A urethral lithotripsy forceps

Abstract

The invention discloses a urethral lithotripsy forceps, comprising a forceps body (1), the forceps body (1) being provided with a fixed rod (2) and a driven rod (3), the fixed rod (2) being tubular, the front end of the driven rod (3) being provided with a pressing block (4) slidably connected to the fixed rod (2), the bottom of the front end of the fixed rod (2) being provided with a connecting portion (5) extending forward, the connecting portion (5) being provided with a long strip through hole (6), a long strip pressing plate (7) being provided in the through hole (6), the front end of the pressing plate (7) being rotatably connected to the connecting portion (5), the pressing plate (7) being provided with an elastic device (8) connected to the fixed rod (2); the inner hole axis of the fixed rod (2) being lower than the inner hole axis of the fixed rod (2), the top surface of the connecting portion (5) being aligned with the inner side wall of the fixed rod (2), and the bottom surface of the connecting portion (5) being aligned with the outer side wall of the fixed rod (2). The invention has the advantages of good use effect and long service life.

Description

Technical Field

[0001] The invention belongs to the field of urethral lithotripsy forceps. Background Art

[0002] There are two types of existing urethral lithotripsy forceps. The first type of lithotripsy forceps, such as the urethral lithotripsy forceps with application number 97244661.3, includes a clamp body, a connecting rod consisting of a fixed rod and a driven rod is provided on the clamp body, and the driven rod can be moved forward and backward through the clamp body. A fixed head is provided on the front end surface of the fixed rod, and a movable head is provided on the front end surface of the driven rod. The fixed head and the movable head constitute the clamp head of the lithotripsy forceps. When the driven rod moves, the movable head drives the movable head to rotate compared with the fixed head, so that small stones can be directly clamped and pulled out of the urethra, or large stones can be crushed into small stones and then clamped and pulled out of the urethra respectively. The movable head and the fixed head are both connected to the front end of the connecting rod. When the lithotripsy is inserted into the urethra, the area of ​​the inserted end is small and can be easily inserted into the urethra. However, when clamping or crushing stones, some stones have high hardness, good roundness and smooth surface, which makes it difficult for the movable head to clamp the stones when rotating. As the angle between the movable head and the fixed head becomes smaller, the stones can easily run out from between the movable head and the fixed head under the action of the outward component force. Even if a toothed structure that increases the friction is set on the movable head and the fixed head, it is difficult to play an effective role, resulting in poor use effect of the first type of lithotripsy.

[0003] The second type of lithotripsy, such as the powerful lithotripsy for urethral lithotripsy with application number 201320887376.X, comprises a clamp body, a connecting rod consisting of a fixed rod and a driven rod is provided on the clamp body, and the driven rod can be moved forward and backward through the clamp body, wherein the fixed rod is tubular, and the connecting rod passes through the fixed rod, a fixed head is provided on one side of the front end of the fixed rod, and a movable head is provided on one side of the front end of the driven rod, and the movable head clamps or crushes the stone when it moves toward the fixed head, and the stone is not easy to run out from between the fixed head and the movable head. However, since the movable head and the fixed head are both on one side of the connecting rod, an L-shaped bend is formed on the extending end of the lithotripsy when the lithotripsy is extended into the urethra. This bend not only makes the extending end area of ​​the lithotripsy too large, making it difficult to advance in the narrow urethra (the diameter of the adult urethra is 0.7-1 cm), but it is also easy to cause scratches on the urethral surface when advancing, and how to make the stone smoothly enter between the fixed head and the movable head also requires repeated adjustments, which wastes a lot of time, resulting in poor use effect of the second type of lithotripsy.

[0004] Therefore, the existing lithotripsy forceps have the defect of poor use effect. Summary of the invention

[0005] The purpose of the present invention is to provide a urethral lithotripsy forceps, which has the advantages of good use effect and long service life.

