JPS6239813A - Endoscope catheter - 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 an endoscopic catheter, and is devised so that treatment can be performed while observing the affected area without falsifying the insertion point of the endoscopic catheter. be.

<Prior Art> A catheter is a thin tubular medical device that is inserted into a cavity of the body and used for suctioning and ingesting fluids, measuring pressure, and the like.

An endoscopic catheter is an instrument used to take a step further and observe the inside of a cavity, and is made up of an image fiber that transmits an image, a fiber that transmits illumination light, and an outer sheath.

<17 Problems to be Solved by the Invention> Since the outer skin of the endoscopic catheter according to the prior art is formed of a metal material, there is a problem that it not only lacks flexibility but also damages the insertion cavity. Ta. In addition, although a therapeutic catheter molded from plastic has been proposed, even when this first method is used, it is only possible to perform contrast imaging with X-rays during treatment, and only shadows can be seen.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide an endoscopic catheter that is highly flexible and allows for direct observation and treatment of affected areas.

<Means for Solving the Problems> The configuration of the present invention for achieving the above object includes an illumination light transmission line for transmitting illumination light and an information light transmission line for receiving and transmitting information light from an object. and a plastic tube that accommodates this information optical transmission line and forms a fluid passage.
The device is characterized by integrating an organic molecular compound with a plastic tube that can serve as a fluid path through which fluid flows to clearly observe the object.

<Example> Embodiments of the present invention will be described in detail below based on the drawings.

1st Hinoki Cypress - Example As shown in Figure 1 (al, fb), a plastic tube 1 houses an image fiber 2 which is an information light transmission line for receiving and transmitting information light from an observation target. At the same time, a fluid passage 3 for treatment is formed in the space between the inner peripheral surface of the plastic tube 1 and the outer peripheral surface of the image fiber 2. At this time, an imaging lens 4 fitted into a stainless steel sleeve is fitted at the tip of the fluid passage 2 so as to close the fluid passage #I2, and the imaging lens 4 captures the image of the object to be observed on the end surface of the image fiber 2. It is designed to form an image. The plastic tube 1 in this example has an outer diameter of 1.2 + nm and an inner diameter of 1.0 m.
The image fiber 2 was made of a nylon 12 tube with a diameter of 0.6 mm. Other suitable materials for the plastic tube 1 include engineering plastics and polyolefin materials. Also, image fiber 2
From the viewpoint of color image transmission characteristics, quartz glass is preferable, but multi-component glass may also be used, and the number of pixels may be changed depending on the purpose. The illumination light transmission line 5 illuminates the object to be observed, and in this example, a 0.75 mm polymethyl methacrylate (hereinafter referred to as PMMA) fiber was used. The illumination light transmission path 5 is also made of transparent plastics such as copolymers of methyl methacrylate (for example, copolymers with fluorine-containing methacrylates, alkyl methacrylates, aryl methacrylates, styrene, alkyl acrylates, etc.), polystyrene, polycarbonate, etc. Depending on the size or length, ie not very long, polymethylpentene can also be used.

The plastic tube 6 can serve as a fluid passage for clearly observing the object, and in this embodiment, the outer diameter is 0.
An 8 mm nylon 12 tube with an internal diameter of 06 was used. These plastic tube 1, fluid passage 3, and illumination light transmission path 5 are integrated with an integrated member 7 made of ether type urethane. As a result of step (B), an endoscopic catheter with a diameter of 22 mm was formed. As the integrated member 7, other organic polymer compounds such as two-component reactive polyurethane, flexible epoxy resin, silicone rubber, etc. can be suitably used. Furthermore, in this embodiment, a plurality of holes 8 are formed that penetrate in the radial direction from the peripheral surface of the integrated member 7 and reach fluid communication #13, and a therapeutic fluid is supplied through these holes 8. I'm starting to get it. At this time, the hole 8 was set to be 0.2 mm.

As a result of inserting such an endoscopic catheter into a simulated blood vessel and observing the inner surface, good results were obtained.

That is, when a thrombolytic agent was supplied as a therapeutic fluid through the hole 8, the artificially created thrombus could be dissolved.

The surface of the organic polymer compound integrated member 7 was marked with a measuring mark and coated with 20 μm of water-soluble polyester urethane (Hytran Hw310 manufactured by Dainippon Ink) to further facilitate insertion into the body cavity.

Incidentally, urethane resins are often used as coating materials for smoothing the surface, and among these resins, polyurethane dissolved in a solvent such as dimethylformamide or toluene is often used.

