CN106983539B

CN106983539B - Medical rotatable snare

Info

Publication number: CN106983539B
Application number: CN201710316688.8A
Authority: CN
Inventors: 双建军; 沈正华; 李常青
Original assignee: Micro Tech Nanjing Co Ltd
Current assignee: Micro Tech Nanjing Co Ltd
Priority date: 2017-05-08
Filing date: 2017-05-08
Publication date: 2020-05-19
Anticipated expiration: 2037-05-08
Also published as: CN106983539A

Abstract

The invention provides a medical rotatable snare which comprises a loop, a pull rope and a boosting tube, wherein the loop, the pull rope and the boosting tube are sequentially connected, a knob is sleeved outside the boosting tube, and the knob rotates to drive the boosting tube to rotate. The booster comprises a booster pipe gear, wherein the booster pipe is fixedly arranged at the center of the booster pipe gear, and a knob drives the booster pipe to rotate through gear transmission. An inner gear is arranged in the knob, a transmission gear is arranged between the inner gear and the boosting pipe gear, the knob drives the inner gear to sequentially drive the transmission gear and the boosting pipe gear and then drive the boosting pipe to rotate, and the boosting pipe drives the ferrule to rotate through the inhaul cable. The boosting pipe is externally provided with an outer pipe, the pipe wall of the outer pipe at the near end is provided with an outer pipe groove matched with the transmission gear, the transmission gear is positioned at the outer pipe groove, and the transmission gear is meshed with the boosting pipe gear inwards and is meshed with the inner gear outwards.

Description

Medical rotatable snare

Technical Field

The invention relates to the field of medical equipment, in particular to a medical rotatable snare.

Background

Snare, widely used in cutting and snatch and retrieve polyp sample and foreign matter, the product can be used in people or animal's laparoscopic examination, only need just can work through a little opening, excision of alimentary canal polyp commonly used, just through scope clamping track, entangle the polyp with snare earlier, tighten up, then will rest on the flesh excision, generally adopt the high frequency electricity during the cutting, it peels off out to rest on the flesh tissue, the polyp tissue of excision is retrieved to the reuse string bag, also can use snare directly to entangle the polyp and take out the body along with the scope together.

In the working process of the snare, the snare can conveniently penetrate through an endoscope channel, most products can achieve the purpose at present, when a target polyp tissue is sleeved by the snare, the snare is close to the polyp tissue firstly, then the loop stretches out of the pipeline and stretches, then the polyp is slowly sleeved, the snare cannot rotate, and the polyp is difficult to take out under some conditions.

Disclosure of Invention

The purpose of the invention is as follows: the technical problem to be solved by the invention is to provide a medical rotatable snare aiming at the defects of the prior art.

In order to solve the technical problem, the invention provides a medical rotatable snare which comprises a loop, a pull rope and a boosting tube which are sequentially connected, wherein a knob is sleeved outside the boosting tube, and the knob rotates to drive the boosting tube to rotate.

The invention comprises a boosting pipe gear, wherein a boosting pipe is fixedly arranged at the center of the boosting pipe gear, and a knob drives the boosting pipe to rotate through gear transmission.

According to the invention, an inner gear is arranged in the knob, a transmission gear is arranged between the inner gear and a boosting pipe gear, the knob drives the inner gear to sequentially drive the transmission gear and the boosting pipe gear to drive the boosting pipe to rotate, and the boosting pipe drives the ferrule to rotate through the inhaul cable.

According to the invention, the outer tube is arranged outside the boosting tube, the outer tube groove matched with the transmission gear is arranged on the tube wall of the outer tube at the near end, the transmission gear is positioned at the outer tube groove, and the transmission gear is meshed with the tube pushing gear inwards and meshed with the inner gear outwards.

In the invention, a gear seat is arranged outside the boosting pipe gear and used for limiting the boosting pipe gear.

In the invention, more than one groove is arranged on the inner ring of the knob, more than one bulge matched with the groove is arranged on the outer ring of the internal gear, and the bulge on the internal gear is inserted into the groove on the knob.

According to the invention, the near end of the boosting tube is connected with the core rod, the slide block is arranged outside the core rod, the far end of the slide block is connected with the conveying belt, the outer tube is arranged on the outer ring of the pull rope, the outer tube is connected with the conveying belt, the slide block moves towards the far end, the boosting tube drives the pull rope and the ferrule to move towards the far end, and the slide block simultaneously drives the outer tube to move towards the near end through the.

In the invention, an electrode base is arranged in the sliding block, an electrode joint and a spring which are electrically connected are arranged on the electrode base, and the lower end of the spring is electrically connected to the boosting tube.

According to the invention, the outer tube is provided with an outer tube fixing tube, and the outer tube fixing tube is connected to the conveyor belt.

