JP3902458B2 - Contamination prevention endoscope channel tube obturator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an anti-contamination method for closing a proximal end portion of a channel tube attached to an outer sheath when the outer sheath for preventing contamination attached to an insertion portion of an endoscope is detached from the insertion portion. The present invention relates to a channel tube obturator for a type endoscope.
[0002]
[Prior art]
To prevent the insertion part of the endoscope inserted into the body from being contaminated by the sewage in the body, not only to cover the insertion part of the endoscope with an outer sheath, but also to pass a fluid or a treatment instrument. It is necessary to provide a channel tube leading to the body on the outer sheath side.
[0003]
Such a channel tube is inserted and disposed in a sheath sheath that is detachably covered by the insertion portion of the endoscope, the distal end opens at the distal end portion of the sheath sheath, and the proximal end extends from the proximal end of the sheath sheath. It is arranged so as to exit, and is used in a state where it is passed through a channel guide path provided in the insertion portion (Japanese Patent Laid-Open No. 1-244732).
[0004]
[Problems to be solved by the invention]
An endoscope to which the outer sheath as described above is attached is handled so that the outer sheath is attached and detached and exchanged every time it is used, so that the sewage adhering to the outer sheath does not move to other objects.
[0005]
However, when the outer sheath is removed from the insertion section, the channel tube is removed from the channel guide path at the same time, and at that time, the sewage adhering to the channel tube pops out and the endoscope is operated. There is a risk of contaminating surrounding objects such as the head and the insertion part.
[0006]
Therefore, when removing the outer sheath, it is necessary to close the channel tube at the base end part. However, in the method of inserting a stopper or flattening and welding, the outer diameter of the channel tube at that part is required. Becomes so large that it becomes impossible to remove the channel tube from the channel guideway.
[0007]
Therefore, the present invention can reliably block the channel tube attached to the outer sheath so that the outer diameter does not increase at the proximal end portion and remove it from the endoscope channel guide path in a clean state. An object of the present invention is to provide a channel tube obturator for a contamination-preventing endoscope.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the channel tube obturator of the contamination-preventing endoscope according to the present invention is inserted into the outer sheath that is detachably covered by the insertion portion of the endoscope, and the distal end is the outer sheath. A channel tube obturator for an antifouling endoscope for closing a proximal end portion of a flexible channel tube that opens to the distal end portion of the flexible sheath and has a proximal end extending from the proximal end of the outer sheath. A female mold in which a receiving groove having a substantially semicircular cross-sectional shape along the outer periphery of the base end portion of the tube is formed, and the base end portion of the channel tube is used as a female receiving groove in a state in which all the internal space of the channel tube is closed. And a male mold having protrusions to be crushed toward the base, and the proximal end of the channel tube is heated by sandwiching the proximal end of the channel tube between the female mold and the male mold. Big It is obtained as the internal space is formed in all the welded state without Kunar.
[0009]
In addition, the cutter passage groove for allowing the cutter to pass through the channel tube sandwiched between the female die and the male die so as to cut at the site where the welding has been performed spans the female die and the male die. It may be formed.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 6 shows an example of a contamination-preventing endoscope, and a channel guide path 12 is disposed over the entire length in the axial direction in the insertion portion 11 of the flexible tubular endoscope.
[0011]
Both ends of the channel guide path 12 are open at both ends of the insertion portion 11, and a treatment instrument insertion base 14, an air / water supply tube 15, and a suction are attached to a proximal adapter 13 detachably attached to the proximal end thereof. A tube 16 or the like is connected.
[0012]
An outer sheath 20 that is detachably covered by the insertion portion 11 is formed in a cylindrical shape by, for example, thin silicon rubber, and a distal end portion thereof is closed by a transparent distal end cap 21.
[0013]
A channel tube 22 made of a heat-meltable material such as polyethylene resin or ethylene trifluoride resin is inserted in the outer sheath 20 in the axial direction over the entire length, and the tip 22a of the channel tube 22 is The distal end cap 21 opens to the outside, and the proximal end portion 22 b extends rearward from the proximal end of the outer sheath 20.
[0014]
In the channel tube 22 of this embodiment, as shown in a cross-sectional shape in FIG. 7, a plurality of pipe lines such as an air supply path, a water supply path, and a suction path (also a treatment instrument insertion path) are independently formed. It is a multi-lumen tube.
[0015]
In the contamination-preventing endoscope configured as described above, when the outer sheath 20 is covered with the insertion portion 11 at the time of preparation for use, the channel tube 22 is passed through the channel guide path 12 at the same time. The end portion is used in a state connected to the proximal adapter 13.
[0016]
When the endoscopy is completed, the outer tube sheath 20 is removed from the insertion portion 11 and the channel tube 22 is removed from the insertion portion 11 at the same time. Therefore, the proximal end portion 22b of the channel tube 22 is blocked at the exposed placement portion A. Disconnect.
