JPH0824214A - Treatment device insertion part of endoscope - Google Patents

Abstract

PURPOSE:To provide a treatment device insertion part capable of always smoothly and certainly drawing out a drainage tube through a forceps channel. CONSTITUTION:In the treatment device insertion part of an endoscope wherein a suction connection pipeline 17 is laterally connected to the forceps insertion passage 16 connected to the base end of a forceps channel 13 for permitting a treatment device such as a drainage tube to pass in a T- or Y-shape, the mouth end 19a of the suction connection pipeline opened to the forceps insertion passage 16 is chamfered deeply as compared with the height of the return part formed to the outer peripheral surface of the drainage tube in a protruding state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument insertion portion of an endoscope in which a drainage tube can be inserted into and removed from a forceps channel.

[0002]

2. Description of the Related Art As shown in FIG. 6, a proximal end of a forceps channel 51 in an operating portion 50 of an endoscope is inserted with forceps for guiding a treatment instrument to be inserted into and removed from the forceps channel 51. The passage 52 is connected via a channel connection pipe 53, and the suction connection conduit 54 is further connected to the forceps insertion passage 52 in a T-shape from the side.

[0003] Conventionally, the mouth 55 of such a suction connection conduit 54 opening to the forceps insertion passage 52 is 0.2 mm so as not to be an edge that damages treatment instruments passing through the forceps insertion passage 52. It was chamfered to some extent.

[0004]

When a stenosis occurs in a tubular organ in a body cavity, a tube may be left in the stenosis to secure a passage for the tubular organ. The tube for that is called a drainage tube.

In order to remove such a drainage tube left in the body cavity, it is preferable to pull it out by grasping it with a grasping forceps or the like through a forceps channel of an endoscope because the burden on the patient is small.

[0006] However, the drainage tube is formed with a "returning portion" at the outer peripheral portion which protrudes outward in a humpback manner so that the drainage tube does not naturally move from the indwelling portion with the passage of time.

Therefore, when the drainage tube is to be pulled out via the forceps channel 51, the drainage tube may be inserted into the mouth 55 of the suction connection conduit 54 opening to the forceps insertion passage 52 depending on the direction of the drainage tube. In some cases, the drainage tube could not be pulled out properly because the return section was caught.

[0008] Therefore, an object of the present invention is to provide a treatment instrument insertion portion of an endoscope which can always pull out a drainage tube via a forceps channel without being caught.

[0009]

In order to achieve the above object, the treatment instrument insertion portion of the endoscope of the present invention is provided in the operation portion at the base end of a forceps channel for passing treatment instruments such as a drainage tube. In the treatment instrument insertion portion of the endoscope in which the suction connection conduit is laterally connected to the connected forceps insertion passage in a T shape or a Y shape, the suction opening to the forceps insertion passage. It is characterized in that the mouth of the connection conduit is chamfered deeper than the height of the return portion projectingly formed on the outer peripheral surface of the drainage tube.

The chamfer depth of the mouth portion of the suction connection conduit is preferably 1 mm or more.

[0011]

Embodiments will be described with reference to the drawings. FIG. 5 shows a drainage tube 90. A silicone resin tube or a fluororesin tube is formed to have a predetermined thickness and length, and a notched portion obliquely formed on the outer peripheral surface of the tube is projected to the outside. The return portion 91 having a shape of a circle is formed. The protruding height H from the outer peripheral surface of the drainage tube 90 to the protruding end of the return portion is about 1 mm.

In FIG. 2, 1 is an operating portion of the endoscope, 2 is a flexible insertion portion, and 3 is a taper-shaped rubber fold that is attached to the base portion of the insertion portion 2. A bending portion 4 that is bendable by remote control is formed at the tip of the insertion portion 2, and a bending operation lever 5 is provided on the operation portion 1. 6 is a suction operation valve.

Between the operating portion 1 and the insertion portion 2, there is formed a connecting portion 9 which is covered by the cylindrical outer casings 7 and 8, and the forceps insertion port 10 projects into the first outer casing 7. Has been formed.

Reference numeral 11 denotes a protruding portion, and the two outer cases 7 and 8 are both made of plastic. Reference numeral 13 is a forceps channel having one end opened at the tip of the insertion portion 2 and made of, for example, a tetrafluoroethylene resin tube.

FIG. 1 shows the structure near the connecting portion 9. The proximal end portion of the forceps channel 13 is connected to a branch block 15 also shown in FIG. 4 via a channel connection pipe 14 made of stainless steel.

The branch block 15 has a forceps insertion passage 16 penetrating therethrough, which communicates straight with the one end side opening of the channel connection pipe 14. Further, the end portion of the suction connection pipe 17 connected to the tip of the suction tube 18 is connected to the forceps insertion passage 16 in a T-shape at a substantially right angle from the side. The suction tube 18 is connected to an external suction device (not shown) via the suction operation valve 6.

