Loop angle-adjustable electric loop snare

Abstract

The utility model discloses a convenient to adjust the electric snare of snaring angle belongs to medical instrument technical field, including core stem, the slippable ring of being arranged on the core stem, the end cap of being installed in the front end of core stem, with the electrode connection of being arranged on the snaring silk of ring and the snaring of snaring silk front end connection, its characterized in that: end cap rotatable relative to core stem, the rotatory core is installed in end cap, and the rotatory core is slidable along the axial direction of end cap, and end cap can drive the rotatory core rotation when rotating relative to core stem, and snaring silk fixedly penetrates the rotatory core, and the front end of end cap is connected with the outer tube of being set up in the outside of snaring silk, and snaring silk and electrode electric connection. The utility model discloses a convenient to adjust the electric snare of snaring angle, when adjusting snaring angle, electrode has not rotated, thereby prevent the high frequency host computer connecting line of being connected with electrode from winding on core stem, will not affect the subsequent operation of medical staff, greatly improved the use experience of medical staff.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular, to an electric snare device that facilitates adjustment of the snare angle. Background Technology

[0002] An electric snare is a medical device used in conjunction with an endoscope. It is mainly used to remove lesions such as polyps and early tumors in the digestive, respiratory, or urinary tracts using high-frequency current. It typically consists of a cannula, snare wire, handle, and cable. Its core function is to use high-frequency current to precisely remove lesions. It is suitable for endoscopic surgery of the digestive, respiratory, or urinary tracts.

[0003] The rear end of the snare wire in the electric snare device is connected to the handle, while the front end is connected to a snare used to remove diseased tissue via high-frequency current. Electrodes electrically connected to the snare wire are also mounted on the handle. When medical personnel operate the slip ring on the handle to open the snare, the angle of the snare usually needs to be adjusted to ensure it fits onto the diseased tissue. In current operation, medical personnel need to rotate the entire handle to rotate the snare wire and the front snare together. However, when the handle rotates, the electrodes also rotate, causing the high-frequency host connection wire connected to the electrodes to rotate as well. This can lead to the connection wire becoming entangled in the handle, thus hindering normal operation of the handle. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the above-mentioned defects in the prior art, an electric snare device that makes it convenient for medical staff to adjust the angle of the snare is provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an electric snare device that facilitates adjustment of the snare angle, including a core rod, a slip ring slidably disposed on the core rod, an end cap installed at the front end of the core rod, a snare wire connected to an electrode disposed on the slip ring, and a snare connected to the front end of the snare wire. The end cap is rotatable relative to the core rod, and a rotating core is installed inside the end cap. The rotating core is slidable along the axial direction of the end cap. When the end cap rotates relative to the core rod, it can drive the rotating core to rotate. The snare wire is fixedly inserted through the rotating core. An outer tube sleeved outside the snare wire is connected to the front end of the end cap. The snare wire is electrically connected to the electrode.

[0006] Furthermore, the end cap has an axially oriented guide groove inside, and the outer wall of the rotating core has an axially oriented guide bar. The guide bar and the guide groove cooperate with each other, and the guide bar and the guide groove are slidably connected.

[0007] Furthermore, a filler is fixedly connected to the inner wall of the end cap, and a through hole is provided in the center of the filler along the axial direction. The through hole is slidably connected to the rotating core, and the guide groove is formed by the radial outward recess of the hole wall of the through hole.

[0008] Furthermore, the filler is provided with multiple weight-reduction grooves.

[0009] Furthermore, a fixing core is fixedly installed inside the end cap, the loop wire can slide through the fixing core, and the front end of the rotating core can abut against the rear end of the fixing core.

[0010] Furthermore, a fixing tube is fixedly connected to the inner front end of the end cap along the axial direction of the end cap, and the fixing core is fixedly connected to the inner rear end of the fixing tube.

