JPH02124127A - In-blood vessel endoscope catheter - Google Patents

Abstract

PURPOSE:To prevent the inside of a blood vessel from being blocked in advance and to eliminate blood transfusion when a catheter is used by providing an attracting and filting part to filter and reflex a removed gruel ulcer (atheroma). CONSTITUTION:The tip side of a catheter 20 is inserted into a blood vessel A and a catheter main body 21 is positioned in the center of the blood vessel A by a balloon 23. Further, the inside of the blood vessel A is irradiated with a light guide 3 and observed by an image fiber 2. Then, a crushing and attracting body 22 is positioned in the vicinity of atheroma B. Next, flash light is suitably injected and an ultrasonic oscillating element 26 is driven. Then, an ultrasonic wave is oscillated and the atheroma B is oscillated. Simultaneously, a pump 28 is driven as well and attracting filting and refluxing is executed. The atheroma B is crushed by irradiating and oscillating the ultrasonic wave, further attracted together with blood and filtered by a filter 34. Thus, only the clean blood is refluxed into the blood vessel A.

Description

Detailed Description of the Invention "Field of Industrial Application" This invention relates to a catheter having a fiberscope for observing the inside of a blood vessel, and a catheter capable of medically removing atheroma in a stenotic area. Regarding endoscopic catheters.

"Prior Art" Conventionally, as this type of endoscopic catheter, for example, one shown in FIG. 3 is known. In FIG. 3, reference numeral 1 indicates an endoscopic catheter. This endoscopic catheter l includes an image fiber 2 for observing the inside of a blood vessel, a light guide 3 for irradiating light into the blood vessel, and a flash for injecting a flush liquid into the blood vessel to secure a visual field. The device is equipped with a channel 4 and an optical fiber 5 for guiding a laser beam as a means for removing atheroma from the inner wall of a blood vessel.

Further, a flush liquid injector 6 for introducing flush liquid into the flush channel 4 is connected to the rear end side of the endoscopic catheter l. Further, a TV camera 7 and a monitor 8 that are optically connected to the image fiber 2 and display images transmitted from the image fiber 2 are connected to one branched end of the rear end of the endoscopic catheter l, and a monitor 8 is connected to the other end. A light source 9 for transmitting light to the light guide 3 and a laser device 10 for inputting laser light into the optical fiber 5 are connected. Laser device 1
As the optical fiber 5, a COt laser, a CO laser, an Er-YAG laser, an excimer laser, or the like is used for irradiation, and a waveguide matched with this is used as the optical fiber 5.

To remove atheroma deposited on the intima of an artery using the endoscopic catheter 1 having such a configuration,
First, as shown in Figure 4, insert the endoscopic catheter l into blood vessel A.
The distal end side of the blood vessel A is inserted, and the inside of the blood vessel A is irradiated with the light guide 3, and the inside of the blood vessel A is observed with the image fiber 2, and the optical fiber tube 5 is positioned near the atheroma B. Next, a flash liquid is appropriately injected, and a laser beam is emitted from the laser device 10 to be emitted from the optical fiber 5, and the atheroma area is irradiated with the laser beam to evaporate and remove the atheroma B.

In addition, as an endoscopic catheter capable of removing atheroma, for example, an image fiber 11 as shown in FIG.
is also known. This image fiber 11 is provided with a drill 12 instead of a laser beam as a means for removing atheroma, thereby crushing the atheroma.

``Problems to be Solved by the Invention'' By the way, when using the above-mentioned endoscopic catheters to remove atheroma from the inner wall of blood vessels, atheroma fragments that become powder due to evaporation or pulverization. However, there is a risk that it may flow within the blood vessels and clog peripheral blood vessels.

"Means for Solving the Problems" Therefore, in the vascular circular endoscopic catheter of the present invention, the above problems were solved by providing a suction filtration section for filtering and refluxing the removed atheroma.

"Function" According to the angioendoscopic catheter of the present invention, the removed powdered diaphragm seed pieces are filtered from the blood in the suction filtration section,
Furthermore, the filtered blood can be returned to the blood vessels.

Embodiment FIGS. 1 and 2 are diagrams showing an embodiment of the present invention, and in these figures, reference numeral 20 denotes a vascular endoscopic catheter (hereinafter abbreviated as catheter). In these figures, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and the explanation thereof will be omitted.

As shown in FIG. 1, the catheter 2o has a plurality of holes formed in the catheter body 21 along the length direction of the catheter body 21 and opening at the distal end surface 21a of the catheter body 21, and an image fiber 2 is formed in the catheter body 21 for nucleation. The light guide 3 and flannel channel 4 are inserted through it, and a crushing suction body 22 is provided in a state protruding from the distal end surface 21a.
Further, a balloon 23 is provided on the side peripheral surface of the catheter body 21 near the distal end surface 21a.

