Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-02-26
1994-05-03
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 96, 604101, 606192, 606194, A61M 3700, A61M 2900
Patent
active
053083237
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a catheter, and particularly to a catheter which is inserted into the blood vessels, urethra, and similar vessels of the body.
2. Background Art
Various methods have been developed for the treatment of arterial and vascular constriction or occlusion due to arteriosclerosis, and for the removal of thrombi.
The most widely used method is bypass surgery in which the lesioned member of the blood vessel is surgically removed and replaced with a section of blood vessel from the patient or with an artificial blood vessel, thus physically eliminating the problem. However, because this procedure necessitates cutting the body open, the load on the body is great and treatment incurs great cost.
Drug therapy is also employed, but this is only effective for dissolving thrombi, and is not very successful at removing arteriosclerotic foci or occlusions.
New alternative methods selectively employed include the insertion of a catheter with a balloon into the blood vessel and inflating the balloon at the site of the lesion to mechanically enlarge the blood vessel at the constricted site, and the insertion of a catheter with a balloon in which is carried an optical fiber for laser conduction. In this latter method, the balloon is inflated to occlude the blood vessel and stop the blood f low while the laser is used to evaporate the lesion.
Diagnostic techniques employed with the inside wall of the blood vessels includes the insertion of a catheter containing an imaging fiber into the blood vessel to inspect lesions using said imaging fiber.
In the use of such a catheter for therapy or diagnosis as previously described, it must be possible to steer the catheter in the desired direction at blood vessel bifurcations in order for the catheter to reach the site of the target lesion.
This is presently accomplished by using a catheter the leading end of which is bent to a specific angle. The catheter is steered by rotating the hand-held end of the catheter to align the leading end with the branch vessel down which the catheter is to be conducted. However, large individual differences in the shape and condition of said bifurcations make it difficult to use catheters of the above construction with all patients, and it is also difficult to conduct the catheter down the desired branch at complex, multi-branched junctions.
It has therefore been proposed to use a jointed ring construction on the catheter end and to steer the catheter in the desired direction by operating a wire passing through the catheter. However, because the construction of such a catheter is complex, it is difficult to achieve a fine diameter catheter.
With respect the aforementioned problems, a catheter according to the present invention provides a construction which is simple and which can be easily conducted in the desired direction through blood vessels and other vessels of the body.
DISCLOSURE INVENTION
A catheter according to a first embodiment of the present invention is comprised of multiple compartments along the circumference of the inside of the balloon, and individual fluid supply channels provided for each compartment.
A catheter according to a second embodiment of the present invention is comprised of multiple balloons along the circumference of the catheter, and individual fluid supply channels provided for each balloon.
Using a catheter according to said first embodiment, the catheter tip can be aligned in the desired direction when the catheter is inserted into a blood vessel or similar vessel by supplying a fluid to a specific compartment through the fluid supply channels and thus inflating that compartment.
Furthermore, using a catheter according to said first embodiment, the catheter tip can be aligned in the desired direction by likewise supplying a fluid to a specific balloon to inflate said balloon.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a front view of a first embodiment of a catheter according to the present invention,
FIG. 2 is a cross section of said first catheter,
FIG.
REFERENCES:
patent: 4141364 (1979-12-01), Schultze
patent: 4183102 (1980-01-01), Guiset
patent: 4327720 (1982-05-01), Bronson et al.
patent: 4406656 (1983-09-01), Hattler et al.
patent: 4581017 (1986-04-01), Sahota
patent: 4878495 (1989-11-01), Grayzel
patent: 4958364 (1990-09-01), Jang
patent: 5102416 (1992-04-01), Rock
Kanazawa Shin-ichi
Niwa Shin-ichiro
Sogawa Ichiro
Uemiya Takafumi
Yotsuya Koro
Bockelman Mark
Rosenbaum C. Fred
Sumitomo Electric Industries. Ltd.
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