Endoscope snare with replaceable sleeve head

Abstract

The utility model relates to the technical field of medical instruments, in particular to an endoscope snare with a replaceable sleeve head. According to the technical scheme, a wire pipe is inserted into a sleeve, a pull wire is arranged in the wire pipe, one end of the pull wire is connected with a sleeve ring through a connecting block, an end is installed at the tail end of the sleeve ring, the pull wire is fixedly connected with the sleeve through threads, the pull wire is provided with a limiting block, a threaded column is arranged on the limiting block, and the threaded column is connected with the sleeve. A containing groove is formed in the connecting block, a clamping groove is formed in an opening of the containing groove, a limiting groove is formed in the containing groove, a nut seat is installed in the containing groove in a limiting mode through the limiting groove, and the pull wire is fixedly connected with the connecting block through a threaded column and the nut seat. The sleeve ring can be replaced, which means that a doctor can select a proper sleeve head according to different operation requirements, so that the adaptability and the flexibility of an operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an endoscope snare with a replaceable snare head. Background Technology

[0002] The snare is primarily used for the removal of polyps in the digestive tract, including raised lesions, flat lesions, and even early-stage digestive tract cancers (such as EMR and MBM). In addition, it is also used in other medical procedures based on similar principles, such as gastric stone fragmentation, foreign body removal (using a mesh bag), assisting ultra-fine endoscopes in entering the bile duct for observation and treatment, and in ERCP baskets and "emergency lithotripters."

[0003] A search revealed that patent CN202222835328.8 discloses an endoscopic snare. Although this device is inserted into the endoscope tip through the endoscope forceps channel, and the snare is used to encircle the tissue and then tightened, the snare separates from the connecting part while tightening the tissue, which can achieve endoscopic closure of cavities such as gallbladder incision, gallbladder duct, and jejunum. It can also be used for tissue ligation and hemostasis. However, the tip of this device cannot be replaced during use. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an endoscope snare with a replaceable snare head, solving the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows:

[0006] An endoscope snare with a replaceable snare head includes a sleeve, a wire tube inserted inside the sleeve, a pull wire inside the wire tube, one end of the pull wire being connected to a snare via a connecting block, and an end cap being installed at the end of the snare.

[0007] The pull wire is fixed to the sleeve by a thread. The pull wire is provided with a limiting block. The limiting block is provided with a threaded post. The connecting block is provided with a receiving groove. The opening of the receiving groove is provided with a locking groove. The receiving groove is provided with a limiting groove. A nut seat is installed in the receiving groove by limiting the limiting groove. The pull wire is fixed to the connecting block by the threaded post and the nut seat.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the sleeve is provided with a hand guard on the outside, and the two hand guards are symmetrically distributed on both sides of the sleeve.

[0010] The beneficial effects of adopting the above-mentioned further solutions are:

[0011] The hand guards are designed to provide the operator with a stable and comfortable grip. During surgery, surgeons need to manipulate the endoscopic snare for extended periods with high precision; the hand guards effectively reduce hand fatigue and improve operational stability. The symmetrically distributed hand guards ensure greater balance of the cannula during operation, reducing the risk of accidents caused by instability. Simultaneously, the hand guards also help prevent the cannula from slipping or becoming uncontrollable during surgery, thus enhancing surgical safety.

[0012] Furthermore, the end of the pull cord away from the collar is provided with a pull handle. The pull cord is pulled by the pull handle, which in turn pulls the collar, causing the collar to retract into the tube, thereby reducing the diameter of the collar.

[0013] The beneficial effects of adopting the above-mentioned further solutions are:

[0014] The handle design allows surgeons to intuitively control the extension and retraction of the suture by gripping and pulling the handle, thereby manipulating the contraction and expansion of the snare. This operation method is simple and easy to understand, requiring no complex training or learning, and can be quickly mastered. By pulling the suture with the handle, surgeons can achieve precise control over the snare's movement. Whether it's necessary to slowly adjust the snare's contraction or to quickly tighten it, this can be achieved by adjusting the pull force and direction of the handle. The handle design allows surgeons to operate the endoscopic snare more efficiently during surgery. By quickly and accurately pulling the handle, surgeons can rapidly grasp or release the target tissue, thereby shortening surgical time and improving surgical efficiency.

[0015] Furthermore, the nut seat is slidably installed in the receiving groove via a limiting groove.

[0016] The beneficial effects of adopting the above-mentioned further solutions are:

[0017] The limiting groove provides a precise sliding track for the nut seat, ensuring that it slides along a predetermined path within the receiving groove. This design helps improve the accuracy and stability of the mechanical device, allowing the nut seat to be accurately positioned as needed. By sliding the nut seat within the receiving groove and using the limiting groove for restraint, the structural stability of the mechanical device can be significantly enhanced. This design helps prevent the nut seat from wobbling or shifting under load, thereby improving the reliability and durability of the entire device.

[0018] Furthermore, the position and size of the limiting block and the slot are adapted to each other. The limiting block is provided with a protruding buckle, and the slot is provided with a groove corresponding to the buckle. The limiting block and the slot are locked together by the buckle.

