Blood vessel closing cutter and using method thereof

Abstract

The invention discloses a blood vessel closing cutter and a using method thereof, and relates to the technical field of radio frequency closing cutting surgical instruments, the blood vessel closing cutter sequentially comprises a forceps head, a cutter tube and an operating handle, the cutter tube is sleeved with and movably connected with a moving ring, the moving ring axially extends in the length direction of the cutter tube, and the moving ring is coaxially sleeved with and in threaded connection with a locking lantern ring; the locking lantern ring is rotated so that the locking lantern ring can move relative to the moving ring in the axial direction of the moving ring, and the moving ring is in clearance fit with the knife tube; a ball and a locking block are slidably connected into the moving ring and slide in the radial direction of the moving ring, the moving directions of the ball and the locking block are opposite, and one end of the locking block and the ball can make contact with the outer wall of the knife tube after sliding. The locking lantern ring drives the locking block to move through the second linkage assembly, and when the locking block moves, the first linkage assembly drives the ball to move reversely. The device has the effect of improving the cutting operation quality.

Description

Technical Field

[0001] The present application relates to the technical field of radio frequency sealing and cutting surgical instruments, and in particular to a blood vessel sealing cutter and a method for using the same. Background Art

[0002] Among radiofrequency closed cutting surgical instruments, "LigaSure" refers to a specific vascular closed cutting instrument, which generally includes an operating handle, a knife tube and a movable forceps head. There is a blade inside the knife tube for cutting the tissue clamped by the forceps head. The movable forceps head is used to clamp the organs or blood vessels that need to be removed. The electrode inside the movable forceps head can use electrical energy and pressure to liquefy and reorganize the collagen and elastin in the blood vessel wall, so that the collagen and fibrin in the human tissue melt and denature, and the blood vessel wall fuses to form a transparent band, resulting in permanent lumen closure to provide hemostasis. Therefore, it is widely used in laparoscopic and open tumor surgery.

[0003] This type of vascular closure and cutting instrument is usually used together with a peritoneal puncture device. During the actual operation, one end of the puncture device is inserted into the human body to establish a surgical channel, and then the forceps head of the vascular closure and cutting instrument is extended into the patient's abdominal cavity through the puncture knife tube at one end of the puncture device. This allows for minimally invasive intervention on the human body and reduces the patient's postoperative pain.

[0004] However, during the actual operation, the surgical instruments are always in a suspended and moving state. The surgeon's hands will inevitably experience soreness and tremors after a long operation. Since the surgical instruments have no fulcrum, the surgeon's hand tremors may cause the surgical instruments to shake, resulting in movement of the forceps head, thus affecting the final quality of the operation. Summary of the invention

[0005] In order to improve the situation where the surgeon's hands holding the surgical instruments are prone to trembling due to pain during a long operation, which affects the final quality of the operation, the present application provides a blood vessel closing cutter and a method of using the same.

[0006] On the one hand, the present application provides a blood vessel sealing cutter, which adopts the following technical solution: A blood vessel closing cutter comprises a clamp head, a knife tube and an operating handle in sequence, wherein a movable ring is disposed on the outer surface of the knife tube and movably connected thereto, wherein the movable ring axially extends along the length direction of the knife tube and reciprocates along the length direction of the knife tube, wherein a locking collar is coaxially disposed on the outer surface of the movable ring and threadedly connected thereto, wherein the locking collar is rotated so that the locking collar can move relative to the movable ring along the axial direction of the movable ring, and a clearance fit is formed between the movable ring and the knife tube; A ball and a locking block are slidably connected in the movable ring, and the ball and the locking block are distributed at intervals along the axial direction of the movable ring. The ball and the locking block both slide in the radial direction of the movable ring, and the moving directions of the ball and the locking block are opposite. One end of the locking block and the ball can contact the outer wall of the knife tube after sliding. A first linkage component and a second linkage component are also provided in the movable ring. When the locking collar moves relative to the movable ring, the locking collar drives the locking block to move through the second linkage component, and when the locking block moves, the ball is driven to move in the opposite direction through the first linkage component.

