening groove are arc-shaped contact surfaces.

[0015] In a preferred embodiment of the present invention, a limiting post is provided between the closed trigger and the handle, and the limiting post is located in the inner cavity of the handle at a position corresponding to the closing trigger's actuation path.

[0016] The beneficial effects of this invention are: by using an interlocking structure to force the operation sequence of closing before cutting, it ensures that the cutting action is only unlocked after the blood vessel is clamped, completely avoiding the risk of premature cutting caused by accidental triggering of the cutting trigger, fundamentally preventing the massive bleeding accident that may be caused by accidental severing of blood vessels, and greatly improving the safety of the surgical procedure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of a preferred embodiment of the bipolar blood vessel closure device for preventing accidental cutting in the initial locked state of this utility model. Figure 2 This is a schematic diagram of a preferred embodiment of the bipolar blood vessel closure device for preventing accidental cutting in the unlocked state of this utility model. Figure 3 This is a schematic diagram of a preferred embodiment of the closed trigger of this utility model; Figure 4 This is a schematic diagram of a preferred embodiment of the cutting trigger of this utility model; Figure 5 This is a schematic diagram of a preferred embodiment of the swing arm of this utility model; Figure 6 This is a schematic diagram of another preferred embodiment of the swing arm of this utility model; Figure 7 This is a schematic diagram of a preferred embodiment of the closed trigger, cutting trigger and swing arm of this utility model in a coordinated state; The components in the attached diagram are labeled as follows: 1. Handle, 2. Jaw, 3. Cutting part, 4. Closing trigger, 41. Second protrusion, 5. Cutting trigger, 51. First protrusion, 6. Rocker arm, 7. Pivot, 8. Locking notch, 9. Opening groove, 91. Guide slope, 10. Return spring, 11. Limiting post. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] This utility model relates to a preferred embodiment of a bipolar vascular closure device for preventing accidental cutting.

[0021] Please see Figures 1 to 7 The bipolar vascular closure device for preventing accidental cutting includes a handle 1, a jaw 2, a cutting part 3, a closing trigger 4, and a cutting trigger 5. The jaw 2 and the cutting part 3 are located at the distal end of the handle 1, and the closing trigger 4 and the cutting trigger 5 are arranged side by side on one side of the handle 1. The closing trigger 4 is used to drive the jaw 2 to perform opening and closing actions to achieve vascular clamping and fixation; the cutting trigger 5 is used to drive the cutting part 3 to move back and forth to achieve vascular cutting action.

[0022] Based on the above structure, the improvement of this utility model is that a swing arm 6 is provided to work in conjunction with the closing trigger 4 and the cutting trigger 5.

[0023] In detail, the swing arm 6 is integrally housed within the inner cavity of the handle 1, and its rear end is rotatably connected to the inner wall of the handle 1 via a pivot 7, allowing the swing arm 6 to swing up and down around the pivot 7 as a fulcrum. The swing arm 6 is integrally stamped from a metal sheet to ensure the structural strength and service life of the swing arm 6, preventing deformation or breakage after prolonged use.

[0024] First, the front end of the lever 6 is provided with a downward-facing locking notch 8, and the top of the cutting trigger 5 is integrally formed with a first protrusion 51 that matches the locking notch 8. The shape and size of the first protrusion 51 match the locking notch 8, and when the first protrusion 51 is engaged with the locking notch 8, the movement of the cutting trigger 5 is blocked.

[0025] The locking notch 8 has a cross-sectional shape of V-shape, U-shape, or rectangle, and its inner wall has a rounded corner to provide a stable and reliable locking mechanism. This ensures smooth movement when contacting and separating from the first protrusion 51, reducing wear and jamming. In this embodiment, the locking notch 8 preferably has a V-shaped cross-sectional shape.

[0026] Secondly, the lever 6 has an opening slot 9, and the top end of the closed trigger 4 passes through the opening slot 9. An outwardly inclined guide slope 91 is provided on the inner wall of the opening slot 9. Correspondingly, a second protrusion 41 adapted to the guide slope 91 is provided on the outer side of the closed trigger 4. The function of the guide slope 91 is to convert the horizontal movement of the closed trigger 4 into an upward thrust on the lever 6.

[0027] The guide ramp 91 has an inclination angle of 15° to 45° to ensure that when the trigger is closed, the second protrusion 41 can slide smoothly along the ramp and effectively drive the swing arm to swing. In this embodiment, the inclination angle of the guide ramp 91 is preferably 30°.

[0028] In this embodiment, the contact surfaces of the second protrusion 41 and the guide slope 91 are preferably arc-shaped. This surface contact method can greatly reduce the frictional resistance during sliding, avoid local stress concentration that could lead to wear or damage to the parts, and ensure a smooth operating feel.

[0029] The swing arm 6 of this invention forms a locking engagement with the first protrusion 51 of the cutting trigger 5 through the locking notch 8 to restrict the movement of the cutting trigger 5. It forms a driving engagement with the second protrusion 41 of the closing trigger 4 through the guide slope 91 of the opening groove 9. Only when the closing trigger 4 drives the jaws to close in place will the swing arm 6 release the lock on the cutting trigger 5, allowing the cutting trigger 5 to perform the cutting action.

[0030] Furthermore, a return spring 10 is provided between the swing arm 6 and the inner cavity of the handle 1. One end of the return spring 10 abuts against the swing arm 6, and the other end abuts against the inner wall of the handle 1. When the pulling force of the closed trigger 4 is lost, the return spring 10 can drive the swing arm 6 to return from the second position to the first position, so that the cutting trigger 5 is locked again.