[0011] Furthermore, the inner diameter of the fixing tube is larger than the diameter of the front end of the end cap, the connection between the end cap and the fixing tube forms a supporting plane, a sleeve is installed inside the fixing tube, the front end of the sleeve abuts against the supporting plane, the rear end of the sleeve abuts against the front end of the fixing core, and the rear end of the outer tube is inserted into the sleeve and fixedly connected to the sleeve.

[0012] Furthermore, a connecting sleeve is fixedly connected to the front end of the core rod, and a retaining ring is circumferentially protruding on the outer circumferential surface of the connecting sleeve. An annular retaining groove is formed on the inner wall of the rear end of the end cap, and the retaining ring is fitted into the retaining groove.

[0013] Furthermore, a notch is provided on the side wall of the connecting sleeve, a sliding groove is provided on the core rod along the axial direction, and a limit block is provided on the slip ring, the limit block being slidably connected to the sliding groove.

[0014] Furthermore, a booster tube is fixedly installed on the outside of the loop wire. The front end of the booster tube is fixedly connected to the rotating core, and the rear end of the booster tube is connected to the electrode. The booster tube can rotate relative to the electrode, and sliding the slip ring can drive the booster tube to move.

[0015] The beneficial effects of this utility model are: the electric snare device of this utility model, which is easy to adjust the snare angle, can be used by simply rotating the end cap at the front end of the core rod. The electrode connected to the slip ring does not rotate, thereby preventing the high-frequency host connection wire connected to the electrode from getting tangled on the core rod. This will not affect the subsequent operation of medical staff and greatly improve the user experience of medical staff. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a perspective view of the electric snare device of this utility model, which facilitates the adjustment of the snare angle;

[0018] Figure 2 yes Figure 1 An exploded view of an electric snare device that allows for easy adjustment of the snare angle is shown.

[0019] Figure 3 yes Figure 2 A three-dimensional view of the cap at the middle of the electric snare, which facilitates adjustment of the snare angle;

[0020] Figure 4 yes Figure 2 A three-dimensional view of the rotating core in an electric snare device that facilitates adjustment of the snare angle is shown.

[0021] Figure 5 yes Figure 1 A top view of an electric snare device for easy adjustment of the snare angle is shown.

[0022] Figure 6 yes Figure 5 The image shows a cross-sectional view along AA of an electric snare device that facilitates adjustment of the snare angle.

[0023] Figure 7 yes Figure 6 A magnified view of point B in the electric snare device shown, which facilitates adjustment of the snare angle.

[0024] Figure 8 This is a schematic diagram of the connection structure between the electrode and the booster tube in this embodiment.

[0025] In the diagram: 1. Core rod, 11. Connecting sleeve, 111. Snap ring, 112. Notch, 12. Slide groove, 13. Finger sleeve, 2. Slip ring, 21. First slip ring, 22. Second slip ring, 23. Protrusion, 210. Finger ring, 3. End cap, 31. Guide groove, 32. Filler, 321. Through hole, 322. Weight reduction groove, 33. Fixing tube, 34. Fixing core, 35. Supporting plane, 36. Sleeve, 37. Snap groove, 4. Rotating core, 41. Guide bar, 5. Ring thread, 51. Push tube, 511. Limiting flange, 6. Ring, 7. Outer tube, 8. Electrode. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] Please see Figures 1-8This utility model provides an electric snare device that facilitates adjustment of the snare angle, including a core rod 1, a slip ring 2, an end cap 3, a rotating core 4, a snare wire 5, and a snare 6. The slip ring 2 is slidably mounted on the core rod 1 along the axial direction. The end cap 3 is rotatably coaxially mounted on the front end of the core rod 1. The rotating core 4 is slidably embedded in the end cap 3 and is slidable along the axial direction of the end cap 3. When the end cap 3 rotates relative to the core rod 1, it can drive the rotating core 4 to rotate. The snare wire 5 passes forward through the rotating core 4 and is fixedly connected to the rotating core 4. The front end of the end cap 3 is connected to an outer tube 7 that is sleeved outside the snare wire 5. The snare 6 is fixedly connected to the front end of the snare wire 5. An electrode 8 is also fixedly mounted on the slip ring 2. The rear end of the snare wire 5 is connected to the electrode 8, and the electrode 8 is electrically connected to the snare wire 5.

