Mesh basket capable of actively adjusting bending

Abstract

According to the scheme, the net basket comprises a handle assembly which is provided with a rotary knob, and the rotary knob is used for driving a handle bending adjusting valve to rotate; one end of the handle bending valve is in driving connection with the knob, and the other end is connected with the tail end of the adjustable bending wire; the composite pipe sequentially comprises an inner layer, a middle layer and an outer layer from inside to outside, the middle layer has elasticity, and the composite pipe is divided into a main body section and a bendable section; the adjustable bending wire is arranged between the outer layer and the middle layer of the composite pipe and can move back and forth in the length direction of the composite pipe, and the head end of the adjustable bending wire is fixed to the head end of the middle layer of the composite pipe, so that the handle bending adjusting valve is driven by rotating the handle assembly to control the bending angle of the mesh basket head; and the net basket head is arranged at the head end of the composite pipe. The net basket head can be actively bent, so that the operation difficulty of a doctor is reduced, and the operation time is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an actively bendable mesh basket. Background Art

[0002] With the development of medical technology, endoscopic minimally invasive surgery has been widely used in the field of stone treatment, among which the stone removal basket is a key tool used to locate and remove stones in the patient's body through endoscope assistance. The stone removal basket in the prior art usually has a structural design that matches the endoscope, and the basket can be directly controlled to open and close through the operating handle to clamp and release the stone. However, in actual surgical procedures, especially when dealing with complex cases, the existing stone removal basket technology has certain limitations and shortcomings.

[0003] Specifically, most existing stone removal baskets do not have the function of active bending adjustment, and their bending shape completely depends on the tortuosity of the matching endoscope in the body channel to adapt to different anatomical positions. When the stones are located in a relatively scattered, hidden or difficult-to-reach space, such as a complex curved surface or narrow part inside the human body, the operating flexibility of the endoscope itself may not be enough to accurately guide the stone removal basket to the location of the stone, which not only makes the operation more difficult and prolongs the operation time, but also may increase the potential risk of damage to the patient's tissues due to repeated attempts to adjust the angle of the endoscope, affecting the success rate of the operation and postoperative recovery.

[0004] In view of this, it is urgent to develop a new stone removal basket that can overcome the limitations of existing technologies and enable it to have active bending capabilities, so as to more flexibly and accurately adapt to the stone removal needs in various complex anatomical environments, effectively reduce surgical complications, and improve surgical efficiency and safety. The utility model is aimed at this technical problem and proposes a basket design that can be actively bent, aiming to solve the problem that existing stone removal baskets are difficult to remove stones efficiently and safely under specific conditions. Utility Model Content

[0005] The purpose of the present application is to provide an actively bendable mesh basket in order to address the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above application purpose, the present application adopts the following technical solution: an actively adjustable bending basket comprises:

[0007] The handle assembly is provided with a knob, and the knob is used to drive the handle bending valve to rotate;

[0008] The handle bending valve has one end connected to the knob drive and the other end connected to the end of the adjustable bending wire;

[0009] The composite tube comprises an inner layer, a middle layer and an outer layer from the inside to the outside, the middle layer is elastic, and the composite tube is divided into a main body section and a bendable section;

[0010] The adjustable bending wire is arranged between the outer layer and the middle layer of the composite pipe and can move back and forth along the length direction of the composite pipe. The head end of the adjustable bending wire is fixed to the head end of the middle layer of the composite pipe so as to drive the handle bending valve to control the bending angle of the basket head by rotating the handle assembly.

[0011] The basket head is arranged at the head end of the composite pipe.

