Mesh basket part of calculus removing mesh basket and calculus removing mesh basket system

Abstract

The utility model relates to the technical field of medical instruments, in particular to a mesh basket part of a calculus removing mesh basket and a calculus removing mesh basket system.The mesh basket part comprises a connecting part, and the connecting part is connected with a traction part of the calculus removing mesh basket system so as to drive the mesh basket part of the calculus removing mesh basket to act; the main supporting arm is a main body part of the mesh basket part; one ends of the main supporting arms are connected with the connecting part, and the other ends of the main supporting arms are connected in a matched mode to form a net basket part.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a stone retrieval basket and a stone retrieval basket system. Background Technology

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) requires the use of a stone retrieval basket to remove stones from the bile duct or pancreatic duct. When a stone becomes lodged in the basket, the operator may be unable to withdraw the basket beyond the duodenal papilla. In such cases, it is necessary to replace the metal sheath, pull the basket component to break the front basket wire, thereby releasing or pulverizing the stone.

[0003] In existing technologies, such as the medical retrieval device with a fragile basket disclosed in patent publication number US7678119B2, the connection points of adjacent support arms of the fragile basket are made of fragile material. When a preset force is applied to the basket, at least one support arm can separate from the other support arms, thereby releasing or crushing the stone. However, because the shape of the stone is unknown and the contact point between the basket wires and the stone is unclear, the stone may not be able to escape from the basket after the basket is subjected to force and a wire breaks. Moreover, in the aforementioned fragile basket in the prior art, the basket will break directly when the tensile force reaches a preset value. This makes the stone retrieval process inconvenient and without feedback, and it is impossible to determine whether the embedment is due to the size of the stone or other reasons that caused the basket breakage. Therefore, those skilled in the art urgently need a new stone retrieval basket to overcome the problem that the actual location of the broken wire cannot be determined after the stone retrieval basket is subjected to force, and that the operator cannot feel the force feedback of the stone retrieval basket during the entire stone retrieval process, and cannot determine whether the stone is impacted due to the size of the stone or due to other reasons, which in turn makes it impossible for the operator to withdraw the basket outside the duodenal papilla. Utility Model Content

[0004] This utility model aims to provide a stone retrieval basket to solve the problems in existing technologies where the stone remains embedded after the basket breaks under stress, and where there is a lack of force feedback throughout the stone retrieval process. To this end, this utility model provides a basket portion for a stone retrieval basket, comprising:

[0005] The connecting part is connected to the traction part of the stone retrieval basket system to drive the basket part of the stone retrieval basket to move.

[0006] The main support arm is the main body of the basket; one end of the main support arm is connected to the connecting part.

[0007] The sub-support structure is connected to the other end of the main support arm and is used to connect the main support arm to form the basket section. The sub-support structure is provided with a fracture section for the basket to break. The sub-support structure has deformation. During the stretching process, the main support arm drives the sub-support structure to deform until the fracture section on the sub-support structure breaks and opens the basket section. As the deformation of the sub-support structure gradually increases, it provides a stable and changing feedback force to the main support arm.

[0008] Optionally, the sub-support structure is an elastic ring fixedly connected to the main support arm, and the fracture part is an opening provided on the elastic ring.

[0009] When the supporting structure is subjected to stress and deforms, the fractured part deforms and fractures when it reaches the deformation limit, and the stone falls out of the basket.

[0010] Optionally, there may be multiple fracture sections, located on the sub-support structure between adjacent main support arms.

[0011] Optionally, the sub-support structure consists of a first sub-support arm with elasticity. The main support arm drives the first sub-support arm to deform, changing the force direction of the sub-support structure. This causes the fractured part to experience increased force along the line connecting the far ends of the adjacent main support arms, resulting in the fracture of the fractured part.

[0012] Optionally, the sub-support structure is a cross-shaped structure composed of elastic first sub-support arms, with the fractured part located at any position on the first sub-support arm; the end of the main support arm is connected to one end of each of the two first sub-support arms, and the other end of each of the two first sub-support arms is connected to the adjacent main support arm.

[0013] Optionally, the concave position of the cross-shaped structure is the fracture portion; and / or,

[0014] The cross-section at the connection point between the first sub-support arm and the main support arm is circular, rectangular, or irregular; and / or,

[0015] A transition hole is formed at the connection position between the sub-support structure and the main support arm, which is surrounded by the adjacent first sub-support arm; the transition hole includes: a round hole, an elliptical hole, or a square hole.

[0016] Optionally, the maximum width dimension A of the first sub-support arm is less than half the width dimension B of the main support arm; and / or,

[0017] The maximum length dimension M of the sub-support structure is less than half the maximum width dimension W of the basket.

[0018] Optionally, when the basket traps the stone, the changes in the component forces F1 and F2 of the first supporting arm and the main supporting arm, as well as the angle α of the forces, conform to the Pythagorean theorem formula for the resultant force and component forces:

[0019]

[0020] During the process of the basket trapping the stone, the release force F increases at a constant rate until the fractured part breaks. F1 and F2 are the components of F. As the angle α of the force increases, the component forces F1 and F2 are larger, and the fractured part is more likely to break. That is, when the release force F increases at a constant rate, the larger the angle α of the force increases, the larger the component forces F1 and F2 are, and the greater the force transmitted to the fractured part, until the material strength limit of the supporting structure is reached.

[0021] Optionally, the sub-support structure includes: an elastic sub-support arm and a fracture sub-support arm. The elastic sub-support arm is an elastic element, and the fracture part is located in the fracture sub-support arm. The main support arm drives the elastic sub-support arm to deform, changing the force direction of the sub-support structure. The tensile force is concentrated on the fracture sub-support arm, which increases the force on the fracture sub-support arm and causes the fracture part to break.