[0019] The beneficial effects of adopting the above-mentioned further solutions are:

[0020] The position and size of the limiting block and the slot are matched to ensure a tight fit between them. The interlocking of the snap-fit ​​and the groove forms a stable mechanical connection, preventing loosening or detachment under stress. This design improves the overall stability and reliability of the mechanical device. The snap-fit ​​and groove design makes the connection between the limiting block and the slot simple and quick. The limiting block and slot can be quickly installed and removed without the need for additional tools or complicated procedures. This design improves work efficiency and reduces operational difficulty.

[0021] This invention provides an endoscope snare with a replaceable snare head. It has the following advantages:

[0022] By inserting a connecting tube inside the cannula and setting a pull wire within the tube, remote control of the ring is achieved. This design allows surgeons to control the ring's movement more flexibly and precisely during operation, improving surgical efficiency and safety. The hand guard design not only provides a comfortable grip but also enhances operational stability, further increasing the success rate of the surgery.

[0023] By pulling the cable with the handle, the contraction and expansion of the noose can be easily controlled, thereby grasping or releasing the target tissue. This design allows the surgeon to adjust the noose's position as needed during surgery, improving surgical flexibility and controllability. Furthermore, the noose is replaceable, meaning the surgeon can choose the appropriate noose tip according to different surgical needs, thus increasing surgical adaptability and flexibility. This design also reduces the cost of replacing the entire instrument due to tip damage or wear, improving the instrument's economic efficiency.

[0024] The pull wire and sleeve are fixed by a threaded connection, which is not only stable and reliable but also facilitates disassembly and maintenance. The design of the limiting block and the slot makes the connection between the connecting block and the pull wire more secure, preventing them from falling off or loosening, thus ensuring the smooth progress of the operation. The nut seat is slidably installed in the receiving groove through the limiting groove. This design not only facilitates the sliding of the connecting block but also further enhances the stability of the connection through the interlocking of the limiting block and the slot. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the main appearance of this utility model;

[0028] Figure 2This is a bottom view of the present invention.

[0029] Figure 3 This is a schematic diagram of the pull cord of this utility model;

[0030] Figure 4 This is a cross-sectional view of the connecting block of this utility model.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. End; 2. Collar; 3. Conduit; 4. Sleeve; 5. Handguard; 6. Pull handle; 7. Connecting block; 701. Receiving groove; 702. Limiting block; 703. Pull wire; 704. Threaded post; 705. Slot; 706. Nut seat; 707. Limiting groove. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1 to 4 As shown, the embodiments provided by this utility model are as follows:

[0035] Example 1

[0036] An endoscopic snare with a replaceable tip includes a cannula 4. Two hand guards 5 are symmetrically distributed on both sides of the cannula 4, providing the operator with a stable and comfortable grip. During surgery, surgeons need to operate the endoscopic snare with high precision for extended periods; the hand guards 5 effectively reduce hand fatigue and improve operational stability. The symmetrically distributed hand guards 5 make the cannula 4 more balanced during operation, reducing the risk of accidents caused by instability. Meanwhile, the hand guard 5 can also prevent the cannula 4 from slipping or becoming uncontrollable during surgery, thus enhancing the safety of the operation. A suture tube 3 is inserted inside the cannula 4, and a pull wire 703 is installed inside the suture tube 3. One end of the pull wire 703 is connected to a collar 2 via a connecting block 7. A handle 6 is located at the end of the pull wire 703 opposite to the collar 2. Pulling the pull wire 703 via the handle 6 pulls the collar 2, causing it to retract into the suture tube 3, thus reducing the diameter of the collar 2. The design of the handle 6 allows the doctor to intuitively control the extension and retraction of the pull wire 703 by holding and pulling the handle 6, thereby controlling the contraction and expansion of the collar 2. This operation method is simple and easy to understand, requiring no complex training or learning, and can be quickly mastered. By pulling the pull wire 703 via the handle 6, the doctor can achieve precise control over the movement of the collar 2. Whether the tightening of the snare 2 needs to be adjusted slowly or quickly, this can be achieved by adjusting the pulling force and direction of the handle 6. The design of the handle 6 allows the surgeon to operate the endoscopic snare more efficiently during surgery. By pulling the handle 6 quickly and accurately, the surgeon can rapidly grasp or release the target tissue, thereby shortening the operation time and improving surgical efficiency. The end cap 1 is installed at the end of the snare 2.

