JPS63143024A - Catheter type fiberscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a catheter-type fiberscope.

[Conventional technology and its problems]

In general, in a catheter-type fiberscope that is inserted into a small-diameter observation tube such as a blood vessel, ureter, or fallopian tube to observe the inside of the observation tube, the diameter of the observation tube insertion object inserted into the observation tube is In addition to the light guide and the image guide, it was necessary to make the insertion body as small as possible, and to incorporate a large number of fluid tubes and the like for guiding transparent fluid and the like into the observation tube in addition to the light guide and the image guide.

However, if the diameter of the tube insertion body to be observed is made small, various fluid tubes cannot be installed inside, and if various fluid tubes are installed inside, the diameter becomes large.

Therefore, the present invention provides a catheter-type fiberscope that can reduce the diameter as much as possible and has multiple functions such as removing the contents inside the tube to be observed and injecting fluid into the tube to be observed. The purpose is to provide.

[Means for solving problems]

The catheter-type fiberscope of the present invention is a catheter-type fiberscope that is inserted into a small diameter tube to be observed such as a blood vessel, ureter, or fallopian tube to observe the inside of the tube to be observed. The sexual body has an outer diameter of at least 0.2 ff.
Image guide from +m to 0.5mm and outer diameter 20
an insertion hole into which a plurality of light guides with a diameter of from μm to 70 μm are inserted; an inflation fluid hole with an inner diameter of from 0.1 mm to 0.3 mm and which guides inflation fluid to a balloon attached to the distal end; A liquid hole having an inner diameter of 0.1 mm to 0.4 mm and introducing a transparent liquid such as physiological saline into the tube to be observed, and a liquid hole having an inner diameter of 0.1 mr to 0.3 mm and introducing carbon dioxide gas into the tube to be observed. (the gas hole, the insertion hole with an inner diameter of 0.351 m to 0.5 mm into which the laser fiber is inserted, and the inner diameter of the tube to be observed with 0.6 mm to 1.5 mm). A suction hole for suctioning and removing the contents, and a swinging hole having an inner diameter of 0.3 mm to 0.51 and into which a guide wire for changing the direction of the tip is inserted, and The observation tube insert has an outer diameter of 31 mm or less.

[Effect]

If configured as described above, the observation tube insert may have a fluid hole for introducing a fluid to inflate a balloon and temporarily stop the flow of blood, etc. within the observation tube, or inject a liquid or gas into the observation tube. Therefore, there is no need for tubes for each of these fluids, and by limiting the inner diameter of each hole, it is possible to The outer diameter of the insert can be made extremely small, 3 mm+ or less.

〔Example〕

Hereinafter, the present invention will be explained in detail based on drawings showing examples.

FIG. 2 shows a catheter-type fiberscope according to the present invention. an observed tube inserter 2 inserted into the tube 1;
A connecting portion 3 to which the proximal end portion of the insert body 2 is connected is provided.

Therefore, the tube insert 2 to be observed is made of polyvinyl chloride (PV
C) Various holes are formed in a long flexible solid body made of synthetic resin such as polyethylene (PE) or polyurethane,
Further, a balloon 4 is attached to the distal end side to temporarily stop the flow of blood, etc. within the tube to be observed 1. That is, this solid body has an insertion hole 7 into which an image guide 5 and a plurality of light guides 6 are inserted, as shown in FIG.
A transparent fluid is introduced into the balloon 4 (an inflation fluid hole 8, a transparent fluid hole 9 for physiological saline, etc., in the tube to be observed 1, and a gas hole for introducing a transparent gas such as carbon dioxide gas into the tube to be observed 1). 10, an insertion hole 12 into which a 1 mm laser fiber is inserted, a suction hole 13 for sucking impurities inside the tube to be observed 1 and removing the impurities from inside the tube to be observed 1, and a hole for changing the direction of the tip. A swing hole 15 into which a guide wire 14 is inserted is formed.

The image guide 5 is made up of an optical fiber 16 consisting of a core and a cladding, and a coating layer 17 that covers the optical fiber, and the outer diameter of the optical fiber 16 is from 0.2 nv to 0.
, up to 5 mm, and an objective lens (not shown) is connected to the tip thereof, and is connected to the insertion hole 7 of the observation tube insert 2, the connecting portion 3, and the proximal end of the connecting portion 3. It is inserted into the tube body 18.

Further, the base end of the tube body 18 is connected to an eyepiece (not shown) provided with an eyepiece.

Also, like the image guide 4, the light guide 6 is made up of an optical fiber and a coating layer, and its outer diameter is 20 μm.
to 70 μm, and is inserted through the insertion hole 7, the connecting portion 3, and the tube body 19 connected from the connecting portion 3, and the base end of the tube body 19 is connected to an illumination light (not shown). There is. Note that the distal end of the image guide 5, the objective lens, the light guide 6, etc. are fixed to the distal end of the insertion hole 7 with adhesive or the like.

