Foreign matter protection snare

Abstract

The utility model provides a foreign matter protection snare which comprises a core rod, a sliding block, an outer pipe and a snare assembly, the core rod is sleeved with the sliding block in a sliding mode, and the outer pipe is connected with the core rod; the snare assembly comprises a snare ring, a traction wire and a transparent silica gel pocket body, the unfolded snare ring is of an elliptic structure, the free end of the snare ring forms a sharp end, and foreign matter can be caught more easily; after being unfolded, the silica gel pocket body is of a semi-ellipsoid structure and is matched with the snare ring in shape, a large wrapping area is achieved, foreign matter can be better wrapped, a doctor can visually and clearly observe the position and the state of the foreign matter, and operation efficiency and safety are improved. As the silica gel pocket body has the characteristics of softness and elasticity, the sharp end of the foreign matter can be relieved, and the foreign matter is prevented from scratching the alimentary canal wall. A plurality of drainage holes are formed in the middle of the transparent silica gel pocket, so that liquid carried by foreign matters can be discharged conveniently, and the surgical definition is further improved. The device is particularly suitable for treating sharp foreign matters in the digestive tract.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a foreign object protection snare. Background Technology

[0002] The snare is one of the commonly used accessories in endoscopic treatment of digestive tract diseases. However, most snare cores currently used are of a ring structure. When handling foreign bodies in the digestive tract, especially sharp foreign bodies, the lack of sufficient protection can easily lead to the sharp end of the foreign body scratching or damaging the digestive tract wall, increasing patient suffering and affecting the safety of the operation.

[0003] Furthermore, application number CN202120098459.5 discloses a device for removing sharp foreign objects from the digestive tract. Although protective bags are placed inside and outside the mesh bag to reduce damage to the digestive tract during the removal process, the following technical problems still exist:

[0004] 1. The inner and outer protective bags are connected to the mesh bag by sewing, which makes the overall structure complex and cumbersome, increasing the difficulty and cost of manufacturing. It may also cause the protective bag to fall off or break during use due to the weak sewing points, affecting the protective effect and posing a safety hazard.

[0005] 2. The opening of the net is round. When handling sharp foreign objects, the round opening cannot provide enough containment, causing the foreign object to be unable to be stably wrapped by the net during the removal process.

[0006] 3. The design of the mesh bag and opaque protective bag restricts the doctor's field of vision, making it impossible for the doctor to directly observe the position and condition of the foreign object during the operation, resulting in low surgical efficiency.

[0007] In view of the above, this utility model is hereby proposed. Utility Model Content

[0008] The purpose of this utility model is to provide a foreign body protection snare to address the design flaws of existing snares, such as complex and cumbersome snare components that increase manufacturing difficulty and cost, poor connection stability, and the risk of detachment during surgery, posing safety hazards. The preferred technical solutions provided by this utility model and their numerous technical effects are detailed below.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] This utility model provides a foreign object protection snare, comprising a core rod, a slider, an outer tube, and a snare assembly. The slider is slidably fitted onto the core rod, and the outer tube is connected to the core rod. The snare assembly includes a snare ring, a traction wire, and a transparent silicone pouch. The unfolded snare ring has an elliptical structure with its free end forming a pointed tip. The unfolded silicone pouch has a semi-ellipsoidal structure, adapted to the shape of the snare ring, and has several drainage holes in the middle. One end of the traction wire is connected to the fixed end of the snare ring, and the other end passes through the outer tube and is connected to the slider.

[0011] Preferably, the open end of the silicone pouch covers the ring and is folded over to connect the silicone pouch body.

[0012] Preferably, the drainage holes are arranged in a matrix on the silicone pouch.

[0013] Preferably, the outer tube includes a first straight tube, a tapered tube, and a second straight tube connected in sequence. The core rod is sleeved on the second straight tube. The first straight tube is located close to the collar. The inner diameter of the first straight tube is larger than the inner diameter of the second straight tube. The inner diameter of the tapered tube gradually decreases towards the second straight tube.

[0014] Preferably, the core rod is a cuboid structure and has a sliding groove, the sliding groove is connected to the second straight tube, and the slider is slidably connected to the sliding groove.

[0015] Preferably, a first gripping ring is provided at the end of the core rod away from the loop ring, and second gripping rings are provided at both ends of the slider.

