Ureter low-pressure blocking clamp used in laparoscopic ureteral lithotomy

Abstract

The invention discloses a ureteral low-pressure blocking clamp used in laparoscopic ureteral lithotomy, and relates to medical instruments, the ureteral low-pressure blocking clamp comprises a main clamping arm and an auxiliary clamping arm, blocking clamps are arranged on one side of the main clamping arm and one side of the auxiliary clamping arm, a rotating groove is formed in one side of the main clamping arm, a rotating piece is arranged between the auxiliary clamping arm and the blocking clamps, and the rotating piece is connected with the main clamping arm and the auxiliary clamping arm. Rotating shafts are symmetrically arranged on the rotating piece, the rotating piece is located in the rotating groove, and the blocking clamp is of an arc-shaped structure; when an operation is prepared, the coil spring enables the main clamping arm and the auxiliary clamping arm to be kept open, the coil spring is conveyed to the position, to be blocked, of the ureter through the laparoscope instrument channel through the operation part, the elastic coefficient of the coil spring is 20-30 N / m, enough clamping force is provided to block urine circulation, meanwhile, the clamping force is controlled within the low-pressure range, the ureter is prevented from being damaged, and the operation efficiency is improved. The thickness of the silica gel or polyurethane protective pad on the surface of the blocking clip is 1.5 mm-2. 5mm, the blocking clip can buffer pressure, the friction force between the blocking clip and the ureter is increased through anti-skid textures, stable clamping and closing are ensured, the rotating piece is detachably connected with the rotating shaft, and instrument maintenance is facilitated.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a ureteral low-pressure clamp used in laparoscopic ureterolithotomy. Background Technology

[0002] Ureteral stones are a common disease of the urinary system. Laparoscopic ureterolithotomy is one of the effective methods for treating large ureteral stones, especially for treating complex upper ureteral stones. However, stone movement during the operation is a common problem. During the operation, the patient's breathing or the operation of surgical instruments can easily cause the stone to move, which may increase the difficulty of the operation, prolong the operation time, and even cause complications. If the stone in the upper ureter moves upward into the renal pelvis, it may even make the stone impossible to remove and the operation will fail.

[0003] Existing clamps, such as renal artery clamps, are mostly high-pressure clamps, which cannot achieve precise pressure control. Although they can clamp the ureter at both ends of the stone to prevent its movement, excessive local pressure may cause ischemic damage to the ureteral wall, increasing the risk of postoperative complications such as ureteral stenosis. Conventional vascular clamp pressure is often higher than 150 mmHg, exceeding the ureteral wall tolerance threshold (normal wall tolerance pressure ≤ 80 mmHg), which can easily lead to mucosal ischemia, postoperative stenosis, or perforation (incidence rate of about 5.7%). Therefore, those skilled in the art have provided a low-pressure ureteral clamp for use in laparoscopic ureterolithotomy to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide a ureteral low-pressure clamp for use in laparoscopic ureterolithotomy to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A ureteral low-pressure clamp for use in laparoscopic ureterolithotomy includes a main clamp arm and a secondary clamp arm. Each of the main clamp arm and the secondary clamp arm is provided with a clamp on one side. A rotating groove is provided on one side of the main clamp arm, and a rotating component is provided between the secondary clamp arm and the clamp. A rotating shaft is symmetrically provided on the rotating component. The rotating component is located in the rotating groove, and the clamp has an arc-shaped structure.

[0007] As a further aspect of the present invention: the surface of the blocking clamp is provided with a protective pad, which is made of silicone or polyurethane material, and a coil spring is provided between the main clamp arm and the auxiliary clamp arm. The main clamp arm, the auxiliary clamp arm and the blocking clamp are all made of stainless steel or titanium alloy.

[0008] As a further embodiment of the present invention: the rotating component is matched with the rotating groove, and the rotating component is detachably connected to the rotating shaft.

[0009] As a further embodiment of the present invention: the main clamping arm and the auxiliary clamping arm are provided with scale markings, and the two ends of the disc spring are respectively firmly connected to the main clamping arm and the auxiliary clamping arm through fixing parts, and the elastic coefficient of the disc spring is 20N / m-30N / m.

[0010] As a further aspect of the present invention: the thickness of the protective pad is 1.5mm-2.5mm, and the surface of the protective pad is provided with anti-slip texture.