[0028] This utility model discloses an electric snare device with easily adjustable snare angle. In its initial state, the snare 6 is retracted within the front end of the outer tube 7. During use, the snare 6 enters the body cavity along the outer tube 7 and reaches the location of the diseased tissue. At this point, the medical staff slides the slip ring 2 forward along the axial direction of the core rod 1, thereby moving the snare wire 5, which in turn moves the rotating core 4 along with the snare 6 forward, causing the snare 6 to extend from the front end of the outer tube 7 and expand into a ring structure. The medical staff then fixes the core rod 1 and rotates the end cap 3 at the front end, thereby causing the internal rotating core 4 to rotate synchronously, which in turn rotates the snare wire 5. Finally, the power is transmitted to the snare 6 through the snare wire 5, causing the snare 6 to rotate and thus be placed on the diseased tissue. At this time, the high-frequency host connected to the electrode 8 is activated, causing the diseased tissue to be removed under the action of high-frequency current.

[0029] During the operation of the aforementioned adjustment ring 6, it can be achieved simply by rotating the end cap 3 at the front end of the core rod 1. The electrode 8 connected to the slip ring 2 does not rotate, thus preventing the high-frequency host connection wire connected to the electrode 8 from getting tangled on the core rod 1. This will not affect the subsequent operation of medical staff and greatly improve the user experience of medical staff.

[0030] The end cap 3 is a sleeve-shaped structure with both ends open. A guide groove 31 is provided inside the end cap 3 along its axial direction. The rotating core 4 is a tubular structure with both ends open. A guide bar 41 protrudes axially from the outer wall of the rotating core 4. The guide bar 41 and the guide groove 31 cooperate with each other and are slidably connected. By providing the cooperating guide bar 41 and guide groove 31, the rotating core 4 can only move axially relative to the end cap 3, but cannot rotate relative to the end cap 3, thus achieving a slidable locking connection between the end cap 3 and the rotating core 4. In this embodiment, there are four guide grooves 31 evenly distributed along the circumference of the end cap 3, and there are also four guide bars 41, with each guide bar 41 corresponding to a guide groove 31.

[0031] Please see Figure 3In a preferred embodiment, a filler 32 is fixedly connected to the inner wall of the end cap 3. A through hole 321 is axially formed at the center of the filler 32, and the through hole 321 is slidably connected to the rotating core 4. A guide groove 31 is formed by a radially outward recess in the wall of the through hole 321. Furthermore, multiple weight-reducing grooves 322 are formed on the filler 32 to reduce weight and achieve lightweight production. In this embodiment, the end cap 3 and the filler 32 are integrally formed.

[0032] Please see Figure 7 In this embodiment, a fixing tube 33 is fixedly connected to the front end of the end cap 3 along the axial direction of the end cap 3. The fixing tube 33 is open at both ends, and a fixing core 34 is fixedly connected to the rear end of the fixing tube 33. The fixing core 34 is open at both ends, and the loop wire 5 slidably passes through the fixing core 34. The front end of the rotating core 4 can abut against the rear end of the fixing core 34. In use, medical staff push the slip ring 2 forward, thereby driving the rotating core 4 to move forward synchronously until it abuts against the rear end of the fixing core 34. At this time, the rotating core 4 is in position, and at the same time, the loop 6 at the front end of the loop wire 5 is exposed from the front end of the outer tube 7 and is in an open state. By setting the fixing core 34 to limit the movement distance of the rotating core 4, the operation of medical staff is greatly facilitated and efficiency is improved. Furthermore, in this embodiment, the fixing core 34 and the fixing tube 33 are fixedly connected by an interference fit.

