JPH10137261A - P0lypect0my appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent remaining of uncut blood vessels in a polyp by projecting wires from the steels in flexible plastic tubes by sliding of a ring handle part to press the projecting part of an auxiliary part to the front end of the groove of a holder body and projecting only the wire from the one steel, thereby forming a D shape. SOLUTION: When the ring handle part 12 is slid, the front ends of the wires 3, 4 are projected from the steels in the flexible plastic tubes 5, 6 and the projecting part of the auxiliary part 13 comes into contact with the holder body 11. When the ring handle part 12 is further slid, the auxiliary part 13 parts from the ring handle part 12 and the wire 3 is further extended to an arc shape by the steel fixed to the ring handle part 12, by which the front ends of the wires 3, 4 from the steels are made to form the D shape. The polyp is then put into the cautery electrode part of the D shape. When the ring handle part 12 is pulled toward the operator in an energized state, the wire rope 3 is pulled and the cautery electrode part is formed to a straight form. The polyp is thus cauterized and cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrosurgical polypectomy instrument.

[0002]

2. Description of the Related Art As a conventional electrosurgical polypectomy instrument, Japanese Patent Application Publication No. 2-291850 (Japanese Patent Application No. 2-1167) discloses a loop type electrode polypectomy snare structure. As shown, a second flexible plastic tube is disposed within a first flexible plastic tube, and an electrical connection is made to each lumen of the first flexible plastic tube and the second flexible plastic tube. In order to extend the conductor and form a loop, an insulative spacer device is attached to the tip of the electric conductor, and the device comprises a device capable of operating the conductor.

[0003]

In a conventional electrosurgical polypectomy instrument, since the electric wire is connected to an insulating spacer device for forming a loop, the loop-shaped electric wire is inserted into the tube. Even if it is inserted, a gap is created between the two electric wires. For this reason, at the time of polypectomy,
The blood vessels in the polyp will remain cut. Further, if a large number of polyps are cut using two electric wires in succession, the two electric wires are twisted and cannot be used. Therefore, the present invention enables the ablation electrode section to be formed in a D-shape,
An object of the present invention is to provide a polypectomy instrument which can be used continuously without causing a blood vessel in the polyp to remain uncut during polypectomy and without twisting of two electric wires.

[0004]

A polypectomy instrument according to the present invention is a polypectomy instrument using an electric bipolar device incorporated in an endoscope, comprising: a tube portion accommodating a cauterizing electrode portion forming a D-shape; and a holder portion. The tube section is composed of two flexible plastic tubes built in a flexible plastic outer tube, and a steel stranded wire is passed through each of the two flexible plastic tubes. The tip of the steel stranded wire goes out of the tip of the flexible plastic tube and the flexible plastic outer tube, and is fixed via an insulator. Then, the holder is attached to the holder body by two stainless steel pipes. The finger insertion part is slidably fitted to the holder body, the finger insertion part sandwiches the auxiliary part, and the auxiliary part is slidably fitted to the holder main body and provided on the auxiliary part. The raised portion is slidably fitted in the groove provided in the holder body, and the other ends of the two steel strands penetrate through two stainless steel pipes built in the holder body, and one of the stainless steel pipes The other end is fixed to the wall of the finger insertion part, one of the steel strands is connected to the tip of the coiled coated conductor, and the other end of the other stainless steel pipe makes the wall of the finger insertion part slidable. Penetrate and fix to the wall of the auxiliary part, the other steel stranded wire is connected to the cord connected to the electrode side connector, and the other end of the coil-shaped covered conductor is fixed to the wall of the auxiliary part and When connecting to the cord connected to the connector and sliding the finger insertion part, since the auxiliary part also accompanies, the wires from both steels in the flexible plastic tube protrude, and further slide the finger insertion part , Auxiliary parts Since the auxiliary portion stops when the portion comes into contact with the tip of the groove in the holder body, only one of the steel strands protrudes to form a D-shape and the two steel strands form a D-shape. It becomes a cautery electrode part of a mold.

[0005] With respect to the two flexible plastic tubes contained in the flexible plastic outer tube, the length of the tip of one flexible plastic tube is made substantially the same as the tip of the flexible plastic outer tube; The length of the tip of the other flexible plastic tube may be slightly shorter than the tip of the flexible plastic outer tube.
It is preferred to form a mold cautery electrode section.

