JP3499987B2 - Babyscope insertion tube flexible tube - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible tube for a baby scope which is used by being inserted into a treatment instrument insertion channel of a mother scope of a so-called parent-child endoscope.

[0002]

2. Description of the Related Art In order to perform endoscopic observation of the inside of a pancreaticobiliary duct of a human body, first, a thick mother scope is inserted up to the duodenum, and then a baby scope is inserted into a treatment instrument insertion channel of the mother scope.

Then, the inside of the pancreaticobiliary duct can be observed by the observation optical system of the babyscope by inserting the distal end portion of the babyscope projected from the distal end outlet of the treatment instrument insertion channel of the motherscope into the pancreaticobiliary duct or the like. it can.

Conventionally, such a flexible tube for the insertion portion of a baby scope has been formed by coating the outer surface of a spiral tube with a reticulated tube and further covering the outer surface with a flexible skin.

[0005]

However, if a spiral tube, a mesh tube, and an outer cover are formed into a three-layer structure and a necessary built-in object such as an optical fiber bundle is inserted through the structure, the outside of the flexible tube of the insertion portion is eliminated. In many cases, the diameter became large (for example, 2 mm or more), and it was not possible to insert it into the pancreaticobiliary duct as it was, and it was necessary to make an incision on the papilla of Vater, which is the entrance of the pancreaticobiliary duct.

[0006] However, not only a very high technique is required to perform such a nipple incision, but also it is necessary for the patient to incis the normal nipple without stenosis in order to examine the inner part thereof. It is not preferable from the viewpoint of health.

Therefore, there are some cases where the flexible tube of the insertion portion is formed of a simple flexible tube, but the thin-walled tube has poor followability and poor inductive property, and is easily broken at the waist so that it tends to be broken. There are drawbacks.

Therefore, according to the present invention, the outer diameter of the insertion portion into the pancreaticobiliary duct or the like can be formed to be sufficiently thin, and the sufficient followability required for the guiding operation and the strength against the waist bending and the like can be obtained. An object is to provide a flexible tube for an insertion portion of a scope.

[0009]

In order to achieve the above object, the flexible tube of the baby scope of the present invention is inserted into a treatment instrument insertion channel of a mother scope, and a distal end in which an objective optical system is incorporated. In the flexible portion insertion tube of the baby scope, the portion of which is projected from the distal end outlet of the treatment instrument insertion channel of the mother scope, the flexible insertion tube of the front side is projected from the distal end outlet of the treatment instrument insertion channel of the mother scope. , A flexible rod-shaped member is formed by a multi-lumen tube having a plurality of through-holes formed in a direction parallel to the axis, and is connected to a proximal end of the flexible tube of the front insertion portion of the mother scope. A flexible tube that is not protruded from the outlet of the distal end of the treatment instrument insertion channel is formed by covering the outer surface of the spiral tube with a reticulated tube and further covering the outer surface with a flexible skin. And wherein the door.

The outer diameter of the flexible tube of the front insertion portion may be made smaller than the outer diameter of the flexible tube of the original insertion portion, and the outer diameter of the most distal end portion of the flexible tube of the front insertion portion may be formed. May be formed to be thinner than the outer diameter of the other part of the flexible tube of the front insertion portion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a state in which the baby scope 20 is inserted through the treatment instrument insertion channel 11 of the mother scope 10.

The treatment instrument insertion channel 11 is inserted through the entire length of the insertion portion flexible tube 12 of the mother scope 10, and its inlet 14 is connected to the insertion portion flexible tube 12 and its proximal end. It is provided in the vicinity of the connecting portion with the portion 13.

Further, the distal end outlet 15 of the treatment instrument insertion channel 11 is opened laterally at the distal end portion of the insertion portion, and inside thereof is rockably operated by a remote operation from the operation portion 13. A treatment tool raising base 16 is arranged.

The insertion portion flexible tube of the baby scope 20 that is passed through the treatment instrument insertion channel 11 of the mother scope 10 is a front insertion portion flexible tube 21 that projects from the distal end outlet 15.
The proximal end of the flexible tube 22 is connected to the proximal insertion portion flexible tube 22 that remains in the treatment instrument insertion channel 11 without protruding from the distal end outlet 15.

As shown in FIG. 2, the front insertion portion flexible tube 21 has an outer diameter smaller than that of the original insertion portion flexible tube 22 and is the most distal end of the front insertion portion flexible tube 21. The portion A is formed to have a smaller outer diameter than the other portions of the front insertion portion flexible tube 21.

FIG. 3 shows the entire structure of the baby scope 20. The operation portion 23 is provided at the base end of the flexible tube 22 of the original insertion portion.
Are connected to each other, and an eyepiece portion 24 is provided so as to project from the operation portion 23.

An objective lens (not shown) of an observation optical system is built in the tip of the flexible tube 21 of the front insertion portion, and an image guide inserted through the flexible tubes 21 and 22 of the insertion portion. The observation image is transmitted to the eyepiece unit 24 via the fiber bundle. The illumination light for illuminating the subject is
The light is transmitted through a light guide fiber inserted through the flexible tubes 21 and 22.

As shown in FIG. 4, the front insertion portion flexible tube 21 has a plurality of through holes parallel to the axis line in a single rod-shaped member having elasticity and flexibility such as silicon rubber. It is formed by a so-called multi-lumen tube 21a bored in the direction.

