CA1337792C - Catheter - Google Patents
CatheterInfo
- Publication number
- CA1337792C CA1337792C CA000609797A CA609797A CA1337792C CA 1337792 C CA1337792 C CA 1337792C CA 000609797 A CA000609797 A CA 000609797A CA 609797 A CA609797 A CA 609797A CA 1337792 C CA1337792 C CA 1337792C
- Authority
- CA
- Canada
- Prior art keywords
- catheter
- tube
- balloon
- vessel
- compartments
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1011—Multiple balloon catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1072—Balloon catheters with special features or adapted for special applications having balloons with two or more compartments
Abstract
A catheter has an inner tube for forming a drug supply channel, and an outer tube for receiving the inner tube.
Separation walls extend between the inner and outer tubes for forming a plurality of supply channels for supplying fluid. A balloon is mounted outside the outer tube and has a plurality of separation walls extending between the outer tube and the balloon for forming multiple compartments around the outside circumference of the outer tube. As a result the direction of the catheter can be controlled at bifurcations in a blood vessel by supplying fluid through a selected supply channel to at least one compartment to inflate it.
Separation walls extend between the inner and outer tubes for forming a plurality of supply channels for supplying fluid. A balloon is mounted outside the outer tube and has a plurality of separation walls extending between the outer tube and the balloon for forming multiple compartments around the outside circumference of the outer tube. As a result the direction of the catheter can be controlled at bifurcations in a blood vessel by supplying fluid through a selected supply channel to at least one compartment to inflate it.
Description
-CATHETER
The present invention relates to a catheter, and particularly to a catheter that can be inserted into the blood vessels, urethra, or similar vessels of the body.
Various methods have been developed for the treatment of arterial, vascular stenosis and obturation 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 stress 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. The catheter and balloon may also carry an optical fiber for laser conduction. In this latter method, the balloon is inflated to occlude the blood vessel and stop the blood flow while the laser is used to evaporate the _ - 2 - 1337792 lesion.
Diagnostic techniques for the inside walls of blood vessels include the insertion of a catheter containing an - imaging fiber into the blood vessel to inspect lesions.
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. ~he 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 such bifurcations make it difficult to use catheters of this construction with all patients. 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 make the catheter with a sufficiently small diameter.
With respect to these problems, a catheter according to the present invention provides a construction that is simple and can be easily conducted in the desired direction through blood vessels and other vessels of the body.
In accomplishing these and other objects, the invention provides a catheter comprising: a tube sized so as to be capable of being inserted into a vessel of the human body, said tube having partitions for dividing said tube into a plurality of channels for carrying a first fluid, said tube having a tip disposed at an end thereof; a balloon disposed about said tip of said tube, said balloon including radial walls defining multiple compartments, said compartments being . '~
_ 3 _ l 3 3 7 7 9 2 disposed between said walls inside of said balloon, each - compartment corresponding to a respective channel of said tube, said balloon compartments further including separation walls - defined by said tube for separating said compartments from corresponding channels, each said separation wall having an opening so that each compartment can be selectively inflated by directing fluid into a corresponding channel and through said opening enabling the position of said catheter to be controlled by contact with a wall of said vessel.
These and other features of the present invention will become apparent from the following description of preferred embodiments thereof with reference to the accompanying drawings, in which:
Fig. 1 is a side view of a catheter according to a first embodiment of the present invention;
Fig. 2 is a cross-sectional view of the catheter shown in Fig. l;
Fig. 3 and Fig. 4 are diagrammatic views showing the catheter of Fig. 1 in use; and Fig. 5 is a cross-sectional view of a catheter according to another embodiment of the present invention.
Referring to Fig. 1, a front end portion of a catheter 1 is shown. The end portion shown comprises an inner tube 8 for forming a channel 7 for supplying drugs or the like, an outer tube 6 for receiving the inner tube 8 therein and for forming fluid supply channels 5 between the tubes 6 and 8, and a balloon
The present invention relates to a catheter, and particularly to a catheter that can be inserted into the blood vessels, urethra, or similar vessels of the body.
