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A medical rotatable snare

A snare and knob technology, applied in the field of medical equipment, can solve the problems of inability to rotate, difficult to remove polyps, etc., and achieve the effect of being beneficial to operation, convenient for retrieving and cutting and recovering foreign bodies

Active Publication Date: 2020-05-19
MICRO TECH (NANJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the working process of the snare, the snare should be able to pass through the endoscopic forceps very conveniently. At present, most products can already do this. The loop stretches out of the duct and spreads out, then slowly entraps the polyp, but cannot rotate, and in some cases, it is difficult to remove the polyp

Method used

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  • A medical rotatable snare
  • A medical rotatable snare
  • A medical rotatable snare

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Such as Figure 1-3 , including core rod 1, slider 2, knob 3, booster tube 4, handle cover 5, outer tube 6, ferrule 7, internal gear 13, transmission gear 14 and booster tube gear 15, the knob is provided with an inner Gear 13, the outer ring of the booster tube 4 is provided with a booster tube gear 15, and a transmission gear 14 is arranged between the internal gear 13 and the booster tube gear 15, and the knob drives the internal gear 13, which in turn drives the transmission gear 14, the booster tube gear After 15, the booster tube is driven to rotate, and the booster tube drives the ferrule 7 to rotate.

[0027] An outer tube 6 is arranged outside the booster tube, and an outer tube groove 19 adapted to the transmission gear is arranged on the tube wall of the near-end outer tube. Engage the ring gear 13 outward.

[0028] The booster tube gear 15 is provided with a gear seat 20 for limiting the position of the booster tube gear 15 .

[0029] The inner ring of th...

Embodiment approach

[0034] After the ferrule 7 is made, it is connected with the cable 12 by riveting or laser welding. The cable is made of multi-strand alloy steel wire or single-strand nickel-titanium wire. This material has strong toughness and rigidity and can drive the working parts to rotate. . The pull cable passes through the outer tube 6 and is fixed with the booster tube 4 at the proximal end. The booster tube 4 and the knob 3 are on the same axis. The booster tube 4 and the knob 3 are fixed together in the longitudinal direction and move together in the longitudinal direction. The knob 3 drives the booster tube 4 to rotate axially. The knob contains an internal gear 13, and a booster tube gear 15 is welded on the booster tube. The material of the gear can be metal or plastic. Optionally, the booster tube It can be circular, square or other special-shaped, so as to ensure that the gear can drive the booster tube to rotate. There is also a transmission gear 14 between the booster tube g...

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PUM

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Abstract

The invention provides a medical rotatable snare device. The snare device comprises a ferrule, an inhaul cable and a booster pipe which are sequentially connected, a rotary knob sleeves the booster pipe, and the rotation of the booster pipe is driven by the rotation of the rotary knob. The snare comprises a booster pipe gear, the booster pipe is fixedly arranged in the center of the booster pipe gear, and the rotation of the booster pipe is driven by the rotary knob through a gearing transmission. An inner gear is arranged inside the rotary knob, a transmission gear is arranged between the inner gear and the booster pipe gear, the rotary knob drives the inner gear, which in turn drives the transmission gear and the booster pipe gear, then drives the booster pipe to rotate, and the booster pipe drives the ferrule to rotate through the inhaul cable. An outer pipe is arranged outside the booster pipe, an outer pipe groove adapted to the transmission gear is arranged on the pipe wall of a near-end outer pipe, the transmission gear is located on the groove of the outer pipe, the transmission gear meshes inwards with the booster pipe gear and meshes outwards with the inner gear.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a medical rotatable snare. Background technique [0002] The snare is widely used in cutting, grabbing and recovering polyp specimens and foreign bodies. The product can be used in human or animal laparoscopy, and it only needs to work through a small opening. It is commonly used for the removal of polyps in the digestive tract. , that is, through the endoscopic forceps channel, first use a snare to trap the polyp, tighten it, and then remove the polyp. During cutting, high-frequency electricity is generally used to peel off the polyp tissue, and then use a net bag to recover the excised polyp tissue. Use the snare to snare the polyp directly out of the body along with the endoscope. [0003] During the working process of the snare, the snare should be able to pass through the endoscopic forceps very conveniently. At present, most products can already do this. The loop stretche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/3205A61B10/02
CPCA61B10/02A61B17/32056
Inventor 双建军沈正华李常青
Owner MICRO TECH (NANJING) CO LTD