Calculus grabber for urinary surgery

Abstract

The invention relates to the field of calculus elimination, and particularly discloses a calculus grabber for urinary surgery. By arranging the one-way rotating assembly, when calculi in the body of a patient are taken out, an inserting pipe is inserted into the body of the patient, an operating rod is pushed to drive a mounting rod to move, a threaded groove and a clamping block drive a mounting shell to rotate reversely, the mounting rod drives a clamping jaw to move towards the outer portion of the inserting pipe, and the mounting rod drives a circular ring to move and stretch a spring; the clamping jaws are opened under the action of the abutting strips and make contact with the stone, then the operating rod is pulled outwards, the operating rod drives the mounting shell to rotate forwards through the threaded groove and the clamping block, at the moment, the mounting shell applies force to the mounting rod and drives the mounting rod and the clamping jaws to rotate, and the stretched spring drives the mounting rod and the clamping jaws to retract; the clamping jaw rotates to clamp the calculus and pull the calculus to the end part of the cannula, and the rotating calculus is in reinforced connection with the end part of the cannula through the internal thread, so that the calculus can be prevented from hurting the tissue of a patient in the taking-out process, the calculus can also be prevented from falling off in the taking-out process, and the patient can be better protected.

Description

Technical Field

[0001] This invention belongs to the field of stone removal technology, specifically relating to a urological stone grasping device. Background Technology

[0002] Urinary tract stones, also known as urinary stones, are hard mineral crystals that form in the kidneys, ureters, bladder, or urethra. They are common and frequently occurring diseases in urology. Stones are mainly caused by an imbalance between supersaturated minerals and crystallization inhibitors in the urine. The most common type is calcium oxalate stone. Stones vary in size, shape, and location. Typical symptoms include sudden, severe, colicky pain in the lower back or lower abdomen, often radiating to the groin, accompanied by hematuria, nausea, and vomiting.

[0003] Ultrasonic lithotripsy is an effective treatment for kidney stones, breaking large stones into smaller ones. Some of these smaller stones can be excreted through urine. However, some stones have unusual shapes that pose a risk of scratching the urethra when carried by urine. Therefore, specialized instruments are needed to remove these stones. Existing stone removal devices are mostly mechanical grippers. However, these grippers cannot completely enclose the stone during the grasping process, and the stone still has the drawback of damaging the patient's tissues. In addition, the mechanical gripper structure has few points of force application to the stone, and the stone may detach and remain in the urethra or other tissues during movement, easily causing secondary damage. It is clear that existing stone removal devices have significant shortcomings and need to be improved. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a urological stone grasping device to solve the problem of the risk of damage to patient tissues when using existing stone removal devices.

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

[0006] A urological stone grasping device, comprising:

[0007] A handle, on which an insertion tube is fixedly connected, and an operating rod is slidably connected in the insertion tube, and an internal thread is provided on the inner wall of the end of the insertion tube;

[0008] A unidirectional rotating assembly includes a mounting shell rotatably connected inside the cannula and a locking block fixedly connected to the mounting shell. The end of the operating rod is inserted into the mounting shell, and a threaded groove is provided on the surface of the end. The end of the mounting shell is fixedly connected to the locking block, which is engaged inside the threaded groove.

[0009] Two clamping rings are provided, and the two clamping rings are arranged at both ends of the mounting shell and are rotatably connected to the insertion tube;

[0010] The mounting rod is slidably connected inside the insertion tube, and one end of the insertion tube is inserted into the mounting shell, while the other end is fixedly connected to a ring. A spring is fixedly connected between the ring and a clamping ring. A clamping claw is hinged on the ring, and a bent abutment is fixedly connected between the clamping claw and the ring.

[0011] Preferably, the unidirectional rotating assembly further includes a plurality of mounting grooves arranged in a ring array on the inner wall of the mounting housing. A stop block and a retaining strip are fixedly connected to the inner wall of the mounting groove. A rotating roller is disposed in the mounting groove and is engaged between the stop block and the retaining strip. The stop block is configured to deform and narrow after being squeezed by the rotating roller, so that the rotating roller disengages from the retaining strip. One end of the mounting rod inserted into the mounting housing abuts against the rotating roller.

[0012] Preferably, the abutment is composed of a straight plate and two inclined plates spliced ​​together in a K-shape, and the straight plate is fixedly connected to the inner wall of the mounting groove, and the end of the inclined plate abuts against the rotating roller.

[0013] Preferably, the projection of the mounting groove on the radial side of the mounting shell is an isosceles trapezoid, and the abutment is mounted on the wide side of the mounting groove, while the retaining strip is mounted on the narrow side of the mounting groove.

[0014] Preferably, the projection of the mounting groove on the axial direction of the mounting shell is a right-angled trapezoid, and the abutment is installed on the wide side of the mounting groove, while the retaining strip is installed on the narrow side of the mounting groove.