However, this case has the disadvantage that expensive equipment is required to dispose of the scattered solvent after coating. On the other hand, water-dispersed urethane is usually used to eliminate the drawback of point (B), but in this case, it is necessary to perform water dissolution to remove the dispersant before inserting it into the body, and this detergent It has the additional disadvantage of requiring expensive equipment for water treatment.

The coating layer made of water-soluble polyester urethane overcomes the above-mentioned drawbacks and can maintain good slippage on the outer circumferential surface, which is particularly required for an endoscopic catheter.

Second Embodiment As shown in FIGS. 2(a) and 2(b), in this embodiment, a bent portion 9 is formed at the tip of the previous embodiment. This bent part 9 is formed by cutting off the distal end 7a of the tubular integrated member 7, and having the distal end fixed to the distal end 7a, the bent part 9 is inserted along the axial direction of the tube, and the other end protrudes outside.
It has a stainless steel wire 10 for bending, and by pulling the other end of the stainless steel wire 10 for bending, the tip part 7a
is bent. More specifically, the stainless steel wire 10 had a diameter of 0.2 mm and was inserted through each of four polyvinylidene fluoride tubes 11 arranged at four positions in the circumferential direction of the tube. Yes
The length of the bent portion 9 is 30+nm, and a 0.1 mm thick heat shrink tube 12 with a JIS hardness higher than other parts is used as the outer cover.
A ring-shaped spring 3 having a diameter of 0.3 mm was disposed in the axial direction of the spring 2. As a result, the maximum outer diameter of the bent portion 9 was 2.6 mm.

When such an endoscopic catheter was inserted into a pipe having an inner diameter of 10 mm, the stainless steel wire 10 was pulled, the distal end portion 7a was bent, and the illumination light was transmitted by about 201111 mm for observation, the inner circumferential surface of the pipe was observed well.

LQ-Fact” 1 example Figure 3 fat, (as shown in bl, this example
A hemostasis balloon 14 is formed at the tip of the embodiment. This hemostasis balloon 14 is connected from the fluid passage 3 to the hole 8.
It expands continuously when the fluid supplied through it flows into the inside, and has an inner diameter of 2.2 n+m and a thickness of 0.
．． A natural rubber pipe with a diameter of 2+ nm and a length of 20 mm was placed over the integrated member 7 so as to cover the hole 8, and 5 mm of both ends were adhered to the integrated member 7 with urethane adhesive. This hemostasis balloon 14 is configured to be inflatable up to 20 times its diameter. Further, another suitable material for the hemostasis balloon 14 is urethane rubber that can be continuously expanded.

The endoscopic catheter was inserted into a simulated blood vessel with an inner diameter of 8 mm, and while red ink was flowing at a rate of 100 cc/min, about 0.5 cc of 9% physiological saline was added to the hemostasis balloon 14, and the inner surface of the simulated blood vessel was clearly visible. Now you can observe the physiological saline from plastic tube 6 to 3.
When cc was supplied, the inner peripheral surface of the simulated blood vessel could be seen more clearly. Thus, it was confirmed that the aperture filled with opaque liquid is useful for observing and treating abnormalities in blood vessels, for example.

Fourth Embodiment As shown in FIG.
A treatment balloon 15 is formed at the tip of the embodiment. This treatment balloon 15 is connected from the fluid passage 3 to the hole 8.
It expands to a predetermined size when fluid supplied through it flows into the inside, and has an inner diameter of 3.0 mm and a thickness of 0.1 mm.

Crinkle both ends of an EVA tube with a length of 20 mm to a diameter of 2.2 mm and fit it over the integrated member 7 so as to cover the hole 8.
mm is attached to the integrated member 7 with urethane adhesive. Further, other suitable materials for the treatment balloon 15 include EEA1 nylon and the like.

When 0.1 cc of saline was sent to the therapeutic balloon 15 of such an endoscopic catheter, the therapeutic balloon 15 was 2.0 cc.
It expanded to 7 mmφ. Thus, it was confirmed that the drug is useful for dilating narrowed areas of blood vessels.

