Ureter cold knife tool under laparoscope

Abstract

The utility model relates to the field of ureter cold knives, in particular to a ureter cold knife tool under a laparoscope, which comprises a shaft rod provided with a through axial channel, a cutter operating rod and a gripper operating rod which can axially move are arranged in the axial channel, and the same ends of the cutter operating rod and the gripper operating rod extend out of the axial channel and can be controlled. The other end of the cutter operating rod is connected with a blade, the other end of the gripper operating rod is connected with two grippers symmetrically arranged on the two sides of the blade, and cooling water circularly flows in the cutter operating rod, so that the temperature of the blade is reduced. According to the embodiment of the utility model, the ureter is gripped by the gripper, and meanwhile, the cooled blade extends to a target position to perform cutting action, so that the ureter is cut by using the cold knife, and the ureter is prevented from sliding during cutting.

Description

Technical Field

[0001] The utility model relates to the field of ureteral cold knife, in particular to a laparoscopic ureteral cold knife tool. Background Art

[0002] During laparoscopic surgery, especially when cutting the narrow section of the ureter, traditional laparoscopic ureterotomes (such as EP3884842A1, CN115137472A, CN114831722A) have the problem of being unable to fix the free ureter, resulting in the ureter being easy to slip when cutting the narrow section, uneven cutting edges, and requiring multiple cuts, which affects the postoperative healing effect and increases the risk of complications.

[0003] Therefore, there is an urgent need for a cutting tool that can stably fix the ureter during laparoscopic surgery to improve the accuracy and efficiency of the surgery and reduce damage to the patient. Utility Model Content

[0004] The utility model aims to provide a laparoscopic ureteral cold knife tool, which aims to solve the problem that the ureter is easy to slide when the traditional surgical instrument cuts the narrow section of the ureter due to the free ureter.

[0005] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0006] A laparoscopic ureteral cold knife tool comprises a shaft having an axial passage through which a cutter operating rod and a gripper operating rod capable of axial movement are arranged in the axial passage, the same end of the cutter operating rod and the gripper operating rod protrudes out of the axial passage and can be manipulated, the other end of the cutter operating rod is connected to a blade, and the other end of the gripper operating rod is connected to two grippers symmetrically arranged on both sides of the blade;

[0007] The two grippers extend out of the axial passage or partially retract into the axial passage under the axial action of the gripper operating rod, so that the two grippers open when extending and close when retracting to grasp the ureter;

[0008] The blade extends out of the axial channel or retracts into the axial channel under the axial action of the cutter operating rod, and the blade can be operated to extend to the target position to perform cutting action when the gripper grasps the ureter;

[0009] A cooling water channel is provided inside the cutter operating rod, and the cooling water channel is used to guide cooling water to circulate inside the cutter operating rod to reduce the temperature of the blade.

[0010] Furthermore, the gripper comprises a gripper arm, and the two gripper arms are connected to the gripper operating rod via a transmission mechanism;

[0011] The transmission mechanism comprises a spur rack, a shaft head and an arc-shaped rack;

[0012] The spur rack is arranged inside the axial channel, connected to the shaft rod in an axially movable manner, and fixedly connected to the gripper operating rod, and slides along the axis of the shaft rod when driven by the gripper operating rod; the two shaft heads are fixedly connected to the shaft rod, and a convex surface in the shape of a fan ring is formed on the side of the gripper arm and protrudes toward the spur rack;

[0013] One end of the arc-shaped rack is fixedly connected to the gripping arm, and the other end has a spherical surface that matches the convex surface and a tooth surface that meshes with the spur rack. The arc-shaped rack can rotate around the axis of the convex surface under the telescopic action of the spur rack, thereby driving the gripping arm to perform an opening and closing action.

[0014] Furthermore, the gripping arm is made of a flexible material.

[0015] Furthermore, the blade is movably embedded in the spur rack, the cutter operating rod is coaxially inserted in the gripper operating rod, and the blade slides along the axis of the shaft when driven by the cutter operating rod.

[0016] Furthermore, the cutter operating rod is a flat rectangular shape, the blade is a flat sheet with a blade on one side, the width direction of the blade is perpendicular to the width direction of the cutter operating rod, and a cross-shaped groove is formed in the straight rack to slide with the blade and the cutter operating rod.

[0017] Furthermore, a cooling water inlet is provided on one side of the cutter operating rod away from the blade, and the cooling water inlet is connected to the output end of the cooling water circulation system;

[0018] A cooling water outlet is arranged on the other side of the cutter operating rod away from the end of the blade, and the cooling water outlet is connected to the input end of the cooling water circulation system.

[0019] Furthermore, one end of the shaft is fixedly connected to a handle, and the handle is columnar and convenient for the operator to grasp with the palm of his hand.