[0022] Optionally, the elastic sub-support arm is stretched to form an arc-shaped or straight structure so that the fractured portion of the broken sub-support arm is subjected to stress; and / or,

[0023] The flexible support arm is a curved or polygonal structure; and / or,

[0024] The elastic sub-support arm and / or the fracture sub-support arm have a circular, rectangular, or irregular cross-section at the connection point with the main support arm; and / or,

[0025] The fractured portion is located at the center of the fracture support arm; and / or,

[0026] The maximum width dimension A of the elastic sub-support arm and the fracture sub-support arm is less than half the width dimension B of the main support arm; and / or,

[0027] The maximum width dimension M of the sub-support structure is less than the inner diameter N of the sheath of the stone retrieval basket system.

[0028] Optionally, the basket section is manufactured using a one-piece thermoforming process; and / or,

[0029] The supporting structure can be any shape selected from circular, arc-shaped, wavy, and rectangular; and / or,

[0030] The fracture was formed through material embrittlement treatment, which includes any one or more of the following: passivation, pickling, heat treatment, rolling cold working, and drawing cold working; and / or,

[0031] The fracture portion is formed by a fracturing structure, which includes one or more of the following: a V-shaped notch, a taper; and / or...

[0032] The connecting part includes any one of the following structures: vertical circular hole structure, concentric circular hole structure, rectangular hole structure, and straight groove hole structure.

[0033] A stone retrieval basket system includes: a basket section of the aforementioned stone retrieval basket; and,

[0034] Stone retrieval basket handle, the stone retrieval basket handle includes:

[0035] The traction section is connected to the distal end of the connecting section, away from the patient.

[0036] The push-pull part is connected to the traction part via a transmission. The far end of the push-pull part, away from the operator, is connected to the traction part, and the near end of the push-pull part, close to the operator, is connected to the push-pull handle, which is a handheld component that drives the basket part to move.

[0037] The sheath, the inner cavity of which serves as the working channel for the basket section;

[0038] The injection handle has a liquid injection port.

[0039] Optionally, the supporting structure is a basket head, which has an opening for the basket control component to pass through and connect to; and the basket control component is a tubular structure, with a guide wire passing through the basket control component, coaxially arranged with the basket control component, and extending from the head of the basket to form a through guide wire.

[0040] Optionally, the push-pull part and the traction part are connected by any one of the following methods: laser welding, feeding welding, or pressing; wherein, feeding welding uses a fusible solder, including: brazing wire, nickel-based welding wire; and / or,

[0041] The basket head is an opening formed at the head end of the basket by laser cutting.

[0042] The method for using the stone retrieval basket system includes the following steps:

[0043] S1, in the initial state, the basket part is driven by the push-pull handle, which causes the basket part to extend out of the sheath tube, and the main support arm is stretched into its original fixed state under its own elastic force.

[0044] S2, continue moving the push-pull handle to put the stone into the basket;

[0045] S3. When the stone becomes lodged in the basket section, cut off the sheath and replace it with a metal spring tube, and use a lithotripsy device to fix the traction section.

[0046] S4, fix the metal spring tube and pull the basket back to apply a force toward the stone, thereby breaking the fracture and separating the adjacent main support arms, allowing the stone to fall out of the basket.

[0047] S5: Withdraw the basket and metal spring tube together outside the duodenal papilla.

[0048] The technical solution of this utility model has the following advantages:

[0049] 1. The stone retrieval basket provided by this utility model further includes a sub-support structure. The sub-support structure is connected to the ends of multiple main support arms, and the sub-support structure cooperates with the connecting part to connect the main support arms from both ends to form the basket portion. The sub-support structure is provided with a fracture portion for achieving basket breakage. Furthermore, the sub-support structure also has deformation capacity. During ERCP, for stones of different sizes and shapes that become impacted, pulling the basket component causes the main support arms and the stone to exert force on each other, thereby achieving targeted breakage of the fracture portion in the distal region of the stone retrieval basket, reducing the risk of stone retrieval, improving the effectiveness of wire breaking after stone impaction, and reducing the difficulty of surgical operation;

[0050] Meanwhile, since the sub-support structure is located at the far end of the basket, after the sub-support structure breaks, the far end of the basket opens, and the embedded stone will come out from the opening, thus avoiding the problem of the stone not being able to come out after the basket wire breaks and still being embedded.

[0051] Furthermore, as the main support arm and the stone are subjected to force during the pulling of the basket component, the deformation of the aforementioned sub-support structure gradually increases, providing a stable and changing feedback force to the main support arm. This allows the operator to perceive and judge whether the stone impaction is due to the size of the stone or other reasons, thereby helping the operator to complete the bile duct or pancreatic duct stone removal work using the stone retrieval basket.

[0052] 2. The stone retrieval basket system provided by this utility model includes: the basket part of the above-mentioned stone retrieval basket; therefore, the stone retrieval basket system has all the advantages of the basket part.

[0053] 3. The stone retrieval basket system provided by this utility model has an opening at the head of the basket for the basket control component to pass through and connect thereto; and the basket control component is a tubular structure, with a guide wire passing through the basket control component and coaxially arranged with the basket control component, extending from the head of the basket to form a through guide wire.

[0054] In existing technologies, the guidewire and basket control are arranged parallel to each other within the sheath; their axes are parallel. In contrast, the basket control in this invention is a tube, with the basket head being a cut end opening of the tube. The guidewire is housed within the basket control, coaxially aligned with it, and can extend directly from the opening at the basket head. This coaxial arrangement of the basket control and guidewire improves the guidewire's centering performance, thereby enhancing its guidance and increasing insertion success rate. Furthermore, the guidewire's insertion smoothness is improved because it is located within the basket control. Attached Figure Description

[0055] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0056] Figure 1 A schematic diagram of the stone retrieval basket system provided by this utility model;

[0057] Figure 2 A schematic diagram of the basket structure in Embodiment 1 provided by this utility model;

[0058] Figure 3 A three-dimensional structural diagram of a stone embedded in a stone retrieval basket in Embodiment 1 provided by this utility model;

[0059] Figure 4 In Embodiment 1 provided by this utility model, after the basket catches the stone and becomes stuck, a schematic diagram of the state in which the push-pull handle is driven to tighten the basket.