[0012] Working principle and beneficial effects: 1. Compared with the prior art, when the product of the present application is used, when the operator rotates the knob, the knob will be linked to the handle bending valve. The handle bending valve is connected to the end of the adjustable bending wire, so when the knob is rotated, the adjustable bending wire will be driven to move inside the composite tube. Since the adjustable bending wire is designed to slide inside the composite tube, and its head is fixed to the middle layer head end of the composite tube, when the adjustable bending wire slides inside the composite tube, its relative position will change, thereby realizing the bending of the basket head end. Specifically, when the knob is rotated clockwise or counterclockwise, the handle bending valve will allow the adjustable bending wire to expand or deflect in a preset manner in the turnable section (i.e., the composite tube part with a certain hardness and flexibility), and this expansion or deflection will cause the bending direction and angle of the entire basket head to change. Through precise design and control, the basket head can be bent in both directions, i.e., to the left or to the right, and the bending angle can be precisely adjusted in the range of 0 to 300 degrees to adapt to different clinical needs and surgical scenarios. This greatly reduces the difficulty of operation for doctors, shortens the operation time, and reduces damage to the human body during endoscope insertion.

[0013] 2. The actively bendable basket of the present application realizes precise conversion of the handle knob operation through a sophisticated mechanical linkage design, so that the basket head can actively adjust the bending angle within a larger range, greatly improving the success rate and surgical efficiency of stone grasping in complex anatomical environments, and reducing the risk of iatrogenic damage.

[0014] Furthermore, the adjustable bending wire is provided with a PTFE coating or wrapped with a smooth material. This has the following significant effects:

[0015] Low coefficient of friction: The PTFE coating has an extremely low coefficient of friction, which means that the adjustable bending wire encounters less resistance when sliding inside the composite tube and can move more smoothly, allowing the doctor to more precisely control the bending angle and shape of the basket head when turning the handle.

[0016] Biocompatibility: As a medical-grade material, PTFE generally has good biocompatibility and will not cause adverse reactions or irritation to human tissues. It is suitable for implantable or interventional medical devices.

[0017] Prevent adhesion: Due to its excellent non-stick properties, PTFE can effectively prevent tissue adhesion or unnecessary adhesion to other instruments during surgery, which is conducive to smoother operation and removal of instruments in the body.

[0018] Smooth surface: Smooth material wrapping also helps to reduce resistance and improve operation fluency. It can also reduce trauma to surrounding tissues during surgery and enhance the safety and comfort of surgery.

[0019] Furthermore, the inner layer and the outer layer of the composite pipe are both made of polymer materials.

[0020] Further, the middle layer of the composite tube is made of spring or braided wire metal material.

[0021] Furthermore, the length of the bendable section of the composite pipe is 10-100 mm, and the hardness of the outer layer of the bendable section is 10-100A.

[0022] Furthermore, the number of the adjustable bending wires is one or two. When the number of the adjustable bending wires is two, the two adjustable bending wires are symmetrically arranged.

[0023] Furthermore, the basket head has two wires, three wires or four wires.

[0024] Furthermore, the polymer material of the outer layer includes one of PI, TPU, PEBAX, and PA.

[0025] Furthermore, the adjustable bending wire is made of stainless steel or nickel-titanium alloy wire.

[0026] Furthermore, a protective sleeve is provided outside the main body section of the composite pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of this application;

[0028] Figure 2 is a cross-sectional view of the composite tube;

[0029] Figure 3 These are various styles of basket head.

[0030] In the figure, 1. handle assembly; 2. handle bending valve; 3. protective cover; 4. composite pipe; 5. basket head; 41. outer layer; 42. middle layer; 43. inner layer; 44. adjustable bending wire. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0032] Those skilled in the art should understand that, in the disclosure of the present application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0033] like Figure 1-3 As shown, the actively adjustable bending basket comprises:

[0034] The handle assembly 1 is provided with a knob, and the knob is used to drive the handle bending valve 2 to rotate;

[0035] In this embodiment, the handle assembly 1 is mainly used as a gripping component, and the knob installed at the end thereof is extended internally to connect the handle bending regulating valve 2.

[0036] A handle bending valve 2, one end of which is connected to the knob drive, and the other end is connected to the end of the adjustable bending wire 44;

[0037] The composite tube 4 comprises, from the inside to the outside, an inner layer 43, a middle layer 42 and an outer layer 41, wherein the middle layer 42 is elastic, and the composite tube 4 is divided into a main section and a bendable section; wherein the bendable section has a length of 10-100 mm, and the hardness of the outer layer 41 of the bendable section is 10-100A.

