CA2160408C - Suction catheter - Google Patents
Suction catheter Download PDFInfo
- Publication number
- CA2160408C CA2160408C CA002160408A CA2160408A CA2160408C CA 2160408 C CA2160408 C CA 2160408C CA 002160408 A CA002160408 A CA 002160408A CA 2160408 A CA2160408 A CA 2160408A CA 2160408 C CA2160408 C CA 2160408C
- Authority
- CA
- Canada
- Prior art keywords
- lumen
- catheter
- discharge
- coupled
- pressure
- 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 - Lifetime
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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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
-
- 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/84—Drainage tubes; Aspiration tips
- A61M1/85—Drainage tubes; Aspiration tips with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants
-
- 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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
- A61M2025/0073—Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow
-
- 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
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
- A61M25/008—Strength or flexibility characteristics of the catheter tip
Abstract
The invention relates to a suction catheter comprising a tube-like basic body with a distal and a proximal end, and a pressure channel and a discharge channel formed therein. At the distal end the pressure channel is connected with a spray nozzle and the discharge channel with a suction inlet and at the proximal end the channels are connected to connecting members, wherein the basic body in cross-section has a substantially constant cross-section with a lumen forming the discharge channel and the pressure channel has been formed in a separate tube-like body which has been received inside that lumen.
Description
SUCTION CATHETER
The invention relates to a suction catheter of the type as described in U.S. Patent No. 5,453,088.
A drawback of this suction catheter is that it tends to buckle quite easily under certain circumstances, as a result of which it ceases to function.
The present invention is directed towards the provision of a suction catheter of this type which does not suffer this problem.
It has become apparent that the unfavourable buckling behaviour of the known catheter is due to the asymmetrical cross-section of the basic body.
In accordance with one aspect of the present invention, there is provided a suction catheter for removing a substance from a body vessel, comprising:
an elongated catheter tube having a proximal end, a distal end, and a defining a catheter lumen extending between said proximal and distal ends;
a segarate pressure tube received within said catheter lumen and a portion of said catheter lumen defining a discharge lumen, said pressure tube being coupled in fluid communication with a nozzle, and said discharge lumen being coupled in fluid communication with a suction inlet, the nozzle and suction inlet being disposed proximate to said distal end of said catheter body, and a separate guidewire tube received within said catheter lumen and defining a guidewire lumen adapted to slidingly accept a guidewire, the guidewire tube being out of fluid communication with said pressure tube;
wherein said pressure tube is adapted to direct a pressurized fluid through said nozzle, said pressurized i fluid tending to cause said pressure tube to bend slightly when flowing through said pressure tube, and wherein said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet flow through said discharge lumen, thereby removing said substance from said body vessel, said catheter lumen being larger than the combined cross-sectional areas of said pressure tube and said guidewire tube, and wherein said catheter lumen is sufficiently larger that a portion of said separate pressure tube is free to adjust slightly within the catheter lumen, such that the catheter body tends not to bend when the pressurized fluid flows through the pressure tube.
With the catheter according to the invention the buckling behaviour is only defined by the basic body.
The separate tube-like body lies more or less free inside the lumen of the basic body and does not influence the buckling behaviour. Consequently the catheter according to the invention has a constant bending stiffness in all directions which is conducive to the prevention of buckling behaviour.
By using separate tube-like bodies for both the pressure channel and the guide wire channel, available cross-sections of the lumen of the basic body are used most effectively, as a result of which even with small diameters of the suction catheter, there is enough cross-section left to function as discharge channel. Also the second separate tube-like body lies substantially free inside the lumen of the basic body, so that this does not influence the bending performance of the catheter.
A suitable, easy to handle embodiment of the catheter according to the invention comprises a trifurcation at the proximal end with one outlet at the distal side to which the basic body has been connected I
2a and three separate outlets at the proximal side for the guide wire channel, the pressure channel and the discharge channel respectively.
The outlet to the guide wire channel may be provided with a haemostatic valve. As a result, no separate provision for haemostasis is required, so that a manageable unit is obtained.
The outlets of the pressure channel and the discharge channel may be provided with Luer-lock adapters. The trifurcation can form the extreme proximal part of the catheter which means the catheter does not need to comprise any further tube sections for the connection of the different channels.
The trifurcation may be manufactured in such a way that the discharge channel extends in a straight line and the guide wire channel and the pressure channel extend laterally, parallel to each other at an oblique angle away from the discharge channel.
A connecting channel may be formed between the pressure channel and the discharge channel in the trifurcation which debouches into the discharge channel by means of a spray nozzle directed in the proximal direction. The integrated spray nozzle forms a liquid jet pump, as a result of which the suction action in the distal end of the catheter will be reinforced. Thus, even when the basic body has a very small diameter, sufficient suction can be created without the need for an additional suction pump.