[0060] Figure 5 In Embodiment 1 provided by this utility model, the traction force on the basket gradually increases from the stone axis downwards, and the main support arm drives the sub-support structure to deform after being subjected to force. The schematic diagram shows the state of deformation of the fractured part in the area.

[0061] Figure 6 In Embodiment 1 provided by this utility model, the traction force on the basket gradually increases from the stone axis downwards, and the fractured part on the sub-support structure reaches the deformation limit and fractures, resulting in the stone falling out of the basket.

[0062] Figure 7 A three-dimensional structural diagram of the stone detaching from the basket section in Embodiment 1 provided for this utility model;

[0063] Figure 8 A schematic diagram of the basket structure in Embodiment 2 provided for this utility model;

[0064] Figure 9 In Embodiment 2 provided for this utility model, a structural diagram showing the deformation of the first supporting arm of the basket after being subjected to force is provided.

[0065] Figure 10 In Embodiment 2 provided by this utility model, a schematic diagram of the state in which the fractured part on the first sub-support arm of the basket reaches the deformation limit and fractures, and the stone falls out of the basket.

[0066] Figure 11In Embodiment 2 provided for this utility model, a schematic diagram shows the changes in structure and force direction of the basket before and after being subjected to traction force;

[0067] Figure 12 A schematic diagram of the basket structure in Embodiment 3 provided for this utility model;

[0068] Figure 13 In Embodiment 3 provided by this utility model, a schematic diagram of the structure of the elastic support arm of the basket deforming under force is provided.

[0069] Figure 14 In Embodiment 3 provided by this utility model, the fractured part of the support arm of the basket reaches the deformation limit and fractures, and the stone falls out of the basket.

[0070] Figure 15 In Embodiment 3 provided for this utility model, a schematic diagram shows the changes in structure and force direction of the basket before and after being subjected to traction force;

[0071] Figure 16 A schematic diagram of the overall structure of the stone retrieval basket system provided by this utility model;

[0072] Figure 17 A schematic diagram of the through-wire structure of the basket section provided by this utility model.

[0073] Explanation of reference numerals in the attached figures:

[0074] 1-Connecting part; 2-Traction part; 3-Basket part; 4-Main support arm; 5-Sub-support structure; 6-Fracturing part; 7-Stone; 8-Sub-support arm; 9-Transition hole; 10-Elastic sub-support arm; 11-Fracturing sub-support arm; 12-Second sub-support arm; 13-Push-pull part; 14-Push-pull handle; 15-Sheath tube; 16-Injection handle; 17-Basket control component; 18-Guide wire; 19-Metal spring tube. Detailed Implementation

[0075] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0076] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0077] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0078] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0079] Example 1

[0080] See Figure 16 , Figure 16 A schematic diagram of the overall structure of the stone-collecting basket system in an embodiment of this utility model is shown.

[0081] This utility model provides a stone retrieval basket system, which includes: a stone retrieval basket handle and a basket part. The stone retrieval basket handle is motive-connected to the basket part. The stone retrieval basket handle is used to control the basket part to switch between a contracted state and an expanded state. The basket part is used to retrieve stones and other foreign objects.

[0082] In one embodiment of the utility model, the stone retrieval basket handle includes a traction part 2), a push-pull part 13), a sheath 15, and an injection handle 16.

[0083] The traction part 2 has a slender structure to connect the basket part 3 and the push-pull part 13. The proximal end of the traction part 22 is connected to the push-pull part 13, and the distal end is connected to the basket part 3, so as to drive the basket part 3 to move in the axial direction.

[0084] It should be noted that the traction unit 2 can transmit not only axial tensile force, but also torque, so as to drive the basket unit 3 to rotate.

[0085] The sheath tube 15 has an accommodating cavity that extends along the axial direction. The accommodating cavity is used to accommodate the basket section 3 and the traction section 2. The sheath tube 15 is a working channel for transferring the basket section 3.

[0086] The distal end of the injection handle 16 is connected to the proximal end of the sheath 15, and the injection handle 16 has an injection cavity that communicates with the sheath 15 for injecting contrast agent.

[0087] The push-pull part 13 is connected to the traction part 2 in a transmission manner, and can transmit the pulling force and torsional force to the traction part 2. It drives the basket part 3 to reciprocate linear motion by pushing and pulling, and drives the basket part 3 to rotate by rotating.

[0088] The push-pull handle 14 is fixedly connected to the push-pull part 13. The operator drives the basket part 3 to extend and retract within the sheath tube 15 and rotate the basket part 3 by reciprocating and rotating the push-pull handle 14.

[0089] Specifically, such as Figure 1 The diagram shows the structure of the stone retrieval basket system. The basket section includes a connecting part 1, which is connected to the traction part 2 of the stone retrieval basket system to drive the basket section 3 of the stone retrieval basket to move.

[0090] Main support arm 4, which is the main body of basket part 3; one end of main support arm 4 is connected to connecting part 1;

[0091] The sub-support structure 5 is connected to the other end of the main support arm 4 and is used to connect the main support arm 4 to form the basket section 3. The sub-support structure 5 is provided with a fracture section 6 for realizing the breakage of the basket. The sub-support structure 5 has deformation. During the stretching process, the main support arm 4 drives the sub-support structure 5 to deform until the fracture section 6 on the sub-support structure 5 breaks and opens the basket section 3. As the deformation of the sub-support structure 5 gradually increases, it provides a stable and changing feedback force to the main support arm 4.