[0033] Furthermore, the inner diameter of the fixing tube 33 is larger than the diameter of the front end of the end cap 3, so that a bearing surface 35 is formed at the connection between the end cap 3 and the fixing tube 33. A sleeve 36 is installed inside the fixing tube 33. The front end of the sleeve 36 abuts against the bearing surface 35, and the rear end of the sleeve 36 abuts against the front end of the fixing core 34, thereby restricting the sleeve 36 from moving axially along the end cap 3. The rear end of the outer tube 7 is inserted into the sleeve 36 and fixedly connected to the sleeve 36. In this way, a fixed connection relationship is achieved between the outer tube 7 and the end cap 3. The outer tube 7 is made of plastic tubing so that it can be adapted to be inserted into the human body cavity.

[0034] Please see Figure 2 The front end of the core rod 1 is fixedly connected to a connecting sleeve 11, and the end cap 3 is rotatably sleeved on the outside of the connecting sleeve 11. Specifically, a retaining ring 111 is circumferentially protruding on the outer circumferential surface of the connecting sleeve 11, and an annular retaining groove 37 is circumferentially recessed on the inner wall of the rear end of the end cap 3. The retaining ring 111 is fitted into the retaining groove 37. Through the connection relationship between the retaining ring 111 and the retaining groove 37, it can be ensured that the two can rotate relative to each other, while also preventing the two from easily separating.

[0035] Furthermore, the connecting sleeve 11 is made of plastic material and can deform under external force. A notch 112 is provided on the side wall of the connecting sleeve 11. The notch 112 reduces the structural strength of the connecting sleeve 11, which is conducive to the deformation of the connecting sleeve 11 under external force, thereby inserting the connecting sleeve 11 into the end cap 3.

[0036] A sliding groove 12 is also provided along the axial direction on the core rod 1, and the sliding groove 12 passes through the two opposite side walls of the core rod 1. The sliding ring 2 is slidably sleeved on the core rod 1, and a limiting block is provided on the sliding ring 2. The limiting block is slidably connected to the sliding groove 12. Specifically, the sliding ring 2 includes a first sliding ring 21 and a second sliding ring 22 that hug each other. Both the first sliding ring 21 and the second sliding ring 22 have an arched structure. Each of the first sliding ring 21 and the second sliding ring 22 has a corresponding protrusion 23 connected inside. After the first sliding ring 21 and the second sliding ring 22 hug each other, the two protrusions 23 fit together to form the limiting block. In this embodiment, the first sliding ring 21 and the second sliding ring 22 are engaged and fixedly connected by a buckle and a slot.

[0037] In this embodiment, a scale line is provided along the axial direction on the outer surface of the core rod 1 to allow medical personnel to know the moving distance of the slip ring 2, thereby controlling the moving distance of the front end loop 6. In addition, finger rings 210 are provided on both the first slip ring 21 and the second slip ring 22, and a finger sleeve 13 is provided at the rear end of the core rod 1. The two finger rings 210 are used for medical personnel to insert their index and middle fingers, while the finger sleeve 13 is used for medical personnel to insert their thumb. The three fingers work together to push the slip ring 2 to slide.