One of the through holes is a treatment tool insertion hole 25.
The image guide fiber bundle 26 and the light guide fiber 27 are inserted through the other through holes. The tip end portion A of the flexible tube 21 on the front side is
The outer diameter of the multi-lumen tube 21a is shaved off to form a thin shape.

As shown in FIG. 5, the original insertion portion flexible tube 22 has a first spiral tube 22a formed by spirally winding a metal strip with a constant diameter, and a second spiral tube 22a wound in the opposite direction. Spiral tube 22
b is closely contacted and doubled, and the outer circumference thereof is covered with a mesh tube 22c in which metal fine wires or non-metal fine wires are braided, and further the outer circumference thereof is covered with an outer cover 22d made of a flexible synthetic resin material. Is formed. 28 is a treatment instrument insertion channel whose tip side is connected to the treatment instrument insertion hole 25 of the multi-lumen tube 21a.

In the flexible tube insertion portion flexible tube having the above-described structure, the front insertion portion flexible tube 21 protruding from the distal end outlet 15 of the treatment instrument insertion channel 11 of the mother scope 10 has a simple structure. Since it is formed by the multi-lumen tube 21a, the outer diameter can be made extremely thin (for example, less than 2 mm) and can be flexibly formed, and can be easily inserted into Ferter's papilla 100 and the like. Further, if the most distal end portion A is made thinner, it becomes easier to insert into Mr. Ferter's teat 100 and the like.

The original insertion portion flexible tube 22 that is inserted into the treatment instrument insertion channel 11 up to the vicinity of the treatment instrument raising base 16 covers the outer surfaces of the spiral tubes 22a and 22b with the mesh tube 22c. Further, since the outer surface of the flexible tube 22 is formed by coating the flexible outer layer 22d, it is thicker than the flexible tube 21 of the front insertion portion, but it has excellent followability and can sufficiently strengthen the waist. .

Therefore, when the flexible tube 22 of the original insertion portion of the baby scope 20 is twisted or pushed in at the inlet 14 side of the treatment instrument insertion channel 11 of the mother scope 10, its motion is projected from the distal end outlet 15. It is well transmitted to the flexible tube 21 of the front insertion portion and can be easily guided and inserted into the Vater of Vater 100.

[0024]

According to the present invention, the flexible tube at the front insertion portion of the baby scope, which projects from the distal end outlet of the treatment instrument insertion channel of the mother scope, has a plurality of through holes formed in the tube axial direction. By using a multi-lumen tube, the outer diameter of the baby scope can be made thin enough to be easily inserted into the pancreaticobiliary duct, etc., and the original of the baby scope that does not project from the tip exit of the treatment instrument insertion channel of the mother scope. By forming the side insertion part flexible tube by covering the outer surface of the spiral tube with a mesh tube and further by covering the outer surface with a flexible outer cover, sufficient followability necessary for guiding operation and against waist bending etc. The strength can be secured.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a state in which a baby scope according to an embodiment of the present invention is inserted into a treatment instrument insertion channel of a mother scope.

FIG. 2 is a side view of a distal end side portion of the insertion portion of the baby scope according to the embodiment of the present invention.

FIG. 3 is an overall side view of the baby scope according to the embodiment of the present invention.

FIG. 4 is a front cross-sectional view of the flexible tube at the front insertion portion of the baby scope according to the embodiment of the present invention.

FIG. 5 is a side cross-sectional view of the flexible tube of the original insertion portion of the baby scope according to the embodiment of the present invention.

[Explanation of symbols]

10 motherscope 11 Treatment tool insertion channel 15 Tip exit 20 baby scope 21 Flexible tube on front side insertion part 21a Multi-lumen tube 22 Flexible insertion tube 22a, 22b spiral tube 22c reticulated tube 22d outer skin

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-7-204159 (JP, A) JP-A-6-181879 (JP, A) Actually open 7-21003 (JP, U) Actually open 2- 114003 (JP, U) Actual flat 1-172802 (JP, U) Actual flat 2-55213 (JP, U) Actual flat 1-155401 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61B 1/00-1/32

Claims (3)

(57) [Claims] 1. A flexible tube insertion portion of a baby scope which is inserted into a treatment instrument insertion channel of a mother scope and has a distal end portion having a built-in objective optical system projected from a tip outlet of the treatment instrument insertion channel of the mother scope. In the multi-lumen, a flexible rod-shaped member is provided with a plurality of through-holes in a direction parallel to an axis. A flexible tube that is formed by a tube and that is connected to the proximal end of the distal insertion portion flexible tube and that does not protrude from the distal end outlet of the treatment instrument insertion channel of the mother scope is meshed on the outer surface of the spiral tube. A flexible tube for a baby scope, which is formed by covering a tube and further covering the outer surface thereof with a flexible skin. 2. A flexible tube for an insertion portion of a baby scope according to claim 1, wherein an outer diameter of the flexible tube of the front insertion section is formed to be smaller than an outer diameter of the flexible tube of the original insertion section. 3. The baby scope according to claim 1, wherein the outer diameter of the tip end portion of the flexible tube of the front insertion portion is smaller than the outer diameter of other portions of the flexible tube of the front insertion portion. Flexible tube for insertion part.