[0011] As a further embodiment of the present invention: an adjusting torsion spring is provided on the disc spring, and sleeves are fixedly connected to both ends of the adjusting torsion spring. An adjusting groove is opened in the sleeve. A limiting block is fixedly connected to the disc spring. Two sets of limiting blocks are symmetrically arranged, and one limiting block is located in the sleeve.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. During the surgical preparation stage, the coil spring is in a natural or pre-tensioned state. The main clamp arm and the auxiliary clamp arm maintain a certain opening angle under the action of the coil spring. The blocking clip is located on both sides and is in the position to be clamped. The doctor inserts the blocking clip into the body through a 12mm trocar and then opens the main clamp arm and the auxiliary clamp arm. At this time, the coil spring is compressed and stores elastic potential energy. When the blocking clip is released at the ureter above the stone, the blocking clip is released. The coil spring releases elastic potential energy and drives the main clamp arm and the auxiliary clamp arm to close the blocking clip, creating a clear and stable surgical field for subsequent ureterotomy and stone removal operations. Since the rotating part and the rotating groove are matched, the rotating part slides smoothly in the rotating groove. The blocking clip gradually approaches the ureter. The rotating part and the rotating shaft are detachably connected, which is convenient for replacement when the instrument is maintained, cleaned or damaged.

[0014] 2. As the main clamping arm and the auxiliary clamping arm gradually approach each other, the disc spring is further compressed, storing elastic potential energy. The elastic coefficient of the disc spring is between 20N / m and 30N / m. This range ensures that when clamping the ureter, it can provide sufficient clamping force to effectively block the flow of urine in the ureter, while controlling the clamping force within a low-pressure range to avoid excessive compression damage to the ureter.

[0015] 3. When the clamping clip contacts the ureter, the protective pad comes into play first. The protective pad is made of silicone or polyurethane material, with a thickness of 1.5mm-2.5mm. It is soft and has good elasticity, which can effectively buffer the pressure of the clamping clip on the ureter and avoid damage to the ureteral tissue due to the concentration of clamping force. At the same time, the surface of the protective pad is provided with anti-slip texture, which can increase the friction between the clamping clip and the ureter, prevent the clamping clip from sliding on the ureter, and ensure the stability of the clamping.

[0016] 4. The scale markings on the main and auxiliary clamping arms provide doctors with a direct reference for the degree of clamping. During the clamping process, doctors can accurately control the relative position of the main and auxiliary clamping arms according to the scale markings, thereby accurately controlling the clamping pressure. Doctors can adjust the clamping pressure to an appropriate level according to the specific condition of the patient's ureter, improving the precision of the surgical operation.

[0017] 5. In this ureteral low-pressure clamp, the coil spring mainly provides elastic restoring force, allowing the main and auxiliary clamping arms to maintain a certain open state when no external force is applied, facilitating clamping of the ureter and other tissues during operation. Furthermore, it can produce a certain degree of elastic deformation after external force is applied to adapt to different operational needs. The adjusting torsion spring is the power source for the entire adjusting mechanism. When the adjusting torsion spring is rotated, its elastic characteristics generate torque because its two ends are fixedly connected to the sleeve. This torque is transmitted to the connected sleeve, causing the sleeve to move along the axial or circumferential direction of the coil spring. The sleeve has an adjusting groove, and two sets of limiting blocks are fixedly connected to the coil spring, symmetrically arranged. One set of limiting blocks is located inside the sleeve. When the sleeve moves under the drive of the adjusting torsion spring, it interacts with the limiting block located inside. By rotating the adjusting torsion spring, the sleeve moves on the coil spring, thereby pushing or pulling the limiting block on the coil spring to change its position. The change in the position of the limiting block can limit the deformation range of the coil spring, thus adjusting the magnitude of the coil spring's elastic force. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a ureteral low-pressure clamp used in laparoscopic ureterolithotomy.

[0019] Figure 2 This is an exploded view of a ureteral low-pressure clamp used in a laparoscopic ureterolithotomy.

[0020] Figure 3 This is a schematic diagram of the engagement between the rotating groove and the rotating component in a ureteral low-pressure clamp used in laparoscopic ureterolithotomy.

[0021] Figure 4 This is a schematic diagram of the interaction between the adjusting torsion spring and the sleeve in a ureteral low-pressure clamp used in a laparoscopic ureterolithotomy.