[0038] Please see Figure 8Electrode 8 is mounted on the first slip ring 21, and its lower end is connected to the loop wire 5. Specifically, a fixing hole is provided at the bottom of electrode 8, and the loop wire 5 is installed in the fixing hole. In addition, a booster tube 51 is fixedly installed on the outside of the loop wire 5. The rear end of the booster tube 51 is connected to electrode 8, and the booster tube 51 is rotatable relative to electrode 8. The front end of the booster tube 51 is inserted into the rotating core 4 and fixedly connected to the rotating core 4. By setting the booster tube 51, the structural strength of the rear half of the loop wire 5 is enhanced, which is beneficial for moving the rotating core 4 when the slip ring 2 is moved. In this embodiment, the loop wire 5 is a steel cable, which allows it to bend to adapt to the human body cavity, and the booster tube 51 is a steel pipe. In use, when the end cap 3 rotates, it can drive the booster tube 51 to rotate relative to electrode 8, and when the slip ring 2 is slidable, the slip ring 2 can drive the booster tube 51 to move. In one specific embodiment, the booster tube 51 rotatably passes through the electrode 8, allowing it to rotate relative to the electrode 8 under the influence of the end cap 3. Furthermore, two radially protruding limiting flanges 511 are provided on the booster tube 51, located on opposite sides of the electrode 8 and abutting against it. This prevents the booster tube 51 from being pulled out of the electrode 8, allowing it to move synchronously when the slip ring 2 is in motion. Additionally, the front end of the booster tube 51 does not extend to the front end of the end cap 3, thus not obstructing the bending of the outer tube 7.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric snare device for easy adjustment of the snare angle, comprising a core rod, a slip ring slidably disposed on the core rod, an end cap mounted on the front end of the core rod, a snare wire connected to an electrode disposed on the slip ring, and a snare connected to the front end of the snare wire, characterized in that: The end cap is rotatable relative to the core rod, and a rotating core is installed inside the end cap. The rotating core is slidable along the axial direction of the end cap. When the end cap rotates relative to the core rod, it can drive the rotating core to rotate. The loop wire is fixedly inserted through the rotating core. The front end of the end cap is connected to an outer tube sleeved outside the loop wire. The loop wire is electrically connected to the electrode.

2. The electric snare device for easily adjusting the snare angle as described in claim 1, characterized in that: The end cap has an axially oriented guide groove inside, and a guide bar protrudes axially on the outer wall of the rotating core. The guide bar and the guide groove cooperate with each other, and the guide bar and the guide groove are slidably connected.

3. The electric snare device for facilitating adjustment of the snare angle as described in claim 2, characterized in that: A filler is fixedly connected to the inner wall of the end cap. A through hole is provided in the center of the filler along the axial direction. The through hole is slidably connected to the rotating core. The guide groove is formed by the radial outward recess of the hole wall of the through hole.

4. The electric snare device for easy adjustment of the snare angle as described in claim 3, characterized in that: The filler has multiple weight-reducing grooves.

5. The electric snare device for easily adjusting the snare angle as described in claim 1, characterized in that: A fixing core is fixedly installed inside the end cap, the loop wire slides through the fixing core, and the front end of the rotating core can abut against the rear end of the fixing core.

6. The electric snare device for facilitating adjustment of the snare angle as described in claim 5, characterized in that: A fixing tube is fixedly connected to the inner front end of the end cap along the axial direction of the end cap, and the fixing core is fixedly connected to the inner rear end of the fixing tube.

7. The electric snare device for facilitating adjustment of the snare angle as described in claim 6, characterized in that: The inner diameter of the fixing tube is larger than the diameter of the front end of the end cap. The connection between the end cap and the fixing tube forms a supporting plane. A sleeve is installed inside the fixing tube. The front end of the sleeve abuts against the supporting plane, and the rear end of the sleeve abuts against the front end of the fixing core. The rear end of the outer tube is inserted into the sleeve and fixedly connected to the sleeve.

8. The electric snare device for easy adjustment of the snare angle as described in claim 1, characterized in that: The front end of the core rod is fixedly connected to a connecting sleeve. A retaining ring is circumferentially protruding on the outer circumferential surface of the connecting sleeve. An annular retaining groove is formed on the inner wall of the rear end of the end cap along the circumferential direction. The retaining ring is fitted into the retaining groove.

9. The electric snare device for facilitating adjustment of the snare angle as described in claim 8, characterized in that: The connecting sleeve has a notch on its side wall, the core rod has a sliding groove along its axial direction, and the slip ring has a limit block that is slidably connected to the sliding groove.

10. The electric snare device for facilitating adjustment of the snare angle as described in claim 1, characterized in that: A booster tube is fixedly installed on the outside of the loop wire. The front end of the booster tube is fixedly connected to the rotating core, and the rear end of the booster tube is connected to the electrode. The booster tube can rotate relative to the electrode, and the sliding ring can drive the booster tube to move.

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