Detachable snare

By designing a removable snare, utilizing a traction wire and slip ring structure, the existing snare is solved by solving the problem of impact on the field of vision and high surgical risks when cutting larger polyps or tumors, achieving more efficient surgical operations and lower risks.

CN222889008UActive Publication Date: 2025-05-23GENERAL HOSPITAL OF THE NORTHERN WAR ZONE OF THE CHINESE PEOPLES LIBERATION ARMY +1
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Patent Information

Application Number
CN202421542693.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-02
Publication Date
2025-05-23
Estimated Expiration
2034-07-02

AI Technical Summary

Technical Problem

In surgical procedures, when the existing snail is cut by a larger polyp or tumor, the cut tissue is covered on the electrocution knife, which affects the field of surgery and is prone to excessive cutting. It is limited by the number of endoscopic tracts, increasing the risk of surgery.

Method used

A removable snail is designed, with the handle part being removable, and the traction wire remains in the human cavity. The opening and closing state of the snail is controlled through the slip ring and the clamping device to achieve rapid separation and reconnection, ensuring that the relative position of the traction wire remains unchanged.

Benefits of technology

Through the design of the traction wire, the pulling state is kept unchanged, which facilitates the electric knife to cut the lesion tissue, improves the vision and success rate of the surgery, and reduces the risk of surgery.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a detachable snare, which comprises a snare, a traction steel wire, a protective sleeve, a sliding ring and a sliding rod, the front end part of the sliding rod is connected with a quick-connection plug, the quick-connection plug consists of a detachable part and a locking part, the detachable part is connected with the sliding rod, and the locking part is coaxially matched with the middle part of the traction steel wire; in a non-dismounting state, the detachable part and the locking part are clamped and positioned, and the locking part and the traction steel wire are in a non-locking state; the front end of the traction steel wire is connected with the ring sleeve, the rear end of the traction steel wire sequentially penetrates through the protective sleeve and the quick plug and then is connected with the clamping device, and the clamping device is slidably connected with a sliding groove of the sliding rod through a sliding ring. In a dismounting state, the locking part and the middle part of the traction steel wire are in a locking state, the detachable part is separated from the locking part, and the tail end of the traction steel wire is separated from the clamping device. The handle part of the detachable snare is detachable, the traction steel wire is reserved in a human body cavity, the traction state is kept unchanged, an electric knife can conveniently cut focus tissue, the operation view is improved, and the operation success rate is increased.
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Description

Technical Field

[0001] The utility model relates to a detachable snare and belongs to the technical field of medical instruments. Background Art

[0002] The snare is a commonly used surgical instrument for removing polyps and tumors in various organ cavities of the human body. In routine operations, for small polyps, the snare is first passed through an endoscope into the human body cavity, and the diseased tissue is snare-stripped and then withdrawn from the endoscope. For larger polyps or tumors, the electrosurgical knife enters the human body through the endoscope clamp channel for cutting. During the cutting process, the cut tissue polyps will cover the electrosurgical knife, affecting the surgical field of view and easily causing over-cutting. Due to the limitation of the number of endoscopic cavities, after the cutting is completed, the instrument needs to be withdrawn from the endoscope clamp channel, and then the hemostatic clip is inserted into the endoscope clamp channel for tissue suturing, which increases the risk of surgery. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a detachable snare, the handle part of which is detachable, and the traction wire is left in the human body cavity to keep the traction state unchanged, so as to facilitate the electric knife to cut the lesion tissue, improve the surgical field of view, and improve the success rate of the operation.

[0004] To solve the above problems, the specific technical scheme of the utility model is as follows: a detachable snare, comprising a snare, a traction wire, a protective sleeve, a slip ring and a slide rod, a quick-connect plug is connected to the front end of the slide rod, the quick-connect plug consists of a detachable part and a locking part, the detachable part is connected to the slide rod, and the locking part is coaxially matched with the middle part of the traction wire; in the non-detachable state, the detachable part and the locking part are clamped and positioned, and the tightening part and the traction wire are in a non-locked state; the front end of the traction wire is connected to the snare, and the rear end of the traction wire is connected to the clamping device after passing through the protective sleeve and the quick-connect plug in turn, and the clamping device is slidably connected to the slide groove of the slide rod through the slip ring; in the disassembled state, the locking part and the middle part of the traction wire are in a locked state, the detachable part and the locking part are separated, and the end of the traction wire is separated from the clamping device.

[0005] The clamping device includes a connector, a first knob and a first connecting tube; a transverse through hole is provided on the connector, one end of the through hole is inserted into the first connecting tube, and the exposed end of the first connecting tube is fixedly connected to the traction wire; a longitudinal threaded hole is provided on the connector, and the bottom surface of the screw of the first knob is pressed and contacted with the outer circumference of the first connecting tube through the threaded hole; the end of the connector away from the traction wire is connected to the slip ring.

