A lithotomy basket with built-in fiber channel

Abstract

The utility model discloses a kind of stone extraction net basket of built-in optical fiber channel, including handle and multiple net basket filaments, further include guide tube assembly, guide tube assembly includes outer tube and inner tube, outer tube is set in the outside of inner tube, outer tube is connected between inner tube by connecting piece, net basket control channel is equipped between outer tube and inner tube, the first end of net basket filament is stretched out through net basket control channel, the first end of multiple net basket filaments is bent and connected together to form net basket part, control assembly is slidably arranged in handle, the second end of multiple net basket filaments is connected with control assembly, control assembly controls net basket part to switch between the state of being stretched and being gathered, inner tube is equipped with first optical fiber channel, handle is equipped with second optical fiber channel, second optical fiber channel is coaxially communicated with first optical fiber channel, the outlet of first optical fiber channel is located in the center of net basket part, laser optical fiber is stretched out through the channel built-in in stone extraction net basket, without needing to exit stone extraction net basket, save the operation time, reduce the risk in operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a stone retrieval basket with a built-in optical fiber channel. Background Technology

[0002] Stone retrieval baskets are commonly used in the medical field, such as in urology or biliary surgery, to retrieve stones.

[0003] Ureteroscopic lithotripsy is currently the mainstream minimally invasive procedure for treating urinary tract stones. It involves using a ureteroscope's internal operating channel to fragment and remove stones. Fragmentation and retrieval require separate instruments: a holmium laser fiber and a stone retrieval basket. However, in current technology, the laser fiber and the stone retrieval basket share the same operating channel. During the procedure, the stone retrieval basket is first used to move the stone to a suitable position, then the basket is removed from the operating channel and replaced with the holmium laser fiber to fragment the stone. After fragmentation, the basket is replaced again to remove the fragments. If the laser fragmentation is unsatisfactory, or if the fragments are too large to be removed using the basket, the laser fiber must be replaced again for further fragmentation. If the fragments escape to a location where further fragmentation is difficult, multiple instrument changes may be necessary. This not only significantly prolongs the procedure time but also increases the risks, posing a potential threat to patient safety and surgical outcomes. Therefore, improvement is necessary. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a stone retrieval basket with a built-in optical fiber channel. This basket has a simple and reasonable structure and is easy to operate. The laser fiber can extend through the second and first optical fiber channels built into the stone retrieval basket without needing to be removed from the basket, thus saving surgical time and reducing intraoperative risks.

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

[0006] This utility model discloses a stone retrieval basket with a built-in optical fiber channel, comprising a handle and multiple basket wires, the basket wires being elastic. It also includes a guide tube assembly connected to the handle, comprising an outer tube and an inner tube. The outer tube is sleeved outside the inner tube, and a connecting part is fixedly connected between the outer and inner tubes. A basket control channel is provided through the outer and inner tubes. The first end of each basket wire passes through the basket control channel and extends out of its outlet. The first ends of the multiple basket wires are bent and connected together to form a basket section. A control component is slidably disposed within the handle along its axial direction. The second ends of the multiple basket wires are connected to the control component. By driving the control component, the basket wires are controlled to slide within the basket control channel, allowing the basket section to switch between an open and closed state. A first optical fiber channel for optical fiber passage is provided through the inner tube along its axial direction, and a second optical fiber channel for optical fiber passage is provided through the handle along its axial direction. The outlet of the second optical fiber channel is coaxially connected to the inlet of the first optical fiber channel, and the outlet of the first optical fiber channel is located at the center of the basket section.

[0007] Furthermore, the outer tube and the inner tube are arranged coaxially.

[0008] Furthermore, the second ends of multiple basket wires are connected together to form a basket connector, which is arranged in a ring shape and is connected to the control component.

