A ureterolithotomy basket

Abstract

This invention discloses a ureterolithotomy basket, comprising a basket woven from nickel-titanium wire, with a sheath fitted around the outside of the nickel-titanium wire. The nickel-titanium wire enters from the tail end of the sheath and exits from the front end of the sheath. After being woven into a basket at the front end of the sheath, it re-enters from the front end of the sheath and exits from the tail end. A handle is connected to the tail end of the sheath. The handle moves the sheath to push out and open the basket. Pushing the sliding knob backward moves the travel block and travel groove to a stop block. At this point, the nickel-titanium wire and travel block move the sheath backward, pushing out and opening the nickel-titanium wire at the basket. The basket is in its first state, an open-type opening that will not fall off after trapping a foreign object. Pushing the sliding knob backward again moves the travel block, compressing the spring and moving it backward. A straight steel pipe enters the travel block, with both ends of the nickel-titanium wire remaining stationary. The travel block moves the sheath backward, and the basket is in its second state.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a ureterolithotomy basket. Background Technology

[0002] Urinary tract stones are a common disease in urology, and stone retrieval baskets are essential instruments for stone removal surgery. However, the stone retrieval baskets currently used clinically often have a small and fixed opening, making it difficult to release stones or foreign bodies after retrieval. This is especially problematic in certain situations, such as when large stones located under the renal calyces need to be moved to a suitable position before laser lithotripsy. The small opening of the basket makes it difficult to release the large stone, leading to prolonged surgery time, inconvenience in the procedure, and dissatisfaction from both patients and doctors.

[0003] Boston Scientific's US patent US09936964B2 - Retrieving devices and related methods of use - describes a stone retrieval basket that is a two-stage opening basket. It can further expand the opening of a regular stone retrieval basket and can effectively solve the difficulty of releasing large stones. However, the handle of this product is relatively complex. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a ureterolithotomy basket, comprising a basket made of nickel-titanium wire, with a sheath sleeve fitted on the outside of the nickel-titanium wire. The nickel-titanium wire enters from the tail end of the sheath and exits from the front end of the sheath. After being woven into a basket by exiting from the front end of the sheath, the wire re-enters from the front end of the sheath and exits from the tail end of the sheath. A handle is connected to the tail end of the sheath, and the handle moves the sheath to push out and open the basket.

[0005] Preferably, the basket is made of three nickel-titanium wires, with the middle of the nickel-titanium wires bent to form a ring structure, and the ring structure of the three nickel-titanium wires is woven into the basket.

[0006] Preferably, the sheath has a built-in sleeve for holding the nickel-titanium wire.

[0007] Preferably, the handle has a hole for sliding the sheath, the handle is equipped with a sliding knob, and the handle has a hole for moving the sliding knob.

[0008] Preferably, the handle has an internal cavity, and a stroke block is disposed within the cavity.

[0009] Preferably, the stroke block is fixedly connected to a sliding torque, the stroke block is fixedly connected to a sheath, a through hole for passing a nickel-titanium wire is opened in the stroke block, and a straight steel pipe and a bent steel pipe are installed in the through hole at the end of the stroke block away from the sheath.

[0010] Preferably, the straight steel pipe extends to the end of the handle, the straight steel pipe is slidably connected to the stroke block, and the straight steel pipe is used to fix one end of the nickel-titanium wire.

[0011] Preferably, the bent steel pipe is used to fix the stroke block, and the bent steel pipe is used to fix the other end of the nickel-titanium wire.

[0012] Preferably, the handle has a rear stop at its tail end, and a travel groove is provided between the rear stop and the travel block.

[0013] Preferably, a spring is provided in the groove structure near the travel block of the travel groove, and holes for inserting straight steel pipes are provided inside both the travel groove and the rear stop block.

[0014] The technical effects and advantages of this invention are as follows:

[0015] 1. Push the sliding knob backward to move the travel block and travel groove to the rear stop. At this time, the nickel-titanium wire and travel block move the sheath backward, and the nickel-titanium wire at the basket is pushed out and opened. The basket is in the first state. The basket is opened in an open manner and will not fall off after trapping the foreign object.