[0092] In Embodiment 1 of this utility model: During ERCP, when stones 7 of different sizes and shapes become embedded, pulling the push-pull handle 14 gradually tightens the basket head until it can no longer retract. The main support arm 4 and the stone are subjected to mutual force. During this process, the push-pull handle can cover the stone with relatively easy force. Because the sub-support structure 5 has deformation and elasticity, when the push-pull handle 14 is pulled again, the sub-support structure 5 will resist the push-pull handle 14 due to its elasticity, and the sub-support structure 5 will recover when it is released after being pulled. In the above process, the main support arm 4 causes the sub-support structure 5 to deform after being subjected to force. As the deformation of the sub-support structure 5 gradually increases, it provides a stable and changing feedback force to the main support arm 4. This feedback force also gradually increases synchronously with the increase of the deformation of the sub-support structure 5, so that the operator can perceive and judge the stone embedding situation through the above feedback force. Finally, after confirming the stone is impacted through feedback force, the operator cuts off the sheath 15 and replaces it with a metal spring tube 19, and uses a lithotripter to fix the push-pull handle 14. Gradually increasing the applied force, the main support arm 4 causes the sub-support structure 5 to deform until the fracture part 6 on the sub-support structure 5 breaks, separating the adjacent main support arms 4 and allowing the stone 7 to fall out of the basket part 3.

[0093] Example 2

[0094] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the stone-collecting basket system in an embodiment of this utility model is shown. Figure 2 This is a schematic diagram of the basket structure in an embodiment of the present utility model.

[0095] In a preferred embodiment, in this example, material is removed from the fracture portion 6 of the sub-support structure 5, thereby achieving fracture at the fracture point during tension. For example... Figure 2 As shown, the sub-support structure 5 is an elastic ring fixedly connected to the main support arm 4, and the fracture part 6 is an opening provided on the elastic ring. When the sub-support structure 5 is deformed under force, the fracture part 6 deforms and fractures when it reaches the deformation limit, allowing the stone 7 to fall out of the basket part 3. Multiple fracture parts 6 are evenly distributed on the sub-support structure 5 between adjacent main support arms 4. By providing multiple fracture parts 6, it is ensured that when the sub-support structure 5 is deformed under force, multiple fracture parts 6 are simultaneously subjected to tensile force and deform, thereby increasing the probability of fracture and preventing the stone from failing to fall out.

[0096] It is understood that the above embodiments do not specifically limit the number and arrangement of the fracture parts 6. In other embodiments, the number of fracture parts 6 may be one, which is provided on the sub-support structure 5.

[0097] According to the technical solution described in Example 1, the release force data of the net wire with a net opening width W of 20mm is as follows:

[0098]

[0099] In this embodiment Figure 1 The method of using the stone retrieval basket system shown includes the following steps:

[0100] S1, in the initial state, the basket part 3 is driven by the push-pull handle 14, which causes the basket part 3 to extend out of the sheath tube 15, and the main support arm 4 is stretched into its original fixed state under its own elastic force.

[0101] S2, continue to move the push-pull handle 14 to put the stone 7 into the basket part 3;

[0102] S3, after the stone 7 is embedded in the basket section 3, cut off the sheath tube 15 and replace it with a metal spring tube 19, and use the stone crushing device to fix the traction section 2.

[0103] S4, fix the metal spring tube 19, and pull the basket part 3 backward to generate a force toward the stone 7, thereby breaking the fracture part 6, separating the adjacent main support arms 4, and allowing the stone 7 to fall out of the basket part 3.

[0104] In this step, firstly as follows Figure 3 The diagram shows a three-dimensional structure of a stone embedded in a stone retrieval basket. When the basket 3 covers the stone 7 and becomes embedded, the push-pull handle 14 is driven to tighten the basket 3.

[0105] After that, as Figures 4 to 5 The diagram shows the changes in the fracture section. The traction force on the basket section 3 gradually increases from the axis of the stone 7 towards the proximal end of the push-pull handle 14. After the main support arm 4 drives the sub-support structure 5 to be stressed, it deforms, and the fracture section 6 formed by material removal in its area deforms.

[0106] Finally, as Figure 6 and Figure 7 The diagram shows the state where the fractured portion of the sub-support structure reaches its deformation limit and fractures, allowing the stone to escape from the basket section. The fractured portion 6 reaches its deformation limit and fractures, allowing the stone 7 to escape from the basket section 3.

[0107] S5: Withdraw the basket section 3 and the metal spring tube 19 together to the outside of the duodenal papilla.

[0108] In Embodiment 2 provided by this utility model: as Figures 4 to 5As shown, during ERCP, when stones 7 of different sizes and shapes become impacted, pulling the push-pull handle 14 gradually tightens the basket head until it can no longer retract. The main support arm 4 and the stone exert force on each other. During this process, the push-pull handle can cover the stone with relatively easy force. Because the sub-support structure 5 has deformation and elasticity, when the push-pull handle 14 is pulled again, the sub-support structure 5 will resist the push-pull handle 14 due to its elasticity, and there is also a slight recovery effect after pulling. In the above process, the main support arm 4 drives the sub-support structure 5 of the elastic ring structure to deform after being subjected to force. As the deformation of the sub-support structure 5 gradually increases, it provides a stable and changing feedback force to the main support arm 4. This feedback force also gradually increases synchronously with the increase of the deformation of the sub-support structure 5. The elastic ring and the opening on the elastic ring are gradually stretched, and the resistance of the elastic ring also gradually increases, so that the operator can perceive and judge the stone impaction through the above feedback force. Finally, after confirming the stone is impacted through feedback force, the operator cuts off the sheath 15 and replaces it with a metal spring tube 19, and uses a lithotripsy device to fix the push-pull handle 14. Gradually increasing the applied force, the main support arm 4 causes the sub-support structure 5 to deform until the opening on the elastic ring on the sub-support structure 5 breaks. The broken part 6 separates the adjacent main support arms 4, allowing the stone 7 to fall out of the basket part 3.

[0109] Example 3

[0110] See Figure 8 , Figure 8 A schematic diagram of the basket structure in an embodiment of this utility model is shown.

[0111] In a preferred embodiment, the deformation of the sub-support arm on the sub-support structure 5 is controlled, thereby increasing the stress on the sub-support arm and causing it to break. Figure 8 As shown, the aforementioned sub-support structure 5 consists of a first elastic sub-support arm 8. The main support arm 4 drives the first sub-support arm 8 to deform, changing the direction of force on the sub-support structure 5. This causes the fractured part 6 to experience increased force along the line connecting the distal ends of the adjacent main support arms 4, leading to the fracture of the fractured part 6. Through this structure, the elastic first sub-support arm 8 effectively ensures that when the sub-support structure 5 is subjected to tension, the feedback force increases linearly and gradually, allowing the operator to promptly feel the feedback force.