[0009] Furthermore, the handle is provided with a sliding groove along its axial direction, and the control component includes a sliding sleeve and a control switch. The sliding sleeve is slidably disposed inside the handle along its axial direction, and the second optical fiber channel is provided inside the sliding sleeve. The sliding sleeve is fixedly connected to the net basket connecting seat. The control switch is disposed in the sliding groove and fixedly connected to the sliding sleeve. The control switch slides in cooperation with the sliding groove. By pushing the control switch to slide along the sliding groove, the net basket can be switched between an open state and a retracted state.

[0010] Furthermore, the basket wire is made of shape memory metal.

[0011] Furthermore, the connecting portion is arranged circumferentially along the inner tube.

[0012] Furthermore, a flexible protective sleeve is provided at the exit of the first optical fiber channel. The flexible protective sleeve includes several elastic baffles. The fixed end of the elastic baffle is fixedly disposed circumferentially on the outer edge of the exit of the first optical fiber channel. The free end of the elastic baffle retracts inward and covers the exit of the first optical fiber channel in its natural state. When the optical fiber extends, it pushes the free end of the elastic baffle to unfold outward to allow the optical fiber to pass through. When the optical fiber retracts, the elastic baffle returns to its original state by its elasticity and retracts to cover the exit of the first optical fiber channel.

[0013] The beneficial effects of this utility model are as follows: The stone retrieval basket with built-in optical fiber channel described in this utility model can be applied to ureteroscopic lithotripsy. Stones are fragmented and retrieved through the operating channel built into the ureteroscope. The stone retrieval basket is inserted into the stone location through the ureteroscope. The basket is opened and grasped by the handle, and the stone is moved to the appropriate position. Then, the laser fiber extends through the second and first optical fiber channels built into the stone retrieval basket, is aimed at the stone, and laser lithotripsy is initiated to pulverize the stone. After fragmentation, the basket is tightened, and the stone fragments are directly removed. The stone retrieval basket does not need to be removed during the operation, greatly saving surgical time and reducing intraoperative risks. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial cross-sectional structural schematic diagram of this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the guide tube assembly;

[0017] Figure 4 This is a schematic diagram of the guide tube assembly;

[0018] Figure 5 This is a schematic diagram of the handle and the wire mesh.

[0019] Figure 6 This is a cross-sectional structural diagram of the guide tube assembly and the sliding sleeve.

[0020] Figures 1-6 In the middle: 1. Handle; 12. Slide groove; 13. Sliding sleeve; 131. Second optical fiber channel; 14. Control switch; 2. Net basket wire; 21. Net basket part; 22. Net basket connecting seat; 3. Guide tube assembly; 31. Outer tube; 32. Inner tube; 321. First optical fiber channel; 3211. Elastic baffle; 33. Net basket control channel; 34. Connecting part; 4. Laser optical fiber. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1-6 The illustrated stone retrieval basket with a built-in fiber optic channel includes a handle 1 and multiple basket wires 2, the basket wires 2 being elastic. It also includes a guide tube assembly 3 connected to the handle 1. (See attached image.) Figure 3The guide tube assembly 3 includes an outer tube 31 and an inner tube 32. The outer tube 31 is sleeved on the outside of the inner tube 32. A connecting part 34 is fixedly connected between the outer tube 31 and the inner tube 32 to ensure a stable and reliable connection between the two. Preferably, in this embodiment, the connecting part 34 is arranged along the circumference of the inner tube 32. (See reference...) Figure 4 A gap is formed between the outer tube 31 and the inner tube 32, and a basket control channel 33 is provided through it. The first ends of multiple basket wires 2 pass through the basket control channel 33 and extend out of the outlet of the basket control channel 33. The first ends of the multiple basket wires 2 are bent and connected together to form a basket part 21 for grasping stones. A control component is slidably disposed inside the handle 1 along its axial direction. The second ends of the multiple basket wires 2 are connected to the control component. By driving the control component, the basket wires 2 are controlled to slide within the basket control channel 33, so that the basket part 21 switches between an open state and a closed state for grasping or releasing stones. A first optical fiber channel 321 for the laser optical fiber 4 to pass through is provided inside the inner tube 32 along its axial direction. (See reference) Figure 6 The handle 1 has a second optical fiber channel 131 that passes through it along its axial direction for the laser optical fiber 4 to pass through. The outlet of the second optical fiber channel 131 is coaxially connected to the inlet of the first optical fiber channel 321 to facilitate the smooth passage of the laser optical fiber 4. The outlet of the first optical fiber channel 321 is located at the center of the basket 21. After the basket 21 grabs the stone, the laser optical fiber 4 extends and aligns with the stone to start laser lithotripsy. After the lithotripsy is completed, the basket 21 is tightened and the stone fragments are directly removed.