[0038] In this embodiment, the composite tube 4 is composed of an inner layer 43, an intermediate layer 42, and an outer layer 41. The inner layer 43 and the outer layer 41 are made of polymer materials. The intermediate layer 42 is made of a spring or braided wire metal material.

[0039] Preferably, the material of the outer layer 41 is PI / TPU / PEBAX / PA polymer material, and the material of the inner layer 43 can also be these. The polymer material of the outer layer 41 is selected from PI (polyimide), TPU (thermoplastic polyurethane), PEBAX (polyether block amide copolymer), PA (polyamide, nylon), each of which has its own special performance characteristics. When applied to the outer layer 41 of the composite pipe 4 that can actively adjust the bending basket, it can bring the following effects:

[0040] PI (polyimide):

[0041] High temperature stability: PI has a very high heat resistance level and can maintain good mechanical properties even at extremely high temperatures, making it suitable for use in high temperature sterilization or high temperature surgical environments.

[0042] Chemical stability: It has strong resistance to chemical corrosion, is insoluble in most organic solvents, and can maintain good performance even after long-term exposure to harsh environments.

[0043] High mechanical strength: PI has excellent tensile strength and wear resistance, which is very important for withstanding bending stress and preventing wear.

[0044] TPU (thermoplastic polyurethane):

[0045] Elasticity and toughness: TPU has both the high elasticity of rubber and the high strength of plastic, so that the composite tube 4 can quickly return to its original shape after bending and deformation, which is suitable for occasions that require frequent bending adjustments.

[0046] Wear resistance and weather resistance: TPU has good wear resistance and aging resistance, and can maintain good performance after repeated use.

[0047] Biocompatibility: As a medical material, TPU has good biocompatibility and reduces adverse reactions to human tissues.

[0048] PEBAX (polyether block amide copolymer):

[0049] Thermoplasticity and shape memory: PEBAX has excellent thermoplasticity and shape memory effect. It can be shaped arbitrarily after heating and maintain its shape after cooling. It is very suitable for making adjustable bending structures.

[0050] Softness and compliance: It is soft and has good compliance, which can reduce the pressure and damage of the device on the patient's body tissue.

[0051] Translucency: Some PEBAX materials have good ultrasound or X-ray transparency, which facilitates clear display in image-guided surgery.

[0052] PA (polyamide, nylon):

[0053] Wear resistance and impact resistance: PA series materials have good wear resistance and impact resistance, so that the composite pipe 4 can withstand certain external pressure and impact.

[0054] Hygroscopicity and dimensional stability: Although PA has strong hygroscopicity, its dimensional stability can be improved through modification, and it can still maintain good rigidity and straightness in a humid environment.

[0055] Good processability: PA material is easy to be injection molded and extruded, and can be customized in different thicknesses and shapes as needed.

[0056] Preferably, a protective sleeve 3 is provided outside the main body section of the composite pipe 4, so as to better protect the composite pipe 4 and prevent the main body section from bending.

[0057] The adjustable bending wire 44 is disposed between the outer layer 41 and the middle layer 42 of the composite pipe 4 and can move back and forth along the length direction of the composite pipe 4. The head end of the adjustable bending wire 44 is fixed to the head end of the middle layer 42 of the composite pipe 4, so as to drive the handle bending valve 2 to control the bending angle of the basket head 5 by rotating the handle assembly 1;

[0058] In this embodiment, the surface of the adjustable bending wire 44 is coated with PTFE coating or wrapped with smooth material to ensure that the adjustable bending wire 44 can slide freely in the braided tube (referring to the composite tube 4). The adjustable bending wire 44 is composited on the braided tube, specifically, the head end of the adjustable bending wire 44 is fixed to the head end of the basket braided tube (the middle layer 42 of the composite tube 4), and the end of the adjustable bending wire 44 is connected to the handle assembly 1 to the handle bending valve 2, and the bending angle of the basket head 5 is controlled by rotating the handle bending valve 2 clockwise / counterclockwise.