As shown in FIG. 2, the crushing suction body 22 has an ultrasonic oscillation section 24 and a suction filtration section 25 inside. The ultrasonic oscillation unit 24 includes an ultrasonic oscillation element 2G and an oscillation conduit 27 connected to the ultrasonic oscillation element 2G, and an ultrasonic oscillation element 26 is connected to a power source (not shown) arranged at the rear of the catheter 20. It is what was done. The oscillation pipe 27 has its tip disposed flush with the tip surface of the crushing suction body 22,
This is for transmitting the ultrasonic waves oscillated from the ultrasonic oscillation element 26 to an atheroma or the like. Based on such a configuration, the ultrasonic oscillator 24 can transmit the ultrasonic waves oscillated from the ultrasonic oscillating element 26 to the atheroma etc. through the oscillation pipe 27, thereby pulverizing the atheroma etc. by vibration. It has become a thing. The suction filtration section 25 is connected to the catheter 2
It consists of a pump 28 connected to a power supply (not shown) at the rear of the pulverizing suction body 22, and a double pipe 29 connected in communication with the pump 28. The parts are arranged. The double tube 29 has a suction path 31 inside the inner tube 30 and a return path 33 between the inner tube 30 and the outer tube 32, and the filter 34 is connected to the inner tube 30 with the suction path 31 closed. is arranged. Based on such a configuration, the suction filtration section 25 sucks the object to be processed together with blood from the suction path 31 by driving the pump 28 , filters it through the filter 34 , and then filters it through the pump 28 .
The filtered blood is returned to the blood vessel through a return path 33.

The balloon 23 allows air to be introduced from the rear of the catheter 20.
The catheter body 2 is configured to be able to be discharged, and when air is introduced and expanded, the catheter body 2 is inserted into the center of the blood vessel.
This is for positioning 1.

To remove atheroma deposited on the intima of an artery using the catheter 20 having such a configuration, first insert the distal end of the catheter 20 into the blood vessel A as shown in FIG. 21 is located in the center of blood vessel A. Furthermore, the inside of the blood vessel A is irradiated with the light guide 3, observed with the image fiber 2, and the crushing suction body 22 is positioned near the atheroma B. Next, a flushing liquid is appropriately injected, and the ultrasonic oscillation element 26 is driven to oscillate ultrasonic waves to vibrate the atheroma B. At the same time, the pump 28 is also driven to perform suction filtration and reflux. The atheroma B is then pulverized by ultrasonic irradiation and vibration, and is further sucked together with blood by the pump 28 and filtered by the filter 34, whereby only clean blood is returned to the blood vessel A.

With such a catheter 20, by emitting ultrasonic waves and irradiating the atheroma B, the atheroma can be vibrated and removed from the inner wall of the blood vessel A without damaging the inner wall surface of the blood vessel A or its normal cells. can do.

Furthermore, by providing the suction filtration section 25, the crushed atheroma B can be filtered and removed from the blood vessel A.
Furthermore, accidents such as clogging of peripheral blood vessels can be prevented.

In the above embodiment, the ultrasonic oscillation unit 24 having an ultrasonic oscillation element was used as a means for removing the seeds in the blood vessel, but the ultrasonic oscillation unit 24 having an ultrasonic oscillation element was used as a means for removing the seeds in the blood vessel. A removal means such as a laser beam shown in FIG. 3 or a drill shown in FIG. 5 may be used.

"Effects of the Invention" As explained above, the endovascular endoscopic catheter of the present invention is provided with a suction filtration section for filtering and refluxing the removed atheroma. By filtering powdered calyx seeds from blood in the suction filtration section, it is possible to prevent accidents such as occlusion of blood vessels, and since the filtered and purified blood is returned to blood vessels, it can be used. This eliminates the need for blood transfusions and is highly user-friendly.

[Brief explanation of drawings]

1 and 2 are diagrams showing an embodiment of the endovascular endoscopic catheter of the present invention, in which FIG. 1 is an enlarged schematic configuration diagram of the main part (tip part) of the catheter, and FIG. 3 and 4 are diagrams showing an example of a conventional endoscopic catheter. FIG. 3 is a schematic diagram of the endoscopic catheter, and FIG. A cross-sectional view for explaining how to use an endoscopic catheter, and FIG. 5 is a schematic configuration diagram showing another example of a conventional endoscopic catheter. 2...Image fiber, 3...Light guide, 4...Flash channel) 20
...Intravascular endoscopic catheter, 22...
・Crushing suction body, 24... Ultrasonic oscillator, 25.
...Suction filtration section, 28 ...Pump, 29
...Double tube, 34...Filter.

Claims (1)

[Claims] An endovascular endoscopic catheter comprising an image fiber, a light guide, a flush channel, and a removal means for removing the pollen in the blood vessel, An endovascular endoscopic catheter characterized by being provided with a suction filtration section for filtration and reflux.