[0006] The through hole at one end of the connector away from the traction wire is inserted into the second connecting tube; a longitudinal threaded hole is also provided on the connector, and the bottom surface of the screw of the second knob is pressed and contacted with the outer circumference of the second connecting tube through the threaded hole; the rear end of the second connecting tube is connected to the slip ring.

[0007] A joint is provided in the inner cavity of the slip ring, and the joint is slidably connected to the sliding groove of the sliding rod; the upper end of the joint is threadedly connected to the electrode, and the top of the electrode extends out of the slip ring; the lower end of the joint is fixedly connected to the second connecting pipe.

[0008] The detachable part of the quick-connect plug includes an outer sheath and a plug-in pin, and the locking part includes a locking sleeve and a positioning tube; one end of the outer sheath is connected to the sliding rod, and a plug-in hole is provided at the center of the other end, and a locking sleeve is provided in the plug-in hole, and an annular groove is provided on the circumferential surface of the inner end of the locking sleeve, and the plug-in pin with an elastic structure radially extends into the outer sheath and is clamped on the annular groove; the inner holes adjacent to the locking sleeve and the protective sleeve are respectively provided with internal threaded holes, and the two ends of the positioning tube are respectively connected with the internal threads of the locking sleeve and the protective sleeve; a plurality of axial opening grooves are provided at the end of the positioning tube located in the inner cavity of the locking sleeve, and a conical necking structure is provided at the end of the positioning tube; a conical surface is provided on the inner circumference of the through hole of the locking sleeve and at a depth greater than the internal thread, and the conical surface at the end of the positioning tube cooperates with the conical surface of the locking sleeve.

[0009] A threaded platform is provided at the upper end of the outer circumference of the outer sheath tube, the threaded platform is threadedly connected to the nut, and the plug-in pin is coaxially matched with the threaded platform; a limit platform is provided on the plug-in pin, and the spring inside the threaded platform is coaxially matched with the outer circumference of the plug-in pin, and one end is supported on the limit platform of the plug-in pin, and the other end is supported on the inner end surface of the nut; the upper end of the plug-in pin extends out of the nut and is connected to the plug-in button.

[0010] The detachable snare of the present application adopts the above structure and has the following advantages:

[0011] 1. By controlling the forward and backward movement of the slip ring and the wire clamping device, the opening and closing state of the snare can be controlled, and the lesion tissue can be pulled as needed;

[0012] 2. The quick-connect plug is provided with a detachable part and a locking part, which can not only realize the rapid separation of the slide bar and the traction wire, but also ensure that the relative position relationship between the protective cover and the traction wire remains unchanged during the separation process through the locking part;

[0013] 3. The wire clamping device is provided with a connector, a first connecting tube and a first knob structure, and the traction wire can be loosened and separated by rotating the first knob;

[0014] 4. A second connecting tube and a second knob structure are provided. The second connecting tube can be connected to the slip ring without changing the original sliding rod and slip ring structure, and the electrode can be connected to the electrode through the joint to effectively realize the electrification function of the traction wire.

[0015] 5. After the middle and tail parts of the wire are separated, the traction wire remains in the human body, and the endoscope is inserted into the human cavity again. The medical staff manipulates other instruments to insert into the endoscope forceps channel, solving the problem of insufficient endoscope forceps channel and reducing surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the detachable snare.

[0017] Figure 2 for Figure 1 A local enlarged view of location I.

[0018] Figure 3 for Figure 2 A partial enlarged view of .

[0019] Figure 4 for Figure 1 A partial enlarged view of location II. DETAILED DESCRIPTION

[0020] like Figures 1 to 4 As shown, a detachable snare comprises a snare 1, a traction wire 2, a protective sleeve 3, a slip ring 4 and a slide rod 5, a quick-connect plug 10 is connected to the front end of the slide rod 5, the quick-connect plug 10 consists of a detachable part and a locking part, the detachable part is connected to the slide rod 5, and the locking part is coaxially matched with the middle part of the traction wire 2; in the non-detachable state, the detachable part and the locking part are snap-fitted and positioned, and the tightening part and the traction wire 2 are in a non-locked state; the front end of the traction wire 2 is connected to the snare 1, and the rear end of the traction wire 2 passes through the protective sleeve 3 and the quick-connect plug 10 in turn and is connected to the clamping device 20, and the clamping device 20 is slidably connected to the slide groove of the slide rod 5 through the slip ring 4; in the detachable state, the locking part and the middle part of the traction wire 2 are in a locked state, the detachable part and the locking part are separated, and the end of the traction wire 2 is separated from the clamping device 20. The quick-connect plug 10 adopts a detachable part to realize the rapid separation of the protective cover 3 and the slide rod 5, and the clamping device 20 realizes the rapid separation of the traction wire 2 and the slip ring 4. At the same time, the relative position relationship between the protective cover 3 and the traction wire 2 is realized through the locking part of the quick-connect plug 10, thereby ensuring the tightness of the front-end snare 1 on the human tissue, eliminating the space occupied by the slide rod 5 and the slip ring 4 when not working.

