JPH02268769A - Treating device for endoscope - Google Patents

Abstract

PURPOSE:To make it possible to insert surely and easily an apex of a tube feeding a contrast medium by providing a flexible operating member which is inserted in a flexible sheath and is brought into contact with or fixed on the sheath at an apex of the sheath and a nozzle which is set at the near end of the operating member and freely goes forward and back to the sheath. CONSTITUTION:After an apex chip 2 is pushed on a nipple 11, an operation pipe 3 is gripped and pushed and the apex chip 2 ia pushed in a tube of the gall bladder. If an injection pipe contg. a drug liq. etc., is fixed on the first cock 8, the drug liq. in the injection pipe can be transferred in the tube of the gall bladder 12 through a sheath 1 and the apex chip 2. Therefore, when an operator grips an operation pipe 3 and pushes it, its force becomes to a force pushing the apex chip 2 through an operating member 4 and when the apex chip 2 forwards, the sheath 1 fixed on the apex chip 2 is pulled in the tube of the gall bladder. Namely, as a force pushing the operation pipe 3 becomes to a force pulling the sheath, a contrast medium-injecting tube can be surely inserted in the tube of the gall bladder.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an endoscopic treatment tool, and more specifically, a contrast imaging device that is inserted into a treatment tool insertion channel of an endoscope to deliver a drug solution, a contrast medium, etc. The present invention relates to the configuration of an endoscopic treatment tool such as a tube.

[Prior Art] A contrast tube, which is one of the endoscopic treatment tools and is inserted endoscopically into a body cavity to deliver a drug solution, a contrast agent, etc., is an example of the method disclosed in the Japanese Utility Model Act published in 1983. It is disclosed in Japanese Patent No. 43442. That is, the endoscope contrast agent injection tube disclosed in Japanese Utility Model Publication No. 61-43442, as shown in FIG. The cap 7 has a first cock 8 in which a syringe barrel for liquid delivery is fitted, and a first cock 8 in which the anti-buckling wire 10 is fitted. Two cocks 9 are formed at the proximal ends, and the buckling prevention wire 10 is inserted halfway into the sheath 21 through the second cocks 9.

In order to insert the contrast agent injection tube configured in this way into a body cavity, for example, into a bile duct, it is inserted into a treatment instrument insertion channel through the forceps port of the endoscope 22, as shown in FIG. , while pressing the distal end 21a of the contrast medium injection tube protruding from the distal opening of the endoscope 22 against the duodenal papilla 11 located at the entrance of the bile duct 12, the proximal side 2 of the tube
1b is pushed in, and the distal end 21a of the tube is inserted into the bile duct 12.

[Problems to be Solved by the Invention] However, in the contrast medium injection tube that is a conventional endoscopic treatment instrument configured as described above, if the papilla 11 or the bile duct 12 is narrowed, the problem shown in FIG. Even if the contrast medium injection tube 21 is pushed in from the proximal side as shown in the figure, internal viewing is not possible! 22
The extruded tip 21a of the contrast agent injection tube becomes loose between the tube tip 21a and the papilla 11, and the force of the hand is not transmitted to the tube tip 21a, which causes the contrast agent injection tube to bend inside the duodenum and enter the bile duct 12. It may not be possible to enter.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an endoscopic treatment tool that solves the above-mentioned problems and allows the tip of a contrast agent injection tube to be inserted into the bile duct reliably and easily even if the papilla 11 or the bile duct 12 is narrowed. is to provide.

[Means and effects for solving the problems] The endoscopic treatment tool of the present invention includes a riT flexible sheath, and a tool that is inserted into the sheath and abuts or is fixed to the sheath at the distal end of the sheath. This device is characterized by having a flexible operating member and a cap that is provided at the proximal end of the operating member and is movable forward and backward with respect to the sheath.