[0016] 2. Push the sliding torque backward again, the stroke block compresses the spring and moves backward, the straight steel pipe enters the stroke block, both ends of the nickel-titanium wire remain stationary, the stroke block drives the sheath to move backward, the basket is in the second state, the basket opens for the second time, the stone is lowered, the trapped stones or foreign objects are easily released, and laser lithotripsy is performed. This stone retrieval basket has a simple structure and is easy to use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the ureteral stone retrieval basket structure provided in the embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the internal structure of the sheath in the ureterolithotomy basket provided in this application embodiment;

[0019] Figure 3 This is a schematic diagram of the ureterolithotomy basket in its first state, as provided in the embodiments of this application.

[0020] Figure 4 This is a schematic diagram of the internal structure of the ureterolithotomy basket with the handle in the first state provided in the embodiments of this application;

[0021] Figure 5 This is a schematic diagram of the ureterolithotomy basket provided in this application, with the handle in the first state;

[0022] Figure 6 This is a schematic diagram of the ureterolithotomy basket in the second state provided in the embodiments of this application;

[0023] Figure 7 This is a schematic diagram of the internal structure of the ureterolithotomy basket with the handle in the second state provided in the embodiments of this application;

[0024] Figure 8 This is a schematic diagram of the ureterolithotomy basket provided in this application, with the handle in the second state;

[0025] Figure 9 The ureteral stone retrieval basket provided in the embodiments of this application Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0026] In the diagram: 10. Net basket; 11. Nickel-titanium wire; 12. Sleeve; 20. Sheath; 30. Handle; 31. Bending steel pipe; 32. Straight steel pipe; 33. Sliding torsion; 34. Spring; 35. Back stop; 36. Stroke groove; 37. Stroke block. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0028] Please see Figure 1 This embodiment provides a ureterolithotomy basket, including a basket 10. The basket 10 is woven from three nickel-titanium wires 11. Each nickel-titanium wire 11 is bent in the middle to form a ring structure. The ring structure of the three nickel-titanium wires 11 is woven into the basket 10. When the basket 10 is opened, the ring structure of the nickel-titanium wires 11 gradually opens. A sheath 20 is fitted on the outside of the nickel-titanium wires 11. The nickel-titanium wires 11 are inserted from the tail end of the sheath 20 and exit from the front end of the sheath 20. After exiting from the front end of the sheath 20 and weaving into the basket 10, they are inserted again from the front end of the sheath 20 and exit from the tail end of the sheath 20, forming six nickel-titanium wires 11 inside the sheath 20. The tail end of the sheath 20 is connected to a handle 30, and the handle 30 has a hole for sliding the sheath 20.

[0029] Please see Figure 2 The sheath 20 has two sleeves 12. One sleeve 12 clamps the three nickel-titanium wires 11 that are inserted into the tail end of the sheath 20 into a bundle, and the other sleeve 12 clamps the three nickel-titanium wires 11 that are inserted into the tail end of the sheath 20 into a bundle. The six nickel-titanium wires 11 are clamped into two bundles by the two sleeves 12, which avoids knotting caused by too many nickel-titanium wires 11 in the sheath 20.

[0030] Please see Figure 4 The handle 30 is equipped with a sliding knob 33, and the handle 30 has a hole for the sliding knob 33 to move. A cavity is provided inside the handle 30, and a travel block 37 is located within the cavity. The travel block 37 is fixedly connected to the sliding knob 33 and the sheath tube 20. A through hole for the nickel-titanium wire 11 to pass through is provided inside the travel block 37. A straight steel pipe 32 and a bent steel pipe 31 are installed in the through hole at the end of the travel block 37 away from the sheath tube 20. The straight steel pipe 32 extends to the tail end of the handle 30 and is slidably connected to the travel block 37. The straight steel pipe 32 is used to fix one end of the nickel-titanium wire 11. 31 is fixedly connected to the stroke block 37. The bent steel pipe 31 is used to fix the other end of the nickel-titanium wire 11. The nickel-titanium wire 11 passes through the stroke block 37 and the sheath tube 20. After being woven into a net basket 10 at the front end of the sheath tube 20, it is then passed into the sheath tube 20 and the stroke block 37 and enters the bent steel pipe 31 to form an openable structure of the net basket 10. The handle 30 is provided with a rear stop block 35 at the tail end. A stroke groove 36 is provided between the rear stop block 35 and the stroke block 37. A spring 34 is provided in the groove structure of the stroke groove 36 near the stroke block 37. Holes for inserting straight steel pipes 32 are opened inside the rear stop block 35 and the stroke groove 36.