[0007] Optionally, the first linkage assembly includes a linkage gear, a first rack, and a second rack. The second rack is parallel to the locking block. One end of the second rack is rollingly connected to the ball. The first rack is arranged on the side of the locking block close to the ball. The linkage gear is located between the first rack and the second rack, and is meshed with the first rack and the second rack at the same time. The linkage gear is rotatably connected in the movable ring.

[0008] Optionally, a movable groove is provided on the outer wall of the knife tube, and the ball rolls in the movable groove.

[0009] Optionally, an anti-skid pad is provided at one end of the locking block, and the anti-skid pad is used to contact the outer wall of the knife tube to limit the sliding of the moving ring.

[0010] Optionally, a return member is provided at one end of the movable ring corresponding to the locking block provided with an anti-slip pad, and the return member is arranged parallel to the locking block, one end of the return member abuts against the side wall of the locking block, and the other end abuts against the inner wall of the movable ring.

[0011] Optionally, the second linkage assembly includes a first wedge block and a second wedge block in contact with each other, the first wedge block is fixed to the locking block near one end of the locking ring, the second wedge block is connected to the locking ring and can move axially along the moving ring with the locking ring, the wedge surface of the first wedge block is in contact with the wedge surface of the second wedge block, and the distance between the wedge surface of the first wedge block and the locking ring gradually decreases along the direction from the operating handle to the pliers head, and the inclination direction of the wedge surface of the second wedge block is opposite to that of the wedge surface of the first wedge block.

[0012] Optionally, a connecting piece is provided in the locking ring, one end of the connecting piece is slidably connected to the locking ring, and the other end is fixedly connected to the second wedge block, and a sliding groove for the connecting piece to move is provided on the side wall of the moving ring corresponding to the position of the connecting piece, and the sliding groove is opened along the axis of the moving ring.

[0013] Optionally, buffer pads are provided at both axial ends of the movable ring, and the buffer pads are made of soft material.

[0014] On the other hand, the present application provides a method for using a blood vessel sealing cutter, using any of the blood vessel sealing cutters described above to perform surgery, comprising the following steps: S1: When the cutting part needs to be fixed, the locking collar is rotated, and the end of the locking block is separated from the outer wall of the knife tube, and the ball contacts the outer wall of the knife tube, unlocking the moving ring, and applying external force to drive one end of the moving ring to move to abut against the end of the puncture knife tube on the puncture device; S2: After the position of the moving ring is determined, the locking collar is rotated in the opposite direction. At this time, one end of the locking block is pressed against the outer wall of the knife tube, and the ball is separated from the outer wall of the knife tube, thereby locking the position of the moving ring; S3: After the operation, rotate the locking collar again to unlock the moving ring, move the moving ring to the initial position, and then rotate the locking collar in the opposite direction to fix the moving ring on the knife tube.

[0015] In summary, this application has the following beneficial effects: A movable moving ring is provided on the original knife tube of the blood vessel closing cutter, and a ball is provided in the moving ring. After the ball contacts the outer wall of the knife tube, it is convenient to move the moving ring, thereby facilitating the adjustment of the position of the moving ring on the knife tube. At the same time, a locking block is also provided in the moving ring. Rotating the locking collar can drive one end of the locking block to press against the outer wall of the knife tube, thereby fixing the moving ring at a certain position on the knife tube. When the doctor's hands are sore due to long-term surgery, external force can be applied to drive the moving ring to press against the end of the puncture knife tube on the puncture device, and then the locking collar is rotated to lock the position of the moving ring. The moving ring presses against the puncture knife tube, which can provide a reliable fulcrum for the blood vessel closing cutter, and make the position of the clamp head in the patient's body relatively fixed, which can provide good stability for the doctor when operating the blood vessel closing cutter, thereby improving the quality of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram showing the overall structure of the blood vessel sealing cutter in Example 1 of the present application; Figure 2 yes Figure 1 An enlarged schematic diagram at A; Figure 3 yes Figure 2 A schematic cross-sectional view at BB; Figure 4 It is a partial cross-sectional schematic diagram showing the internal structure of the moving ring in Example 1 of the present application.