[0016] Preferably, the outer wall surface of the core rod is provided with scale lines.

[0017] Preferably, it further includes a gripping member, which is rotatably sleeved on the core rod, and friction protrusions are provided on the outer wall surface of the gripping member, which are arranged circumferentially along the gripping member.

[0018] The preferred technical solution of this utility model can also produce at least the following technical effects:

[0019] This invention effectively avoids the design flaws of existing snare devices, such as complex and cumbersome structures that increase manufacturing difficulty and cost, poor connection stability, and the risk of detachment during surgery, posing safety hazards. This invention provides a foreign body protection snare device, including a core rod, a slider, an outer tube, and a snare assembly. The slider is slidably fitted onto the core rod, and the outer tube is connected to the core rod. The snare assembly includes a snare ring, a traction wire, and a transparent silicone pouch. The unfolded snare ring has an elliptical structure with a pointed free end. The unfolded silicone pouch has a semi-ellipsoidal structure, adapted to the shape of the snare ring, and has several drainage holes in the center. One end of the traction wire is connected to the fixed end of the snare ring, and the other end passes through the outer tube and connects to the slider. This invention simplifies the design of the snare assembly, and through the combination of the elliptical snare ring and the semi-ellipsoidal silicone pouch, it can better adapt to foreign bodies of different shapes. Specifically, the snare ring, when unfolded, has an elliptical structure with a pointed tip at its free end, allowing it to more easily capture foreign objects. The transparent silicone apron, when unfolded, has a semi-ellipsoidal structure with a large coverage area, providing excellent support and encapsulation force when encapsulating foreign objects, thus better encapsulating them. It also allows doctors to clearly and directly observe the location and condition of the foreign object, improving surgical efficiency and safety, while reducing manufacturing difficulty and cost. Simultaneously, the softness and elasticity of the silicone apron softens the sharp end of the foreign object, preventing scratches to the digestive tract wall. Furthermore, the drainage holes on the silicone apron facilitate the drainage of any fluid carried by the foreign object, further improving surgical clarity. This invention is particularly suitable for handling sharp foreign objects in the digestive tract, effectively protecting the digestive tract wall from damage. It can also be applied to other types of foreign body removal surgeries. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of a foreign object protection snare provided by this utility model;

[0022] Figure 2 This is a schematic diagram of the snare assembly of a foreign object protection snare provided by this utility model;

[0023] Figure 3 This is a cross-sectional view of the grip and core rod of a foreign object protection snare provided by this utility model.

[0024] In the picture:

[0025] 1. Core rod; 11. Slide groove; 12. First gripping ring; 13. Connecting post; 14. Scale line;

[0026] 2. Slider; 21. Second gripping ring;

[0027] 3. Outer tube; 31. First straight tube body; 32. Retracting tube; 33. Second straight tube body;

[0028] 4. Trap / Loop;

[0029] 5. Traction wire;

[0030] 6. Silicone pocket; 61. Drainage hole;

[0031] 7. Grip element; 71. Friction protrusion;

[0032] 8. Roller bearing; 81. Outer ring; 82. Rolling element; 83. Inner ring. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] like Figures 1-3 As shown, this utility model provides a foreign object protection snare, including a core rod 1, a slider 2, an outer tube 3, and a snare assembly. The slider 2 is slidably sleeved on the core rod 1, and the outer tube 3 is connected to the core rod 1. The snare assembly includes a snare ring 4, a traction wire 5, and a transparent silicone pocket 6. The unfolded snare ring 4 has an elliptical structure, and its free end forms a pointed tip. The unfolded silicone pocket 6 has a semi-ellipsoidal structure, which is adapted to the shape of the snare ring 4. Several drainage holes 61 are opened in the middle of the transparent silicone pocket. One end of the traction wire 5 is connected to the fixed end of the snare ring 4, and the other end passes through the outer tube 3 and is connected to the slider 2.