[0015] Preferably, the abutment is made of plastic and the roller is made of steel.

[0016] Preferably, the operating rod has an axially arranged limiting groove, and the inner wall of the insertion tube is fixedly connected with a limiting strip inserted into the limiting groove.

[0017] Preferably, the end of the insertion tube is narrowed into a spherical shape.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention utilizes a unidirectional rotating assembly inside the cannula to control the unidirectional rotation of the grippers. When a user needs to remove stones from a patient, the cannula is inserted, and the operating lever moves the mounting rod. Simultaneously, the threaded groove and locking block cause the mounting shell to rotate in reverse. The rotated mounting shell exerts no force on the mounting rod, allowing the mounting rod to move the grippers outward from the cannula. The mounting rod also moves the ring, stretching the spring. The grippers open under the action of the retaining bar and come into contact with the stone. The user can then pull the operating lever outward, causing the operating lever to rotate the mounting shell forward through the threaded groove and locking block. The mounting shell then exerts force on the mounting rod, causing the mounting rod and grippers to rotate. The stretched spring causes the mounting rod and grippers to retract. The grippers rotate under the obstruction of the cannula, forcing the retaining bar to deform. The rotating grippers clamp the stone and pull it to the end of the cannula. The stone, rotating with the grippers, is reinforced with the end of the cannula through internal threads. This design effectively prevents damage to patient tissues during stone removal and also prevents the stone from falling out, thus better protecting the patient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the cannula of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the unidirectional rotating component of the present invention;

[0023] Figure 4 This is a schematic cross-sectional view of the mounting shell structure of the present invention. Figure 1 ;

[0024] Figure 5 This is a schematic cross-sectional view of the mounting shell structure of the present invention. Figure 2 ;

[0025] Figure 6 This is a schematic cross-sectional view of the mounting shell structure of the present invention. Figure 3 ;

[0026] In the diagram: 1. Handle; 2. Insert tube; 3. Operating lever; 4. Limit groove; 5. Limit bar; 6. Threaded groove; 7. One-way rotation assembly; 71. Mounting shell; 72. Clamping block; 73. Mounting groove; 74. Abutment block; 75. Rotating roller; 76. Clamping bar; 8. Clamping ring; 9. Mounting rod; 10. Ring; 11. Spring; 12. Gripper; 13. Abutment bar; 14. Internal thread. Detailed Implementation

[0027] 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.

[0028] Example:

[0029] Please see Figures 1-6 As shown, a urological stone grasping device is characterized by comprising:

[0030] Handle 1, with a tube 2 fixedly connected to the handle 1, and an operating rod 3 slidably connected in the tube 2. The inner wall of the end of the tube 2 is provided with an internal thread 14, and the end of the tube 2 is spherically narrowed. The internal thread 14 is provided on the inner wall of the narrowed end.

[0031] The unidirectional rotating assembly 7 includes a mounting shell 71 rotatably connected inside the insertion tube 2 and a locking block 72 fixedly connected to the mounting shell 71. The end of the operating rod 3 is inserted into the mounting shell 71, and a threaded groove 6 is provided on the surface of the end. The locking block 72, which is locked inside the threaded groove 6, is fixedly connected to the end of the mounting shell 71.

[0032] Two clamping rings 8 are provided, and the two clamping rings 8 are arranged at both ends of the mounting shell 71 and are rotatably connected to the insertion tube 2;

[0033] The mounting rod 9 is slidably connected inside the insertion tube 2, and one end of the insertion tube 2 is inserted into the mounting shell 71, while the other end is fixedly connected to a ring 10. A spring 11 is fixedly connected between the ring 10 and a clamping ring 8. A clamping claw 12 is hinged on the ring 10, and a bent abutment 13 is fixedly connected between the clamping claw 12 and the ring 10.

[0034] As can be seen from the above, by setting a one-way rotation component 7 inside the cannula 2 to control the one-way rotation of the gripper 12, when the user needs to remove stones from the patient's body, the cannula 2 can be inserted into the patient's body, pushing the operating rod 3 to move the mounting rod 9. At the same time, the mounting shell 71 is reversed through the threaded groove 6 and the locking block 72. The reversed mounting shell 71 does not apply force to the mounting rod 9. At this time, the mounting rod 9 moves the gripper 12 outward from the cannula 2. The mounting rod 9 moves the ring 10 to stretch the spring 11. The gripper 12 opens under the action of the abutment bar 13 and contacts the stone. Then the user can pull the operating rod 3 outward. The operating rod 3 moves the mounting shell through the threaded groove 6 and the locking block 72. 71 rotates forward. At this time, the mounting shell 71 applies force to the mounting rod 9, causing the mounting rod 9 and the clamp 12 to rotate. The stretched spring 11 causes the mounting rod 9 and the clamp 12 to retract. The clamp 12 rotates under the obstruction of the insertion tube 2 and forces the abutment bar 13 to deform. The rotating clamp 12 clamps the stone and pulls the stone to the end of the insertion tube 2. The stone rotating with the clamp 12 is reinforcedly connected to the end of the insertion tube 2 through the internal thread 14. Smaller branching branches on some oddly shaped stones will also be blocked or even broken by the insertion tube 2, causing the stone to retract into the insertion tube 2. This can prevent the stone from damaging the patient's tissue during the removal process and also prevent the stone from falling out during the removal process, thus better protecting the patient.