[0112] In the above preferred embodiments, such as Figure 11 The diagram shows the structural changes and force direction changes of the basket before and after being subjected to traction. When the basket 3 traps the stone 7, the changes in the component forces F1 and F2 of the first supporting arm 8 and the main supporting arm 4, as well as the angle α of the forces, conform to the Pythagorean theorem formula for resultant and component forces:

[0113]

[0114] During the process of the basket 3 encasing the stone 7, the release force F increases at a constant rate until the fracture part 6 breaks. F1 and F2 are the components of F. As the angle of force α increases, the component forces F1 and F2 increase, and the fracture part 6 breaks more easily. That is, when the release force F increases at a constant rate, the larger the angle of force α, the larger the component forces F1 and F2, and the greater the force transmitted to the fracture part 6, until the material strength limit of the supporting structure 5 is reached.

[0115] Furthermore, such as Figure 9 The diagram shows the structural deformation of the first support arm of the basket under stress. And, as shown... Figure 10 The diagram shows the state in which the stone detaches from the basket after the fractured portion of the first sub-support arm reaches its deformation limit and breaks. The aforementioned sub-support structure 5 is a cross-shaped structure composed of the elastic first sub-support arm 8, and the fractured portion 6 is located in the concave position of the cross-shaped structure.

[0116] The end of the main support arm 4 is connected to one end of each of the two first sub-support arms 8, and the other end of each of the two first sub-support arms 8 is connected to the adjacent main support arm 4.

[0117] It is understood that the above embodiments do not specifically limit the shape and structure of the elastic first sub-support arm 8 on the sub-support structure 5. In other embodiments, the above sub-support structure 5 may also be formed by the elastic first sub-support arm 8 into an X-shaped structure or other structures.

[0118] Understandably, the above embodiments do not specifically limit the location of the fracture part 6. In other embodiments, the fracture part 6 can be located at any position on the first sub-support arm 8.

[0119] In a preferred embodiment, the cross-section of the connection point between the first sub-support arm 8 and the main support arm 4 is circular. This circular connection joint effectively ensures the connection strength.

[0120] Understandably, the above embodiments do not specifically limit the cross-sectional shape of the connection position between the first sub-support arm 8 and the main support arm 4. In other embodiments, the cross-section of the connection position between the first sub-support arm 8 and the main support arm 4 can also be rectangular or irregular.

[0121] As a preferred implementation, such as Figure 8The diagram shows a schematic of the basket structure in an embodiment of the present invention. A transition hole 9, formed by adjacent first sub-support arms 8, is formed at the connection point between the sub-support structure 5 and the main support arm 4. This transition hole 9, used for the transitional connection between the sub-support structure 5 and the main support arm 4, can effectively guide the first sub-support arms 8 on the sub-support structure 5 to open and form a cross-shaped structure.

[0122] Understandably, the above embodiments do not specifically limit the shape of the transition hole 9. In other embodiments, the transition hole 9 may also be an elliptical hole, a square hole, or other shapes.

[0123] In a preferred embodiment, the maximum width dimension A of the first sub-support arm 8 is less than half the width dimension B of the main support arm 4; the maximum length dimension M of the sub-support structure 5 is less than half the maximum width dimension W of the basket part 3.

[0124] According to the technical solution described in Example 2, the release force data of the net wire with a net opening W of 20mm is as follows:

[0125]

[0126] In this embodiment Figure 8 The method of using the stone retrieval basket system shown includes the following steps:

[0127] S1, in the initial state, the basket part 3 is driven by the push-pull handle 14, which causes the basket part 3 to extend out of the sheath tube 15, and the main support arm 4 is stretched into its original fixed state under its own elastic force.

[0128] S2, continue to move the push-pull handle 14 to put the stone 7 into the basket part 3;

[0129] S3, after the stone 7 is embedded in the basket section 3, cut off the sheath tube 15 and replace it with a metal spring tube 19, and use the stone crushing device to fix the traction section 2.

[0130] S4, fix the metal spring tube 19, and pull the basket part 3 backward to generate a force toward the stone 7, thereby breaking the fracture part 6, separating the adjacent main support arms 4, and allowing the stone 7 to fall out of the basket part 3.

[0131] In this step, firstly as follows Figure 8 The diagram shows a three-dimensional structure of a stone embedded in a stone retrieval basket. When the basket 3 covers the stone 7 and becomes embedded, the push-pull handle 14 is driven to tighten the basket 3.

[0132] After that, as Figure 9The diagram shows the change in fracture section 6. The traction force on the basket section 3 gradually increases from the axis of the stone 7 towards the proximal end of the push-pull handle 14, causing the main support arm 4 to deform the first sub-support arm 8, and thus... Figure 11 As shown, the force direction of the sub-support structure 5 is changed, which increases the force on the fracture part 6 along the line connecting the far ends of the connection positions of the adjacent main support arms 4.

[0133] Finally, as Figure 10 As shown, the fractured part 6 on the first supporting arm 8 of the basket part 3 reaches the deformation limit and fractures, and the stone falls out of the basket part.

[0134] S5: Withdraw the basket section 3 and the metal spring tube 19 together to the outside of the duodenal papilla.