The present polyp resection instrument is inserted into a forceps hole of an endoscope, a human finger and a middle finger are inserted into a finger insertion portion of a holder portion, and the finger insertion portion is moved in the direction of the distal end. Along with the auxiliary portion sandwiched between the insertion portions, both steel stranded wires in the two flexible plastic tubes project from the tips of the flexible plastic tubes. Further, when the finger insertion portion is moved in the direction of the tip, the projection of the auxiliary portion sandwiched between the finger insertion portions comes into contact with the tip of the groove of the holder portion, and the projection of the auxiliary portion is formed in the groove of the holder body. Since the auxiliary part comes into contact with the tip and stops, the auxiliary part moves away from the finger insertion, only the finger insertion part moves, and the steel wire fixed to the finger insertion part further protrudes, and the two The tip of the steel strand forms a D-shape.
It becomes a cautery electrode part of the type. So D at the base of the polyp
When the mold cautery electrode part is hung and the finger insertion part is returned, the steel strand is pinched by the polyp, cauterized, and cut off. Then, in order to remove a plurality of polyps one after another, it is only necessary to repeat moving the finger insertion portion toward the distal end and returning the finger insertion portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a tube portion accommodating an ablation electrode portion. Flexible plastic tubes 5 and 6 are built in.
The steel strand 3 is passed through the flexible plastic tube 5, the steel strand 4 is passed through the flexible plastic tube 6, and the ends of the steel strands 3 and 4 are fixed via the insulator 7. The steel strands 3 and 4 may be made of stainless steel,
The steel strands 3 and 4 may be wires. Flexible plastic tube 5 containing a steel stranded wire 3 in an arc shape
Is about the same length as the tip of the flexible plastic outer tube 2, and the length of the tip of the flexible plastic tube 6 is slightly shorter than the tip of the flexible plastic outer tube 2.

Reference numeral 10 denotes a holder, which is a steel strand 3, 4
The other end of the stainless steel pipe 15 penetrates through two stainless steel pipes 15 and 16 built in the holder body 11, and the other end of one stainless steel pipe 15 is fixed to the wall surface 12a of the finger insertion portion 12. Steel strand 3 penetrating inside 15
Is connected to the tip of the coil-shaped covered conductor 19, and the other end of the coil-shaped covered conductor 19 is connected to a cord 25 connected to the electrode-side connector 20. The other stainless steel pipe 16
Is slidably penetrated through the wall surface 12a of the finger insertion portion 12, is fixed to the wall surface 13a of the auxiliary portion 13, and the steel stranded wire 4 penetrating through the stainless steel pipe 16 is connected to the electrode side connector 20. Connect to cord 26. Then, as shown in FIG. 3, the protrusion 14 provided on the auxiliary portion 13 slides in the groove 17 provided on the holder body 11.

[0009] Then, as shown in FIG.
When the finger insertion portion 12 fitted to 1 slides, the tips of the steel strands 3 and 4 in the flexible plastic tubes 5 and 6 protrude. Then, the projection 14 of the auxiliary portion 13 contacts the groove 17 of the holder body 11. Further, as shown in FIG.
When the finger insertion portion 12 is slid, the protrusion 1
4 contacts the groove 17 of the holder main body 11, the auxiliary part 13 is separated from the finger insertion part 12, and the steel strand 3 fixed to the finger insertion part 12 further extends to form an arc, and the steel strand is formed. The tips of 3 and 4 form a D-type, and when energized, form a D-type cautery electrode section 9. Then, when the holly is inserted into the D-type cautery electrode section 9 and the finger insertion section 12 is pulled toward the user while the power is being supplied, the state shown in FIG. 4 is obtained. Once it is in shape, pinch, cauterize and cut the polyp. When the finger insertion portion 12 is repeatedly slid to the tip, the state shown in FIG. 5 is obtained. When the polyp is inserted into the D-type cautery electrode portion 9 and the finger insertion portion 12 is pulled forward, the state shown in FIG. , The polyp is cut, and by repeating this, a large number of polyps can be cut.