[0021] The clamping device 20 includes a connector 21, a first knob 22 and a first connecting tube 23; a transverse through hole is provided on the connector 21, one end of the through hole is inserted into the first connecting tube 23, and the exposed end of the first connecting tube 23 is fixedly connected to the traction wire 2; a longitudinal threaded hole is provided on the connector 21, and the bottom surface of the screw of the first knob 22 is pressed and contacted with the outer circumference of the first connecting tube 23 through the threaded hole; the end of the connector 21 away from the traction wire 2 is connected to the slip ring 4. When the first knob 22 is rotated, the first connecting tube 23 connected to the traction wire 2 is loosened, so that the traction wire 2 is quickly separated from the slip ring 4 through the connector 21.

[0022] The through hole at one end of the connector 21 away from the traction wire 2 is inserted into the second connection tube 24; a longitudinal threaded hole is also provided on the connector 21, and the bottom surface of the screw of the second knob 25 is pressed and contacted with the outer circumference of the second connection tube 24 through the threaded hole; the rear end of the second connection tube 24 is connected to the slip ring 4. A joint 26 is provided in the inner cavity of the slip ring 4, and the joint 26 is slidably connected to the slide groove of the slide rod 5; the upper end of the joint 26 is threadedly connected to the electrode 6, and the top of the electrode 6 extends out of the slip ring 4; the lower end of the joint 26 is fixedly connected to the second connection tube 24. The second connection tube 24 not only serves as a connection between the connector and the slip ring, but also the electrode 6 can enable the traction wire 2 to work live through the second connection tube 24.

[0023] The detachable part of the quick-connect plug 10 includes an outer sheath 11 and a plug pin 13, and the locking part includes a locking sleeve 12 and a positioning tube 18; one end of the outer sheath 11 is connected to the slide rod 5, and a plug hole is provided in the center of the other end, and a locking sleeve 12 is provided in the plug hole. An annular groove 14 is provided on the circumferential surface of the inner end of the locking sleeve 12, and the plug pin 13 with an elastic structure radially extends into the outer sheath 11 and is clamped on the annular groove 14; the inner holes adjacent to the locking sleeve 12 and the protective sleeve 3 are respectively provided with internal threads, and the two ends of the positioning tube 18 are respectively connected with the internal threads of the locking sleeve 12 and the protective sleeve 3; a plurality of axial opening grooves are provided at the end of the positioning tube 18 located in the inner cavity of the locking sleeve 12, and a conical necking structure is provided at the end of the positioning tube 18; a conical surface is provided on the inner circumference of the through hole of the locking sleeve 12 and at a depth greater than the internal thread, and the conical surface at the end of the positioning tube 18 cooperates with the conical surface of the locking sleeve 12. When the positioning tube 18 is continuously screwed in through the internal thread, the conical surface at the end of the positioning tube 18 continuously moves toward the small diameter direction of the conical surface of the locking sleeve 12, and the conical surface of the locking sleeve 12 presses the axial opening groove of the positioning tube 18, thereby clamping the traction wire 2 in the positioning tube 18, completing the function of keeping the relative position between the protective cover 3 and the traction wire 2 unchanged.

[0024] The upper end of the outer circumference of the outer sheath tube 11 is provided with a threaded platform 19, the threaded platform 19 is threadedly connected to the nut 15, and the plug-in pin 13 is coaxially matched with the threaded platform 19; a limit platform is provided on the plug-in pin 13, and the spring 16 inside the threaded platform 19 is coaxially matched with the outer circumference of the plug-in pin 13, and one end is supported on the limit platform of the plug-in pin 13, and the other end is supported on the inner end surface of the nut; the upper end of the plug-in pin 13 extends out of the nut 15 and is connected to the plug-in button 17. The plug-in button 17 is further provided. When the plug-in button 17 is pulled upward, the elastic pressure of the spring 16 is overcome, so that the plug-in pin 13 is disengaged from the annular groove 14, completing the function of quick separation.