[0006] The technical solution of the present invention is as follows: a urethral lithotripter comprises a clamp body, a fixed rod and a driven rod are arranged on the clamp body, the fixed rod is tubular, the front end of the driven rod is provided with a pressure block slidably connected to the fixed rod, the bottom of the front end of the fixed rod is provided with a connecting part extending forward, the connecting part is provided with a long strip through hole, a long strip pressure plate is arranged in the through hole, the front end of the pressure plate is rotatably connected to the connecting part, and the pressure plate is provided with an elastic device connected to the fixed rod.

[0007] In the aforementioned urethral lithotripsy, the axis of the outer peripheral surface of the fixing rod is lower than the axis of the inner hole of the fixing rod, the top surface of the connecting portion is aligned with the inner side wall of the fixing rod, and the bottom surface of the connecting portion is aligned with the outer side wall of the fixing rod.

[0008] In the aforementioned urethral lithotripsy, a step groove is provided on the bottom surface of the rear side of the pressing plate, and the elastic device is a U-shaped spring steel wire, both ends of the spring steel wire are fixed to the fixing rod, and the bottom edge of the spring steel wire abuts against the bottom surface of the step groove.

[0009] In the aforementioned urethral lithotripsy, the rear end of the pressing plate is provided with an abutment surface.

[0010] In the aforementioned urethral lithotripter, a long strip-shaped groove is provided on the inner wall of the fixing rod, one end of the groove extends to the through hole, a first steel wire is provided in the groove, one end of the first steel wire is fixed to the side wall of the pressing block, and the other end of the first steel wire is fixed to the bottom surface of the pressing plate, a steering shaft is provided in the through hole, and the first steel wire passes through the bottom of the steering shaft.

[0011] In the aforementioned urethral lithotripsy forceps, second steel wires are provided on both sides of the pressing plate, one end of the second steel wire is fixed to the bottom surface of the pressing plate, and the other end of the second steel wire is fixed to the side wall of the through hole.

[0012] In the aforementioned urethral lithotripsy, a pressure ring is provided at the front end of the pressure block, and a cutting edge formed by an inner chamfer is provided at the front end of the pressure ring.

[0013] In the aforementioned urethral lithotripsy forceps, the front end of the connecting portion is provided with a guide portion formed by an inner chamfer.

[0014] In the aforementioned urethral lithotripsy, a blind hole is provided at the front end of the pressing block, a pressing block is provided in the blind hole, the pressing block is connected to the bottom surface of the blind hole via a coil spring, and a silicone cap is provided at the front end of the pressing block.

[0015] In the aforementioned urethral lithotripsy forceps, a plurality of dividing grooves are provided at the rear end of the pressing plate, and ribs corresponding to the dividing grooves are provided on the rear end side wall of the through hole.

[0016] Compared with the prior art, the present invention is based on the existing lithotripsy, firstly improving the pliers head, using the squeezing force between the pressing block and the pressing plate to clamp or crush the calculi, wherein the pressing plate can rotate, and when the pliers are advanced, the pressing plate is hidden in the connecting portion of the fixed rod, and the cross-sectional area of ​​the deep end is small, so it can be easily penetrated into the urethra, and the deep end maintains a straight shape, and it is not easy to cause scratches on the urethra surface when advancing; when the pressing plate is hidden in the through hole of the connecting portion, the calculus can easily pass over the pressing plate and enter between the pressing plate and the pressing block, and no repeated adjustment is required, and the calculus can be clamped quickly, thereby improving the use effect of the lithotripsy; wherein the pressing block can move forward and backward relative to the pressing plate, and when the distance between the pressing block and the pressing plate is reduced, the calculus can be easily clamped because the force between the pressing block and the pressing plate will not squeeze the calculus outward, thereby further improving the use effect of the lithotripsy. Secondly, the fixing rod is improved, and the existing fixing rod with coaxial inner and outer circles is changed into a fixing rod with non-coaxial inner and outer circles. On the basis of retaining the advantages of good outer circumference roundness of the fixing rod, easy clamping and sufficient rigidity, the bottom of the fixing rod has a larger wall thickness, so that a connecting part with a larger wall thickness can be formed, and a through hole with a larger depth can be formed in the connecting part. A pressing plate with a larger wall thickness is used, so that the pressing plate is not easy to bend when squeezing stones, thereby improving the service life of the lithotripsy forceps. Therefore, the present invention has the advantages of good use effect and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure at A.