[0017]
FIG. 1 shows a channel tube closing tool used for closing and cutting the base end portion 22b of such a channel tube 22, and a female mold 1 made of a metal such as iron or stainless steel having good thermal conductivity. It is constituted by a male mold 3.
[0018]
As shown in FIG. 2, the female die 1 is formed with a receiving groove 2 having a substantially semicircular cross-sectional shape having a size substantially along the outer periphery of the base end portion 22 b of the channel tube 22. The mold 3 is formed with a protrusion 4 that crushes the base end portion 22 b of the channel tube 22 toward the receiving groove 2 of the female mold 1.
[0019]
As shown in FIG. 3, the protrusion 4 of the male mold 3 is formed in a semicircular shape with a smooth tip, and when the channel tube 22 is pressed against the receiving groove 2 and crushed, It is formed in a shape and dimension in which the internal space is closed.
[0020]
Therefore, before the channel tube 22 is removed from the channel guide path 12, the proximal end portion of the channel tube 22 is between the female mold 1 and the male mold 3 heated to a temperature that melts the channel tube 22. By sandwiching 22b, the base end portion 22b of the channel tube 22 is heated and melted in the state shown in FIG. 3, and the entire inner space is welded and closed without increasing the outer diameter. The
[0021]
Further, as shown in FIG. 1, the female mold 1 and the male mold 3 are used for passing a blade so that the channel tube 22 sandwiched between both molds 1 and 3 is cut at the welded portion. A blade passage groove 5 is formed across both molds 1 and 3.
[0022]
Therefore, after the base end portion 22b of the channel tube 22 is welded and closed, as shown in FIG. 3, the channel tube 22 is cut at the welded portion through the razor blade 9 or the like in the blade passage groove 5, thereby forming the channel. The tube 22 can be extracted from the channel guide path 12 in a state where the internal spill does not leak out.
[0023]
The present invention is not limited to the above-described embodiment. For example, as shown in FIGS. 4 and 5, the channel tube 22 may be a simple single-lumen tube. The channel tube 22 may be removed from the channel guide path 12 without cutting the base end portion 22b.
[0024]
【The invention's effect】
According to the present invention, the base end portion of the channel tube in a state in which the receiving groove having a substantially semicircular cross-sectional shape along the outer periphery of the base end portion of the channel tube is formed, and all the internal spaces of the channel tube are closed. The outer diameter of the base end portion of the channel tube is increased by sandwiching and heating the base end portion of the channel tube with the male die having a projection formed to crush the tube toward the female receiving groove. Since the inner space is completely welded, the channel tube attached to the outer sheath is securely closed so that the outer diameter does not increase at the proximal end portion. It can be removed from the guideway in a clean state.
[Brief description of the drawings]
FIG. 1 is a perspective view of a channel tube obturator of a contamination-preventing endoscope according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a state in which a multi-lumen channel tube is set in the channel tube obturator of the contamination-preventing endoscope according to the embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a state in which a multi-lumen channel tube is crushed by the channel tube obturator of the contamination-preventing endoscope according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view of a state in which a single lumen channel tube is set in a channel tube obturator of a contamination-preventing endoscope according to another embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a state where a single lumen channel tube is crushed by a channel tube obturator of a contamination-preventing endoscope according to another embodiment of the present invention.
FIG. 6 is a perspective view of an insertion portion of the contamination-preventing endoscope according to the embodiment of the present invention.
FIG. 7 is a cross-sectional view of a multi-lumen channel tube according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Female type | mold 2 Reception groove | channel 3 Male type | mold 4 Protrusion 5 Blade passing groove | channel 11 Insertion part 12 Channel guide way 20 Outer sheath 22 Channel tube 22b Base end part

Claims (2)

Flexible that is inserted and arranged in a sheath sheath that is detachably covered by the insertion portion of the endoscope, the distal end opens at the distal end portion of the sheath sheath, and the proximal end extends from the proximal end of the sheath sheath An anti-contamination endoscope channel tube obturator for occluding the proximal end portion of the channel tube,
A female mold in which a receiving groove having a substantially semicircular cross-sectional shape along the outer periphery of the base end portion of the channel tube is formed, and the base end portion of the channel tube is placed in the state in which all the internal spaces of the channel tube are closed. The channel tube is provided with a male mold formed with a projection that crushes toward the receiving groove of the mold, and the base end portion of the channel tube is sandwiched between the female mold and the male mold and heated. A channel tube obturator for a pollution-preventing endoscope, characterized in that the base end portion of the anti-contamination endoscope is molded so that the inner space is entirely welded without increasing the outer diameter. A knife passage groove for allowing the cutter to pass through the channel tube sandwiched between the female mold and the male mold so as to cut the channel tube at a position where the welding has been performed is provided in the female mold and the male mold. The channel tube obturator for a contamination-preventing endoscope according to claim 1, wherein the channel tube obturator is formed over a mold.

Images