JP3934408B2 - Endoscope contamination prevention device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope contamination prevention apparatus that is detachably attached to an endoscope insertion portion so that the endoscope insertion portion does not directly contact sewage in the body.
[0002]
[Prior art]
In a general endoscope, a treatment instrument insertion conduit is disposed through the insertion portion. Therefore, in order to prevent the insertion portion from being contaminated with the sewage in the body, it is necessary not only to cover the outer surface of the insertion portion, but also to prevent the treatment instrument insertion conduit from being contaminated with the sewage when using the treatment instrument. There is.
[0003]
Therefore, as shown in FIG. 7, in the endoscope contamination prevention apparatus, in addition to the outer sheath 20 that is detachably covered by the endoscope insertion portion, the distal end opens at the distal end portion of the outer sheath 20. The treatment instrument insertion tube 21 is inserted into the outer sheath 20 and the outer sheath 20 is covered with the endoscope insertion portion, and at the same time, the treatment instrument insertion tube 21 is inserted into the treatment instrument insertion passage of the endoscope. It is arranged.
[0004]
[Problems to be solved by the invention]
When the endoscope contamination prevention apparatus configured as described above is attached to the endoscope insertion portion, as shown in FIG. 8, in parallel with the operation in which the outer sheath 20 covers the insertion portion 11, The treatment instrument insertion tube 21 is inserted into the treatment instrument insertion conduit 12 of the endoscope.
[0005]
However, if the advancement of the treatment instrument insertion tube 21 is deteriorated due to frictional resistance or hooking between the endoscope and the treatment instrument insertion conduit 12 at that time, only the covering operation of the outer sheath 20 is advanced.
[0006]
Then, as shown by a broken line in FIG. 9, the outer sheath 20 extends in the axial direction and deforms or breaks, or as shown by a two-dot chain line, the treatment instrument insertion tube 21 moves the outer sheath 20 to the side. There are cases where the hips break while stretching.
[0007]
Therefore, the present invention easily and reliably performs covering of the outer sheath and insertion of the treatment instrument insertion tube in parallel with the endoscope in which the treatment instrument insertion passage is disposed through the insertion portion. It is an object of the present invention to provide an endoscope contamination prevention apparatus that can perform such operations.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the endoscope contamination prevention apparatus of the present invention has an inner diameter larger than the outer diameter of the endoscope insertion portion in which the treatment instrument insertion conduit is disposed, A flexible outer sheath that is removable to the endoscope insertion portion so as to insulate the endoscope insertion portion from the external environment, and a distal end that opens at the distal end portion of the outer sheath, and a proximal end that is an endoscope treatment A flexible treatment instrument insertion tube that passes through the instrument insertion conduit and extends from its proximal end, and the outer sheath is removed from the outer sheath so as to loosely surround the entire length of the outer sheath and engage the outer sheath at both front and rear ends. A free cylindrical body is provided with a deformation preventing cylinder that is less flexible than the outer sheath.
[0009]
The deformation prevention cylinder may be provided with a fixing means that can be fixed to and released from the outer sheath at both front and rear ends. Alternatively, when the deformation prevention cylinder moves in the proximal direction, the outer sleeve is disposed on the distal end side and the proximal end side. It may be configured such that the deformation preventing cylinder and the outer sheath do not interfere with each other in contact with the sheath and in a reverse operation.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows an endoscope contamination prevention apparatus according to a first embodiment of the present invention. An outer sheath 20 that is detachably covered by an insertion portion 11 of an endoscope, which will be described later, is a silicone rubber tube, for example. The cover tube 20a is formed in a thin cylindrical shape having an inner diameter larger than the outer diameter of the insertion portion 11 of the endoscope by a stretchable material such as.
[0011]
A distal end cap 20b formed of a transparent member is attached to the distal end of the cover cylinder 20a in a watertight manner, and a connecting ring 20c connected to the vicinity of the proximal end of the insertion portion 11 of the endoscope is disposed at the proximal end. It is attached.
[0012]
A treatment instrument insertion tube (also called a suction tube) 21 made of, for example, a flexible tetrafluoroethylene resin tube is inserted and disposed in the outer sheath 20 over the entire length.