[0019] Figure 3 yes Figure 2 Top view of the .

[0020] Figure 4 is a schematic cross-sectional view of the fixing rod.

[0021] The marks in the accompanying drawings are: 1-clamp body, 2-fixed rod, 3-driven rod, 4-pressure block, 5-connecting part, 6-through hole, 7-pressure plate, 8-elastic device, 9-step groove, 10-abutment surface, 11-groove, 12-first steel wire, 13-steering shaft, 14-second steel wire, 15-pressure ring, 16-blade edge, 17-guide part, 18-blind hole, 19-pressure block, 20-coil spring, 21-silicone cap, 22-dividing groove, 23-rib. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] Embodiment. A urethral lithotripsy forceps, such as Figure 1 As shown, the clamp body 1 includes a fixing rod 2 and a driven rod 3, and the fixing rod 2 is tubular. The clamp body 1 is a prior art, such as the clamp body of the urethral lithotripsy forceps in application No. 201320887376.X, or the clamp body of the hysteroscopic grasping forceps in application No. 202121710830.5 previously applied by the applicant, which can be used in this embodiment, as long as the following conditions are met: the fixing rod 2 is tubular, and the driven rod 3 is slidably connected in the fixing rod 2, and the driven rod 3 can be moved back and forth in the fixing rod 2 by operating the clamp body 1.

[0024] The characteristic is that the front end of the driven rod 3 is provided with a pressing block 4 which is slidably connected with the fixed rod 2, the bottom of the front end of the fixed rod 2 is provided with a connecting portion 5 extending forward, the connecting portion 5 is provided with a long through hole 6, a long pressing plate 7 is provided in the through hole 6, the front end of the pressing plate 7 is rotatably connected with the connecting portion 5 through a rotating shaft, and the pressing plate 7 is provided with an elastic device 8 connected with the fixed rod 2. The pressing block 4, the connecting portion 5 and the pressing plate 7 are all made of hardened stainless steel.

[0025] The axis of the outer peripheral surface of the fixing rod 2 is lower than the axis of the inner hole of the fixing rod 2, the top surface of the connecting portion 5 is aligned with the inner side wall of the fixing rod 2, and the bottom surface of the connecting portion 5 is aligned with the outer side wall of the fixing rod 2. On the basis of not affecting the structural strength of the fixing rod 2, the bottom thickness of the fixing rod 2 is made larger, and the thickness of the connecting portion 5 is larger, which facilitates the arrangement of parts in the connecting portion 5.

[0026] A step groove 9 is provided on the bottom surface of the rear side of the pressing plate 7, and the function of the step groove 9 is to prevent the elastic device 8 from being squeezed out of the bottom surface of the connecting portion 5 when the pressing plate 7 is rotated downward to the maximum. The elastic device 8 is a U-shaped spring steel wire, and both ends of the spring steel wire are fixed to the fixing rod 2, and the bottom edge of the spring steel wire abuts against the bottom surface of the step groove 9. When the pressing plate 7 rotates downward, the spring steel wire slides on the bottom surface of the step groove 9, and the spring steel wire mainly deforms around the lower end, which makes deformation easier, and the spring steel wire gives the doctor less feedback, which is convenient for the doctor to operate.

[0027] The rear end of the pressing plate 7 is provided with an abutting surface 10, and the abutting surface 10 is inclined. When the stone contacts the abutting surface 10, the abutting surface 10 exerts a downward force on the stone to prevent the stone from falling out.