[0010]

As described above, when the present invention is used, the two steel strands serving as the cauterizing electrode portions are not twisted. Therefore, forming and twisting the two steel strands into a D-shape or returning them to a straight line can be repeated dozens of times, so that a large number of polyps can be cut off one after another. In addition, the operation can be performed very easily because all operations can be performed with the two fingers of the index finger and the middle finger. Then, among the D-shaped steel strands, the elasticity of the arc-shaped (bow-shaped) steel strand is also utilized to instantaneously and powerfully straighten the D-shaped steel strand. There are no gaps between the steel strands and no veins in the polyps remain. Furthermore, since the ablation electrode portion is formed in a D-shape, it is easy to apply even a large polyp, and the shape of the ablation electrode portion does not collapse even when a high-frequency current is applied. Of course, to prevent necrosis from reaching deep into the tissue,
The risk of intestinal perforation is reduced. In addition, it is possible to prevent the surrounding wall tissue at the connection portion of the polyp tip from being burned, and to reduce the heat damage to the polyp surrounding tissue. Furthermore, although the polypectomy device is intended for one-time use to prevent infection by the device, the present invention provides an inexpensive polypectomy device because it can be manufactured very inexpensively.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present polyp removing device.

FIG. 2 is a partially enlarged view of a tube section accommodating an ablation electrode section according to one embodiment of the present invention.

FIG. 3 is a rear view of the holder according to the embodiment of the present invention.

FIG. 4 is a front view of the cautery electrode unit according to one embodiment of the present invention when the cautery electrode unit is in a straight line.

FIG. 5 is a front view of the cautery electrode unit according to one embodiment of the present invention when the cautery electrode unit is D-shaped.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tube part which accommodated the cauterization electrode part 2 ... Flexible plastic outer tube 3,4 ... Stranded wire 5,6 ... Flexible plastic tube 7 ... Insulator 9 ... Cauterization electrode part 15, 16 · · · stainless steel pipe 10 · · · holder part 17 · · · groove of the holder body 11 · · · holder body 19 · · · coiled coated lead wire 12 · · · finger insertion part 25 26 ··· Code 13 ··· Auxiliary part 14 ··· Projection of auxiliary part

Claims (2)

[Claims] 1. An electric bipolar polyp resection device incorporated in an endoscope, wherein a tube portion accommodating an ablation electrode portion forming a D-shape is connected to a holder portion, and the tube portion is flexible. Two flexible plastic tubes are built into the flexible plastic outer tube, and a steel stranded wire is passed through each of the two flexible plastic tubes. It goes out from the tip of the flexible plastic outer tube and is fixed via an insulator.
Two stainless steel pipes are built in the holder body, the finger insertion part is slidably fitted to the holder body, the finger insertion part sandwiches the auxiliary part, and the auxiliary part is slidably fitted to the holder body. , The protrusion provided on the auxiliary portion is slidably fitted into the groove provided on the holder body, and the other ends of the two steel strands penetrate through two stainless steel pipes built in the holder body, The other end of one stainless steel pipe is fixed to the wall of the finger insertion part, and one steel stranded wire is connected to the tip of the coiled coated conductor, and the other end of the other stainless steel pipe is the finger insertion part Slidably penetrates the wall of the auxiliary part, and is fixed to the wall of the auxiliary part. Similarly, the other steel stranded wire is connected to the cord connected to the electrode-side connector. Connect to the electrode side connector while fixing to And connected to the cord, and the Slide your finger insertion section, the auxiliary section may protrude the line from both steel of said flexible plastic in the tube so entrained,
When the finger insertion portion is further slid, the protrusion of the auxiliary portion comes into contact with the tip of the groove of the holder body, and the auxiliary portion stops. Therefore, only one of the steel strands protrudes and the two steel strands become D.
A polypectomy device characterized in that when a mold is formed and energized, the steel strands become D-shaped cautery electrodes. 2. The flexible plastic outer tube according to claim 1, wherein the length of one flexible plastic tube is equal to the length of the flexible plastic outer tube. 2. The polypectomy instrument of claim 1, wherein the length of the other flexible plastic tube is approximately the same, and the length of the distal end of the other flexible plastic tube is slightly shorter than the distal end of the flexible plastic outer tube.