JPH0717288Y2 - Insertion guide tube for endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention is an endoscope insert used to assist the insertion of the insertion portion of the endoscope into the body, for example, into the S-shaped colon. Regarding the guide tube.

[Prior Art] Various insertion guide tubes for endoscopes of this type have been devised to date (for example, Japanese Patent Publication No. 52-14032). However, since this only loosely inserts the insertion portion of the endoscope into the insertion guide tube, when inserting the insertion guide tube into the body, there is a gap between the outer periphery of the endoscope insertion section and the tip of the insertion guide tube. There was a risk that the wall of the body cavity would be caught in the gap and pinched and damaged.

As shown in FIG. 7 to FIG. 9, this phenomenon is caused by the air inside the body cavity from the gap at the same time when the insertion guide tube a is inserted into the gap between the inner peripheral surface of the insertion guide tube and the outer periphery of the endoscope insertion portion b. Through the clearance on the proximal side of the insertion guide tube a, and the body cavity wall C, which originally kept a sufficient distance with respect to the insertion guide tube a due to the expansion, contracts as shown in FIG. It happens because it approaches and is involved.

Therefore, as a means for preventing the air in the body cavity from leaking out of the body, the one disclosed in Japanese Utility Model Laid-Open No. 62-116702 has been proposed. This is to provide an elastic member in close contact with the outer circumference of the endoscope insertion portion to be inserted into the proximal end portion of the insertion guide tube so as to prevent air leakage from the gap.

By the way, it is well known that the insertion guide tube is used to smoothly insert the endoscope insertion portion into the body cavity, particularly the S-shaped colon, which is an intricately bent organ. In this case, the endoscopic examination is performed while inserting air into the intestine from the tip of the endoscope simultaneously with insertion. It is an anatomical story, but as shown in Figure 10, S
The character colon d is not fixed to the abdominal wall or the like in the body cavity.
Further, as shown in FIGS. 11 to 12, folding in an accordion shape is also possible in the axial direction. From the above, the S-shaped colon d has various forms depending on the amount of air flowing into the intestine, but the endoscope insertion part b and the insertion guide tube a can be kept in a stable state without falling out in the intestine. In the state shown in FIG. 13, the air in the S-shaped colon d is sufficiently released. In addition, as shown in FIG. 15, when air is contained in the intestine, the intestine keeps a curved shape, so that the intestine is no matter how rigid the endoscope insertion part b or the insertion guide tube a is. It loses the power of and bends or slips out. On the contrary, if it is hard, it may be dangerous because it may make a hole in the intestine.

The Japanese Utility Model Laid-Open No. 62-116702 cannot cope with each of these situations and has a serious drawback in this respect.

The present invention was devised with the above problems in mind, and its purpose is to improve the safety of the insertion guide tube when it is inserted and to effectively maintain the function of the insertion guide tube after insertion. It is to provide a mirror insertion guide tube.

[Means and Actions for Solving the Problem] The present invention provides an elastic member that is deformed inwardly and closely attached to and detached from the outer peripheral surface of an endoscope insertion portion inserted into the tube body of the insertion guide tube. It is provided so that the gap between the insertion guide tube and the endoscope insertion portion can be opened and closed as needed.

Then, when the insertion guide tube is inserted, the elastic member is pressed all around to prevent air in the intestine from leaking, thereby preventing entrapment of the intestinal wall. Further, after the insertion, the pressing of the elastic member is released to allow the air in the intestine to fully escape into the body to prevent the insertion guide tube from coming off.

[Embodiment] FIGS. 1 to 3 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 is an endoscope, and the endoscope 1 includes an insertion portion 2 and an operation portion 3. The insertion section 2 is formed by sequentially connecting the flexible tube 4, the bending tube 5 and the tip section 6 from the proximal side, and the bending tube 5 is remotely bent by operating an angle knob 7 provided on the operation section 3. It is like this.