[0031] Please see Figure 3 , Figure 4 and Figure 5 Push the sliding knob 33 backward to move it, which will cause the stroke block 37 and the stroke groove 36 to move to the rear stop block 35 and stop. At this time, the nickel-titanium wire 11 and the stroke block 37 will cause the sheath tube 20 to move backward, and the nickel-titanium wire 11 at the net basket 10 will be pushed out and opened, and the net basket 10 will be in the first state.

[0032] Please see Figure 6 , Figure 7 , Figure 8 and Figure 9 Push the sliding torque 33 backward again, the stroke block 37 compresses the spring 34 and moves backward, the straight steel tube 32 enters the stroke block 37, both ends of the nickel-titanium wire 11 remain stationary, the stroke block 37 drives the sheath tube 20 to move backward, and the basket 10 is in the second state.

[0033] The working principle of this invention is:

[0034] Pushing the sliding knob 33 backward moves the travel block 37 and travel groove 36 to the rear stop block 35. At this time, the nickel-titanium wire 11 and the travel block 37 move the sheath tube 20 backward, and the nickel-titanium wire 11 at the basket 10 is pushed out. The basket 10 is in the first state, and the basket 10 is open. After the foreign object is caught, it will not fall off. Pushing the sliding knob 33 backward again moves the travel block 37 compresses the spring 34 and moves it backward. The straight steel tube 32 enters the travel block 37. Both ends of the nickel-titanium wire 11 remain stationary. The travel block 37 moves the sheath tube 20 backward, and the basket 10 is in the second state. The basket 10 opens for the second time, and the stone is put down for laser stone crushing. This stone retrieval basket can be opened twice, and the basket 20 is open. After the foreign object is caught, it will not fall off.

[0035] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A ureterolithotomy basket, comprising a basket (10), said basket (10) being woven from nickel-titanium wire (11), said nickel-titanium wire (11) having a sheath (20) fitted on its outer side, characterized in that, The nickel-titanium wire (11) enters from the tail end of the sheath (20) and exits from the front end of the sheath (20). After being woven into a net basket (10) at the front end of the sheath (20), it enters again from the front end of the sheath (20) and exits from the tail end of the sheath (20). The tail end of the sheath (20) is connected to a handle (30). The handle (30) drives the sheath (20) to move to push out and open the net basket (10). The handle (30) has a cavity inside, and a travel block (37) is provided in the cavity. The travel block (37) is fixedly connected to a sliding knob (33) and the sheath (20). The travel block (37) has a through hole for the nickel-titanium wire (11) to pass through. A straight steel pipe (32) and a bent steel pipe (31) are installed in the through hole at the end of the travel block (37) away from the sheath (20). The handle (30) has a hole for sliding the sheath (20), the handle (30) is equipped with a sliding knob (33), and the handle (30) has a hole for moving the sliding knob (33); The straight steel pipe (32) extends to the end of the handle (30), the straight steel pipe (32) is slidably connected to the stroke block (37), and the straight steel pipe (32) is used to fix one end of the nickel-titanium wire (11); The bent steel pipe (31) is fixedly connected to the stroke block (37), and the bent steel pipe (31) is used to fix the other end of the nickel-titanium wire (11).

2. The ureterolithotomy basket according to claim 1, characterized in that, The basket (10) is made of three nickel-titanium wires (11), the nickel-titanium wires (11) are bent in the middle to form a ring structure, and the ring structure of the three nickel-titanium wires (11) is woven into the basket (10).

3. The ureterolithotomy basket according to claim 1, characterized in that, The sheath (20) has a built-in sleeve (12) for holding the nickel-titanium wire (11).

4. The ureterolithotomy basket according to claim 1, characterized in that, The handle (30) is provided with a rear stop (35) at its tail end, and a stroke groove (36) is provided between the rear stop (35) and the stroke block (37).

5. A ureterolithotomy basket according to claim 4, characterized in that, A spring (34) is provided in the groove structure of the travel groove (36) near the travel block (37). The travel groove (36) and the rear stop block (35) are both provided with holes for the insertion of straight steel pipes (32).

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