[0035] By simplifying the design of the snare assembly, the combination of an elliptical snare ring 4 and a semi-ellipsoidal silicone awl 6 better accommodates foreign objects of different shapes. Specifically, compared to the circular snare rings in the prior art, the snare ring 4 of this invention presents an elliptical structure after unfolding, with its free end forming a sharp point, allowing the snare ring 4 to more easily capture and retrieve foreign objects. The transparent silicone awl 6, after unfolding, presents a semi-ellipsoidal structure with a large coverage area, providing good support and enveloping force when enveloping foreign objects, better enveloping them, and allowing doctors to intuitively and clearly observe the position and condition of the foreign object, improving the efficiency and safety of the surgery, while also reducing manufacturing difficulty and cost. Simultaneously, due to the soft and elastic properties of the silicone awl 6, it can also soften the sharp end of the foreign object, preventing it from scratching the digestive tract wall. Furthermore, the drainage hole 61 on the silicone awl 6 facilitates the drainage of liquid carried by the foreign object, further improving the clarity of the surgery. This invention is particularly suitable for handling sharp foreign objects in the digestive tract, effectively protecting the digestive tract wall from damage. It can also be applied to other types of foreign body removal surgeries.

[0036] By sliding slider 2, the doctor can control the expansion and contraction of the snare ring 4 and the silicone pouch 6 to capture and release foreign objects.

[0037] As an optional implementation, the open end of the silicone pouch 6 covers the loop 4 and is folded over to connect to the main body of the silicone pouch 6.

[0038] Furthermore, the silicone pouch 6 is made of transparent, high-strength, highly elastic, and wear-resistant medical-grade liquid silicone material.

[0039] Compared to the suture connection in existing technologies, the silicone apron 6 of this invention can be integrally molded using a mold-forming technology. Specifically, the ring 4 is first formed, and then the silicone apron 6 is connected to the ring 4 in the mold, so that the silicone apron 6 can tightly cover the ring 4, which can improve the connection stability and reliability between the silicone apron 6 and the ring 4, and prevent the silicone apron 6 from falling off the ring 4 during surgery.

[0040] The fixed end of the snare ring 4 can be formed into a sharp point, meaning that both ends of the snare ring 4 are sharp points, which better captures foreign objects. Moreover, under the protection of the silicone sac 6, the sharp point of the snare ring 4 remains gentle when it comes into contact with the digestive tract wall, avoiding scratches.

[0041] As an optional implementation, the drainage holes 61 are arranged in a matrix on the silicone pouch 6.

[0042] This setup allows for more effective drainage of fluids carried by foreign objects, maintaining a clear surgical field of vision.

[0043] The diameter and number of drainage holes 61 are designed according to the usage requirements, as long as they can allow the liquid to flow out smoothly while preventing the sharp ends of most foreign objects from passing through.

[0044] As an optional implementation, the outer tube 3 includes a first straight tube 31, a tapered tube 32, and a second straight tube 33 connected in sequence. The core rod 1 is sleeved on the second straight tube 33. The first straight tube 31 is located close to the collar 4. The inner diameter of the first straight tube 31 is larger than the inner diameter of the second straight tube 33. The inner diameter of the tapered tube 32 gradually decreases in the direction of the second straight tube 33.

[0045] The first straight tube 31 has a large diameter, which facilitates the deployment of the snare assembly and the capture of foreign objects. It also provides a certain buffer space for the captured foreign objects, which helps protect the sharp ends of the foreign objects. In conjunction with the silicone pocket 6, it plays a dual protection role during the removal process.

[0046] The inner diameter of the tapered tube 32 gradually decreases, providing a more stable guiding and supporting effect for the snare assembly.

[0047] As an optional implementation, the core rod 1 has a cuboid structure and is provided with a sliding groove 11. The sliding groove 11 is connected to the second straight tube 33, and the slider 2 is slidably connected to the sliding groove 11.

[0048] Furthermore, the groove 11 extends through the core rod 1 along its width direction.

[0049] The slider 2 is fitted onto the core rod 1 and slidably connected to the groove 11. The doctor drives the slider 2 to move back and forth along the groove 11 to expand and contract the ring 4 and the silicone apron 6, thereby capturing and releasing foreign objects. The specific sliding connection structure between the slider 2 and the core rod 1 is existing technology and will not be described in detail here.

[0050] As an optional implementation, a first gripping ring 12 is provided at the end of the core rod 1 away from the loop ring 4, and a second gripping ring 21 is provided at both ends of the slider 2.

[0051] The cooperation of the first gripping ring 12 and the second gripping ring 21 makes it easier for doctors to operate and control the procedure.

[0052] As an optional implementation, a scale line 14 is provided on the outer wall surface of the core rod 1.

