JP3605162B2 - Endoscope treatment instrument tube - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a tube for an endoscope treatment tool that is used by being inserted into a treatment tool insertion channel of an endoscope and having a distal end portion protruding outward from a distal end of the endoscope.
[0002]
[Prior art]
A flexible synthetic resin tube is used for various treatment tools of the endoscope, and is used by being inserted into a treatment tool insertion channel of the endoscope. Conventionally, such a tube has been used by simply cutting, for example, a fluororesin tube or the like.
[0003]
[Problems to be solved by the invention]
In many cases, a treatment tool raising table for arbitrarily changing the protruding direction of the treatment tool is arranged at the treatment tool outlet at the distal end of the endoscope. In the case of a side-view type endoscope, it is essential to provide a treatment tool raising table. Even in the case of a perspective or forward-looking type endoscope, the treatment tool raising table is often arranged. .
[0004]
When the treatment instrument tube passes through such a treatment instrument raising base portion and protrudes outward, the tube becomes in a state in which the bending habit of the distal end portion so far follows the curve of the treatment instrument raising portion. While being protruded.
[0005]
Therefore, the bending habit attached to the distal end portion of the tube has a decisive effect on the direction in which the tube protrudes, but in the conventional endoscopic treatment tube, in which direction the bending habit is formed with respect to the tube. Is not determined from the configuration of the tube.
[0006]
Therefore, the distal end of the tube has a bending tendency in different directions depending on the position, and when protruding from the distal end of the endoscope, the distal end of the tube faces an unexpected direction. Often it was not possible to induce
[0007]
Further, in the case of a high-frequency treatment instrument in which a conductive wire through which a high-frequency current flows is exposed on the outer surface of the distal end portion of the tube, the conductive wire is relatively correct for the tube protruding from the distal end of the endoscope. If it is used as it is, the bleeding accident or the like may occur due to an incorrect incision.
[0008]
FIG. 5 shows a state where the conductive wire 6 is oriented correctly with respect to the tube 1 in such a high-frequency treatment instrument, and FIG. 6 shows a state where the conductive wire 6 is oriented incorrectly with respect to the tube 1. FIG.
[0009]
Therefore, the present invention is directed to an endoscope treatment tool which has a bending habit in a predetermined predetermined direction, always projects from a distal end of an endoscope in a predetermined direction, and can be reliably and easily guided to a target site. It is intended to provide a tube.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the endoscopic treatment instrument tube of the present invention is used by being inserted into a treatment instrument insertion channel of an endoscope and having a distal end portion projecting outward from the distal end of the endoscope. In the tube for an endoscope treatment tool, the tube is formed of a flexible synthetic resin material, and a pair of stay wires are formed in a tube wall of the tube so as to be substantially 180 ° symmetric with respect to the axis of the tube. It is characterized by being buried parallel to the axis at the position.
[0011]
Further, a conductive wire through which a high-frequency current flows may be provided on an outer surface of the distal end portion of the tube in a direction substantially perpendicular to the pair of stay wires.
[0012]
【Example】
Embodiments will be described with reference to the drawings.
Figure 1 shows a reference example of the present invention, an example of the endoscope imaging tube.
[0013]
In the figure, reference numeral 1 denotes an elongated flexible tube made of fluororesin, and a pair of stay wires 2 is provided in the tube wall so that the axis of the tube 1 is aligned with the axis of the tube 1 as shown in the sectional view of FIG. It is buried parallel to the axis at approximately 180 ° symmetrical position.
[0014]
As the stay wire 2, an elastic metal wire or a non-metal wire can be used, and either a single wire or a stranded wire can be used. Here, a single stainless steel wire is used. As the non-metallic wire, a carbon fiber wire or the like can be used.
[0015]
Since the tube 1 in which the stay wire 2 is embedded is hardly stretchable in the direction in which the stay wire 2 is embedded, the tube 1 has a bending habit only in a direction perpendicular to the direction in which the stay wire 2 is embedded. .
[0016]
As shown in FIG. 1, the stay wire 2 is embedded in the tube 1 over substantially the entire length from the base end of the tube 1. However, for easy insertion into the papilla of Vater from the inside of the duodenum, for example, a range of about 10 mm from the distal end of the tube 1 is secured without burying the stay wire 2.
[0017]
A base 3 to which a syringe or the like can be connected is connected to the proximal end side of the tube 1. Reference numeral 4 denotes a fixing ring for fixing the base end portion of the tube 1 to the base 3.
The inner diameter of the tube 1 is, for example, about 1.2 mm, the outer diameter is about 1.7 mm, and the length is about 2 m. = About 0.2 d.
[0018]
The endoscope contrast tube configured as described above is inserted into a treatment tool insertion channel of an endoscope (not shown), and a distal end portion thereof is used by projecting outward from a distal end of the endoscope.
[0019]