[0017] Explanation of the accompanying drawings: 1. pliers head; 2. knife tube; 21. moving groove; 3. operating handle; 4. moving ring; 41. ball; 42. locking block; 43. anti-slip pad; 44. linkage gear; 45. first rack; 46. second rack; 47. first wedge block; 48. second wedge block; 49. slide groove; 5. locking ring; 51. connecting piece; 6. return piece; 7. buffer pad. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-4 This application is described in further detail. Example 1

[0019] Embodiment 1 of the present application discloses a blood vessel sealing cutter, referring to Figure 1 The blood vessel closing cutter comprises a forceps head 1, a knife tube 2 and an operating handle 3 in sequence. The knife tube 2 connects the forceps head 1 and the operating handle 3 together. The knife tube 2 also has a blade for cutting tissues or blood vessels. The doctor can hold the operating handle 3 to perform surgery on the patient.

[0020] Reference Figure 2 and Figure 3 The knife tube 2 is provided with a moving ring 4, which is coaxially sleeved outside the knife tube 2, and the moving ring 4 and the knife tube 2 are matched with each other in a clearance, so that the moving ring 4 can reciprocate along the length direction of the knife tube 2. A rolling ball 41 is arranged inside the moving ring 4, and the ball 41 contacts the outer wall of the knife tube 2 and can roll along the outer wall of the knife tube 2. The outer wall of the knife tube 2 is stamped with two moving grooves 21, and the moving grooves 21 are arranged along the length direction of the knife tube 2, and the moving grooves 21 are symmetrically distributed relative to the axis of the knife tube 2. The ball 41 rolls in the moving grooves 21 accordingly. The matching of the moving grooves 21 and the ball 41 can limit the rotation of the moving ring 4 relative to the knife tube 2, and can ensure the linear movement of the moving ring 4 relative to the knife tube 2. The doctor can apply external force to the moving ring 4 according to the surgical requirements, so as to adjust the position of the moving ring 4 on the knife tube 2.

[0021] Reference Figure 3 and Figure 4In order to limit the position of the moving ring 4 on the knife tube 2, a locking block 42 is also provided in the moving ring 4. The locking block 42 is slidably connected in the moving ring 4, and the locking block 42 slides along the radial direction of the moving ring 4, so that one end of the locking block 42 can be pressed against the outer wall of the knife tube 2, thereby limiting the movement of the moving ring 4 relative to the knife tube 2. There can be two locking blocks 42, and the two locking blocks 42 are symmetrically distributed on both sides of the knife tube 2, so that the two locking blocks 42 can clamp the knife tube 2 from both sides at the same time, further limiting the movement of the moving ring 4 relative to the knife tube 2, so that the moving ring 4 is stably fixed at a certain point of the knife tube 2; at the same time, there can be four groups of balls 41, and the four groups of balls 41 are symmetrically distributed on both sides of the knife tube 2, and correspond to the positions of the locking blocks 42, and the two groups of balls 41 on the same side are symmetrically located on both sides of the locking blocks 42, and are spaced apart from the locking blocks 42.

[0022] In order to further increase the friction between the locking block 42 and the outer wall of the knife tube 2, an anti-skid pad 43 is fixed to one end of the locking block 42. The anti-skid pad 43 can be made of rubber or silicone material with an anti-skid texture on the surface. After the anti-skid pad 43 contacts the outer wall of the knife tube 2, it can provide greater friction, thereby further limiting the sliding of the movable ring 4.

[0023] A first linkage assembly is provided between the locking block 42 and the ball 41 , and the locking block 42 realizes reverse movement with the ball 41 through the first linkage assembly, so that the locking block 42 and the ball 41 can contact the outer wall of the knife tube 2 respectively.