[0025] A method for using a detachable snare comprises the following steps:

[0026] Step 1: Before use, the snare 1 is located in the protective cover 3, the detachable part and the locking part of the quick-connect plug 10 are in a clamping and positioning state, and the locking part and the traction wire 2 are in a non-locking state;

[0027] Step 2: When working, push the slip ring 4 forward, drive the traction wire 2 to drive the snare 1 to move forward and break away from the protective sleeve 3, and the snare 1 automatically opens; after ligating the tissue, pull the slip ring 4 backward first, and the tail of the snare 1 enters the protective sleeve 3, so that the front end of the snare 1 is closed; then the locking part and the traction wire 2 are locked;

[0028] Step 3: During disassembly, the clamping device 20 is disengaged from the rear end of the traction wire 2, and the detachable part of the quick-connect plug 10 is separated from the locking part, so that the slide rod 5, the slip ring 4 and the detachable part of the quick-connect plug 10 are completely separated from the traction wire 2.

Claims

1. A detachable snare, comprising a snare (1), a traction wire (2), a protective sleeve (3), a slip ring (4) and a slide rod (5), characterized in that: A quick-connect plug (10) is connected to the front end of the slide bar (5), and the quick-connect plug (10) consists of a detachable part and a locking part. The detachable part is connected to the slide bar (5), and the locking part is coaxially matched with the middle part of the traction wire (2); in the non-detachable state, the detachable part and the locking part are clamped and positioned, and the locking part and the traction wire (2) are in a non-locked state; the front end of the traction wire (2) is connected to the loop (1), and the rear end of the traction wire (2) passes through the protective cover (3) and the quick-connect plug (10) in sequence and is connected to the clamping device (20), and the clamping device (20) is slidably connected to the slide groove of the slide bar (5) through the slip ring (4); in the detachable state, the locking part and the middle part of the traction wire (2) are in a locked state, the detachable part and the locking part are separated, and the end of the traction wire (2) is separated from the clamping device (20).

2. The detachable snare according to claim 1, characterized in that: The clamping device (20) comprises a connector (21), a first knob (22) and a first connecting tube (23); a transverse through hole is provided on the connector (21), one end of the through hole is inserted into the first connecting tube (23), and the exposed end of the first connecting tube (23) is fixedly connected to the traction wire (2); a longitudinal threaded hole is provided on the connector (21), and the bottom surface of the screw of the first knob (22) is pressed and contacted with the outer circumference of the first connecting tube (23) through the threaded hole; and the end of the connector (21) away from the traction wire (2) is connected to the slip ring (4).

3. The detachable snare according to claim 2, characterized in that: The through hole at one end of the connector (21) away from the traction wire (2) is inserted into the second connecting tube (24); a longitudinal threaded hole is also provided on the connector (21), and the bottom surface of the screw of the second knob (25) is pressed and contacted with the outer circumference of the second connecting tube (24) through the threaded hole; the rear end of the second connecting tube (24) is connected to the slip ring (4).

4. The detachable snare according to claim 3, characterized in that: A joint (26) is provided in the inner cavity of the slip ring (4), and the joint (26) is slidably connected to the slide groove of the slide rod (5); the upper end of the joint (26) is threadedly connected to the electrode (6), and the top of the electrode (6) extends out of the slip ring (4); and the lower end of the joint (26) is fixedly connected to the second connecting pipe (24).

5. The detachable snare according to claim 1, characterized in that: The detachable part of the quick-connect plug (10) comprises an outer sheath (11) and a plug-in pin (13), and the locking part comprises a locking sleeve (12) and a positioning tube (18); one end of the outer sheath (11) is connected to the slide rod (5), and a plug-in hole is provided at the center of the other end, and a locking sleeve (12) is provided in the plug-in hole; an annular groove (14) is provided on the circumferential surface of the inner end of the locking sleeve (12); the plug-in pin (13) with an elastic structure radially extends into the outer sheath (11) and is clamped on the annular groove (14); the locking sleeve ( The inner holes of the locking sleeve (12) and the protective sleeve (3) are respectively provided with internal threaded holes, and the two ends of the positioning tube (18) are respectively connected with the internal threads of the locking sleeve (12) and the protective sleeve (3); a plurality of axial opening grooves are provided at the end of the positioning tube (18) located in the inner cavity of the locking sleeve (12), and a conical necking structure is provided at the end of the positioning tube (18); a conical surface is provided at the inner circumference of the through hole of the locking sleeve (12) and at a depth greater than the internal thread, and the conical surface of the end of the positioning tube (18) cooperates with the conical surface of the locking sleeve (12).

6. The detachable snare according to claim 5, characterized in that: The upper end of the outer circumference of the outer sheath tube (11) is provided with a threaded platform (19), the threaded platform (19) is threadedly connected to the nut (15), and the plug-in pin (13) and the threaded platform (19) are coaxially matched; a limit platform is provided on the plug-in pin (13), and a spring (16) inside the threaded platform (19) is coaxially matched to the outer circumference of the plug-in pin (13), with one end supported on the limit platform of the plug-in pin (13) and the other end supported on the inner end surface of the nut; the upper end of the plug-in pin (13) extends out of the nut (15) and is connected to the plug-in button (17).