[0020] Furthermore, one end of the grip operating rod is fixedly connected to a ring, which is shaped to facilitate the operator's index finger and middle finger to be inserted therein, and the ring is arranged on the side of the handle. The ring enables the operator to push and pull the grip operating rod forward and backward, thereby controlling the opening and closing of the grip.

[0021] Furthermore, the cutter operating lever further comprises a finger pressing portion, which is arranged at the position where the operator's thumb is located when the operator's palm is against the handle and the operator's index finger and middle finger are inserted into the ring.

[0022] Furthermore, the shaft rod is connected to the cutter operating rod and / or the gripper operating rod through an elastic connecting piece, and the elastic connecting piece is used to provide an elastic force to the cutter operating rod and / or the gripper operating rod to move toward the operator when there is no external force, so that the blade remains in a retracted position and the gripper remains in a closed position.

[0023] Compared with the prior art, this application has the following beneficial effects:

[0024] Provided is a laparoscopic ureteral cold knife tool, which not only has a cutting knife part for cutting the ureter, but also has a gripper part for grasping and fixing the ureteral stenosis before cutting the ureteral stenosis, so as to avoid the ureter from sliding during cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0027] Figure 2 A three-dimensional diagram of a working state of a cutting part of an embodiment of the utility model;

[0028] Figure 3 A three-dimensional diagram of another working state of the cutting part of an embodiment of the utility model;

[0029] Figure 4 A top view of an embodiment of the utility model;

[0030] Figure 5 for Figure 4 Cross-sectional view in the AA direction;

[0031] Figure 6 for Figure 5 A local enlarged view of point B;

[0032] Figure 7 It is an assembly diagram of an embodiment of the utility model;

[0033] Figure 8 It is a 3 / 4 cross-sectional view of the local structure of the utility model;

[0034] The numbers in the figure represent the following:

[0035] 1-shaft rod; 2-gripper part; 21-straight rack; 211-cross-shaped slide; 22-shaft head; 23-arc-shaped rack; 24-gripper arm; 25-gripper; 3-cutter part; 31-blade; 32-cooling water path; 321-inflow water path; 322-outflow water path; 33-cooling water inlet; 34-cooling water outlet; 4-operating part; 41-handle; 42-cutter operating lever; 421-finger pressure part; 43-gripper operating lever; 431-ring; 44-elastic connector; 441-guide rod; 442-guide seat; 443-spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] People need a cutting tool that can stably fix the ureter during laparoscopic surgery to improve the accuracy and efficiency of the surgery and reduce damage to the patient. Based on the above purpose, this embodiment provides a laparoscopic ureteral cold knife tool, which is designed to fix the ureteral stenosis before cutting the ureteral stenosis to avoid ureteral slippage when cutting the stenosis.

[0038] Figure 1 A stereoscopic image of the laparoscopic ureteral cold knife tool was shown. Figure 8 This is the 3 / 4 cross-sectional view that best reflects the design key points of the laparoscopic ureteral cold knife tool. Figure 1 , Figure 8 .

[0039] The laparoscopic ureteral cold knife tool includes a shaft 1, one end of which is connected to a cutting portion, and the other end is connected to an operating portion 4, and the operating portion 4 is used to be operated to move the shaft 1 inside the laparoscope, so that the cutting portion is close to the cut part to perform the cutting operation.

[0040] Among them, the cutting part includes a gripper part 2 and a cutter part 3. The gripper part 2 is used to grip the ureteral stenosis section before the cutter part 3 works to prevent the ureteral stenosis section from sliding when the cutter part 3 works. The cutter part 3 is used to cut the part gripped by the gripper part 2. The operating part 4 includes a handle 41, a cutter operating rod 42 and a gripper operating rod 43. The handle 41 is used for the operator to hold to control the direction and position of the shaft 1. The cutter operating rod 42 is used to operate the cutter part 3. The gripper operating rod 43 is used to operate the gripper part 2.

[0041] Figure 2 , Figure 3 Two different working conditions of the cutting part are shown respectively, combined with Figure 2 , the gripper part 2 is in an open state, and the cutter part 3 is in a retracted state. This working condition is used for the operator to select the part to be cut to perform the gripping and fixing operation. Figure 3 , the gripper portion 2 is in a closed state, and the cutter portion 3 is in an extended state. This working condition is used for the operator to clamp the part to be cut and then perform the cutting operation.

[0042] For the specific structure of the laparoscopic ureteral cold knife tool, please refer to Figure 4 , Figure 5 and Figure 6 .

[0043] The gripper part 2 comprises:

[0044] The spur rack 21 is movably arranged at one end of the shaft 1 away from the gripper operating rod 43 and is fixedly connected to the gripper operating rod 43. When driven by the gripper operating rod 43, it slides along the axis of the shaft 1.