[0028] The inner wall of the fixing rod 2 is provided with a long groove 11, one end of the groove 11 extends to the through hole 6, a first steel wire 12 is provided in the groove 11, one end of the first steel wire 12 is fixed to the side wall of the pressing block 4, and the other end of the first steel wire 12 is fixed to the bottom surface of the pressing plate 7, a steering shaft 13 is provided in the through hole 6, and the first steel wire 12 passes through the bottom of the steering shaft 13. The steering shaft 13 is used for steering the first steel wire 12, so that the pressing plate 7 is pulled downward and rotated more uniformly, which is convenient for the doctor to operate, and is also used for limiting the angle when the pressing plate 7 rotates downward to prevent the pressing plate 7 from exceeding the bottom surface range of the fixing rod 2.

[0029] Second steel wires 14 are provided on both sides of the pressing plate 7, one end of the second steel wires 14 is fixed to the bottom surface of the pressing plate 7, and the other end of the second steel wires 14 is fixed to the side wall of the through hole 6. The second steel wires 14 are used to limit the maximum upward rotation angle of the pressing plate 7.

[0030] A pressing ring 15 is disposed at the front end of the pressing block 4 , and a cutting edge 16 formed by inner chamfering is disposed at the front end of the pressing ring 15 .

[0031] The front end of the connecting portion 5 is provided with a guide portion 17 formed by an inner chamfer.

[0032] The front end of the pressing block 4 is provided with a blind hole 18, and a pressing block 19 is provided in the blind hole 18. The pressing block 19 is connected to the bottom surface of the blind hole 18 through a coil spring 20. The pressing block 19 is slidably connected to the blind hole 18, and a silicone cap 21 is provided at the front end of the pressing block 19.

[0033] The rear end of the pressing plate 7 is provided with a plurality of dividing grooves 22, and the rear end side wall of the through hole 6 is provided with ribs 23 corresponding to the dividing grooves 22. The ribs 23 are used to prevent larger stones from falling into the through hole 6, because after the larger stones fall into the through hole 6, the urethral wall may be compressed under the downward pressure component of the pressing plate 7. The dividing grooves 22 on the pressing plate 7 cooperate with the ribs 23 to enable the pressing plate 7 to smoothly rotate downward and be completely hidden in the connecting portion 5.

[0034] How to use: Figure 2As shown, by operating the clamp body 1, the driven rod 3 moves backward, and the driven rod 3 drives the pressure block 4 to move backward. The pressure block 4 drives the pressure plate 7 to rotate downward through the first steel wire 12 until the steering shaft 13 contacts the pressure plate 7, and the pressure plate 7 is completely hidden in the through hole 6. Then the fixed rod 2 is extended into the urethra. When the stone touches the connecting part 5, under the action of the guide part 17, the stone passes through the upper side of the connecting part 5. At this time, the doctor should find it difficult to feel the resistance until the fixed rod 2 or the silicone cap 21 contacts the stone. The forward resistance of the lithotripsy is significantly increased, which can be perceived by the doctor. By operating the clamp body 1, the driven rod 3 moves forward. The driven rod 3 drives the clamping block 19 and the silicone cap 21 to move forward through the coil spring 20, and pushes the stone forward. At the same time, the first steel wire 12 is loosened, and under the action of the elastic device 8, the pressure plate 7 rotates upward. As the driven rod 3 continues to move forward, the stone also continues to move forward, and the pressing plate 7 continues to rotate upward. When the second steel wire 14 is tight, the pressing plate 7 no longer rotates, and the pressing plate 7 prevents the stone from moving forward. The stone is clamped. When the stone is small, the stone can be directly clamped out. During the clamping process, the spiral spring 20 is in a compressed state to ensure that the stone is in a clamped state to prevent the stone from falling due to misoperation such as hand shaking of the doctor. The silicone cap 21 gives the stone a larger clamping area to reduce the fragmentation of the stone, so that the stone can be taken out more cleanly, and the surgical effect is better. When the stone is large and difficult to remove, the driven rod 3 continues to move forward, and the clamping block 19 and the silicone cap 21 are pressed into the blind hole 18. The blade 16 cuts off the excess part of the stone, retains the larger part in the middle, and then takes out the larger part. Due to the high brittleness of urethral stones, the cut part has actually been broken into very small pieces, which can be easily discharged through urination after surgery, and the surgical effect can still be ensured.