As shown in Figures 5 (al and bl), this embodiment is a hemostasis balloon 1 by displacing the distal end of the first embodiment in the axial direction.
4 and a treatment balloon 15 are provided. In this embodiment, a fluid passage #116 for supplying fluid to the hemostasis balloon 14 is separately provided, but essentially one fluid passage #116 can be shared by the fluid passage 3. That is, when the fluid passage 3 is shared, the six treatment balloons 15 are inflated only to a certain size, and after being inflated to a certain size, only the hemostasis balloon 14 is inflated depending on the fluid supplied. just,
When two fluid passages are provided as in this embodiment, both balloons 1.4.15 can be inflated separately.

Such an endoscopic catheter can not only stop bleeding but also perform treatments such as dilating a narrowed part of a blood vessel or the like where cholesterol has accumulated.

Five embodiments according to the present invention have been described above, but the present invention is such that the outer peripheral surface of the integrated member 7 of the second to fifth embodiments is coated with a coating layer similar to that of the first embodiment. , those in which the bending portion 9 of the second embodiment is provided in the third to fifth embodiments, and the third to fifth embodiments.
The fifth embodiment also includes one in which the coating layer and the bent portion 9 are provided.

<Effects of the Invention> As specifically explained above in conjunction with the embodiments, according to the present invention, it is possible not only to perform good observation of the affected area without damaging the area into which the endoscopic catheter is inserted; Appropriate treatment can also be given.

[Brief explanation of drawings]

Figure 1 (al is an end view showing the first embodiment of the present invention, Figure 1 (b) is a perspective view with a part thereof cut away, Figure 2 (
al is an end view showing the second embodiment of the present invention, FIG.
) is a partially cutaway perspective view, FIG. 3 (al is an end view showing the third embodiment of the present invention, FIG. 3 is a partially cutaway perspective view, and FIG. 4 is a partially cutaway perspective view). (a) is a sectional view showing the fourth embodiment of the present invention, FIG. 4(b) is a partially cutaway perspective view, and FIG. 5 (al indicates the fifth embodiment of the present invention). The end view and FIG. 5(b) are partially cutaway perspective views. In the drawings, 1 is a plastic tube, 2 is an image fiber, 3 is a fluid passage, 5 is an illumination light transmission path, and 6 is a plastic tube. 1 is a tube, 7 is an integrated member, 9 is a bent portion, 10 is a stainless steel wire, 14 is a hemostatic balloon, and 15 is a treatment balloon.

Claims (22)

