JPH048336A - Endoscope - Google Patents

Abstract

PURPOSE:To make a position easily confirmable of an endoscope insertion part in the body so as to perform endosopic inspection safely and in a short time by adding an X-ray contrast/material to a single member, formed of resin, of the built-in object provided in the interior of an outer casing member. CONSTITUTION:An insertion part 1 is constituted of a resin-made flexible pipe 2 serving as an outer casing member having three lumens 3. The resin-made flexible pipe 2 is formed of resin of polyurethane, teflon, etc., and an X-ray contrast/material of barium sulfate, tungsten, etc., is added by a fine amount. Good antithrombus and slip characters are provided by the resin-made outer casing member. Further, an X-ray contrast-making is ensured by a resin-made built-in object to which the X-ray contrast/material is added.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope that is inserted into a body cavity while performing fluoroscopic observation using X-rays.

[Prior Art] A flexible resin tube that is inserted into a body cavity while confirming its position with X-rays is disclosed in Japanese Patent Publication No. 1-40628, for example.
It is disclosed in the publication No. Such resin tubes are widely used in the medical field, for example, as catheters or drainage tubes. In order to impart X-ray contrast properties to these resin tubes, an X-ray contrast imparting substance such as barium sulfate or tungsten is added to the base resin.

However, if a large amount of the X-ray contrast-imparting substance is added to the resin, antithrombotic properties and slipperiness will be impaired, so as shown in Japanese Patent Publication No. 1-40628, A method of incorporating it into the inner layer of a product is used.

[Problems to be Solved by the Invention] However, in the resin tube as a molded product disclosed in Japanese Patent Publication No. 1-40628, the peripheral wall thereof has a layer having X-ray contrast properties and a layer having X-ray contrast properties. It must be formed into a multilayer structure with no layers.

By the way, in the case of an endoscope that is inserted into a body cavity while confirming its position with X-rays, the outer diameter of the insertion part is made as thin as possible to reduce patient pain, and in addition, an image guide fiber light is used. Internal objects such as guide fibers and channel tubes must be housed inside with as high a filling rate as possible. Therefore, if the resin tube that makes up the outer skin of the insertion tube has a multilayer structure as described above,
There is a problem that the performance of the endoscope is deteriorated because the outer diameter of the insertion portion becomes thicker or the space for storing internal organs becomes narrower.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide an endoscope that has antithrombotic properties and slipperiness without increasing the outer diameter, and has an insertion section that has X-ray contrast properties. It is about providing.

[Means and effects for solving the problems] The objects of the present invention are solved by the following means.

That is, an endoscope as a means for this purpose includes an insertion section whose peripheral surface is formed by an exterior member made of resin, and at least one of the internal objects provided inside the exterior member is made of resin. It is characterized by adding an X-ray contrast imparting substance to one member.

Therefore, antithrombotic properties and slipperiness are obtained by the resin exterior member, and X-ray contrast properties are ensured by the resin internal components to which an X-ray contrast imparting substance is added.

[Examples] Examples of the present invention will be described below with reference to the drawings.

The endoscope according to the first embodiment of the present invention includes an insertion section 1 as shown in FIG. It is made up of. Three lumens 3 as shown in Figure 2
Two of the lumens accommodate a light guide fiber 4 and an image guide fiber 6, and the remaining lumen 3 is used as a channel hole 7. The image guide fiber 6 is configured as a conduit type image guide fiber having a heterogeneous medium lens 5 fixed to its tip with an adhesive.

The light guide fiber 4 is led out from the base end of the insertion section 1 and connected to a light source device (not shown). The image guide fiber 6 is similarly led out from the base end of the insertion section 1 and connected to a TV left camera head or an eyepiece (not shown). Further, the channel hole 7 communicates with a channel opening (not shown).

The flexible tube 2 made of resin is made of resin such as polyurethane or Teflon, and
! A very small amount or no contrast-imparting substance is added, and it has good antithrombotic properties and good slipping properties. In addition, the lumen 3 formed in the flexible tube 2
The surrounding wall thickness is set to the minimum necessary thickness.

As shown in FIG. 2, the conduit type image guide fiber 6 has a conduit part 8, and a protective coating 9 is provided around the conduit part 8 to prevent the occurrence of micro racks in the conduit part 8. There is. The protective coating 9 is made of a resin material such as polyurethane or silicone, and contains the X-ray contrast-imparting substance added thereto in a larger amount than the flexible tube 2.

Therefore, when inserting the insertion section of the endoscope into a body cavity while performing fluoroscopic observation using X-rays, the protective coating 9 can be confirmed as a dark image, so you can see where the insertion section 1 is in the body cavity. can be easily confirmed.