[0023] Preferably, in this embodiment, the basket wire 2 is made of shape memory metal. Shape memory metal has good shape memory and elastic recovery ability, and can restore its original shape after deformation. In addition, shape memory metal has good fatigue resistance and durability. Even when the basket part 21 is repeatedly opened and closed, it still maintains stable performance and can effectively extend its service life.

[0024] Preferably, in this embodiment, the laser fiber 4 is a holmium laser fiber 4, which can efficiently crush stones.

[0025] This invention can be applied to ureteroscopic lithotripsy. The procedure involves using the built-in operating channel of the ureteroscope to fragment and remove stones. A stone retrieval basket is inserted through the ureteroscope to the stone location. The basket section 21 is opened and grasped by the handle 1, moving the stone to a suitable position. Then, a laser fiber 4 extends through the second fiber optic channel 131 and the first fiber optic channel 321 built into the stone retrieval basket, is aimed at the stone, and laser lithotripsy is initiated to pulverize the stone. After fragmentation, the basket section 21 is tightened, and the stone fragments are directly removed. The procedure does not require removing the stone retrieval basket, significantly saving surgical time and reducing intraoperative risks.

[0026] Preferably, in this embodiment, refer to Figure 3The outer tube 31 and the inner tube 32 are coaxially arranged, which makes the structure more compact. The coaxial structure design reduces eccentric forces and helps to improve service life.

[0027] Preferably, in this embodiment, refer to Figure 5 The second ends of multiple basket wires 2 are connected together to form a basket connecting seat 22. The basket connecting seat 22 is arranged in a ring shape. The basket connecting seat 22 is connected to the control component. The control component can drive multiple basket wires 2 to move synchronously and in a coordinated manner by controlling the basket connecting seat 22, so as to avoid the basket part 21 from jamming or deforming due to the asynchrony of a single basket wire 2.

[0028] Preferably, in this embodiment, refer to Figure 5 The handle 1 has a sliding groove 12 along its axial direction. The control component includes a sliding sleeve 13 and a control switch 14. The sliding sleeve 13 is slidably disposed in the handle 1 along its axial direction. The second optical fiber channel 131 is provided in the sliding sleeve 13. The sliding sleeve 13 is fixedly connected to the net basket connecting seat 22. The control switch 14 is disposed in the sliding groove 12 and fixedly connected to the sliding sleeve 13. The control switch 14 is slidably engaged with the sliding groove 12. By pushing the control switch 14 to slide along the sliding groove 12, the sliding sleeve 13 is driven to slide in the handle 1, thereby pushing the net basket connecting seat 22, so that the net basket part 21 switches between the open state and the closed state.

[0029] Preferably, in this embodiment, refer to Figure 4 The outlet of the first optical fiber channel 321 is provided with a flexible protective sleeve. The flexible protective sleeve includes several elastic baffles 3211. The fixed end of the elastic baffle 3211 is fixedly disposed circumferentially on the outer edge of the outlet of the first optical fiber channel 321 to ensure stable and reliable connection. The free end of the elastic baffle 3211 retracts inward and covers the outlet of the first optical fiber channel 321 in its natural state. When the laser fiber 4 extends, it can push the free end of the elastic baffle 3211 to unfold outward, thereby providing sufficient space for the smooth passage of the laser fiber 4. When the laser fiber 4 retracts, the elastic baffle 3211 will rely on its elasticity to restore its original shape, retract and cover the outlet of the first optical fiber channel 321, which can effectively prevent gravel from falling into the first optical fiber channel 321, blocking the channel and affecting its use.