[Claims] (1) An illumination light transmission path for transmitting illumination light, an information light transmission path for receiving and transmitting information light from an object, and a fluid passageway that accommodates this information light transmission path. An endoscopic catheter characterized in that a plastic tube and a plastic tube that can serve as a fluid path through which fluid flows for clear observation of an object are integrated using an organic polymer compound. (2) Polymethyl methacrylate as an illumination light transmission line,
The endoscopic catheter according to claim 1, characterized in that a transparent plastic material such as a copolymer of methyl methacrylate, polystyrene, or polycarbonate is used. (3) The endoscopic catheter according to claim 1, characterized in that an image fiber is used as the information optical transmission path. (4) The endoscopic catheter according to claim 1, wherein the organic polymer compound to be integrated is two-part reactive polyurethane, silicone rubber, or epoxy resin. (5) An illumination light transmission line for transmitting illumination light, an information light transmission line for receiving and transmitting information light from a target, and a fluid passage that accommodates this information light transmission line. The plastic tube and the plastic tube, which can serve as a fluid passage for fluid to clearly observe the object, are integrated with an organic polymer compound, and the outer surface of the organic polymer compound is coated with water-soluble urethane. Characteristic endoscopic catheter. (6) An illumination light transmission line for transmitting illumination light, an information light transmission line for receiving and transmitting information light from a target, and a fluid passage that accommodates this information light transmission line. The plastic tube and the plastic tube that can serve as a fluid passage for the fluid to clearly observe the object are integrated with an organic polymer compound tube, and the tip of the organic polymer compound tube is separated. The tube has a bending wire whose tip is fixed to the tube, which is inserted along the axial direction of the tube, and whose other end projects outside, and by pulling the other end of the bending wire, a bending portion is formed in which the tip is bent. An endoscopic catheter characterized by: (7) An illumination light transmission line for transmitting illumination light, an information light transmission line for receiving and transmitting information light from a target, and accommodating this information light transmission line and forming a fluid passage. The plastic tube and the plastic tube that can serve as a fluid passage for the fluid to clearly observe the object are integrated with an organic polymer compound tube, and the outer circumferential surface of the organic polymer compound is coated with water-soluble urethane. Further, the distal end of the organic polymer compound tube is cut off, and a bending wire is fixed to the distal end, and the bending wire is inserted along the axial direction of the plastic tube and the other end protrudes outside. 1. An endoscopic catheter characterized in that a bending portion is formed in which the distal end portion is bent by pulling the other end of the wire. (8) An illumination light transmission line for transmitting illumination light, an information light transmission line for receiving and transmitting information light from a target, and a fluid passage that accommodates this information light transmission line and has a closed end. The plastic tube that forms the fluid passage and the plastic tube that can serve as a fluid path for distributing fluid for clearly observing the object are integrated using an organic polymer compound, and the plastic tube that forms the fluid passage and A balloon is provided at the tip of the organic polymer compound, which is continuously inflated when fluid supplied from the fluid passage flows into the interior through holes that are continuously drilled radially through the peripheral surface of the organic polymer compound. An endoscopic catheter characterized by: (9) The endoscopic catheter according to claim 8, wherein the balloon is made of natural rubber, silicone rubber, or urethane rubber. (10) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passageway with a closed end, and a plastic tube that can serve as a fluid passageway through which fluid can be observed to clearly observe an object, are made of an organic polymer compound. At the same time, the fluid supplied from the fluid passage is passed through holes that are continuously drilled radially from the circumferential surface of the plastic tube and organic polymer compound forming the fluid passage. 1. An endoscopic catheter, characterized in that a balloon is provided at the distal end of the catheter, and the outer peripheral surface of the organic polymer compound is coated with water-soluble urethane. (11) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passage with a closed end, and a plastic tube that can serve as a fluid passage for fluid to clearly observe the object, are made of an organic polymer compound. The fluid is integrated with a tube and is supplied from the fluid passage through holes that are continuously drilled radially through the circumferential surfaces of the plastic tube and organic polymer compound tube that form the fluid passage. A balloon is provided at the tip of the tube that expands continuously when a fluid flows into the tube, and the tip of the organic polymer compound tube is cut off, the tip is fixed to this tip, and the tube is inserted along the axial direction of the tube. The balloon has a bending wire whose other end protrudes to the outside, and by pulling the other end of the bending wire, a bent part is formed in which the distal end part displaced in the axial direction with respect to the fixed position of the balloon is bent. Characteristic endoscopic catheter. (12) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passage with a closed end, and a plastic tube that can serve as a fluid passage for fluid to clearly observe the object, are made of an organic polymer compound. The fluid is integrated with a tube and is supplied from the fluid passage through holes that are continuously drilled radially through the circumferential surfaces of the plastic tube and organic polymer compound tube that form the fluid passage. A balloon that expands continuously when fluid flows into the tube is installed at the tip, and the outer circumferential surface of the organic polymer compound is coated with water-soluble urethane.The tip of the organic polymer tube is cut off. It has a bending wire whose tip is fixed to the tube, which is inserted along the axial direction of the tube, and whose other end protrudes outside, and by pulling the other end of the bending wire, the axis is moved to the fixed position of the balloon. 1. An endoscopic catheter characterized by forming a bent part in which a distal end part that is displaced in a direction is bent. (13) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passageway with a closed end, and a plastic tube that can serve as a fluid passageway through which fluid can be observed to clearly observe an object, are made of an organic polymer compound. At the same time, the fluid supplied from the fluid passage is passed through holes that are continuously drilled radially from the circumferential surface of the plastic tube and organic polymer compound forming the fluid passage. 