Furthermore, by adding an X-ray contrast imparting substance to the protective coating 9, it is possible to prevent external light from entering the conduit portion 8, and to prevent deterioration of the endoscopic image transmitted by the image guide fiber 6. can.

Next, a second embodiment of the present invention will be described with reference to FIG. In this second embodiment, the same members as those in the first embodiment are given the same reference numerals, and their explanations will be omitted.

As shown in FIG. 4, a spacer 10 made of resin is disposed inside the insertion section 1 of the endoscope.
Three grooves 11 extending in the longitudinal direction are formed on the outer periphery of 0. Inside these grooves 11, there is an image guide fiber 12 having an unbalanced medium lens 5 glued to its tip;
A light guide fiber 4 and a channel tube 13 having a channel hole 7 are inserted respectively. In addition,
In this second embodiment, the image guide fiber is not provided with X-ray contrast property.

A flexible tube 14 made of, for example, a heat-shrinkable FEP tube, a polyimide resin tube, etc., which has antithrombotic properties and good sliding properties, is attached to the outer periphery of the spacer 10 in which internal organs are accommodated in the groove 11. has been done. This flexible tube 14 includes
A trace amount of an X-ray contrast imparting substance is added, or no substance is added at all.

On the other hand, the spacer 10 is made of a flexible resin such as polyurethane or Teflon, and, like the protective coating 9 in the first embodiment, the spacer 10 is doped with an X-ray contrast imparting substance in a larger amount than the flexible tube 14. ing.

Therefore, during X-ray fluoroscopy, the spacer 10 can be confirmed as a dark image, so that it is easy to confirm where the insertion section 1 of the endoscope is in the body.

Next, a third embodiment of the present invention will be described with reference to FIG. This third embodiment relates to an improvement of a balloon-equipped endoscope. The insertion section 1 of this endoscope is equipped with a flexible tube 15 made of resin, and this flexible tube 15 has three lumens 3 as in the first embodiment, and a balloon 16 is attached near the tip. Both ends 19 of the balloon 16 are adhered to the circumferential surface of the flexible tube 15 with an adhesive or the like. One of the three lumens 3 is configured as a fluid passage 17 for expanding the balloon 16. That is, a through hole 18 is provided on the side of the fluid passage 17, and this through hole 18 communicates with the fluid passage 17 and the inside of the balloon 16.

Therefore, when inflating the balloon 16, carbon dioxide gas (CO2 gas) or liquid is removed from the proximal end of the insertion portion 1 through the fluid passage 1.
7 and the through hole 18 into the balloon 16 .

On the distal end side of the fluid passage 17, a round sealing member 20 made of flexible resin is press-fitted to the vicinity of the through hole 18, or is fixed using a non-hardening adhesive. This sealing member 20 has a larger amount of X-ray contrast imparting substance added than the flexible tube 15. However, since this sealing member 20 has flexibility, the insertion portion 1 is flexible as a whole.

The flexible tube 15 of the insertion section 1 has an X
No radiographic contrast-imparting substance is added at all, or a trace amount is added.

In this third embodiment, since the sealing member 20 can be confirmed as a dark image during X-ray fluoroscopy, it is easy to confirm where the insertion section 1 of the endoscope is located inside the body.

In the first to third embodiments, whether an X-ray contrast-imparting substance is added to any one of the protective coating, the spacer 10 and the sealing member 20, or of course these members are used in combination. Also good.

[Effects of the Invention] As explained above, in the endoscope according to the present invention, at least one member made of resin among the internal organs provided inside the exterior member made of resin is provided with X-ray contrast. Since the substance imparting properties is added, it is possible to provide an endoscope having X-ray contrast properties while maintaining antithrombotic properties and slipperiness without increasing the outer diameter of the endoscope insertion portion.

Therefore, the operator can easily confirm the position of the endoscope insertion part within the body, and as a result, the operator can perform endoscopic examination safely and in a short time.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the insertion section of an endoscope according to a first embodiment of the present invention, FIG. 2 is a front view of the endoscope insertion section, and FIG.
The figure is a perspective view of an image guide, FIG. 4 is a perspective view showing the insertion section of an endoscope according to a second embodiment of the present invention, and FIG. 5 is a perspective view of an endoscope insertion section according to a third embodiment of the present invention. FIG. 1. Insertion part, 2, 14.15. Flexible tube (exterior member),
9... Protective coating, 10... Spacer, 20... Seal member. Tagani's agent Patent attorney Atsushi Tsuboi 113

Claims (1)

[Claims] In an endoscope equipped with an insertion section whose peripheral surface is formed by an exterior member made of resin, at least one of the internal objects provided inside the exterior member is made of resin.
An endoscope characterized in that an X-ray contrast imparting substance is added to two members.