[0135] In Embodiment 3 provided by this utility model: as Figure 8 and Figure 9 As shown, during ERCP, when stones 7 of different sizes and shapes become impacted, the basket head gradually tightens until it can no longer retract by pulling and pushing the handle 14. The main support arm 4 and the stone are subjected to mutual force. During this process, the main support arm 4 causes the elastic first sub-support arm 8 on the sub-support structure 5 to deform under force. The release force F applied by the main support arm 4 acts on the two adjacent first sub-support arms 8, and the two first sub-support arms 8 are subjected to the components of the release force F, F1 and F2. Figure 11 As shown, during the deformation of the sub-support structure 5, the angle between the component forces F1 and F2 gradually increases, providing a stable and changing feedback force to the main support arm 4. This feedback force also gradually increases with the increase of the angle and the release force F, allowing the operator to perceive and judge the stone impaction through the feedback force. Finally, after the operator confirms the stone impaction through the feedback force, the sheath tube 15 is cut off and replaced with a metal spring tube 19, and the push-pull handle 14 is fixed using a stone crushing device. Gradually increasing the applied force, the main support arm 4 causes the sub-support structure 5 to deform until the fracture part 6 connecting the adjacent first sub-support arm 8 on the sub-support structure 5 breaks, separating the adjacent main support arms 4 and allowing the stone 7 to fall out of the basket part 3.

[0136] Example 4

[0137] See Figure 12 , Figure 12 A schematic diagram of the basket structure in an embodiment of this utility model is shown.

[0138] As a preferred implementation, such as Figure 15As shown, the sub-support structure 5 includes an elastic sub-support arm 10 and a fracture sub-support arm 11. The elastic sub-support arm 10 is an elastic element, and the fracture portion 6 is disposed on the fracture sub-support arm 11. The main support arm 4 drives the elastic sub-support arm 10 to deform, changing the force direction of the sub-support structure 5. The tensile force is concentrated on the fracture sub-support arm 11, increasing the force on the fracture sub-support arm 11 and causing the fracture portion 6 to fracture. In a specific embodiment, the elastic sub-support arm 10 is stretched under force to form an arc-shaped structure so that the fracture portion 6 on the fracture sub-support arm 11 is subjected to force.

[0139] Understandably, the above embodiments do not specifically limit the deformation state of the elastic sub-support arm 10 when it is stretched. In an optional embodiment, the elastic sub-support arm 10 is stretched to form a straight structure so that the fracture portion 6 on the fractured sub-support arm 11 is subjected to force.

[0140] In one specific embodiment, the general shape of the aforementioned sub-support structure 5 is rectangular.

[0141] Understandably, the above embodiments do not specifically limit the structural shape of the sub-support structure 5. In an optional embodiment, the sub-support structure 5 may also be circular, arc-shaped, wavy, or other shapes.

[0142] In one specific embodiment, the elastic support arm 10 has a curved structure. Normally, the elastic support arm 10 is in a contracted state, and its length in this state is the same as that of the fractured support arm 11. In the stretched state, the elastic support arm 10 is longer than the fractured support arm 11. During the process of pulling the stone before it becomes impacted, the elastic force of the elastic support arm 10 can resist the pulling force. At this time, the pulling force of the stone is shared by both the elastic support arm 10 and the fractured support arm 11. When the stone becomes impacted, as the push-pull handle 14 continues to be pulled, the pulling force is greater than the elastic force of the elastic support arm 10, which straightens the elastic support arm 10, causing it to be in a deformed and stretched state. In this stretched state, the pulling force that should have been shared by both the elastic support arm 10 and the fractured support arm 11 is concentrated on the fractured support arm 11, increasing the pulling force on it and causing the fractured portion 6 on the fractured support arm 11 to bear the concentrated force.

[0143] Understandably, the above embodiments do not specifically limit the structure of the elastic sub-support arm 10. In an optional embodiment, the elastic sub-support arm 10 may also be a polygonal structure.

[0144] In one specific embodiment, the cross-section of the elastic sub-support arm 10 and the fracture sub-support arm 11 at the connection position with the main support arm 4 is circular.

[0145] Understandably, the above embodiments do not specifically limit the cross-sectional shape of the connection position. In an optional embodiment, the cross-section of the connection position between the elastic sub-support arm 10 and the fracture sub-support arm 11 and the main support arm 4 can also be rectangular or irregular.

[0146] Alternatively, the cross-section at the connection point between the elastic sub-support arm 10 and the main support arm 4 can be set to a circle, as needed. Meanwhile, the cross-section at the connection point between the fractured sub-support arm 11 and the main support arm 4 can be set to a rectangle.

[0147] In one specific embodiment, the fracture portion 6 is positioned at the center of the fracture support arm 11.

[0148] In some more specific embodiments, such as Figure 13 and Figure 14 As shown, the maximum width dimension A of the elastic sub-support arm 10 and the fracture sub-support arm 11 is less than half the width dimension B of the main support arm 4. The maximum width dimension M of the sub-support structure 5 is less than the inner diameter N of the sheath of the stone retrieval basket system.

[0149] According to the technical solution described in Example 3, the release force data of the net wire with a net opening width W of 20mm is as follows:

[0150]

[0151] In this embodiment Figure 12 The method of using the stone retrieval basket system shown includes the following steps:

[0152] S1, in the initial state, the basket part 3 is driven by the push-pull handle 14, which causes the basket part 3 to extend out of the sheath tube 15, and the main support arm 4 is stretched into its original fixed state under its own elastic force.

[0153] S2, continue to move the push-pull handle 14 to put the stone 7 into the basket part 3;

[0154] S3, after the stone 7 is embedded in the basket section 3, cut off the sheath tube 15 and replace it with a metal spring tube 19, and use the stone crushing device to fix the traction section 2.

[0155] S4, fix the metal spring tube 19, and pull the basket part 3 backward to generate a force toward the stone 7, thereby breaking the fracture part 6, separating the adjacent main support arms 4, and allowing the stone 7 to fall out of the basket part 3.

[0156] In this step, firstly as follows Figure 12 The diagram shows a three-dimensional structure of a stone embedded in a stone retrieval basket. When the basket 3 covers the stone 7 and becomes embedded, the push-pull handle 14 is driven to tighten the basket 3.

[0157] After that, as Figures 12 to 13 The diagram shows the changes in the fractured section. The traction force on the basket section 3 gradually increases from the axis of the stone 7 towards the proximal end of the push-pull handle 14, as shown... Figure 15 As shown, the main support arm 4 causes the elastic sub-support arm 10 to deform, changing the force direction of the sub-support structure 5, and the tensile force is concentrated on the broken sub-support arm 11, which increases the force on the broken sub-support arm 11.