Various methods have been developed for the treatment of arterial, vascular stenosis and obturation 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 stress 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. The catheter and balloon may also carry an optical fiber for laser conduction. In this latter method, the balloon is inflated to occlude the blood vessel and stop the blood flow while the laser is used to evaporate the _ - 2 - 1337792 lesion.
Diagnostic techniques for the inside walls of blood vessels include the insertion of a catheter containing an - imaging fiber into the blood vessel to inspect lesions.
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. ~he 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 such bifurcations make it difficult to use catheters of this construction with all patients. 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 make the catheter with a sufficiently small diameter.
With respect to these problems, a catheter according to the present invention provides a construction that is simple and can be easily conducted in the desired direction through blood vessels and other vessels of the body.
In accomplishing these and other objects, the invention provides a catheter comprising: a tube sized so as to be capable of being inserted into a vessel of the human body, said tube having partitions for dividing said tube into a plurality of channels for carrying a first fluid, said tube having a tip disposed at an end thereof; a balloon disposed about said tip of said tube, said balloon including radial walls defining multiple compartments, said compartments being . '~
_ 3 _ l 3 3 7 7 9 2 disposed between said walls inside of said balloon, each - compartment corresponding to a respective channel of said tube, said balloon compartments further including separation walls - defined by said tube for separating said compartments from corresponding channels, each said separation wall having an opening so that each compartment can be selectively inflated by directing fluid into a corresponding channel and through said opening enabling the position of said catheter to be controlled by contact with a wall of said vessel.
These and other features of the present invention will become apparent from the following description of preferred embodiments thereof with reference to the accompanying drawings, in which:
Fig. 1 is a side view of a catheter according to a first embodiment of the present invention;
Fig. 2 is a cross-sectional view of the catheter shown in Fig. l;
Fig. 3 and Fig. 4 are diagrammatic views showing the catheter of Fig. 1 in use; and Fig. 5 is a cross-sectional view of a catheter according to another embodiment of the present invention.
Referring to Fig. 1, a front end portion of a catheter 1 is shown. The end portion shown comprises an inner tube 8 for forming a channel 7 for supplying drugs or the like, an outer tube 6 for receiving the inner tube 8 therein and for forming fluid supply channels 5 between the tubes 6 and 8, and a balloon
2 located on the outside of the outer tube 6. The inside of the balloon 2 is formed with multiple compartments 4 separated by walls 3, as shown in Fig. 2. A separate channel 5 is individually provided for each compartment 4, so that a gas or other fluid can be supplied separately and individually to each of the compartments 4 to inflate it. The channels 5 are separated by walls 6a which extend radially from the inner tube 8 to the outer tube 6. To supply fluid to each compartment 4, suitable respective openings 9 are formed in the outer tube 6.
When this catheter 1 is inserted into a vessel A and is advanced to a bifurcation or other juncture in vessel A, the tip of the catheter 1 can be aligned in the desired direction and ~0 ~;
conducted down the desired branch vessel by selectively inflating one or more of the compartments 4.
Specifically, if, as shown in Fig. 3, inflation fluid is supplied to the compartment 4 that is adjacent the bottom inside wall of the vessel A, when the inflated bottom side of the balloon 2 contacts the inside wall of the vessel A, the tip of the catheter 1 will be lifted and aligned with the branch that is diagonally above the bifurcation point. Therefore, the catheter 1 can be introduced into the branch vessel Al by inserting it farther.
On the other hand, as shown in Fig 4, if the compartment 4 adjacent the top inside wall of the vessel A
is inflated, the top side of the balloon 2 contacts the 1~ inside wall of vessel A and the tip of the catheter 1 will be forced down and aligned with the branch that is diagonally below the bifurcation point. In this way the catheter 1 can be introduced into the branch vessel A2 by inserting it farther. The angle of orientation of the tip of the catheter 1 can thus be freely adjusted by controlling the amount by which each compartment 4 is inflated in each of the above situations. The orientation and direction of the catheter 1 can be freely adjusted by appropriately inflating a single one of the multiple compartments 4 or by appropriately inflating two or more of the multiple compartments 4 at the same time.