C Embodiment] The present invention will be specifically described below with reference to the drawings. 1st
1 and 2 are a cross-sectional view and a usage state diagram of a contrast medium injection tube, which is an endoscopic treatment instrument showing a first embodiment of the present invention. In the figure, this contrast agent injection tube is made of a flexible material such as a Teflon tube, and includes a flexible sheath 1 that is inserted into a treatment instrument insertion channel located inside 51m, and a metal tip 2 fixed to the tip of the sheath 1;
The ring presser 6 is fixed to the proximal end of the sheath 1 and has a rubber O-ring inside for maintaining airtightness between the sheath 1 and the operating vibrator 3.

The sheath 1 of this contrast agent injection tube is inserted inside the sheath, and is made of a flexible metal whose distal end is fixed to the distal tip 2 and whose proximal end is fixed to a metallic operating vibrator 3. The operating member 4, which is made of a tightly wound coil, is configured to be able to freely move forward and backward in the front and rear directions. Further, this operation vibrator 3 is fixed to a cap 7 at its hand end, and
A first cock 8 into which a syringe barrel for feeding liquid is fitted is formed at the top, and a second cock 9 into which a buckling prevention wire is fitted is formed at the proximal end. 9, the buckling prevention wire 10 is inserted halfway into the sheath 1.

When the contrast medium injection tube of the first embodiment configured as described above is inserted endoscopically into a body cavity, the distal tip 2 is pressed against the nipple 11 as shown in FIG. Grip and push the vibrator 3, thereby pushing the distal tip 2 into the bile duct 12. After that, by attaching a syringe containing a drug or the like to the first cock 8, the drug in the syringe is transferred to the sheath 1. Liquid can be delivered into the bile duct 12 via the distal tip 2. Therefore, according to this first embodiment, when the operator grasps and presses the operating vibrator 3, this force becomes a force that pushes out the distal tip 2 via the operating member 4, and this causes the distal tip 2 to move forward. Then, the distal tip 2 will now pull the sheath 1 fixed to the distal tip 2 into the bile duct. In other words, the force of pushing the operating vibrator 3 on the proximal side becomes the force of pulling the sheath 1, so that the contrast agent injection tube can be reliably inserted into the bile duct.

FIG. 3 is an enlarged cross-sectional view of a main part of a contrast agent injection tube which is an endoscopic treatment instrument showing a second embodiment of the present invention. This second embodiment differs from the first embodiment in that the distal end of the operating member 4 is fixed directly to the distal end of the sheath 1 by adhesive or the like without using the distal tip, and everything else is the same. There is no difference in operation from the first embodiment.

In this second embodiment, since there is no hard part at the tip of the contrast medium injection tube, the ease of inserting the contrast medium injection tube into the treatment target area is superior to that of the first embodiment.

FIG. 4 is an enlarged sectional view of a main part of a contrast agent injection tube, which is an endoscopic treatment instrument showing a third embodiment of the present invention. This third embodiment differs from the first embodiment described above in that the operating member 4
By using a wire instead of a tightly wound coil, the tip 2 is attached to the tip of the wire 4a, and the operating vibrator 3 (
This is the same as the first embodiment except that the components (see FIG. 1) are fixed to each other, so there is no difference in operation from the first embodiment. In this third embodiment, since an operating wire is used instead of a tightly wound coil as the operating member, the area of the medicinal liquid insertion part in the sheath 1 is expanded, and this makes it possible to easily inject the medicinal liquid with a light force. become.

FIGS. 5(A) and 5(B) are sectional views of essential parts of a contrast agent injection tube, which is an endoscopic treatment instrument showing a fourth embodiment of the present invention, and FIG. 5(A) is a sectional view of the main part when the sheath is stored and FIG. 5(B) shows the sheath when the sheath is stretched to deliver liquid to the treatment target site. The fourth embodiment differs greatly from the first embodiment described above in that the sheath has a triple structure.Other than this, the fourth embodiment is the same as the first embodiment described above. Therefore, the same components as in the first embodiment are given the same numbers and their explanations will be omitted.