[0158] Finally, as Figure 14 As shown, the fractured part 6 on the fractured support arm 11 reaches the deformation limit and fractures, and the stone 7 falls out of the basket part 3.

[0159] S5: Withdraw the basket section 3 and the metal spring tube 19 together to the outside of the duodenal papilla.

[0160] In Embodiment 4 of this utility model: During the ERCP process, when stones 7 of different sizes and shapes become embedded, the basket head gradually tightens until it can no longer retract by pulling the push-pull handle 14. The main support arm 4 and the stone are subjected to force. During this process, the push-pull handle can cover the stone with relatively easy force. Since the sub-support structure 5 has deformation and elasticity, when the push-pull handle 14 is pulled again, the sub-support structure 5 will resist the push-pull handle 14 due to its elasticity, and there is also a slight recovery effect after pulling. In the above process, the main support arm 4 drives the elastic sub-support arm 10 on the sub-support structure 5 to deform after being subjected to force. The length of the elastic sub-support arm 10 gradually increases under the stretching action of the main support arm 4, from the elastic sub-support arm 10 and the broken sub-support arm 11 having the same length, to the elastic sub-support arm 10 gradually becoming longer than the broken sub-support arm 11. This allows the tensile force, jointly borne by the elastic sub-support arm 10 and the fractured sub-support arm 11, to be concentrated on the fractured sub-support arm 11 during the tensile state, resulting in a gradual increase in the tensile force on the fractured sub-support arm 11. As the deformation of the elastic sub-support arm 10 gradually increases, it provides a stable and changing feedback force to the main support arm 4. This feedback force also gradually increases synchronously with the increase in the deformation of the sub-support structure 5, allowing the operator to perceive and judge the stone impaction through the feedback force. Finally, after the operator confirms the stone impaction through the feedback force, they cut off the sheath tube 15 and replace it with a metal spring tube 19, and use a stone crushing device to fix the push-pull handle 14. Gradually increasing the applied force, the main support arm 4 causes the sub-support structure 5 to deform until the fractured part 6 on the fractured sub-support arm 11 breaks, separating the adjacent main support arms 4 and allowing the stone 7 to fall out of the basket part 3.

[0161] Example 5

[0162] See Figure 16 and Figure 17 , Figure 16A schematic diagram of the overall structure of the stone-collecting basket system in an embodiment of this utility model is shown. Figure 17 A schematic diagram of the through-wire structure of the basket section in an embodiment of this utility model is shown.

[0163] In a preferred embodiment, such as Figure 17 As shown, the supporting structure 5 is a basket head, with an opening on the basket head for the basket control component 17 to pass through and connect to. The basket control component 17 is a tubular structure, and the guide wire 18 passes through the basket control component 17, is coaxially arranged with the basket control component 17, and extends from the head of the basket to form a through guide wire. In this utility model, the basket control component 17 is a tubular structure, and the aforementioned basket portion 3 is an opening formed at the head end of the basket portion 3 after laser cutting. The guide wire 18 is disposed inside the basket control component 17, is coaxially arranged with the basket control component 17, and can extend directly from the head of the basket. In this embodiment, the coaxial arrangement of the guide wire 18 and the basket control component 17 can effectively achieve the following: the coaxial arrangement of the basket control component 17 and the guide wire improves the centering performance of the guide wire, thereby improving the guidance of the guide wire and increasing the success rate of cannulation; at the same time, since the guide wire is inside the basket control component 17, the insertion of the guide wire is also improved.

[0164] Furthermore, the push-pull part 13 and the traction part 2 are connected by laser welding.

[0165] Understandably, the push-pull part 13 and the traction part 2 are not specifically limited in the above embodiments. In other embodiments, the push-pull part 13 and the traction part 2 can also be connected by means of welding or pressing. Among them, the welding uses a fusible solder, such as brazing wire or nickel-based solder.

[0166] In one specific embodiment, the basket part 3 is processed by an integral thermoforming process, thereby improving the processing accuracy of the basket part 3.

[0167] In one specific embodiment, the fracture portion 6 is formed through a material embrittlement treatment. Specifically, the material embrittlement treatment can be any one or more of the following: passivation, pickling, heat treatment, rolling cold processing, and drawing cold processing. The above-mentioned material embrittlement process can effectively accelerate the fracture of the fracture portion 6.

[0168] In an optional embodiment, the fracture portion 6 is a fracture-prone structure, which is any one or more of a V-shaped opening and a taper. The fracture portion 6 can be effectively accelerated to fracture by the above-mentioned fracture-prone structure.

[0169] In summary, this utility model provides a basket section, a stone retrieval basket system, and a method for using the same, which can avoid the problem of stones remaining trapped even after the basket section breaks. Furthermore, it provides stable feedback force to the operator during trapping, allowing the operator to determine whether the trapping is due to stone size or other reasons causing the basket breakage.

[0170] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A basket portion of a stone extraction basket, characterized by, include: The connecting part (1) is connected to the traction part (2) of the stone retrieval basket system to drive the basket part (3) of the stone retrieval basket to move. Main support arm (4), which is the main body of the basket part (3); one end of the main support arm (4) is connected to the connecting part (1); The sub-support structure (5) is connected to the other end of the main support arm (4) and is used to connect the main support arm (4) to form the basket part (3); the sub-support structure (5) is provided with a fracture part (6) for realizing the breakage of the basket; and the sub-support structure (5) has deformation. During the stretching process, the main support arm (4) drives the sub-support structure (5) to deform until the fracture part (6) on the sub-support structure (5) breaks and opens the basket part (3). As the deformation of the sub-support structure (5) gradually increases, it provides a stable and changing feedback force to the main support arm (4).