[0035] The invention has the advantages of good use effect and long service life.

Claims

1. A urethral lithotripsy forceps, comprising a forceps body (1), the forceps body (1) being provided with a fixing rod (2) and a driven rod (3), the fixing rod (2) being tubular, characterized in that: The front end of the driven rod (3) is provided with a pressure block (4) slidably connected to the fixed rod (2); the bottom of the front end of the fixed rod (2) is provided with a connecting portion (5) extending forward, the connecting portion (5) is provided with a long strip through hole (6), a long strip pressure plate (7) is provided in the through hole (6), the front end of the pressure plate (7) is rotatably connected to the connecting portion (5), and the pressure plate (7) is provided with an elastic device (8) connected to the fixed rod (2); the front end of the pressure block (4) is provided with a pressure ring (15), and the front end of the pressure ring (15) is provided with a A cutting edge (16) is formed by an inner chamfer; a long strip-shaped groove (11) is provided on the inner wall of the fixing rod (2); one end of the groove (11) extends to the through hole (6); a first steel wire (12) is provided in the groove (11); one end of the first steel wire (12) is fixed to the side wall of the pressing block (4); the other end of the first steel wire (12) is fixed to the bottom surface of the pressing plate (7); a steering shaft (13) is provided in the through hole (6); and the first steel wire (12) passes through the bottom of the steering shaft (13).

2. The urethral lithotripsy forceps according to claim 1, characterized in that: The axis of the outer peripheral surface of the fixing rod (2) is lower than the axis of the inner hole of the fixing rod (2), the top surface of the connecting portion (5) is aligned with the inner side wall of the fixing rod (2), and the bottom surface of the connecting portion (5) is aligned with the outer side wall of the fixing rod (2).

3. The urethral lithotripsy forceps according to claim 1, characterized in that: A step groove (9) is provided on the bottom surface of the rear side of the pressure plate (7); the elastic device (8) is a U-shaped spring steel wire, both ends of the spring steel wire are fixed to the fixing rod (2), and the bottom edge of the spring steel wire abuts against the bottom surface of the step groove (9).

4. The urethral lithotripsy forceps according to claim 1, characterized in that: The rear end of the pressing plate (7) is provided with an abutment surface (10).

5. The urethral lithotripsy forceps according to claim 1, characterized in that: A second steel wire (14) is provided on both sides of the pressing plate (7), one end of the second steel wire (14) is fixed to the bottom surface of the pressing plate (7), and the other end of the second steel wire (14) is fixed to the side wall of the through hole (6).

6. The urethral lithotripsy forceps according to claim 1, characterized in that: The front end of the connecting portion (5) is provided with a guide portion (17) formed by an inner chamfer.

7. The urethral lithotripsy forceps according to claim 1, characterized in that: The front end of the pressing block (4) is provided with a blind hole (18), a pressing block (19) is provided in the blind hole (18), the pressing block (19) is connected to the bottom surface of the blind hole (18) via a coil spring (20), and a silicone cap (21) is provided at the front end of the pressing block (19).

8. The urethral lithotripsy forceps according to claim 1, characterized in that: The rear end of the pressing plate (7) is provided with a plurality of dividing grooves (22), and the rear end side wall of the through hole (6) is provided with ribs (23) corresponding to the dividing grooves (22).

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