[0045] The shaft heads 22 are arranged at one end of the shaft rod 1 close to the spur rack 21, and are provided with at least two shaft heads 22, and are evenly distributed around the center line of the shaft rod 1, and form a convex surface in the shape of a fan ring protruding toward the spur rack 21 on the side in the width direction of the spur rack 21;

[0046] The arc-shaped rack 23 has a concave surface on one side that matches the convex surface, and a tooth surface on the other side that meshes with the spur rack 21, and can rotate around the axis of the convex surface under the telescopic action of the spur rack 21;

[0047] The gripping arm 24 has one end fixedly connected to the arc-shaped rack 23 and the other end extending in a direction away from the shaft 1, and performs an opening and closing action as the arc-shaped rack 23 rotates;

[0048] The gripper 25 is fixedly connected to the other end of the gripping arm 24 and performs gripping and releasing actions as the gripping arm 24 opens and closes.

[0049] The grasping arm 24 and the grasping hand 25 are made of flexible materials, so that they have sufficient grasping strength while being unlikely to cause damage to the ureter.

[0050] The cutter section 3 comprises:

[0051] The blade 31 is movably embedded in the spur rack 21 and fixedly connected to the cutter operating rod 42, and slides along the axis of the shaft 1 when driven by the cutter operating rod 42;

[0052] The cooling water path 32 is provided inside the cutter operating rod 42 and is used to guide the cooling water to circulate inside the cutter operating rod 42 to reduce the temperature of the blade 31;

[0053] A cooling water inlet 33 is provided on one side of the cutter operating rod 42 away from the blade 31 and connected to the output end of the cooling water circulation system;

[0054] The cooling water outlet 34 is disposed on the other side of the cutter operating rod 42 away from the blade 31 and is connected to the input end of the cooling water circulation system.

[0055] The cutter operating rod 42 is coaxially inserted into the gripper operating rod 43 .

[0056] The cooling water circulation system is not shown in the figure. The cooling water circulation system is used to circulate and cool water to keep the blade 31 at a low temperature at all times, thereby reducing bleeding and tissue damage, reducing pain and inflammatory reactions, and improving the effect of the operation and the patient's recovery speed by freezing the tissue.

[0057] Furthermore, the cutter operating rod 42 is a flat rectangular shape, so that the cooling water path 32 can easily form a parallel inlet water path 321 and an outlet water path 322 inside the cutter operating rod 42. The blade 31 is a flat sheet with a blade on one side. The width direction of the blade 31 is perpendicular to the width direction of the cutter operating rod 42, and a cross-shaped groove 211 is formed in the straight rack 21 to slide with the blade 31 and the cutter operating rod 42. The cross-shaped groove 211 can more accurately guide the extension and retraction direction of the blade 31.

[0058] Figure 7 The assembly diagram of the laparoscopic ureteral cold knife tool was presented. Figure 1 and Figure 7 .

[0059] The handle 41 is in a columnar shape for easy grasping by the operator's palm, and the handle 41 is fixedly connected to the shaft rod 1 .

[0060] The gripper lever 43 further includes a ring 431 into which the operator's index finger and middle finger can be inserted. The ring 431 is arranged beside the handle 41 . The ring 431 enables the operator to push and pull the gripper lever 43 forward and backward to control the opening and closing of the gripper portion 2 .

[0061] The cutter operating lever 42 also includes a finger pressure portion 421, which is arranged in the palm of the operator against the handle 41, and is the position where the operator's thumb is located when the operator's index finger and middle finger are inserted into the ring 431. The cutter operating lever 42 is connected to the shaft 1 through an elastic connecting member 44. The elastic connecting member 44 is used to provide an elastic force to the cutter operating lever 42 to move toward the operator when the finger pressure portion 421 is not pressed by the operator, so that the blade 31 remains in a retracted posture.

[0062] Combination Figure 5 The elastic connecting member 44 includes: a guide rod 441, a guide seat 442 and a spring 443. The guide rod 441 is parallel to the cutter operating rod 42 and is fixedly connected to the finger pressure portion 421. The guide seat 442 is fixedly connected to the shaft 1. The guide seat 442 is slidably connected to the guide rod 441. The spring 443 is sleeved on the guide rod 441. The spring 443 is arranged on the side of the guide seat 442 facing the finger pressure portion 421, and the two ends of the spring 443 respectively abut against the finger pressure portion 421 and the guide seat 442.

[0063] Correspondingly, the gripper operating rod 43 and the shaft rod 1 can also be connected by another elastic connecting member 44, which is not shown in the figure. The elastic connecting member 44 is used to provide an elastic force to move the gripper operating rod 43 toward the operator when the ring 431 is not pressed by the operator, so that the gripper maintains a closed posture.