[0024] Specifically, the first linkage assembly includes a linkage gear 44, a first rack 45, and a second rack 46, wherein the second rack 46 is parallel to the locking block 42, the second rack 46 corresponds to the ball 41 one by one, and one end of each second rack 46 is rollingly connected to the corresponding ball 41, and the second rack 46 is slidingly connected to the moving ring 4 along the radial direction of the moving ring 4. The first rack 45 is fixed to both sides of the locking block 42 close to the ball 41, and there are two linkage gears 44 located on the same side, and they are respectively located between the first rack 45 and the second rack 46, and the linkage gear 44 is meshed with the first rack 45 and the second rack 46 corresponding to the upper and lower parts at the same time, and the linkage gear 44 is rotatably connected to the moving ring 4.

[0025] When the locking block 42 moves, it can drive the two first racks 45 thereon to slide synchronously. When the two first racks 45 slide, the two second racks 46 are driven to move through the two interlocking gears 44 meshing therewith. At this time, the two second racks 46 on the same side move synchronously and in the same direction, and the second racks 46 and the locking block 42 move in opposite directions. The ball 41 moves with the second rack 46 corresponding to itself, so that the ball 41 and the locking block 42 on the same side move in opposite directions, so that the locking block 42 and the ball 41 are respectively in contact with the outer wall of the knife tube 2. When the ball 41 contacts the outer wall of the knife tube 2, the moving ring 4 is allowed to move, and when the locking block 42 contacts the outer wall of the knife tube 2, the position of the moving ring 4 is locked.

[0026] Therefore, during the operation, the position of the movable ring 4 can be flexibly adjusted as needed. The movable ring 4 abuts against the end of the puncture blade tube 2 on the puncture device, providing a fulcrum for the blood vessel closing cutter held by the doctor, ensuring the stability of the blade tube 2 and the accuracy of the operation.

[0027] To facilitate the movement of the locking block 42, a second linkage assembly is also provided inside the movable ring 4, and a locking collar 5 is coaxially sleeved and threadedly connected outside the movable ring 4. The locking collar 5 is rotated so that the locking collar 5 can move relative to the movable ring 4 along the axial direction of the movable ring 4. The locking collar 5 drives the locking block 42 to move through the second linkage assembly.

[0028] Specifically, refer to Figure 1 and Figure 4 The second linkage assembly includes a first wedge 47 and a second wedge 48 that are in contact with each other. Both the first wedge 47 and the second wedge 48 have wedge surfaces, and the wedge surfaces of the first wedge 47 and the second wedge 48 are in contact with each other. The first wedge 47 is fixed to one end of the locking block 42 close to the locking collar 5. The second wedge 48 is connected to the locking collar 5 and can move axially along the moving ring 4 with the locking collar 5. Along the direction from the operating handle 3 to the pliers head 1, the distance between the wedge surface of the first wedge 47 and the locking collar 5 gradually decreases, and the inclination direction of the wedge surface of the second wedge 48 is opposite to that of the wedge surface of the first wedge 47.

[0029] Furthermore, a connecting piece 51 is provided in the locking collar 5, one end of the connecting piece 51 is slidably connected to the locking collar 5, and the other end is fixedly connected to the side wall of the second wedge block 48 away from its own wedge surface. A sliding groove 49 for the connecting piece 51 to move is provided on the side wall of the moving ring 4 corresponding to the position of the connecting piece 51, and the sliding groove 49 is opened along the axial direction of the moving ring 4, and the connecting piece 51 is slidably connected in the sliding groove 49.

[0030] The connecting piece 51 is slidably connected to the locking collar 5, so that the connecting piece 51 does not rotate along with the locking collar 5 when the locking collar 5 rotates. When the locking collar 5 rotates, it will move axially along the movable ring 4. At this time, the connecting piece 51 follows the locking collar 5 to move axially along the movable ring 4, and the connecting piece 51 drives the second wedge block 48 connected thereto to move axially along the movable ring 4. After the second wedge block 48 moves, the first wedge block 47 is driven to move radially along the movable ring 4 through the wedge surface, so that the locking block 42 moves toward the outer wall of the knife tube 2 until the locking block 42 is against the outer wall of the knife tube 2, thereby achieving the purpose of limiting the movement of the movable ring 4 by the locking block 42.