If all the compartments 4 are inflated simultaneously, the balloon 2 is used to occlude to vessel A.
Fig. 5 is a cross section of an alternative embodiment of catheter 1. It differs from the embodiment previously described in that multiple balloons 2 are located in the radial direction along the catheter 1, and fluid supply channels 5 are provided for inflating such balloons individually and separately.
As with the previous embodiment, the catheter tip can be aligned in the desired direction and conducted down the desired branch vessel by selectively inflating one or more of the balloons when the catheter tip reaches the bifurcation in the vessel.
A catheter according to the present invention is not limited to the above embodiments, however, and may be constructed, for example, with multiple individual tubes for each of the required fluid supply channels, and the construction may be changed by increasing the number of compartments and balloons without changing the intent and function of the invention.
The present invention is also suited for use as an endoscope catheter in which an imaging fiber is embedded in the catheter, a laser illumination catheter in which a laser conducting fiber is imbedded in the catheter, and other types of catheters.
A catheter according to the present invention offers the benefit of being easily conducted to the target site, because the catheter can be aligned in any deisred direction at any desired angle by selectively inflating any of multiple compartments inside a balloon or by selectively inflating any of multiple balloons. In addition, the additional benefit of being able to achieve a small diameter catheter is provided because the construction is simple.
Although the present invention has been fully described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is to be noted that various changes and modifications are apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart thereform.
When this catheter 1 is inserted into a vessel A and is advanced to a bifurcation or other juncture in vessel A, the tip of the catheter 1 can be aligned in the desired direction and ~0 ~;
conducted down the desired branch vessel by selectively inflating one or more of the compartments 4.
Specifically, if, as shown in Fig. 3, inflation fluid is supplied to the compartment 4 that is adjacent the bottom inside wall of the vessel A, when the inflated bottom side of the balloon 2 contacts the inside wall of the vessel A, the tip of the catheter 1 will be lifted and aligned with the branch that is diagonally above the bifurcation point. Therefore, the catheter 1 can be introduced into the branch vessel Al by inserting it farther.
On the other hand, as shown in Fig 4, if the compartment 4 adjacent the top inside wall of the vessel A
is inflated, the top side of the balloon 2 contacts the 1~ inside wall of vessel A and the tip of the catheter 1 will be forced down and aligned with the branch that is diagonally below the bifurcation point. In this way the catheter 1 can be introduced into the branch vessel A2 by inserting it farther. The angle of orientation of the tip of the catheter 1 can thus be freely adjusted by controlling the amount by which each compartment 4 is inflated in each of the above situations. The orientation and direction of the catheter 1 can be freely adjusted by appropriately inflating a single one of the multiple compartments 4 or by appropriately inflating two or more of the multiple compartments 4 at the same time.
If all the compartments 4 are inflated simultaneously, the balloon 2 is used to occlude to vessel A.
Fig. 5 is a cross section of an alternative embodiment of catheter 1. It differs from the embodiment previously described in that multiple balloons 2 are located in the radial direction along the catheter 1, and fluid supply channels 5 are provided for inflating such balloons individually and separately.
As with the previous embodiment, the catheter tip can be aligned in the desired direction and conducted down the desired branch vessel by selectively inflating one or more of the balloons when the catheter tip reaches the bifurcation in the vessel.
A catheter according to the present invention is not limited to the above embodiments, however, and may be constructed, for example, with multiple individual tubes for each of the required fluid supply channels, and the construction may be changed by increasing the number of compartments and balloons without changing the intent and function of the invention.
The present invention is also suited for use as an endoscope catheter in which an imaging fiber is embedded in the catheter, a laser illumination catheter in which a laser conducting fiber is imbedded in the catheter, and other types of catheters.
A catheter according to the present invention offers the benefit of being easily conducted to the target site, because the catheter can be aligned in any deisred direction at any desired angle by selectively inflating any of multiple compartments inside a balloon or by selectively inflating any of multiple balloons. In addition, the additional benefit of being able to achieve a small diameter catheter is provided because the construction is simple.
Although the present invention has been fully described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is to be noted that various changes and modifications are apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart thereform.