[0013]
The distal end of the treatment instrument insertion tube 21 is connected to the distal end cap 20b so as to open to the outer surface at the distal end surface of the distal end cap 20b, and a portion near the proximal end of the treatment instrument insertion tube 21 is located in the connecting ring 20c. It passes through and extends rearward from the outer sheath 20.
[0014]
The treatment instrument insertion tube 21 is formed to have a diameter that can be inserted through the entire length of the treatment instrument insertion conduit 12 of the endoscope. If the proximal end portion 21a of the treatment instrument insertion tube 21 is formed in a tapered shape as indicated by a broken line, the insertion of the endoscope into the treatment instrument insertion conduit 12 becomes smooth.
[0015]
A deformation prevention cylinder 22 that gently surrounds the outer sheath 20 over its entire length is attached so that it can be freely covered and removed by sliding in the axial direction.
[0016]
The deformation preventing cylinder 22 is formed in a cylindrical shape that is much thicker than the cover cylinder 20a by using a material such as polyethylene, polypropylene, methacrylic resin, or vinyl chloride. Therefore, the deformation preventing cylinder 22 is much smaller in flexibility than the outer sheath 20 and hardly deforms.
[0017]
In the vicinity of both front and rear ends of the deformation prevention cylinder 22, manual fixing screws 22a are attached so as to contact the side surface of the distal end cap 20b of the outer sheath 20 and the side surface of the connecting ring 20c, and the manual fixing screw 22a is tightened. Thus, the deformation preventing cylinder 22 is fixed to the outer sheath 20 at the front and rear end positions.
[0018]
FIG. 1 shows a state in which the endoscope contamination prevention apparatus according to the present embodiment is attached to the insertion portion 11 of the endoscope 10, in a state where the manual fixing screw 22 a is tightened and the deformation prevention cylinder 22 is attached. The outer sheath 20 is slid in the axial direction so as to cover the insertion portion 11. Since the inner diameter of the cover cylinder 20a is larger than the outer diameter of the insertion portion 11, the covering operation is performed smoothly.
[0019]
Simultaneously with the operation, the proximal end portion of the treatment instrument insertion tube 21 is inserted into the treatment instrument insertion duct 12 from the distal end opening 12a of the treatment instrument insertion duct 12 that is disposed through the insertion section 11 of the endoscope 10 in the axial direction. Plug in. Therefore, the treatment instrument insertion tube 21 is inserted into the treatment instrument insertion conduit 12 as the outer sheath 20 moves.
[0020]
Then, although the advancement of the treatment instrument insertion tube 21 of the outer sheath 20 may deteriorate due to frictional resistance or catching between the treatment instrument insertion tube 12 of the endoscope 10 and the like, the deformation prevention cylinder 22 is fixed to both ends. The outer sheath 20 in the formed state is not easily deformed.
[0021]
Accordingly, the treatment instrument insertion tube 21 is forcibly pushed into the treatment instrument insertion conduit 12 only by temporarily stretching the treatment instrument insertion tube 21 inside the outer sheath 20, and the treatment instrument insertion tube 21 is forcedly inserted into the treatment instrument insertion tube 12. The outer sheath 20 is not greatly deformed or damaged.
[0022]
As shown in FIG. 3, when the outer sheath 20 is completely covered with the insertion portion 11 and the connection ring 20 c is engaged with the connection portion 14 of the endoscope 10, the base of the treatment instrument insertion tube 21 is formed. The end portion extends from the proximal end side opening 12 b of the treatment instrument insertion conduit 12.
[0023]
Therefore, as shown in FIG. 4, the proximal end portion of the treatment instrument insertion tube 21 is cut to a predetermined length, and the connection adapter 30 is attached to that portion. The connection adapter 30 of this embodiment has a configuration in which a suction base 32 to which a suction tube (not shown) is connected protrudes from the side surface of the adapter body 31 and a forceps plug 34 is attached to the outer end of the adapter body 31. It has become. Reference numeral 35 denotes a sealing O-ring.