To explain only the difference, a first sealing material 13 made of, for example, rubber is fixed to the tip of the sheath 1 located at the outermost periphery of this contrast medium injection tube. A second sheath 16 that slides in close contact with the first sealing material 13 is inserted inside this sheath 1, and the second sheath 16 is in close contact with the first sealing material 13 on the distal end side of the second sheath 16. A first stopper 15 having an outer diameter larger than the inner diameter of the first sealing material 13 is fixed to the sliding second sealing material 14 on the proximal side. Then, a third sheath 18 that slides in close contact with the second sealing material 14 is further inserted inside this second sheath 16, and a metal tip is attached to the tip of this third sheath 18. A second stopper 17 having an outer diameter larger than the inner diameter of the second sealing material 14 is fixed to the tip 2 at its proximal end. Furthermore, inside the third sheath 18, a tightly wound coil-shaped operating member 4 is inserted, the distal tip 2 being fixed to the distal end and the operating vibrator 3 (see Fig. 1) being fixed to the proximal end. has been done. The structure other than the above is the same as that of the first embodiment. Further, the structure of the sheath is not limited to the above-mentioned three-layer structure, but a four-layer structure.
It may be a multiplex structure such as m, 5-layer, etc.

In this fourth embodiment configured in this way, when the operating member 4 is pushed as shown in FIG. 5(B), the innermost third sheath 18 protrudes, and then the middle 'Ts2 The sheath 16 is inserted into the bile duct in order from the thinner sheath 1 to the outermost sheath 1.

Therefore, according to the fourth embodiment, since the thin sheaths are sequentially inserted into the bile duct, even the thick sheaths can be easily and reliably inserted into the bile duct.

Incidentally, in each of the above embodiments, the operating member 4 is fixed to the distal end of the flexible sheath 1 directly or via the distal tip 2, but the present invention is not limited to this. That is, the operating member 4 is configured to be able to be inserted into the distal end of the flexible sheath 1, and the flexibility of the sheath 1 is normally used to bring the distal end of the contrast agent injection tube close to the treatment target area. If the target area is narrowed, etc.
Of course, the distal end of the sheath 1 may be brought closer to the treatment target site by pushing in the proximal end of the operating member while bringing the operating member into contact with the distal end of the sheath.

[Effects of the Invention] As described above, according to the present invention, when the operating vibrator is pressed on the hand side, the force becomes a force that pushes the distal tip via the operating member, so the distal tip advances. The distal tip will pull the sheath attached to the distal tip into the body cavity.

In other words, since the force of pushing the operating vibrator becomes the force of pulling the sheath, a remarkable effect is achieved in that the endoscopic treatment tool can be reliably inserted into a desired body cavity.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an endoscopic treatment instrument according to a first embodiment of the present invention, and FIG. 2 is a usage diagram showing a state in which the treatment instrument shown in FIG. 1 is inserted into a treatment site in a body cavity. , FIG. 3 is an enlarged sectional view of main parts of an endoscopic treatment instrument showing a second embodiment of the present invention, and FIG. 4 is a main part of an endoscopic treatment instrument showing a third embodiment of the present invention. FIGS. 5(A) and 5(B) are enlarged sectional views of essential parts of an endoscopic treatment tool showing a fourth embodiment of the present invention;
5(B) is a cross-sectional view showing the sheath in a retracted state, and FIG. 5(B) is a sectional view showing the sheath in a stretched state for delivering liquid to the treatment target area. FIG. 6 is a conventional endoscopic treatment instrument. FIG. 7 is a sectional view showing an example of the method of use, showing a state in which the treatment instrument shown in FIG. 6 is inserted into a treatment site in a body cavity. 1.21 Flexible sheath

Claims (1)

[Claims] (1) A flexible sheath, a flexible operating member inserted into the sheath and abutting or fixed to the sheath at the distal end of the sheath, and a flexible operating member provided at the proximal end of the operating member. An endoscopic treatment instrument comprising: a cap that can freely move forward and backward with respect to the sheath;