An insertion guide tube 8 is attached to the insertion section 2 of the endoscope 1. The insertion guide tube 8 is composed of a relatively long tube body 9 and a proximal portion 10 provided at the proximal end on the proximal side. The tube body 9 is made of a tube material having appropriate flexibility such that the tube body 9 does not lose the drag force of the body cavity wall when inserted into the body cavity, for example, porous polyfluoroethylene, polyurethane or the like. Further, the inner diameter of the tube body 9 is slightly larger than the outer diameter of the insertion portion 2 of the endoscope 1, and in the meanwhile, there is no hindrance to the insertion / removal of the insertion portion 2 even after being inserted into the body cavity of the tube body 9. A moderate gap 11 is formed over its entire length.

The hand portion 10 is made of a hollow elastic member having a substantially tubular shape as shown in FIGS. The minimum inner diameter is endoscope 1
Is larger than the insertion part 2 of. It should be noted that this hand portion 10 need not be hollow as long as it is a flexible material. The proximal portion 10 is usually formed with an inner diameter that is the same as or slightly larger than the outer diameter of the inserted portion 2 that is inserted as shown in FIG. 2, and forms a gap 11b.

Therefore, when used, the insertion guide tube 8 is attached to the insertion portion 2 of the endoscope 1 before being inserted into the body cavity, and the insertion guide tube 8 is further inserted as shown by the dotted line in FIG. Evacuate to the side of 2. In this state, only the insertion part 2 of the endoscope 1 is inserted into the body cavity. After this, when inserting the insertion part 2 deeply to the position shown by the solid line in FIG. 1, the tube body 9 is inserted into the body cavity using the insertion part 2 as a guide.

At this time, one hand holds the insertion portion 2 of the endoscope 1 so as not to come out of the body cavity, and the other hand holds the proximal portion 10 made of the elastic member as shown in FIG. When gripping as shown in FIG. 3, the inner peripheral surface of the proximal portion 10 is gripped so as to be in close contact with the outer peripheral surface of the insertion portion 2 over the entire circumference to eliminate the gap 11b. Then, the insertion guide tube 8 is prevented while preventing air from leaking from the hand portion 10.
Push forward. When reaching the desired position, release the hand holding the hand portion 10. As a result, the air in the body cavity flows out.

In this way, when the insertion guide tube 8 is inserted, it can be inserted while the inside of the body cavity is swollen, so that it can be safely used without pinching the body wall at the tip. Further, since the air can flow out of the body after the insertion, the insertion guide tube 8 cannot be pulled out. Furthermore, since the inner surface of the insertion guide tube 8 has few irregularities, the cleaning performance is high. Moreover, the number of parts is small, and the configuration can be simplified.

FIG. 4 shows a second embodiment of the present invention. A substantially tubular valve portion 12 made of an elastic material is provided in the vicinity of the proximal side of the insertion guide tube 8 or at the extreme proximal end thereof.
An air supply bulb 14 is connected to the valve portion 12 from one place via a tube 13. The air balloon 14 is equipped with a pressure release valve 15.
When inserting the insertion guide tube 8 into the body cavity, the valve portion 12 is inflated by the air blower 15 and brought into close contact with the outer peripheral surface of the insertion portion 2 of the endoscope 1, and then the insertion guide tube 8 is inserted into the body cavity. . After insertion, the pressure release valve 15 is operated to release the pressure and allow the air in the body cavity to flow.

In this configuration, since the stool 12 is inflated and deflated by the insufflation balloon 14, it is not necessary to hold the hand portion 10 at the time of insertion, which is easy.