[0022] In the diagram: 1. Main clamping arm; 2. Disc spring; 3. Secondary clamping arm; 4. Rotating groove; 5. Rotating shaft; 6. Rotating component; 7. Protective pad; 8. Fixing component; 9. Blocking clamp; 10. Adjusting torsion spring; 11. Sleeve; 12. Adjusting groove; 13. Limiting block. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] Reference Figures 1-4 This embodiment provides a ureteral low-pressure clamp for use in laparoscopic ureterolithotomy, including a main clamp arm 1 and a secondary clamp arm 3. Both the main clamp arm 1 and the secondary clamp arm 3 are provided with a clamp 9 on one side. A rotating groove 4 is opened on one side of the main clamp arm 1, and a rotating component 6 is provided between the secondary clamp arm 3 and the clamp 9. A rotating shaft 5 is symmetrically arranged on the rotating component 6. The rotating component 6 is located in the rotating groove 4, and the clamp 9 has an arc-shaped structure.

[0026] The surface of the blocking clamp 9 is provided with a protective pad 7, which is made of silicone or polyurethane material. The main clamp arm 1, the auxiliary clamp arm 3 and the blocking clamp 9 are all made of stainless steel or titanium alloy.

[0027] The protective pad 7 has a thickness of 1.5mm-2.5mm, and the surface of the protective pad 7 is provided with anti-slip texture;

[0028] During the surgical preparation phase, the coil spring 2 is in a natural or pre-tensioned state. The main clamp arm 1 and the auxiliary clamp arm 3 maintain a certain opening angle under the action of the coil spring 2. The blocking clamp is located on both sides and is in the position to be clamped. The doctor inserts the blocking clamp into the body through a 12mm trocar and then opens the main clamp arm 1 and the auxiliary clamp 3. At this time, the coil spring 2 is compressed and stores elastic potential energy. When the blocking clamp is released at the ureter above the stone, the blocking clamp is released, and the coil spring 2 releases elastic potential energy, driving the main clamp arm 1 and the auxiliary clamp arm 3 to close the blocking clamp, creating a clear and stable surgical field for subsequent ureterotomy and stone removal operations. Since the rotating part 6 and the rotating groove 4 are matched, the rotating part 6 slides smoothly in the rotating groove 4, and the blocking clamp gradually approaches the ureter. The rotating part 6 and the rotating shaft 5 are detachably connected, which facilitates replacement when the instrument is maintained, cleaned or damaged.

[0029] Example 2

[0030] Reference Figures 1-4 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that the rotating component 6 is matched with the rotating groove 4, and the rotating component 6 and the rotating shaft 5 are detachably connected.

[0031] The main clamping arm 1 and the auxiliary clamping arm 3 are provided with scale markings. The two ends of the disc spring 2 are respectively firmly connected to the main clamping arm 1 and the auxiliary clamping arm 3 through fixing parts 8. The elastic coefficient of the disc spring 2 is 20N / m-30N / m.

[0032] As the main clamping arm 1 and the secondary clamping arm 3 gradually approach each other, the disc spring 2 is further compressed, storing elastic potential energy. The elastic coefficient of the disc spring 2 is between 20 N / m and 30 N / m. This range ensures that when clamping the ureter, it can provide sufficient clamping force to effectively block the flow of urine in the ureter, while controlling the clamping force within a low-pressure range to avoid excessive compression damage to the ureter.

[0033] When the clamping clip 9 contacts the ureter, the protective pad 7 comes into play first. The protective pad 7 is made of silicone or polyurethane material, with a thickness of 1.5mm-2.5mm. It is soft and has good elasticity, which can effectively buffer the pressure of the clamping clip 9 on the ureter and avoid damage to the ureteral tissue due to the concentration of clamping force. At the same time, the surface of the protective pad 7 is provided with anti-slip texture, which can increase the friction between the clamping clip 9 and the ureter, prevent the clamping clip from sliding on the ureter, and ensure the stability of the clamping.

[0034] The scale markings on the main clamping arm 1 and the auxiliary clamping arm 3 provide doctors with an intuitive reference for the degree of clamping. During the clamping process, doctors can accurately control the relative position of the main and auxiliary clamping arms according to the scale markings, thereby accurately controlling the clamping pressure. Doctors can adjust the clamping pressure to an appropriate level according to the specific condition of the patient's ureter, thereby improving the precision of the surgical operation.