[0031] In order to facilitate the locking block 42 to retract into the moving ring 4, thereby unlocking the moving ring 4, a return member 6 is provided at one end of the moving ring 4 corresponding to the anti-slip pad 43 provided on the locking block 42. The return member 6 can be a compression spring. The return member 6 is arranged parallel to the locking block 42, and one end of the return member 6 abuts against the side wall of the locking block 42, and the other end abuts against the inner wall of the moving ring 4. When the locking block 42 moves toward the outer wall of the knife tube 2, the return member 6 is compressed to generate a return force. When the moving ring 4 needs to be unlocked, the locking collar 5 is rotated in the opposite direction. The return force generated by the return member 6 pushes the locking block 42 to retract inward into the moving ring 4, and the ball 41 is synchronously extended and contacts the outer wall of the knife tube 2. At this time, applying an external force to the moving ring 4 can drive the moving ring 4 to move, so that the position of the moving ring 4 can be adjusted conveniently.

[0032] Buffer pads 7 are fixed at both axial ends of the movable ring 4. The buffer pads 7 are made of soft materials, specifically rubber or silicone. When the position of the forceps head 1 needs to be relatively fixed and a fulcrum is provided for the doctor's hand holding the cutter, the buffer pad 7 can directly abut against the end of the puncture catheter. At this time, the position of the forceps head 1 in the patient's body is relatively fixed, and the doctor can directly rely on the fixed movable ring 4 to reduce the shaking of the hand, thereby improving the quality of the operation.

[0033] The implementation principle of a blood vessel closing cutter in Example 1 of the present application is as follows: when the doctor's hands are sore due to a long operation, an external force can be applied to drive the movable ring 4 to abut against the end of the puncture knife tube 2 on the puncture device, and then the locking ring 5 is rotated. The locking ring 5 drives the locking block 42 to move close to the outer wall of the knife tube 2 through the fitted first wedge block 47 and the second wedge block 48 until it is tightly against the outer wall of the knife tube 2, thereby completing the position locking of the movable ring 4. The movable ring 4 abuts against the puncture knife tube 2, which can provide a reliable fulcrum for the blood vessel closing cutter, thereby making the position of the clamp head 1 in the patient's body relatively fixed. Example 2

[0034] Embodiment 2 of the present application discloses a method for using a blood vessel sealing cutter, wherein the blood vessel sealing cutter in Embodiment 1 is used to perform surgery, including the following steps: S1: When the cutting part needs to be fixed, the locking collar 5 is rotated, and the anti-skid pad 43 on the locking block 42 is separated from the outer wall of the knife tube 2, and the ball 41 moves in the opposite direction and contacts the outer wall of the knife tube 2, unlocking the moving ring 4, and applying external force to drive one end of the moving ring 4 to move to abut against the end of the puncture knife tube 2 on the puncture device; S2: After the position of the moving ring 4 is determined, the locking collar 5 is rotated in the opposite direction. At this time, the anti-skid pad 43 on the locking block 42 is pressed against the outer wall of the knife tube 2, and the ball 41 is separated from the outer wall of the knife tube 2, thereby locking the position of the moving ring 4; S3: After the operation is completed, the locking collar 5 is rotated again to unlock the movable ring 4. After the movable ring 4 is moved to the initial position, the locking collar 5 is rotated in the reverse direction to fix the movable ring 4 on the knife tube 2.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A blood vessel sealing cutter, comprising a clamp head, a knife tube and an operating handle in sequence, characterized in that: A moving ring is disposed on the outer surface of the knife tube and movably connected thereto. The moving ring axially extends along the length direction of the knife tube and reciprocates along the length direction of the knife tube. A locking collar is coaxially disposed on the outer surface of the moving ring and threadedly connected thereto. The locking collar is rotated so that the locking collar can move relative to the moving ring along the axial direction of the moving ring. There is a clearance fit between the moving ring and the knife tube. A ball and a locking block are slidably connected in the movable ring, and the ball and the locking block are distributed at intervals along the axial direction of the movable ring. The ball and the locking block both slide in the radial direction of the movable ring, and the moving directions of the ball and the locking block are opposite. One end of the locking block and the ball can contact the outer wall of the knife tube after sliding. A first linkage component and a second linkage component are also provided in the movable ring. When the locking collar moves relative to the movable ring, the locking collar drives the locking block to move through the second linkage component, and when the locking block moves, the ball is driven to move in the opposite direction through the first linkage component.