[0064] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A laparoscopic ureteral cold knife tool, characterized in that: The invention comprises a shaft (1) having an axial passage extending therethrough, wherein a cutter operating rod (42) and a gripper operating rod (43) capable of axial movement are arranged in the axial passage, wherein the same end of the cutter operating rod (42) and the gripper operating rod (43) protrudes out of the axial passage and can be manipulated, the other end of the cutter operating rod (42) is connected to a blade (31), and the other end of the gripper operating rod (43) is connected to two grippers (25) symmetrically arranged on both sides of the blade (31); The two grippers (25) extend out of the axial channel or partially retract into the axial channel under the axial action of the gripper operating rod (43), so that the two grippers (25) open when extended and close when retracted to grasp the ureter; The blade (31) extends out of the axial channel or retracts into the axial channel under the axial action of the cutter operating rod (42); when the gripper (25) grips the ureter, the blade (31) can be operated to extend to a target position to perform a cutting action; A cooling water path (32) is provided inside the cutter operating rod (42), and the cooling water path (32) is used to guide cooling water to circulate inside the cutter operating rod (42) to reduce the temperature of the blade (31).

2. The laparoscopic ureteral cold knife tool according to claim 1, characterized in that: The gripper (25) comprises a gripper arm (24), and the two gripper arms (24) are connected to a gripper operating rod (43) via a transmission mechanism; The transmission mechanism comprises a spur rack (21), a shaft head (22) and an arc-shaped rack (23); The spur rack (21) is arranged inside the axial channel, is axially movably connected to the shaft (1), and is fixedly connected to the gripper operating rod (43), and slides along the axis of the shaft (1) when driven by the gripper operating rod (43); the two shaft heads (22) are fixedly connected to the shaft (1), and form a convex surface in the shape of a fan ring protruding toward the spur rack (21) on the side of the gripper arm (24); One end of the arc-shaped rack (23) is fixedly connected to the gripping arm (24), and the other end has a spherical surface that matches the convex surface and a tooth surface that meshes with the spur rack (21). The arc-shaped rack (23) can rotate around the axis of the convex surface under the extension and contraction action of the spur rack (21), thereby driving the gripping arm (24) to perform an opening and closing action.

3. The laparoscopic ureteral cold knife tool according to claim 2, characterized in that: The gripping arm (24) is made of a flexible material.

4. The laparoscopic ureteral cold knife tool according to claim 2, characterized in that: The blade (31) is movably embedded in the spur rack (21), the cutter operating rod (42) is coaxially inserted in the gripper operating rod (43), and the blade (31) slides along the axis of the shaft (1) when driven by the cutter operating rod (42).

5. The laparoscopic ureteral cold knife tool according to claim 2, characterized in that: The cutter operating rod (42) is in a flat rectangular shape, the blade (31) is a flat sheet having a blade on one side, the width direction of the blade (31) is perpendicular to the width direction of the cutter operating rod (42), and a cross-shaped sliding groove (211) is formed in the spur rack (21) for slidingly cooperating with the blade (31) and the cutter operating rod (42).

6. The laparoscopic ureteral cold knife tool according to claim 1, characterized in that: A cooling water inlet (33) is provided on one side of the end of the cutter operating rod (42) away from the blade (31), and the cooling water inlet (33) is connected to the output end of the cooling water circulation system; A cooling water outlet (34) is provided on the other side of the cutter operating rod (42) away from the end of the blade (31), and the cooling water outlet (34) is connected to the input end of a cooling water circulation system.

7. The laparoscopic ureteral cold knife tool according to claim 1, characterized in that: One end of the shaft rod (1) is fixedly connected to a handle (41), and the handle (41) is columnar and convenient for an operator to grasp with his palm.

8. The laparoscopic ureteral cold knife tool according to claim 7, characterized in that: One end of the gripper operating rod (43) is fixedly connected to a collar (431), the collar (431) being shaped to facilitate insertion of an operator's index finger and middle finger therein, the collar (431) being arranged beside the handle (41), the collar (431) enabling an operator to push and pull the gripper operating rod (43) forward and backward, thereby controlling the opening and closing of the gripper (25).

9. The laparoscopic ureteral cold knife tool according to claim 8, characterized in that: The cutter operating lever (42) further comprises a finger pressing portion (421), which is arranged at the position where the operator's thumb is located when the operator's palm is against the handle (41) and the operator's index finger and middle finger are inserted into the ring (431).

10. The laparoscopic ureteral cold knife tool according to claim 1, characterized in that: The shaft (1) is connected to the cutter operating rod (42) and / or the gripper operating rod (43) via an elastic connecting member (44), wherein the elastic connecting member (44) is used to provide an elastic force to the cutter operating rod (42) and / or the gripper operating rod (43) to move toward an operator when no external force is applied, thereby keeping the blade (31) in a retracted position and keeping the gripper (25) in a closed position.

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