Thus, the liquid hole 9 and the gas hole 10 are each connected to a tube body 20.21 connected to the base end of the connecting portion 3, and each of these tube bodies 20.21 is connected to a liquid (not shown). When the liquid and gas sources are pressurized, the respective liquids and gases flow out from the tip of the insertion section 2 through the tube body 20, 21, the liquid hole 9, and the gas hole 10. Ru. The liquid hole 9 has an inner diameter of 0.1 mm to 0.4 mm, and the gas hole 10 has an inner diameter of 0.1 mm to 0.3 mm.

Furthermore, like the image guide 5 and the light guide 6, the laser fiber 1 mm is connected to the optical fiber strand 22 and the ffl
! 23, and is inserted through the insertion hole 12, the connecting portion 3, and a tube body 24 connected to the proximal end of the connecting portion 3. Further, the base end of the tube body 24 is connected to a laser light source, and a laser beam from this laser light source is irradiated from the distal end of the insertion portion 2 through a 1 mm laser fiber. The inner diameter of this insertion hole 22 is 0.3 mm to 0.5 mm.
It is said that up to Note that the tip of this 1 mm laser fiber is fixed to the tip of the insertion hole 12 with adhesive or the like.

Further, the suction hole 13 is connected to a suction tube 25 connected to the base end of the connecting portion 3, and the base end of this suction tube 25 is connected to a suction device. The inner diameter of this suction hole 13 is from 0.6 mm to 1.5 mm.

Therefore, two swing holes 15 are provided at opposite positions with respect to the axis of the insertion portion 2, and each has an inner diameter of 0.31 mmI.
The diameter of the tube is from 1 mm to 0.5 mm, and is connected to the tube body 26.26 connected to the proximal end of the connecting portion 3.

The guide wire 14 having an outer diameter slightly smaller than the inner diameter of the swinging hole 15 connects to the swinging hole 15 and the tube body 26.
The tip of the guide wire 14 is fixed to the tip of the swing hole 15 with adhesive or the like. Therefore,
If the guide wire 14 on the right side in FIG. 1 is pulled toward the proximal end,
Since the axis of the guide wire 14 is eccentric from the axis of the insert 2, the tip of the insert 2 swings in the direction of the arrow X. Then, when this tensile force is released, the insert body 2 returns to its original state due to its rigidity. Furthermore, if the left guide wire 14 is pulled toward the proximal end, the axis of the guide wire 14 is also eccentric from the shaft 1 of the insert 2, so the distal end of the insert 2 swings in the direction of the arrow Y. move. In this case as well, when the tensile force is released, the original state is restored.

As shown in FIG. 3, the above-mentioned balloon 4 is made of cylindrical thin rubber, is fitted onto the tip of the observation tube I application body 2, and has both ends shaped like a thread made of synthetic resin or the like. The balloon 4 is fixed to the insert body 2 by binding the balloon 4 with a body (not shown) and then bonding the binding portion with an adhesive. Further, the distal end of the inflation fluid hole 8 is opened laterally, and the distal end opening 27 is set to correspond to the balloon 4. The fluid hole 8 is connected to a tube body 29 connected to the proximal end of the connecting portion 3, and the tube body 28 is connected to a fluid source for balloon inflation. The inner diameter of this fluid hole 8 is from 0.1 mm to 0.3 mm. Therefore, when this source of inflation fluid is pressurized,
A fluid (for example, carbon dioxide or physiological saline) is injected into the balloon 4 through the tube body 28 and the inflation fluid hole 8, and the balloon 4 is inflated as shown by the phantom line in FIG.

In order to observe the inside of the tube to be observed 1 using the catheter-type fiberscope according to the present invention, the inserter 2 is inserted into the tube to be observed 1, and its tip is inserted to the site to be observed. Then, the balloon 4 is inflated to temporarily stop the flow of blood, etc. within the tube 1 to be observed. Next, a transparent liquid from the liquid hole 9 or a transparent gas from the gas hole IO flows out from the tip of the insert 2 to form a transparent field of view T on the front surface of the insert 2. Then, the light guide 6 irradiates illumination light onto the observed site, and the image of the observed site reflected from the observed site enters the image guide 5 through the above-mentioned objective lens (not shown). and transmit it to the eyepiece. The transmitted image is then observed with the naked eye or with a camera or the like through the eyepiece lens of the eyepiece section.