2. The blood vessel sealing cutter according to claim 1, characterized in that: The first linkage assembly includes a linkage gear, a first rack, and a second rack. The second rack is parallel to the locking block. One end of the second rack is rollingly connected to the ball. The first rack is arranged on the side of the locking block close to the ball. The linkage gear is located between the first rack and the second rack, and is meshed with the first rack and the second rack at the same time. The linkage gear is rotatably connected in the moving ring.

3. The blood vessel sealing cutter according to claim 1, characterized in that: A moving groove is arranged on the outer wall of the knife tube, and the ball rolls in the moving groove.

4. The blood vessel sealing cutter according to claim 1, characterized in that: One end of the locking block is provided with an anti-skid pad, and the anti-skid pad is used to contact with the outer wall of the knife tube to limit the sliding of the moving ring.

5. The blood vessel sealing cutter according to claim 4, characterized in that: A return piece is arranged at one end of the movable ring corresponding to the locking block provided with an anti-slip pad, and the return piece is arranged parallel to the locking block, one end of the return piece abuts against the side wall of the locking block, and the other end abuts against the inner wall of the movable ring.

6. The blood vessel sealing cutter according to claim 1, characterized in that: The second linkage assembly includes a first wedge block and a second wedge block in contact with each other, the first wedge block is fixed to the locking block at one end close to the locking collar, the second wedge block is connected to the locking collar and can move axially along the moving ring with the locking collar, the wedge surface of the first wedge block is in contact with the wedge surface of the second wedge block, and the distance between the wedge surface of the first wedge block and the locking collar gradually decreases along the direction from the operating handle to the pliers head, and the inclination direction of the wedge surface of the second wedge block is opposite to that of the wedge surface of the first wedge block.

7. The blood vessel sealing cutter according to claim 6, characterized in that: A connecting piece is arranged in the locking collar, one end of the connecting piece is slidably connected to the locking collar, and the other end is fixedly connected to the second wedge block. A sliding groove for the connecting piece to move is provided on the side wall of the moving ring corresponding to the position of the connecting piece, and the sliding groove is opened along the axis of the moving ring.

8. The blood vessel sealing cutter according to claim 1, characterized in that: Buffer pads are arranged at both axial ends of the moving ring, and the buffer pads are made of soft material.

9. A method for using a blood vessel sealing cutter, characterized in that: The method of performing surgery using the blood vessel sealing cutter as described in any one of claims 1 to 8 comprises the following steps: S1: When the cutting part needs to be fixed, the locking collar is rotated, and the end of the locking block is separated from the outer wall of the knife tube, and the ball contacts the outer wall of the knife tube, unlocking the moving ring, and applying external force to drive one end of the moving ring to move to abut against the end of the puncture knife tube on the puncture device; S2: After the position of the moving ring is determined, the locking collar is rotated in the opposite direction. At this time, one end of the locking block is pressed against the outer wall of the knife tube, and the ball is separated from the outer wall of the knife tube, thereby locking the position of the moving ring; S3: After the operation, rotate the locking collar again to unlock the moving ring, move the moving ring to the initial position, and then rotate the locking collar in the opposite direction to fix the moving ring on the knife tube.

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