[0031] To further ensure operational safety, this embodiment also includes a limiting post 11, which is located inside the handle 1 and corresponds to the position of the closed trigger 4 along its actuation path.

[0032] When the closing trigger 4 is pulled to its maximum stroke, the limiting post 11 can abut against the side wall of the closing trigger 4, restricting the closing trigger 4 from being pulled further, avoiding blood vessel damage caused by excessive closure of the jaws 2, and ensuring that the lever can swing stably to the second position, so as to reliably unlock the cutting trigger.

[0033] The operation process of this utility model's bipolar blood vessel closure device for preventing accidental cutting is as follows: Initial state: Under the action of the return spring 10, the rocker arm 6 is pressed into the first position, as shown below. Figure 1 As shown, at this time, the first protrusion 51 at the top of the cutting trigger 5 is precisely engaged in the locking notch 8 at the front end of the swing arm 6. Since the first protrusion 51 is restricted by the wall of the notch, the cutting trigger 5 cannot be moved inward and is in a locked state, which effectively prevents the risk of premature cutting caused by accidentally touching the cutting trigger before the blood vessel is clamped.

[0034] Unlocking process: When cutting is required, the operator first pulls the closing trigger 4 inward. As the closing trigger 4 moves inward, the second protrusion 41 on it moves accordingly and contacts the guide slope 91 in the opening slot 9. As the closing trigger 4 continues to be pulled, the second protrusion 41 slides upward along the guide slope 91, thereby driving the swing arm 6 to overcome the elastic force of the return spring 10 and swing upward around the pivot from the first position to the second position, as shown. Figure 2 As shown; When the lever 6 swings upward, the locking notch 8 at its front end also rises and completely disengages from the first protrusion 51 on the cutting trigger 5. The cutting trigger 5 then unlocks and switches to the unlocked state. At this time, the operator can smoothly pull the cutting trigger to drive the cutting part 3 to cut.

[0035] Automatic reset: After cutting is completed and the closing trigger 4 is released, the thrust acting on the swing arm 6 disappears. At this time, the elastic restoring force of the reset spring 10 drives the swing arm 6 to swing down from the second position and automatically reset to the first position. After the swing arm resets, the locking notch 8 locks the first protrusion 51 again, relocking the cutting trigger 5 and providing a safety guarantee for the next operation.

[0036] The beneficial effects of this utility model of a bipolar blood vessel closure device for preventing accidental cutting are: By utilizing the interlocking mechanism between the lever, the cutting trigger, and the closing trigger, the system achieves closure before cutting. This ensures that the closing trigger must be pulled first during the operation to close the jaws before the cutting trigger can be pulled, effectively preventing accidental cutting, greatly improving instrument safety, avoiding the risk of blood vessel severance and massive bleeding, and ensuring surgical safety.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A bipolar vascular closure device to prevent accidental cutting, comprising: The device includes a handle, a jaw portion, and a cutting portion located at the distal end of the handle. The handle also includes a closing trigger and a cutting trigger. The closing trigger drives the jaw portion to open and close, and the cutting trigger drives the cutting portion to move back and forth to perform a cutting action. The device is characterized in that... It also includes a lever that engages with the closing trigger and the cutting trigger. The rear end of the lever is rotatably connected to the inner wall of the handle via a pivot. The front end of the lever has a downward-facing locking notch, and the lever has an opening groove. The cutting trigger has a first protrusion at its top that matches the locking notch, the closing trigger's top portion penetrates the opening groove, the inner wall of the opening groove has a guide slope, and the closing trigger has a second protrusion that matches the guide slope. When the closed trigger is pulled, the second protrusion can slide along the guide ramp, thereby driving the lever to swing upward from the first position to the second position, causing the locking notch to disengage from the first protrusion.

2. The bipolar vascular closure device for preventing accidental cutting according to claim 1, characterized in that, When the lever is in the first position, the first protrusion engages with the locking notch, and the cutting trigger is in the locked state; when the lever is in the second position, the first protrusion disengages from the locking notch, and the cutting trigger switches to the unlocked state.

3. The bipolar vascular closure device for preventing accidental cutting according to claim 2, characterized in that, A return spring is provided between the swing arm and the inner cavity of the handle. One end of the return spring abuts against the swing arm, and the other end abuts against the inner wall of the handle cavity.

4. The bipolar vascular closure device for preventing accidental cutting according to claim 1, characterized in that, The locking notch has a cross-sectional shape that is V-shaped, U-shaped, or rectangular, and the inner wall of the locking notch has a transition rounded corner.

5. The bipolar vascular closure device for preventing accidental cutting according to claim 4, characterized in that, The cross-sectional shape of the locking notch is V-shaped.

6. The bipolar vascular closure device for preventing accidental cutting according to claim 1, characterized in that, The guide slope of the inner wall of the opening groove is formed by the inner sidewall of the opening groove tilting outward, and the tilt angle of the guide slope is 15°~45°.

7. The bipolar vascular closure device for preventing accidental cutting according to claim 6, characterized in that, The inclination angle of the guide ramp is 30°.

8. The bipolar vascular closure device for preventing accidental cutting according to claim 1, characterized in that, The swing arm is formed by one-piece stamping of a metal plate.

9. The bipolar vascular closure device for preventing accidental cutting according to claim 1, characterized in that, The second protrusion on the closed trigger and the guide slope of the inner wall of the opening groove have an arc-shaped contact surface.

10. The bipolar vascular closure device for preventing accidental cutting according to claim 1, characterized in that, A limiting post is provided between the closed trigger and the handle, and the limiting post is located in the inner cavity of the handle at the position corresponding to the closing trigger's actuation path.

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