Furthermore, if the tube to be observed 1 is branched as shown in FIG. 3, the guide wire 14 can be used to change the direction of the tip of the inserter 2 and insert it into the desired branch tube. I can do it. In other words, if one guide wire 14 is pulled in the direction of arrow A, the insert 2
The tip of the insertion body 2 swings in the direction of the arrow B and can be inserted into the branch pipe 28a.If the other guide wire 14 is pulled as shown by the arrow C, the tip of the insert body 2 swings in the direction of the arrow and can be inserted into the branch pipe 28a. tube 28b
can be inserted into. Furthermore, by operating this guide line 12, the direction of the tip of the inserter 2 can be changed, so the distance between the objective lens and the site to be observed can be adjusted, making focusing easier. At the same time, it is also possible to easily slightly change the site to be observed.

In this case, this catheter-type fiberscope can irradiate laser light onto a hemangioma, etc. in the tube to be observed 1 using a 1 mm laser fiber, or aspirate the contents indwelled in the tube to be observed 1. Via the hole 13 its contents can be removed.

The present invention is not limited to the illustrated embodiment, and the design may be changed without departing from the gist of the present invention. For example, the guide line 1
Although there is only one swinging hole 15 into which the tube 4 is inserted, it is also possible to form an injection hole for injecting a drug into the tube 1 to be observed.

[Effects of the Invention] The observation tube insert 2 of the catheter-type fiberscope of the present invention has a hole formed in the solid body, so it can be used as a tube for fluid to inflate a balloon or for injection into the observation tube. Compared to a tube-type device having tubes for fluids and gases, the observation tube insert 2 can have a smaller wall thickness and has superior strength. Furthermore, since the inner diameter of each hole is limited, the outer diameter of the tube insert 2 to be observed can be extremely small, 3 mm or less. Since it has a suction hole 13, etc., this catheter-type fiberscope has many functions as a catheter, such as removing the indwelling contents in the observation tube 1 and injecting fluid into the observation tube 1. become. Further, the guide wire 14 allows for swinging, thereby making it possible to control the insertion direction of the inserter 2, as well as focusing the image of the region to be observed and changing the position of the region to be observed. Further, since the insertion hole 15 into which the guide wire 14 is inserted and the insertion hole 7 into which the image guide 5 and light guide 6 are inserted are independent, the image guide 5 and the light guide 6 can be inserted by operating the guide wire 14. The light guide 6 is not damaged, and the area to be observed can always be displayed as a clear image.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted side view showing one embodiment of the present invention;
FIG. 2 is an enlarged sectional view of the main part, and FIG. 3 is an enlarged plan view of the main part. 1... Tube to be observed, 2... Tube insert to be observed, 4...
Balloon, 5... Image guide, 6... Light guide, 7... Insertion hole, 8... Inflation fluid hole, 9...
・Liquid hole, 10... Gas hole, 1 mm... Laser fiber, 12... Insertion hole, 13... Suction hole, 14...
・Guide line, 15...hole for swinging. Patent applicant: Mitsubishi Cable Industries Co., Ltd. Procedural Amendment (Published on February 5, 1988 2, Title of invention: Catheter-type fiberscope 3, Relationship with the person making the amendment) Patent applicant: Mitsubishi Cable Industries, Ltd. Co., Ltd. 4, I (J1L) s 8530ffibuη (06)
344-0177 2-5-8 Umeda, Kita-ku, Osaka
Chiyoda Building Nishigai Title 6, Detailed explanation of the invention of Myo Qf subject to amendment. 7. Details of correction (1) "Core and cladding . . . strands 16" in the 3rd and 4th lines of page 6 of light 1 mm BF is corrected as follows. (2) "Light guide 6 ... ... inserted," in lines 12 to 16 of page 6 of the same book is corrected as follows.

Claims (1)

[Claims] 1. A catheter-type fiberscope that is inserted into a small diameter tube to be observed such as a blood vessel, ureter, or fallopian tube to observe the inside of the tube to be observed, the elongated flexible solid body having at least the following: An insertion hole into which an image guide with an outer diameter of 0.2 mm to 0.5 mm and a plurality of light guides with an outer diameter of 20 μm to 70 μm are inserted, and an insertion hole with an inner diameter of 0.1 mm to 0.5 mm.
The inflation fluid hole is up to 3mm in diameter and guides inflation fluid to the balloon attached to the distal end, and the inner diameter is between 0.1mm and 0.1mm.
A liquid hole with a diameter of up to 4 mm and which guides a transparent liquid such as physiological saline into the tube to be observed, and an inner diameter of 0.1 mm to 0.3 mm.
a gas hole that guides a transparent gas such as carbon dioxide gas into the tube to be observed; an insertion hole that has an inner diameter of 0.3 mm to 0.5 mm and into which a laser fiber is inserted; and an inner diameter of 0.6 mm.
mm to 1.5 mm and a suction hole for suctioning and removing the contents of the tube to be observed, and an inner diameter of 0.3 mm to 0.3 mm.
A swing hole into which a guide wire is inserted to change the direction of the tip, and an outer diameter of 3 m.
A catheter-type fiberscope characterized by having an observation tube insert having a diameter of less than m.