The suction connection pipe 17 is a branch block 15.
Is not directly connected to the branch block 15, but is connected to the branch block 15 via a metal connection seat 19. The mouth 19a of the connection seat 19 is a drainage tube 90.
The chamfer is deeper than the height H of the return portion 91, for example, 1 mm or more.

In this portion, the branch block 15 is formed by partially notching, and the connection seat 19 is fitted exactly in the notched portion. The angle formed by the chamfered portion of the mouth 19a of the connection seat 19 with respect to the axial direction of the forceps insertion passage 16 is formed so as not to exceed 45 °.

In this way, the connection seat 19 is connected to the branch block 1
Since it is provided as a separate part from 5, the mouth 19a can be largely chamfered in the front-rear direction as shown in FIG. 3 without increasing the overall size of the part.

As a result, even if the drainage tube 90 passes through this portion in any direction, the return portion 91 does not get caught in the mouth portion 19a, and the drainage tube 90 passes smoothly.

At the time of assembly, the connecting portion between the suction connection pipe 17 and the branch block 15 is a metal brazed part of the branch block 15, the channel connection pipe 14, the connection seat 19 and the suction connection pipe 17, which are brazed with silver. As shown in FIG. 4, the unit is preliminarily integrally assembled as a unit, and the unit is assembled in the first exterior case 7.

The branch block 15 includes the first outer case 7
Is arranged inside the root of the protrusion 11 formed in FIG.
As shown in FIG. 2, the both sides of the circle are cut into a flat shape to form a non-circle.

The root of the projecting portion 11 of the outer case 7 is formed in such a shape that the branch block 15 is engaged, and the branch block 15 engages with the engaging portion 20 so that it does not rotate. It is locked to the case 7.

Reference numeral 23 is a forceps insertion mouthpiece made of, for example, stainless steel, which is screwed into the branch block 15 from above and communicates straight with the forceps insertion passage 16. By screwing the forceps insertion mouthpiece 23 into the branch block 15, the branch block 15 is pulled upward and fixed in the state shown in FIG. 1. 22 is an O-ring for sealing.

The forceps insertion mouthpiece 23 is fixed to the upper end of the protrusion 11 by a nut 24. A forceps plug 30 made of rubber or synthetic resin can be detachably attached to the head 23a of the forceps insertion mouthpiece 23. Two
Reference numerals 5 and 26 are O-rings for sealing.

Reference numeral 27 is a connection frame for connecting the base end side cap 2a of the insertion section 2 and the operation section 1. The upper end of the connection frame 27 is fixed to the frame of the operation unit 1, and the lower end of the connection frame 27 is provided with a receiving plate 30 for tightening and fixing the proximal end side cap 2a of the insertion section 2 with a nut 29. It is fixed.

Through the forceps channel 13 of the endoscope thus constructed, if the drainage tube 90 left in the body cavity is grasped with grasping forceps or the like and pulled out, the return portion 91 of the drainage tube 90 is oriented in any direction. Even if there is, the drainage tube 90 can be smoothly pulled out to the outside of the forceps insertion port 10 without being caught in the mouth portion 19a of the connection seat 19 that opens to the side surface of the forceps insertion passage 16.

The present invention is not limited to the above embodiment, and for example, the suction connection conduit may be laterally connected to the forceps insertion passage in a Y shape instead of a T shape. .

[0029]

According to the present invention, since the mouth of the suction connection conduit opening to the forceps insertion passage is chamfered deeper than the height of the return portion of the drainage tube, the drainage tube can be located inside the forceps insertion passage. Even if the drainage tube is oriented like this, the drainage tube can always be pulled out smoothly through the forceps channel without the return part of the drainage tube getting caught in the mouth of the suction connection line, ensuring a reliable and safe drainage tube treatment. It can be performed.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment.

FIG. 2 is a side view of the endoscope of the embodiment.

FIG. 3 is a front view of the mouth of the suction connection line of the embodiment.

FIG. 4 is a partial side view of the embodiment.

FIG. 5 is a side sectional view of the drainage tube of the embodiment.

FIG. 6 is a vertical sectional view of a conventional example.

[Explanation of symbols]

 13 forceps channel 14 channel connection pipe 15 branch block 16 forceps insertion passageway 17 suction connection pipe 19 connection seat 19a mouth 90 drainage tube 91 return part

Claims (2)

[Claims] 1. A suction connection conduit is laterally T-shaped or Y-shaped with respect to a forceps insertion passage connected to a proximal end of a forceps channel for passing a treatment tool such as a drainage tube in an operation portion. In the treatment instrument insertion portion of the endoscope connected to, the mouth of the suction connection conduit opening to the forceps insertion passage is chamfered deeper than the height of the return portion formed on the outer peripheral surface of the drainage tube. The treatment instrument insertion portion of the endoscope characterized by the above. 2. The treatment instrument insertion portion of an endoscope according to claim 1, wherein the chamfer depth of the mouth portion of the suction connection conduit is 1 mm or more.