2. The stone basket of the stone basket basket portion according to claim 1, characterized in that, The sub-support structure (5) is an elastic ring fixedly connected to the main support arm (4), and the fracture part (6) is an opening provided on the elastic ring; When the sub-support structure (5) is subjected to force and deforms, the fracture part (6) deforms and fractures when it reaches the deformation limit, and the stone (7) is released from the basket part (3).

3. The stone basket of claim 2, wherein, The fractured portion (6) is multiple and is located on the sub-support structure (5) between adjacent main support arms (4).

4. The stone basket of claim 1, wherein, The sub-support structure (5) consists of a first sub-support arm (8) with elasticity. The main support arm (4) drives the first sub-support arm (8) to deform, changing the force direction of the sub-support structure (5). This causes the fractured part (6) to experience increased force along the line connecting the far ends of the adjacent main support arms (4), causing the fractured part (6) to break.

5. The stone basket of claim 4, wherein, The sub-support structure (5) is a cross-shaped structure composed of elastic first sub-support arms (8), and the fracture part (6) is located at any position on the first sub-support arm (8); the end of the main support arm (4) is connected to one end of the two first sub-support arms (8), and the other end of the two first sub-support arms (8) is connected to the adjacent main support arm (4).

6. The basket portion of the stone-collecting basket according to claim 5, characterized in that, The concave position of the cross-shaped structure is the fracture portion (6); and / or, The cross-section of the connection point between the first sub-support arm (8) and the main support arm (4) is circular, rectangular, or irregular; and / or, The sub-support structure (5) and the main support arm (4) are connected by a transition hole (9) formed by adjacent first sub-support arms (8); the transition hole (9) includes: a round hole, an elliptical hole, or a square hole.

7. The basket portion of the stone-collecting basket according to claim 5, characterized in that, The maximum width dimension A of the first sub-support arm (8) is less than half the width dimension B of the main support arm (4); and / or, The maximum length dimension M of the sub-support structure (5) is less than half the maximum width dimension W of the basket part (3).

8. The stone basket of claim 5, wherein, When the basket (3) covers the stone (7), the changes in the component forces F1, F2 and the angle α of the first sub-support arm (8) and the main support arm (4) conform to the Pythagorean theorem formula of resultant force and component forces: During the process of the basket (3) encasing the stone (7), the release force F increases at a constant rate until the fracture part (6) breaks. F1 and F2 are the components of F. As the angle of force α increases, the component forces F1 and F2 increase, and the fracture part (6) breaks more easily. That is, when the release force F increases at a constant rate, the angle of force α increases, the component forces F1 and F2 increase, and the force transmitted to the fracture part (6) increases until the material strength limit of the sub-support structure (5) is reached.

9. The basket portion of the stone-collecting basket according to claim 1, characterized in that, The sub-support structure (5) includes: an elastic sub-support arm (10) and a fracture sub-support arm (11). The elastic sub-support arm (10) is an elastic element, and the fracture part (6) is disposed on the fracture sub-support arm (11). The main support arm (4) drives the elastic sub-support arm (10) to deform, changing the force direction of the sub-support structure (5). The tensile force is concentrated on the fracture sub-support arm (11), causing the fracture sub-support arm (11) to be subjected to increased force, resulting in the fracture part (6) breaking.

10. The stone basket of claim 9, wherein, The elastic sub-support arm (10) is stretched under force to form an arc-shaped or straight structure, so that the fractured portion (6) on the fractured sub-support arm (11) is subjected to force; and / or, The elastic sub-support arm (10) is a curved or broken line structure; and / or, The cross-section of the elastic sub-support arm (10) and / or the fracture sub-support arm (11) at the connection position with the main support arm (4) is circular, rectangular, or irregular; and / or, The fracture portion (6) is located at the center of the fracture support arm (11); and / or, The maximum width dimension A of the elastic sub-support arm (10) and the fracture sub-support arm (11) is less than half the width dimension B of the main support arm (4); and / or, The maximum width dimension M of the sub-support structure (5) is smaller than the inner diameter N of the sheath of the stone retrieval basket system.

11. The basket portion of a lithotomy basket according to any one of claims 1 to 10, wherein, The basket section (3) is manufactured using an integrated thermoforming process; and / or, The sub-support structure (5) can be any one of the following shapes: circular, arc-shaped, wave-shaped, or rectangular; And / or, The fracture portion (6) is formed through a material embrittlement treatment, which includes any one or more of the following: passivation, pickling, heat treatment, rolling cold working, and drawing cold working; and / or, The fracture portion (6) is a fracture-prone structure, which includes one or more of the following: a V-shaped opening, a taper; and / or, The connecting part (1) includes any one of the following structures: vertical circular hole structure, centripetal circular hole structure, rectangular hole structure, and straight slot hole structure.

12. A stone retrieval basket system, comprising: include: The basket portion of the stone-collecting basket as described in any one of claims 1 to 11; as well as, Stone retrieval basket handle, the stone retrieval basket handle comprising: The traction part (2) is connected to the distal end of the connecting part (1) away from the patient; Push-pull part (13), the push-pull part (13) is connected to the traction part (2) in a transmission. The far end of the push-pull part (13) away from the operator is connected to the traction part (2). The near end of the push-pull part (13) close to the operator is connected to the push-pull handle (14). The push-pull handle (14) is a handheld part that drives the basket part (3) to move. Sheath (15), the inner cavity of which serves as the working channel for the basket section (3); Injection handle (16), on which a liquid injection port is provided.

13. The stone basket system of claim 12, wherein, The sub-support structure (5) is a basket head, and the basket head is provided with an opening for the basket control component (17) to pass through and connect to it; and the basket control component (17) is a tube structure, with a guide wire (18) passing through the basket control component (17), and coaxially arranged with the basket control component (17), extending out from the head of the basket to form a through guide wire.

14. The stone-retrieving basket system according to claim 13, characterized in that, The push-pull part (13) and the traction part (2) are connected by any one of laser welding, feeding welding, or pressing; wherein the feeding welding uses a fusible solder, including: brazing wire, nickel-based welding wire; and / or, The basket head is an opening formed at the head end of the basket part (3) by laser cutting.

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