[0035] Please see Figures 2-4 As shown, the unidirectional rotating assembly 7 also includes a plurality of mounting grooves 73 arranged in a ring array on the inner wall of the mounting housing 71. The inner wall of the mounting groove 73 is fixedly connected to a stop block 74 and a retaining strip 76. A rotating roller 75 is provided in the mounting groove 73. The rotating roller 75 is engaged between the stop block 74 and the retaining strip 76. The stop block 74 is configured to deform and narrow after being squeezed by the rotating roller 75, so that the rotating roller 75 is disengaged from the retaining strip 76. One end of the mounting rod 9 inserted into the mounting housing 71 abuts against the rotating roller 75.

[0036] As can be seen from the above, when the user pushes the operating lever 3, the moving operating lever 3 drives the mounting shell 71 to rotate in reverse through the threaded groove 6 and the locking block 72. The rotated mounting shell 71 pushes the rotating roller 75 through the abutment block 74. At this time, the reverse force applied by the rotating roller 75 to the abutment block 74 forces the abutment block 74 to deform. The rotating roller 75 moves and disengages from the locking strip 76, increasing the range of motion. At this time, the rotating roller 75 can rotate freely and will not exert friction on the mounting rod 9. Therefore, the mounting rod 9 will not rotate with the mounting shell 71. When the user pulls the operating lever 3 outward, the moving operating lever 3 drives the mounting shell 71 to rotate forward through the threaded groove 6 and the locking block 72. The mounting shell 71 pushes the rotating roller 75 through the locking strip 76. The range of motion of the rotating roller 75 is limited, and it cannot rotate freely. At this time, the friction between the rotating roller 75 and the mounting rod 9 increases, and the mounting shell 71 can drive the mounting rod 9 to rotate through the rotating roller 75.

[0037] Please see Figures 4-6 As shown, in one embodiment, the abutment 74 is composed of a straight plate and two inclined plates, arranged in a K-shape. The straight plate is fixedly connected to the inner wall of the mounting groove 73, and the end of the inclined plate abuts against the rotating roller 75. When the mounting shell 71 reverses, the mounting shell 71 pushes the rotating roller 75 under force through the two inclined plates. The reaction force of the rotating roller 75 on the inclined plates causes the inclined plates to bend, thereby reducing the overall thickness of the abutment 74 and increasing the activity space of the rotating roller 75. At this time, the rotating roller 75 can rotate freely, and the mounting rod 9 will not rotate with the mounting shell 71. When the mounting shell 71 rotates forward, the mounting shell 71 pushes the rotating roller 75 through the locking strip 76. The rotating roller 75 is locked between the locking strip 76 and the abutment 74 and cannot rotate within a limited range of motion. At this time, the rotating mounting shell 71 drives the mounting rod 9 to rotate through the friction between the rotating roller 75 and the mounting rod 9.

[0038] Please see Figure 5 As shown, the projection of the mounting groove 73 on the radial side of the mounting shell 71 is an isosceles trapezoid, and the abutment 74 is installed on the wide side of the mounting groove 73, while the retaining strip 76 is installed on the narrow side of the mounting groove 73.

[0039] When installing the roller 75, the pre-compressed abutment 74 can be narrowed to increase the space between the abutment 74 and the clamping strip 76. Then, the roller 75 is inserted into the mounting groove 73 from the wider side of the inner wall of the mounting groove 73. The reset abutment 74 and the clamping strip 76 cooperate to clamp the roller 75, which can effectively prevent the roller 75 from falling out of the mounting groove 73 during operation.

[0040] Please see Figure 6 As shown, the projection of the mounting groove 73 onto the axial direction of the mounting housing 71 is a right-angled trapezoid. The abutment 74 is installed on the wide side of the mounting groove 73, and the retaining strip 76 is installed on the narrow side of the mounting groove 73. When the rotating roller 75 moves toward the abutment 74 and applies pressure to it, the radial movement space of the rotating roller 75 increases, which facilitates the rotation of the rotating roller 75. When the rotating roller 75 moves toward the retaining strip 76 and applies pressure to it, the radial movement space of the rotating roller 75 further decreases, which further restricts the rotation of the rotating roller 75, so that the rotating roller 75 is stably engaged between the mounting housing 71 and the mounting rod 9, which facilitates the mounting housing 71 to drive the mounting rod 9 to rotate.