In the invention, the boosting pipe is matched with the boosting pipe gear, and the boosting pipe gear rotates to drive the boosting pipe to rotate.

Has the advantages that: according to the invention, the rotatable knob is additionally arranged on the handle, when the knob is rotated, the knob rotates to drive the pull cable to rotate, and the pull cable drives the ferrule or other instruments to rotate together, so that the ferrule can rotate together with the knob, thereby achieving the purpose of adjusting the direction of the ferrule.

Drawings

The foregoing and other advantages of the invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a front view of the snare;

FIG. 3 is a schematic view of the interior of the knob;

FIG. 4 is a schematic view of a drive belt;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a schematic view of an electrode connection portion;

fig. 7 is a partially enlarged view of fig. 6.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

Example (b):

as shown in fig. 1-3, the device comprises a core rod 1, a slide block 2, a knob 3, a boosting tube 4, a handle sleeve 5, an outer tube 6, a ferrule 7, an inner gear 13, a transmission gear 14 and a boosting tube gear 15, wherein the inner gear 13 is arranged in the knob, the boosting tube gear 15 is arranged on the outer ring of the boosting tube 4, the transmission gear 14 is arranged between the inner gear 13 and the boosting tube gear 15, the knob drives the inner gear 13 to sequentially drive the transmission gear 14 and the boosting tube gear 15 and then drive the boosting tube to rotate, and the boosting tube drives the ferrule 7 to rotate.

The outer tube 6 is arranged outside the boosting tube, the outer tube groove 19 matched with the transmission gear is arranged on the tube wall of the outer tube at the near end, the transmission gear is positioned at the outer tube groove, and the transmission gear is meshed with the pushing tube gear 15 inwards and meshed with the inner gear 13 outwards.

A gear seat 20 is arranged outside the boosting pipe gear 15 and used for limiting the boosting pipe gear 15.

The inner ring of the knob 3 is provided with more than one groove 21, the outer ring of the internal gear 13 is provided with more than one bulge 22 matched with the groove, and the bulge on the internal gear 13 is inserted into the groove on the knob 3.

As shown in fig. 4 and 5, the device comprises a transmission belt fixing block 9, a transmission belt 10, an outer tube fixing tube 11 and a guy cable 12, wherein the transmission belt fixing block 9 and the outer tube fixing tube 11 fix the transmission belt on a sliding block and an outer tube, the near end of a boosting tube is connected with a core rod 1, a sliding block 2 is arranged outside the core rod, the far end of the sliding block is connected to the transmission belt, the outer tube is arranged on the guy cable 12, the outer tube is connected to the transmission belt, the sliding block moves towards the far end, the boosting tube drives a ferrule to move towards the far end, the;

as shown in fig. 4, specifically, the core rod is fixed, the slide block 2 moves downward to drive the push rod 4 downward, the slide block simultaneously drives the conveyor belt to move counterclockwise, and the conveyor belt drives the outer pipe sleeve and the outer pipe to move upward together, so as to realize a forward-backward movement, so that the effect of increasing the movement distance is achieved, that is, the movement distance of the final workpiece is 2 times of the movement distance of the slide block, and the release cable 12 is accelerated.

As shown in fig. 6 and 7, the booster includes an electrode connector 16, a spring 17 and an electrode base 18, the electrode base 18 is arranged in the slide block, the electrode connector 16 and the spring 17 are electrically connected to the electrode base 18, and the lower end of the spring 17 is electrically connected to the booster tube.

The implementation mode is as follows:

after the ferrule 7 is manufactured, the ferrule is riveted or laser welded with the stay cable 12 through a connecting pipe, the stay cable is composed of a plurality of strands of alloy steel wires or a single strand of nickel-titanium wires, and the material has strong toughness and rigidity and can drive a working part to rotate. The pull rope penetrates through the outer pipe 6 and is fixed with the boosting pipe 4 at the near end, the boosting pipe 4 and the knob 3 are on the same axis, the boosting pipe 4 and the knob 3 are fixed together in the longitudinal direction and move together in the longitudinal direction, the knob 3 drives the boosting pipe 4 to rotate in the axial direction, the knob internally comprises an inner gear 13, a boosting pipe gear 15 is welded on the boosting pipe, the gear can be made of metal or plastic materials, optionally, the boosting pipe can be round or square or in other special shapes, so that the gear can drive the boosting pipe to rotate, a transmission gear 14 is arranged between the boosting pipe gear 15 and the inner gear 13, the main function is to fill a gap between the inner boosting pipe gear 15 and the inner gear 13, after the assembly is completed, the knob is rotated to drive the boosting pipe to rotate, the working part is driven to rotate to adjust the direction, and the operation is convenient.

The knob is assembled on the sliding block, the knob can rotate around the axial direction of the sliding block and can move back and forth along with the sliding block, and the sliding block moves back and forth to drive the knob to move back and forth as the boosting tube is synchronous with the knob in the longitudinal direction, so that the knob drives the boosting tube to move back and forth to release and recover the ferrule.