[0059] The adjustable bending wire 44 is provided with a PTFE coating or wrapped with a smooth material. This has the following significant effects:

[0060] Low friction coefficient: The PTFE coating has an extremely low friction coefficient, which means that the adjustable bending wire 44 encounters less resistance when sliding inside the composite tube 4 and can move more smoothly, so that the doctor can more accurately control the bending angle and shape of the basket head 5 when turning the handle.

[0061] Biocompatibility: As a medical-grade material, PTFE generally has good biocompatibility and will not cause adverse reactions or irritation to human tissues. It is suitable for implantable or interventional medical devices.

[0062] Prevent adhesion: Due to its excellent non-stick properties, PTFE can effectively prevent tissue adhesion or unnecessary adhesion to other instruments during surgery, which is conducive to smoother operation and removal of instruments in the body.

[0063] Smooth surface: Smooth material wrapping also helps to reduce resistance and improve operation fluency. It can also reduce trauma to surrounding tissues during surgery and enhance the safety and comfort of surgery.

[0064] Preferably, the number of the adjustable bending wires 44 is one or two. When there are two adjustable bending wires 44, the two adjustable bending wires 44 are symmetrically arranged.

[0065] Preferably, the adjustable bending wire 44 is made of stainless steel or nickel-titanium alloy wire.

[0066] The basket head 5 is arranged at the head end of the composite pipe 4 .

[0067] In this embodiment, if Figure 3 As shown, the basket head 5 has two wires, three wires or four wires, which can be specifically divided into:

[0068] A. Two-wire headless oval; B. Three-wire headed spiral; C. Three-wire headless spiral; D. Four-wire headless spiral; E. Four-wire headed spiral; F. Four-wire headless oval; G. Four-wire headed oval.

[0069] The parts not described in detail in this application are prior art, so this application does not describe them in detail.

[0070] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0071] Although the terms such as handle assembly 1, handle bending valve 2, protective cover 3, composite tube 4, basket head 5, outer layer 41, middle layer 42, inner layer 43, and adjustable bending wire 44 are frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of this application; interpreting them as any additional restrictions is contrary to the spirit of this application.

[0072] The present application is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of this application. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present application.

Claims

1. An actively bendable basket, characterized in that: include: The handle assembly is provided with a knob, and the knob is used to drive the handle bending valve to rotate; A handle bending valve, one end of which is connected to the knob driving, and the other end of which is connected to the end of the adjustable bending wire; The composite tube comprises an inner layer, a middle layer and an outer layer from the inside to the outside, wherein the middle layer is elastic, and the composite tube is divided into a main body section and a bendable section; An adjustable bending wire is arranged between the outer layer and the middle layer of the composite pipe and can move back and forth along the length direction of the composite pipe, and the head end of the adjustable bending wire is fixed to the head end of the middle layer of the composite pipe, so as to drive the handle bending valve to control the bending angle of the basket head by rotating the handle assembly; The basket head is arranged at the head end of the composite pipe.

2. The actively bendable basket according to claim 1, characterized in that: The adjustable bending wire is provided with a PTFE coating or wrapped with a smooth material.

3. The actively bendable basket according to claim 1, characterized in that: The inner layer and the outer layer of the composite pipe are both made of polymer materials.

4. The actively bendable basket according to claim 1, characterized in that: The middle layer of the composite tube is made of spring or braided wire metal material.

5. The actively bendable basket according to claim 1, characterized in that: The length of the bendable section of the composite tube is 10-100 mm, and the hardness of the outer layer of the bendable section is 10-100A.

6. The actively bendable basket according to claim 1, characterized in that: The number of the adjustable bending wires is one or two. When there are two adjustable bending wires, the two adjustable bending wires are symmetrically arranged.

7. The actively bendable basket according to claim 1, characterized in that: The basket head has two wires, three wires or four wires.

8. The actively bendable basket according to claim 3, characterized in that: The polymer material of the outer layer includes one of PI, TPU, PEBAX and PA.

9. An actively bendable basket according to any one of claims 1 to 7, characterized in that: The adjustable bending wire is made of stainless steel or nickel-titanium alloy wire.

10. An actively bendable basket according to any one of claims 1 to 7, characterized in that: A protective sleeve is arranged outside the main body section of the composite pipe.

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