When the contrast tube is inserted into the treatment instrument insertion channel of the endoscope, a stylet (core metal) 5 shown by a broken line is inserted into the tube 1 on the proximal side to prevent the tube 1 from breaking. I put it from.
[0020]
The tube 1 is projected while the bending habit attached to the distal end portion follows the curve of the treatment instrument raising base portion built in the distal end portion of the endoscope. As described above, the stay wire 2 is attached to the tube 1. Is bent only in a direction perpendicular to the direction in which the tube is buried, so that the tube 1 projects toward the center of the observation screen without swaying left and right along the curve of the treatment instrument raising base.
[0021]
Figure 3 shows the actual施例of the present invention, an example of application to the endoscopic high-frequency surgical tool of the present invention.
A conductive wire 6 for passing a high-frequency current is inserted through the entire length of the tube 1, and the tip of the conductive wire 6 is fixed to the tip 7 at the tip. The conductive wire 6 is exposed on the outer surface of the tube 1 between a pair of holes 8 drilled near the distal end of the tube 1 at intervals of about 30 mm.
[0022]
Then, as shown in FIG. 4, a pair of stay wires 2 similar to the reference example are arranged at approximately 180 ° from the base end of the tube 1 to the vicinity of the exposed portion of the conductive wire on the distal end side with respect to the axis of the tube 1. It is buried in a symmetrical position parallel to the axis. However, the vicinity of the exposed portion of the conductive wire is secured without burying the stay wire 2.
[0023]
In this embodiment, the direction in which the conductive wire 6 is exposed is perpendicular to the position where the stay wire 2 is arranged. Therefore, as long as the exposed portion of the conductive wire 6 is not turned 180 ° in the opposite direction, as shown in FIG. 5, the exposed portion of the conductive wire 6 is positioned on the center line of the inner circumference of the bend attached to the tube 1. You will always be located exactly.
[0024]
Therefore, when the tube 1 of this high-frequency incision instrument is inserted into the treatment instrument insertion channel of the endoscope, the tip of the tube 1 is projected from the tip of the endoscope without swaying left and right as in the reference example. The exposed portion of the conductive wire 6 is correctly positioned on the center line of the inner circumference of the bend.
[0025]
In addition, 9 shown in FIG. 3 is a support part made of an electrically insulating material connected to the base end of the tube 1, and 10 is an electric connector attached to the base end of the conductive wire 6 and connected to a high frequency power supply. When the electrical connector 10 is moved forward and backward with respect to the support portion 9, the conductive wire 6 is pushed and pulled in the tube 1, and the conductive wire 6 swells and contracts at the exposed end portion.
[0026]
【The invention's effect】
According to the present invention, the bending habit attached to the tube is perpendicular to the stay wire by a pair of stay wires embedded in the tube wall of the flexible tube at positions substantially 180 ° symmetrical with respect to the axis of the tube in parallel with the axis. , It is possible to reliably and easily guide to the target part by always protruding in a predetermined direction from the distal end of the endoscope.
[0027]
If the conductive wire through which the high-frequency current flows is provided so as to be exposed in a direction substantially perpendicular to the pair of stay wires, the conductive wire is always located on the center line of the inner circumference of the tube bend, so that the conductive wire is correctly positioned. High-frequency incision can be performed safely by guiding in the direction.
[0028]
In addition, by embedding the stay wire in the tube wall of the tube, the stiffness of the tube is strengthened, so that the tube is less likely to buckle when inserted into the treatment instrument insertion channel of the endoscope. Is also obtained.
[Brief description of the drawings]
FIG. 1 is a plan sectional view of a reference example of the present invention.
FIG. 2 is an enlarged sectional view taken along the line II-II of a reference example of the present invention.
3 is a side cross-sectional view of the solid施例of the present invention.
4 is a plan partial sectional view of the solid施例of the present invention.
FIG. 5 is a perspective view showing a correct state of a distal end portion of the high-frequency incision instrument for an endoscope.
FIG. 6 is a perspective view showing an example of an incorrect state of a distal end portion of the high-frequency incision instrument for an endoscope.
[Explanation of symbols]
1 Tube 2 Stay wire 6 Conductive wire

Claims (2)

An endoscope treatment tool tube which is used by being inserted into a treatment instrument insertion channel of an endoscope and having a distal end portion used to project outward from the distal end of the endoscope.
The tube is formed of a flexible synthetic resin material, and a pair of stay wires are buried in the tube wall of the tube only at a position substantially 180 ° symmetric with respect to the axis of the tube in parallel with the axis. Rutotomoni, conductive wires high frequency current flows is, endoscopic procedure, wherein only been found provided exposed on the outer surface in a direction having the above-described pair of guy wires substantially perpendicular at the tip portion of the tube Fitting tube. The tube for an endoscope treatment tool according to claim 1, wherein the stay wire is not embedded in a tube wall of the tube near a portion where the conductive wire is exposed to an outer surface of the tube.

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