Claims (2)
1. A catheter comprising:
a tube sized so as to be capable of being inserted into a vessel of the human body, said tube having partitions for dividing said tube into a plurality of channels for carrying a first fluid, said tube having a tip disposed at an end thereof;
a balloon disposed about said tip of said tube, said balloon including radial walls defining multiple compartments, said compartments being disposed between said walls inside of said balloon, each compartment corresponding to a respective channel of said tube, said balloon compartments further including separation walls defined by said tube for separating said compartments from corresponding channels, each said separation wall having an opening so that each compartment can be selectively inflated by directing fluid into a corresponding channel and through said opening enabling the position of said catheter to be controlled by contact with a wall of said vessel.
a tube sized so as to be capable of being inserted into a vessel of the human body, said tube having partitions for dividing said tube into a plurality of channels for carrying a first fluid, said tube having a tip disposed at an end thereof;
a balloon disposed about said tip of said tube, said balloon including radial walls defining multiple compartments, said compartments being disposed between said walls inside of said balloon, each compartment corresponding to a respective channel of said tube, said balloon compartments further including separation walls defined by said tube for separating said compartments from corresponding channels, each said separation wall having an opening so that each compartment can be selectively inflated by directing fluid into a corresponding channel and through said opening enabling the position of said catheter to be controlled by contact with a wall of said vessel.
2. A catheter as claimed in claim 1 wherein inside of said tube is disposed a second tube used as a channel for carrying a supply of drugs to a predetermined location within the vessel.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP89906458A EP0377749B1 (en) | 1988-06-06 | 1989-06-06 | Catheter |
| DE68917895T DE68917895T2 (en) | 1988-06-06 | 1989-06-06 | CATHETER. |
| PCT/JP1989/000575 WO1989011889A1 (en) | 1988-06-06 | 1989-06-06 | Catheter |
| US08/024,864 US5308323A (en) | 1988-06-06 | 1989-06-06 | Multiple compartment balloon catheter |
| CA000609797A CA1337792C (en) | 1988-06-06 | 1989-08-30 | Catheter |
| CN89107131.8A CN1049974A (en) | 1988-06-06 | 1989-09-07 | Catheter |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7490688U JPH01178053U (en) | 1988-06-06 | 1988-06-06 | |
| PCT/JP1989/000575 WO1989011889A1 (en) | 1988-06-06 | 1989-06-06 | Catheter |
| CA000609797A CA1337792C (en) | 1988-06-06 | 1989-08-30 | Catheter |
| CN89107131.8A CN1049974A (en) | 1988-06-06 | 1989-09-07 | Catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1337792C true CA1337792C (en) | 1995-12-26 |
Family
ID=27168438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000609797A Expired - Fee Related CA1337792C (en) | 1988-06-06 | 1989-08-30 | Catheter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5308323A (en) |
| EP (1) | EP0377749B1 (en) |
| CN (1) | CN1049974A (en) |
| CA (1) | CA1337792C (en) |
| DE (1) | DE68917895T2 (en) |
| WO (1) | WO1989011889A1 (en) |
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-
1989
- 1989-06-06 US US08/024,864 patent/US5308323A/en not_active Expired - Fee Related
- 1989-06-06 WO PCT/JP1989/000575 patent/WO1989011889A1/en active IP Right Grant
- 1989-06-06 EP EP89906458A patent/EP0377749B1/en not_active Expired - Lifetime
- 1989-06-06 DE DE68917895T patent/DE68917895T2/en not_active Expired - Fee Related
- 1989-08-30 CA CA000609797A patent/CA1337792C/en not_active Expired - Fee Related
- 1989-09-07 CN CN89107131.8A patent/CN1049974A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0377749B1 (en) | 1994-08-31 |
| DE68917895D1 (en) | 1994-10-06 |
| DE68917895T2 (en) | 1995-02-02 |
| EP0377749A4 (en) | 1990-12-19 |
| CN1049974A (en) | 1991-03-20 |
| WO1989011889A1 (en) | 1989-12-14 |
| EP0377749A1 (en) | 1990-07-18 |
| US5308323A (en) | 1994-05-03 |
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