[0053] Furthermore, the scale lines 14 are arranged sequentially along the length of the core rod 1, allowing doctors to more intuitively observe the relative position of the slider 2 and the core rod 1 during the operation, and thus more accurately judge the degree of unfolding of the snare assembly.

[0054] As an optional implementation, it also includes a gripper 7, which is rotatably sleeved on the core rod 1. Friction protrusions 71 are provided on the outer wall surface of the gripper 7, and the friction protrusions 71 are arranged circumferentially along the gripper 7.

[0055] Furthermore, a connecting post 13 is provided at one end of the core rod 1 near the collar ring 4. The connecting post 13 is sleeved on the second straight tube body 33 and communicates with the slide groove 11. The gripping member 7 is sleeved on the core rod 1 via a self-locking roller bearing 8. The inner ring 83 of the roller bearing 8 is fixedly sleeved on the connecting post 13, and the outer ring 81 of the roller bearing 8 is disposed on the inner wall surface of the gripping member 7. The rolling elements 82 of the roller bearing 8 are located between the inner ring 83 and the outer ring 81, so that relative rotation can occur between the two, thereby realizing relative rotation between the gripping member 7 and the core rod 1.

[0056] When the doctor holds the gripper 7, he can rotate the core rod 1 to drive the ring 4 and the silicone pouch 6 to rotate and adjust their position in the digestive tract.

[0057] The design of the friction protrusions 71 increases the friction when the doctor holds the device. Since the friction protrusions 71 are arranged circumferentially along the grip 7, they also serve as angle scales to indicate the rotation angle of the core rod 1. Because the core rod 1 has a cuboid structure, its corners can serve as angle indicators. When the core rod 1 rotates, its corners will form a visual correspondence with the friction protrusions 71 on the grip 7, allowing the doctor to accurately judge the rotation angle of the core rod 1.

[0058] It should be noted that the self-locking roller bearing 8 is a mature rolling bearing product in the existing technology. The self-locking function is achieved by adjusting the internal clearance of the roller bearing 8 or adding preload shims to increase its friction. This ensures that the relative position between the gripper 7 and the core rod 1 remains fixed when no external force is applied, and relative rotation only occurs between the gripper 7 and the core rod 1 when driven by sufficient external force.

[0059] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0060] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of this utility model, it should also 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "a particular example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A foreign object protection snare, comprising: The application relates to a core rod, a sliding block, an outer tube and a snare assembly, the sliding block is sleeved on the core rod, the outer tube is connected with the core rod; the snare assembly comprises a snare ring, a traction wire and a transparent silica gel bag, the snare ring is in an elliptical structure after being unfolded, and a free end of the snare ring forms a pointed end; the silica gel bag is in a semi-ellipsoidal structure after being unfolded, the silica gel bag is matched with the shape of the snare ring, a plurality of drainage holes are arranged in the middle of the transparent silica gel bag; one end of the traction wire is connected with a fixed end of the snare ring, and the other end of the traction wire is connected with the sliding block through the outer tube.

2. The foreign body protection snare of claim 1, wherein, The opening end of the silica gel bag is wrapped around the snare ring and the main body of the silica gel bag is folded.

3. The foreign body protection snare of claim 1, wherein, The drainage holes are arranged in a matrix on the silica gel bag.

4. The foreign object protection snare of claim 1, wherein, The outer tube comprises a first straight tube body, a tapered tube and a second straight tube body which are sequentially communicated, the core rod is sleeved on the second straight tube body, the first straight tube body is arranged close to the snare ring, the inner diameter of the first straight tube body is larger than that of the second straight tube body, and the inner diameter of the tapered tube gradually decreases towards the second straight tube body.

5. The foreign body protection snare of claim 4, wherein, The core rod is in a cuboid structure and is provided with a sliding groove, the sliding groove is communicated with the second straight tube body, and the sliding block is slidably connected with the sliding groove.

6. The foreign body protection snare of claim 1, wherein, A first holding ring is arranged at one end of the core rod away from the snare ring, and second holding rings are arranged at two ends of the sliding block.

7. The foreign body protection snare of claim 1, wherein, Scale lines are arranged on the outer wall surface of the core rod.

8. The foreign body protection snare of claim 5, wherein, The application further relates to a holding piece, the holding piece is rotatably sleeved on the core rod, friction protrusions are arranged on the outer wall surface of the holding piece, and the friction protrusions are arranged along the circumference of the holding piece.

Images