[0041] When the stretched spring 11 drives the mounting rod 9 to retract via the ring 10, the rotating mounting shell 71 drives the mounting rod 9 to rotate via the rotating roller 75. The mounting rod 9 drives the gripper 12, the grabbed stone, the spring 11 and the clamping ring 8 to rotate together. The mounting rod 9 will also gradually retract into the mounting shell 71 along the axial direction. The rotating gripper 12 drives the rotating stone to be clamped at the end of the insertion tube 2 through the internal thread 14 to prevent the stone from falling off.

[0042] The abutment 74 is made of plastic, and the rotating roller 75 is made of steel.

[0043] The operating lever 3 is provided with an axially arranged limiting groove 4, and the inner wall of the insertion tube 2 is fixedly connected with a limiting strip 5 inserted into the limiting groove 4. The limiting groove 4 and the limiting strip 5 cooperate to ensure that the operating lever 3 can only move axially inside the insertion tube 2, so as to prevent the operating lever 3 from rotating during axial movement.

[0044] All standard parts used in this invention can be purchased commercially, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0045] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The accompanying drawings of the embodiments disclosed in this invention only involve structures relevant to the embodiments disclosed in this invention. Other structures can be referred to with common designs. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

Claims

1. A urological stone grasping device, characterized in that, include: Handle (1), a tube (2) is fixedly connected to the handle (1), an operating rod (3) is slidably connected in the tube (2), and an internal thread (14) is provided on the inner wall of the end of the tube (2). The unidirectional rotating assembly (7) includes a mounting shell (71) rotatably connected inside the cannula (2) and a locking block (72) fixedly connected to the mounting shell (71). The end of the operating rod (3) is inserted into the mounting shell (71), and a threaded groove (6) is provided on the surface of the end. The end of the mounting shell (71) is fixedly connected to the locking block (72) that is locked inside the threaded groove (6). Two clamping rings (8) are provided, and the two clamping rings (8) are arranged at both ends of the mounting shell (71) and are rotatably connected to the insertion tube (2); The mounting rod (9) is slidably connected inside the insertion tube (2), and one end of the insertion tube (2) is inserted into the mounting shell (71), and the other end is fixedly connected to a ring (10). A spring (11) is fixedly connected between the ring (10) and a clamping ring (8). A clamping claw (12) is hinged on the ring (10), and a bent abutment (13) is fixedly connected between the clamping claw (12) and the ring (10).

2. The urological stone grasping device according to claim 1, characterized in that: The unidirectional rotating assembly (7) also includes a plurality of mounting grooves (73) arranged in a ring array on the inner wall of the mounting housing (71). The inner wall of the mounting groove (73) is fixedly connected to a stop block (74) and a retaining strip (76). A rotating roller (75) is provided in the mounting groove (73). The rotating roller (75) is engaged between the stop block (74) and the retaining strip (76). The stop block (74) is configured to deform and narrow after being squeezed by the rotating roller (75), so that the rotating roller (75) disengages from the retaining strip (76). One end of the mounting rod (9) inserted into the mounting housing (71) abuts against the rotating roller (75).

3. A urological stone grasping device according to claim 2, characterized in that: The abutment (74) is composed of a straight plate and two inclined plates spliced ​​together in a K-shape, and the straight plate is fixedly connected to the inner wall of the mounting groove (73), and the end of the inclined plate abuts against the rotating roller (75).

4. A urological stone grasping device according to claim 3, characterized in that: The mounting groove (73) is arranged in an isosceles trapezoidal shape in the radial direction of the mounting shell (71), and the abutment (74) is installed on the wide side of the mounting groove (73), and the retaining strip (76) is installed on the narrow side of the mounting groove (73).

5. A urological stone grasping device according to claim 3, characterized in that: The mounting groove (73) is projected in a right-angled trapezoidal shape on the axial direction of the mounting shell (71), and the abutment (74) is installed on the wide side of the mounting groove (73), and the retaining strip (76) is installed on the narrow side of the mounting groove (73).

6. A urological stone grasping device according to claim 3, characterized in that: The abutment (74) is made of plastic, and the roller (75) is made of steel.

7. A urological stone grasping device according to claim 1, characterized in that: The operating lever (3) is provided with an axially arranged limiting groove (4), and the inner wall of the insertion tube (2) is fixedly connected with a limiting strip (5) inserted into the limiting groove (4).

8. A urological stone grasping device according to claim 1, characterized in that: The end of the cannula (2) is narrowed into a spherical shape.

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