[0035] Example 3

[0036] Reference Figures 1-4 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that the disc spring 2 is provided with an adjusting torsion spring 10, both ends of the adjusting torsion spring 10 are fixedly connected with sleeves 11, the sleeves 11 are provided with adjusting grooves 12, and the disc spring 2 is fixedly connected with limit blocks 13. Two sets of limit blocks 13 are symmetrically arranged, and one side of the limit block 13 is located inside the sleeve 11.

[0037] In this ureteral low-pressure clamp, the coil spring 2 mainly provides elastic restoring force, allowing the main clamping arm 1 and the auxiliary clamping arm 3 to maintain a certain open state when no external force is applied, facilitating clamping of the ureter and other tissues during operation. Furthermore, it can produce a certain degree of elastic deformation after external force is applied to adapt to different operational needs. The adjusting torsion spring 10 is the power source for the entire adjusting mechanism. When the adjusting torsion spring 10 is rotated, because its two ends are fixedly connected to the sleeve 11, the elastic characteristics of the torsion spring will generate torque. This torque will be transmitted to the connected sleeve 11, causing the sleeve 11 to move along... The disc spring 2 moves in the axial or circumferential direction. The adjusting groove 12 is opened in the sleeve 11. The limiting block 13 is fixedly connected to the disc spring 2 and is symmetrically arranged in two sets. One of the limiting blocks 13 is located inside the sleeve 11. When the sleeve 11 moves under the drive of the adjusting torsion spring 10, it will interact with the limiting block 13 located inside it. By rotating the adjusting torsion spring 10, the sleeve 11 will move on the disc spring 2, thereby pushing or pulling the limiting block 13 on the disc spring 2 to change its position. The change in the position of the limiting block 13 can limit the deformation range of the disc spring 2, thereby adjusting the elastic force of the disc spring 2.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ureteral low-pressure clamp used in laparoscopic ureterolithotomy, characterized in that, It includes a main clamping arm (1) and a secondary clamping arm (3). Both the main clamping arm (1) and the secondary clamping arm (3) are provided with a blocking clamp (9) on one side. A rotating groove (4) is opened on one side of the main clamping arm (1), and a rotating component (6) is provided between the secondary clamping arm (3) and the blocking clamp (9). A rotating shaft (5) is symmetrically provided on the rotating component (6). The rotating component (6) is located in the rotating groove (4), and the blocking clamp (9) has an arc-shaped structure.

2. The ureteral low-pressure clamp used in laparoscopic ureterolithotomy according to claim 1, characterized in that, The blocking clamp (9) is provided with a protective pad (7) on its surface. The protective pad (7) is made of silicone or polyurethane material. A coil spring (2) is provided between the main clamp arm (1) and the auxiliary clamp arm (3). The main clamp arm (1), the auxiliary clamp arm (3) and the blocking clamp (9) are all made of stainless steel or titanium alloy.

3. The ureteral low-pressure clamp used in laparoscopic ureterolithotomy according to claim 2, characterized in that, The rotating component (6) is matched with the rotating groove (4), and the rotating component (6) and the rotating shaft (5) are detachably connected.

4. The ureteral low-pressure clamp used in laparoscopic ureterolithotomy according to claim 3, characterized in that, The main clamping arm (1) and the auxiliary clamping arm (3) are provided with scale markings. The two ends of the disc spring (2) are firmly connected to the main clamping arm (1) and the auxiliary clamping arm (3) respectively through the fixing member (8). The elastic coefficient of the disc spring (2) is 20N / m-30N / m.

5. The ureteral low-pressure clamp used in laparoscopic ureterolithotomy according to claim 3, characterized in that, The thickness of the protective pad (7) is 1.5mm-2.5mm, and the surface of the protective pad (7) is provided with anti-slip texture.

6. The ureteral low-pressure clamp used in laparoscopic ureterolithotomy according to claim 3, characterized in that, An adjusting torsion spring (10) is provided on the disc spring (2). Both ends of the adjusting torsion spring (10) are fixedly connected to sleeves (11). An adjusting groove (12) is opened in the sleeve (11). A limiting block (13) is fixedly connected on the disc spring (2). Two sets of limiting blocks (13) are symmetrically arranged. One limiting block (13) is located in the sleeve (11).

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