[0024]
Then, by loosening the two manual fixing screws 22a and moving only the deformation prevention cylinder 22 to the front side, as shown in FIG. 5, the insertion portion 11 of the endoscope 10 is insulated from the external environment. It will be in the use condition to which the sheath 20 was attached.
[0025]
FIG. 6 is a reference example of the present invention. In the state where the deformation preventing cylinder 22 moves in the proximal direction without providing the manual fixing screw 22a to the deformation preventing cylinder 22, the distal end side contact portion A and the proximal end contact are shown. in contact portions B contact deformation prevention tube 22 to the distal end cap 20b and the connecting ring 20c of the mantle sheath 20 abuts, in the opposite direction of the operation in which the deformation preventing tube 22 and the mantle sheath 20 is configured so as not to interfere.
[0026]
【The invention's effect】
According to the present invention, a cylindrical body that loosely surrounds a sheath sheath in which a treatment instrument insertion tube that is passed through a treatment instrument insertion passage of an endoscope is inserted and engaged with the sheath sheath at both front and rear ends, By providing a deformation prevention cylinder that is less flexible than the outer sheath, even when the advancement of the treatment instrument insertion tube becomes poor due to frictional resistance or catching between the treatment instrument insertion tube and the endoscope, the outer sheath and Without easily deforming the treatment instrument insertion tube, it is possible to easily and reliably insert the outer sheath into the endoscope insertion portion and insert the treatment instrument insertion tube into the treatment instrument insertion tube, which is performed in parallel therewith. Can do.
[0027]
In addition, the endoscope contamination prevention apparatus of the present invention has an advantage that it can be used widely in general endoscopes in which the treatment instrument insertion conduit is disposed through the insertion portion.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a state in which the endoscope contamination prevention apparatus according to the first embodiment of the present invention is being mounted on an endoscope.
FIG. 2 is a schematic cross-sectional view of the endoscope contamination prevention apparatus according to the first embodiment of the present invention.
FIG. 3 is a schematic cross-sectional view showing a state in which the endoscope contamination prevention apparatus according to the first embodiment of the present invention is being mounted on the endoscope.
FIG. 4 is a schematic cross-sectional view showing a state immediately before the endoscope contamination prevention apparatus according to the first embodiment of the present invention is completely attached to the endoscope.
FIG. 5 is a schematic cross-sectional view showing a state in which the endoscope contamination prevention apparatus according to the first embodiment of the present invention has been attached to the endoscope.
FIG. 6 is a schematic cross-sectional view of an endoscope contamination prevention apparatus according to a reference example of the present invention.
FIG. 7 is a schematic cross-sectional view of a conventional endoscope contamination prevention apparatus.
FIG. 8 is a schematic cross-sectional view of a state in which a conventional endoscope contamination prevention apparatus is being mounted on an endoscope.
FIG. 9 is a schematic cross-sectional view of a state in which a conventional endoscope contamination prevention apparatus is being mounted on an endoscope.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Endoscope 11 Insertion part 12 Treatment instrument insertion pipe line 12a Front end opening 12b Base end side opening 20 Mantle sheath 20a Cover cylinder 21 Treatment instrument insertion tube 22 Deformation prevention cylinder 22a Manual fixing screw 30 Connection adapter

Claims (1)

The endoscope insertion portion has an inner diameter larger than the outer diameter of the endoscope insertion portion in which the treatment instrument insertion passage is disposed so as to insulate the endoscope insertion portion from the external environment. A flexible outer sheath that can be freely removed,
A flexible treatment instrument insertion tube having a distal end opened to a distal end portion of the outer sheath and a proximal end passing through the treatment instrument insertion conduit of the endoscope and extending from the proximal end;
A cylindrical body that is detachable from the outer sheath so as to loosely surround the outer sheath over its entire length and engage with the outer sheath at both front and rear ends, is provided with a deformation prevention cylinder that is less flexible than the outer sheath. ,
Near the front and rear ends of the deformation prevention cylinder, a manual fixing screw whose tip abuts against the side surface of the outer sheath is attached. By tightening the manual fixing screw, the deformation prevention cylinder is attached to the outer sheath at the front and rear end positions. An endoscope contamination prevention device characterized by being in a fixed state .

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