[0030] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A stone-collecting basket with a built-in fiber optic channel, comprising a handle (1) and multiple basket wires (2), wherein the basket wires (2) are elastic, characterized in that: It also includes a guide tube assembly (3) connected to the handle (1). The guide tube assembly (3) includes an outer tube (31) and an inner tube (32). The outer tube (31) is sleeved on the outside of the inner tube (32). A connecting part (34) is fixedly connected between the outer tube (31) and the inner tube (32). A basket control channel (33) is provided between the outer tube (31) and the inner tube (32). The first end of the basket wire (2) passes through the basket control channel (33) and extends out of the outlet of the basket control channel (33). The first ends of multiple basket wires (2) are bent and connected together to form a basket part (21). The handle (1) is slidably provided with a guide tube assembly (3) along its axial direction. The control component connects the second end of multiple basket wires (2) to the control component. By driving the control component, the basket wires (2) are controlled to slide in the basket control channel (33) so that the basket part (21) switches between the open state and the closed state. The inner tube (32) is provided with a first optical fiber channel (321) for optical fiber to pass through along its axial direction. The handle (1) is provided with a second optical fiber channel (131) for optical fiber to pass through along its axial direction. The outlet of the second optical fiber channel (131) is coaxially connected with the inlet of the first optical fiber channel (321). The outlet of the first optical fiber channel (321) is located at the center of the basket part (21).

2. The stone-collecting basket with a built-in optical fiber channel according to claim 1, characterized in that: The outer tube (31) and the inner tube (32) are arranged coaxially.

3. The stone-collecting basket with a built-in optical fiber channel according to claim 1, characterized in that: The second ends of multiple basket wires (2) are connected together to form a basket connector (22), which is arranged in a ring shape and is connected to the control component.

4. The stone-collecting basket with a built-in optical fiber channel according to claim 3, characterized in that: The handle (1) is provided with a groove (12) along its axial direction. The control component includes a sliding sleeve (13) and a control switch (14). The sliding sleeve (13) is slidably disposed in the handle (1) along its axial direction. The second optical fiber channel (131) is provided in the sliding sleeve (13). The sliding sleeve (13) is fixedly connected to the net basket connecting seat (22). The control switch (14) is disposed in the groove (12) and fixedly connected to the sliding sleeve (13). The control switch (14) is slidably engaged with the groove (12). By pushing the control switch (14) to slide along the groove (12), the net basket part (21) can be switched between the open state and the closed state.

5. A stone-collecting basket with a built-in optical fiber channel according to claim 1, characterized in that: The basket wire (2) is made of shape memory metal.

6. A stone-collecting basket with a built-in optical fiber channel according to claim 1, characterized in that: The connecting part (34) is arranged circumferentially along the inner tube (32).

7. A stone-collecting basket with a built-in optical fiber channel according to claim 1, characterized in that: The first optical fiber channel (321) has a flexible protective sleeve at its outlet. The flexible protective sleeve includes several elastic baffles (3211). The fixed end of the elastic baffle (3211) is fixedly disposed circumferentially on the outer edge of the outlet of the first optical fiber channel (321). The free end of the elastic baffle (3211) is retracted inward and covers the outlet of the first optical fiber channel (321) in its natural state. When the optical fiber extends, it pushes the free end of the elastic baffle (3211) to unfold outward to allow the optical fiber to pass through. When the optical fiber retracts, the elastic baffle (3211) returns to its original state by its elasticity and retracts to cover the outlet of the first optical fiber channel (321).

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