[0037] Example 2

[0038] To facilitate the replacement of ring 2, for example, as shown... Figures 1 to 4As shown, the present invention further includes: a pull wire 703 connected and fixed to the sleeve 4 by threads; the pull wire 703 is provided with a limiting block 702; the limiting block 702 is provided with a threaded post 704; the connecting block 7 is provided with a receiving groove 701; a slot 705 is provided at the opening of the receiving groove 701; the position and size of the limiting block 702 and the slot 705 are adapted to each other; the limiting block 702 is provided with a protruding buckle; the slot 705 is provided with a groove corresponding to the buckle; and the limiting block 702 and the slot 705 are mutually engaged and fixed by the buckle. The matching position and size of the limiting block 702 and the slot 705 ensure a tight fit between the two. The mutual engagement of the buckle and the groove forms a stable mechanical connection, preventing loosening or detachment under stress. This design improves the overall stability and reliability of the mechanical device. The buckle and groove design makes the connection between the limiting block 702 and the slot 705 simple and quick. The limiting block 702 and the slot 705 can be quickly installed and removed without the need for additional tools or complicated operating procedures. This design improves work efficiency and reduces operational difficulty. A limiting groove 707 is provided within the receiving groove 701, and a nut seat 706 is installed within the receiving groove 701 via the limiting groove 707. The nut seat 706 is slidably installed within the receiving groove 701 via the limiting groove 707, facilitating the sliding of the connecting block 7. It is then interlocked and fixed by the limiting block 702 and the slot 705. The limiting groove 707 provides a precise sliding track for the nut seat 706, ensuring that the nut seat 706 can slide along a predetermined path within the receiving groove 701. This design helps improve the accuracy and stability of the mechanical device, allowing the nut seat 706 to be accurately positioned as needed. By sliding the nut seat 706 within the receiving groove 701 and using the limiting groove 707 for limiting, the structural stability of the mechanical device can be significantly enhanced. This design helps prevent the nut seat 706 from shaking or shifting under force, thereby improving the reliability and durability of the entire device. The pull wire 703 is connected and fixed to the connecting block 7 through the threaded post 704 and the nut seat 706. The threaded post 704 and the nut seat 706 are limited after connection by the limiting block 702 and the connecting block 7.

[0039] Working principle:

[0040] A pull cord 703 passes through the tubing 3, with one end connected to the collar 2 via a connecting block 7, and the other end equipped with a pull handle 6. The doctor can remotely control the extension and retraction of the pull cord 703 by holding and pulling the handle 6, thereby causing the collar 2 to contract and expand. When the pull cord 703 is pulled, the collar 2 is pulled back into the tubing 3, and its diameter decreases accordingly. When the handle 6 is released, the tension in the pull cord 703 disappears, and the collar 2 returns to its original state, i.e., its expanded state, under its own elasticity or external thrust.

[0041] When replacing end 1, first disconnect the fixed connection between the collar 2 and the pull wire 703 via the connecting block 7, then remove the original collar 2 and install the new collar 2. The pull wire 703 is fixed to the sleeve 4 via threads, ensuring a stable connection between the pull wire 703 and the sleeve 4.

[0042] The nut seat 706 is slidably mounted in the receiving groove 701 via the limiting groove 707 and is connected to the threaded post 704. This design not only facilitates the sliding adjustment of the connecting block 7, but also enhances the stability of the connection through the threaded connection between the nut seat 706 and the threaded post 704. The connecting block 7 has a receiving groove 701 and a retaining groove 705, and the limiting block 702 has a threaded post 704 and a snap fastener. When the limiting block 702 is inserted into the receiving groove 701, the snap fastener and the retaining groove 705 engage and fix each other, thereby preventing the nut seat 706 from automatically rotating and disengaging from the threaded post 704.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An endoscope snare with a replaceable snare head, comprising a sleeve (4), wherein a wire tube (3) is inserted inside the sleeve (4), and a pull wire (703) is provided inside the wire tube (3), one end of the pull wire (703) is connected to a snare (2) via a connecting block (7), and an end cap (1) is installed at the end of the snare (2), characterized in that: The pull wire (703) is connected and fixed to the sleeve (4) by threads. The pull wire (703) is provided with a limiting block (702). The limiting block (702) is provided with a threaded post (704). The connecting block (7) is provided with a receiving groove (701). The opening of the receiving groove (701) is provided with a slot (705). The receiving groove (701) is provided with a limiting groove (707). The receiving groove (701) is provided with a nut seat (706) which is limited and installed in the receiving groove (701) by the limiting groove (707). The pull wire (703) is connected and fixed to the connecting block (7) by the threaded post (704) and the nut seat (706).

2. The endoscope snare with a replaceable head according to claim 1, characterized in that: The sleeve (4) is provided with a handguard (5) on the outside, and the two handguards (5) are symmetrically distributed on both sides of the sleeve (4).

3. The endoscope snare with a replaceable head according to claim 1, characterized in that: The pull wire (703) has a handle (6) at the end away from the collar (2). The pull wire (703) is pulled by the handle (6), and then the collar (2) is pulled by the pull wire (703), so that the collar (2) retracts into the tube (3), thereby reducing the diameter of the collar (2).

4. The endoscope snare with a replaceable head according to claim 1, characterized in that: The nut seat (706) is slidably installed in the receiving groove (701) through the limiting groove (707).

5. The endoscope snare with a replaceable head according to claim 1, characterized in that: The position and size of the limiting block (702) and the slot (705) are adapted to each other. The limiting block (702) is provided with a protruding buckle, and the slot (705) is provided with a groove corresponding to the buckle. The limiting block (702) and the slot (705) are fixed to each other by buckle.

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