1. An endoscopic catheter characterized by having a balloon at its distal end that expands to a predetermined size by flowing into the catheter. (14) The endoscopic catheter according to claim 13, wherein the balloon is made of EEA, EVA, or nylon. (15) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passageway with a closed end, and a plastic tube that can serve as a fluid passageway through which fluid can be observed to clearly observe an object, are made of an organic polymer compound. At the same time, the fluid supplied from the fluid passage is passed through holes that are continuously drilled radially from the circumferential surface of the plastic tube and organic polymer compound forming the fluid passage. 1. An endoscopic catheter, characterized in that a balloon is provided at the distal end of the catheter and expands to a predetermined size by flowing into the organic polymer compound, and further the outer peripheral surface of the organic polymer compound is coated with water-soluble urethane. (16) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passage with a closed end, and a plastic tube that can serve as a fluid passage for fluid to clearly observe the object, are made of an organic polymer compound. The fluid is integrated with a tube and is supplied from the fluid passage through holes that are continuously drilled radially through the circumferential surfaces of the plastic tube and organic polymer compound tube that form the fluid passage. A balloon that expands to a predetermined size when a fluid flows into the tip is provided at the tip, and the tip of the organic polymer compound tube is cut off and the tip is fixed to this tip and extends in the axial direction of the plastic tube. It has a bending wire that is inserted along the line and has the other end protruding to the outside, and by pulling the other end of the bending wire, a bending part is formed in which the distal end part displaced in the axial direction with respect to the fixed position of the balloon is bent. An endoscopic catheter characterized by: (17) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passage with a closed end, and a plastic tube that can serve as a fluid passage for fluid to clearly observe the object, are made of an organic polymer compound. The fluid is integrated with a tube and is supplied from the fluid passage through holes that are continuously drilled radially through the circumferential surfaces of the plastic tube and organic polymer compound tube that form the fluid passage. A balloon that expands to a predetermined size when a fluid flows into the tube is installed at the tip, and the outer circumferential surface of the organic polymer compound is coated with water-soluble urethane. A bending wire whose tip is fixed to the distal end of the cutoff and which is inserted along the axial direction of the plastic tube and whose other end protrudes outside is provided, and by pulling the other end of the bending wire, the fixed position of the balloon can be adjusted. 1. An endoscopic catheter characterized by forming a bent part in which a distal end part displaced in an axial direction is bent. (18) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passageway with a closed end, and a plastic tube that can serve as a fluid passageway through which fluid can be observed to clearly observe an object, are made of an organic polymer compound. At the same time, the fluid supplied from the fluid passage is passed through holes that are continuously drilled radially from the circumferential surface of the plastic tube and organic polymer compound forming the fluid passage. 1. An endoscopic catheter characterized in that a balloon that is continuously inflated by flowing into the body and a balloon that is inflated to a predetermined size are provided at distal ends at different positions in the axial direction. (19) The continuously expanding balloon is made of natural rubber, silicone rubber, or urethane rubber, and
19. The endoscopic catheter according to claim 18, wherein the balloon that is inflated to a predetermined size is made of EEA, EVA, or nylon. (20) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passageway with a closed end, and a plastic tube that can serve as a fluid passageway through which fluid can be observed to clearly observe an object, are made of an organic polymer compound. At the same time, the fluid supplied from the fluid passage is passed through holes that are continuously drilled radially from the circumferential surface of the plastic tube and organic polymer compound forming the fluid passage. A balloon that expands continuously by flowing into the container and a balloon that expands to a predetermined size are provided at different positions in the axial direction, respectively, and the outer peripheral surface of the organic polymer compound is coated with water-soluble urethane. An endoscopic catheter characterized by: (21) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passage with a closed end, and a plastic tube that can serve as a fluid passage for fluid to clearly observe the object, are made of an organic polymer compound. The fluid is integrated with a tube and is supplied from the fluid passage through holes that are continuously drilled radially through the circumferential surfaces of the plastic tube and organic polymer compound tube that form the fluid passage. A balloon that expands continuously when a fluid flows into the interior and a balloon that expands to a predetermined size are provided at different axial positions at different tip portions, and the tip portion of the organic polymer compound tube is separated. This distal end has a bending wire whose tip is fixed and which is inserted along the axial direction of the plastic tube and whose other end protrudes outside, and by pulling the other end of the bending wire, the balloon is fixed to the fixed position. An endoscopic catheter characterized in that a bent portion is formed in which the distal end portion is bent in the axial direction. (22) an illumination light transmission line for transmitting illumination light; an information light transmission line for receiving and transmitting information light from a target;
A plastic tube that accommodates this information optical transmission path and forms a fluid passage with a closed end, and a plastic tube that can serve as a fluid passage for fluid to clearly observe the object, are made of an organic polymer compound. The fluid is integrated with a tube and is supplied from the fluid passage through holes that are continuously drilled radially through the circumferential surfaces of the plastic tube and organic polymer compound tube that form the fluid passage. A balloon that expands continuously when a fluid flows into the interior and a balloon that expands to a predetermined size are provided at different tips in the axial direction, and the outer peripheral surface of the organic polymer compound is coated with water-soluble urethane. At the same time, the distal end of the organic polymer compound tube is cut off, and a bending wire is attached to the distal end, and the bending wire is inserted along the axial direction of the plastic tube and the other end protrudes outside. An endoscopic catheter characterized in that a bending portion is formed in which a distal end portion is bent in an axial direction with respect to a fixed position of the balloon by pulling the other end of the bending wire.