An electrode joint 16 connected with high-frequency electricity is arranged on the sliding block, a through hole is formed in a base 18 of the electrode joint, the boosting tube penetrates through the through hole, a spring 17 is arranged in the electrode seat and pressed on the boosting tube, and the reliable electric connection between the electrode and the boosting tube is guaranteed by the pressure of the spring.

There is a conveyer belt 10 at the distal end of handle, the slider extends partly forward, and be connected with the conveyer belt 10 outside, the conveyer belt opposite side, it is together fixed with the conveyer belt with the outer tube through outer tube fixed tube 10, like this, when propelling movement slider, the slider makes the work piece forward motion in propelling movement boosting pipe, slider propelling movement conveyer belt rotation simultaneously, the conveyer belt drives the opposite direction motion of outer tube to the slider, like this, just, it is anti-, the distance that makes the apparatus stretch out has increased one time than the distance that the handle slider moved, the motion of handle impels the motion of working part to enlarge 2 times, it becomes possible to make the apparatus that original long stroke needs both hands to operate become one-hand operation.

The booster tube of the present invention may be used in a six-way configuration, or in other configurations, and is not limited to a cylindrical configuration.

The using method comprises the following steps:

the loop product used by the handle of the invention reaches the position of the polyp tissue through the forceps channel of the endoscope, then the loop is opened by moving the slide block on the handle, the direction is adjusted by rotating the knob, then the tissue is taken or grabbed, after the tissue is well sleeved, the slide block is slowly withdrawn, the loop is slowly furled, thus the tissue can be sleeved, and then the polyp tissue is cut off by electrifying.

The working part provided by the embodiment is a medical snare, and can also be a medical apparatus requiring long stroke and rotation, such as a stone-taking net basket, a foreign body net bag and the like.

While the present invention provides a medical snare, and many methods and ways of practicing the same, the above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make modifications and refinements without departing from the principle of the present invention, and these modifications and refinements should be regarded as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.

Claims

1. A medical rotatable snare comprises a loop (7), a pull cable (12) and a boosting tube (4) which are sequentially connected, and is characterized in that the boosting tube is externally sleeved with a knob (3), and the knob (3) rotates to drive the boosting tube (4) to rotate;

the near end of the boosting tube is connected with a core rod (1), a sliding block (2) is arranged outside the core rod, the far end of the sliding block is connected to a conveying belt, an outer tube is arranged on the outer ring of the inhaul cable (12), the outer tube is connected to the conveying belt, the sliding block moves towards the far end, the boosting tube drives the inhaul cable and the ferrule to move towards the far end, and the sliding block simultaneously drives the outer tube to move towards the near end through the conveying belt.

2. A medical rotatable snare according to claim 1, comprising a push-tube gear (15), wherein the push-tube (4) is fixedly arranged at the center of the push-tube gear (15), and the knob (3) drives the push-tube (4) to rotate through gear transmission.

3. A medical rotatable snare according to claim 2, wherein an internal gear (13) is arranged in the knob, a transmission gear (14) is arranged between the internal gear (13) and the boost tube gear (15), the knob drives the internal gear (13), the transmission gear (14) and the boost tube gear (15) are sequentially driven to drive the boost tube to rotate, and the boost tube drives the loop (7) to rotate through the inhaul cable (12).

4. A medical rotatable snare according to claim 3, wherein an outer tube (6) is arranged outside the push-assist tube, an outer tube groove (19) adapted to the transmission gear is formed in the wall of the outer tube at the near end, the transmission gear is located at the outer tube groove, and the transmission gear is meshed with the push tube gear (15) inwards and is meshed with the inner gear (13) outwards.

5. A medical rotatable snare according to claim 3, wherein a gear holder (20) is provided outside the push tube gear (15) for holding the push tube gear (15).

6. A medical rotatable snare according to claim 3, wherein the inner ring of the knob (3) is provided with more than one groove (21), the outer ring of the internal gear (13) is provided with more than one protrusion (22) which fits the groove, and the protrusion on the internal gear (13) is inserted into the groove on the knob (3).

7. A medical rotatable snare according to claim 1, wherein an electrode base (18) is provided in the slide block, an electrode tab (16) and a spring (17) are provided on the electrode base (18) for electrical connection, and the lower end of the spring (17) is electrically connected to the push tube.

8. A medical rotatable snare according to claim 1, wherein an outer tube securing tube (11) is provided on the outer tube, the outer tube securing tube being connected to the conveyor belt.

9. A medical rotatable snare according to claim 1, wherein the push-on tube is fitted to a push-on tube gear (15), and the push-on tube gear (15) rotates to drive the push-on tube to rotate.