FIG. 5 shows a third embodiment of the present invention. A mouthpiece 16 is abutted and fixed to the proximal end of the insertion guide tube 8, and a ring 18 made of an elastic body is attached to a step portion 17 on the inner peripheral surface of the mouthpiece 16.
Is fitted. On the other hand, a male screw 19 is provided on the outer peripheral portion, and a ring member 21 provided with a female screw 20 correspondingly is externally fitted to the outside of the male screw 19. The ring member 21 has a pressing surface 22 for pressing the ring 18 by the rotation of the ring member 21. The minimum inner diameters of the mouthpiece 16, the ring 18, and the ring member 21 are substantially the same as the inner diameter of the insertion guide tube 8. When the insertion guide tube 8 is inserted into the body cavity, when the ring member 21 is rotated and the ring 18 is pushed, the ring 18 elastically deforms and sticks out in the inner peripheral direction, and is closely attached to the entire circumference of the insertion portion 2. After that, the insertion guide tube 8 is inserted into the body cavity.
After the insertion, when the ring member 21 is rotated to release the restriction on the ring 18, the contact between the ring 18 and the insertion portion 2 is released, and the air in the body cavity is discharged. Deform the ring 18 to the ring member
Since it can be held by screwing in 21 (even if you release your hand), opening and closing operation is reliable.

FIG. 6 shows a fourth embodiment of the present invention. A mouthpiece 23 is abutted and fixed to an end portion of the insertion guide tube 8 on the proximal side, and a valve member 25 made of an elastic body is fitted to a step portion 24 of an inner peripheral surface thereof. On the other hand, a male screw 26 is provided on the outer periphery of the mouthpiece 23, and a ring member 28, which is provided with a female screw 27 correspondingly, is externally fitted on the outer side of the male screw 26. The ring member 28 has a pressing surface 30 for expanding the flange portion 29 of the valve member 25 by the rotation of the ring member 28. The inner diameter of the collar portion 29 of the valve member 25 in the natural state is smaller than the outer diameter of the insertion portion 2 of the endoscope 1, and when the insertion portion 2 is inserted, the entire circumference is sufficiently adhered and the insertion portion 2 It does not hinder the axial movement of the. After inserting the insertion guide tube 8 into the body cavity,
When the ring member 28 is rotated and the collar portion 29 is spread out, the contact between the collar portion 29 and the insertion portion 2 is released, and the air in the body cavity flows out. According to this structure, since the collar portion 29 is always in close contact with the insertion portion 2, workability equivalent to that of the conventional insertion guide tube 8 can be obtained.

[Effects of the Invention] As described above, according to the present invention, when the insertion guide tube is inserted, it is possible to prevent the outflow of air in the body cavity, so that the distal end portion of the insertion guide tube and the endoscope are The body wall does not easily get caught in the insertion part and can be used safely, and the air in the body cavity can be discharged by the operation at the proximal part after insertion, so that the insertion guide tube does not come off.

[Brief description of drawings]

FIG. 1 is a use state diagram of the first embodiment of the present invention, FIGS. 2 and 3 are sectional views of a hand portion of the first embodiment of the present invention, and FIG. 4 is a second view of the present invention. 5 is a sectional view of a base portion of the embodiment of FIG. 5, FIG. 5 is a sectional view of a base portion of a third embodiment of the present invention,
FIG. 6 is a sectional view of a hand portion of a fourth embodiment of the present invention,
FIGS. 9 to 10 are explanatory views of the use of the conventional example, FIG. 10 is an explanatory view of the sigmoid colon, FIGS. 11 and 12 are explanatory views of properties of the sigmoid colon, and FIGS. 13 to 15 are insertions. It is explanatory drawing of the use condition of a guide tube. 1 ... endoscope, 2 ... insertion part, 8 ... insertion guide tube, 9 ...
… Tube body, 10 …… Hand part, 12 …… Valve part, 14 …… Air balloon,
18 …… Ring, 25 …… Valve part.

Claims (1)

[Scope of utility model registration request] 1. An insertion guide tube for an endoscope having a tube body for loosely inserting and guiding an endoscope, wherein an elastic member provided on a proximal inner peripheral surface of the tube body and the elastic member A guide tube for insertion of an endoscope, comprising: a sealing means that is deformed in one direction to be brought into close contact with and separated from the outer circumference of the endoscope insertion portion.