The basic body may be made up of a relatively stiff proximal section and a relatively pliable distal section, with the at least one separate tube-like member consisting of one continuous unit. As the pressure channel and if necessary the guide wire channel have been formed in separate tube-like bodies, it is not difficult 2b to assemble the basic body from a relatively stiff part and a relatively pliant part during the manufacturing process. Only the basic body parts need to be connected to each other. The other tube-like members extend continuously. Thus a catheter can be made which is capable of reaching more tortuous blood vessels.
The invention will be explained in greater detail in the following description with reference to the attached drawings.
~G~~~JB
The invention relates to a suction catheter of the type as described in U.S. Patent No. 5,453,088.
A drawback of this suction catheter is that it tends to buckle quite easily under certain circumstances, as a result of which it ceases to function.
The present invention is directed towards the provision of a suction catheter of this type which does not suffer this problem.
It has become apparent that the unfavourable buckling behaviour of the known catheter is due to the asymmetrical cross-section of the basic body.
In accordance with one aspect of the present invention, there is provided a suction catheter for removing a substance from a body vessel, comprising:
an elongated catheter tube having a proximal end, a distal end, and a defining a catheter lumen extending between said proximal and distal ends;
a segarate pressure tube received within said catheter lumen and a portion of said catheter lumen defining a discharge lumen, said pressure tube being coupled in fluid communication with a nozzle, and said discharge lumen being coupled in fluid communication with a suction inlet, the nozzle and suction inlet being disposed proximate to said distal end of said catheter body, and a separate guidewire tube received within said catheter lumen and defining a guidewire lumen adapted to slidingly accept a guidewire, the guidewire tube being out of fluid communication with said pressure tube;
wherein said pressure tube is adapted to direct a pressurized fluid through said nozzle, said pressurized i fluid tending to cause said pressure tube to bend slightly when flowing through said pressure tube, and wherein said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet flow through said discharge lumen, thereby removing said substance from said body vessel, said catheter lumen being larger than the combined cross-sectional areas of said pressure tube and said guidewire tube, and wherein said catheter lumen is sufficiently larger that a portion of said separate pressure tube is free to adjust slightly within the catheter lumen, such that the catheter body tends not to bend when the pressurized fluid flows through the pressure tube.
With the catheter according to the invention the buckling behaviour is only defined by the basic body.
The separate tube-like body lies more or less free inside the lumen of the basic body and does not influence the buckling behaviour. Consequently the catheter according to the invention has a constant bending stiffness in all directions which is conducive to the prevention of buckling behaviour.
By using separate tube-like bodies for both the pressure channel and the guide wire channel, available cross-sections of the lumen of the basic body are used most effectively, as a result of which even with small diameters of the suction catheter, there is enough cross-section left to function as discharge channel. Also the second separate tube-like body lies substantially free inside the lumen of the basic body, so that this does not influence the bending performance of the catheter.
A suitable, easy to handle embodiment of the catheter according to the invention comprises a trifurcation at the proximal end with one outlet at the distal side to which the basic body has been connected I
2a and three separate outlets at the proximal side for the guide wire channel, the pressure channel and the discharge channel respectively.
The outlet to the guide wire channel may be provided with a haemostatic valve. As a result, no separate provision for haemostasis is required, so that a manageable unit is obtained.
The outlets of the pressure channel and the discharge channel may be provided with Luer-lock adapters. The trifurcation can form the extreme proximal part of the catheter which means the catheter does not need to comprise any further tube sections for the connection of the different channels.
The trifurcation may be manufactured in such a way that the discharge channel extends in a straight line and the guide wire channel and the pressure channel extend laterally, parallel to each other at an oblique angle away from the discharge channel.
A connecting channel may be formed between the pressure channel and the discharge channel in the trifurcation which debouches into the discharge channel by means of a spray nozzle directed in the proximal direction. The integrated spray nozzle forms a liquid jet pump, as a result of which the suction action in the distal end of the catheter will be reinforced. Thus, even when the basic body has a very small diameter, sufficient suction can be created without the need for an additional suction pump.
The basic body may be made up of a relatively stiff proximal section and a relatively pliable distal section, with the at least one separate tube-like member consisting of one continuous unit. As the pressure channel and if necessary the guide wire channel have been formed in separate tube-like bodies, it is not difficult 2b to assemble the basic body from a relatively stiff part and a relatively pliant part during the manufacturing process. Only the basic body parts need to be connected to each other. The other tube-like members extend continuously. Thus a catheter can be made which is capable of reaching more tortuous blood vessels.
The invention will be explained in greater detail in the following description with reference to the attached drawings.
~G~~~JB
Fig. 1 shows a partly broken away and cross-sectional view of a catheter according to a first embodiment of the invention.
Fig. 2 shows a trifurcation caf a catheter according to the invention in a prefers°ed embodiment.
In fig. 1 the distal end and the proximal end of the catheter 1 haue been shown. The intermediate section has been indicated with a dash~:d and dotted line.
The catheter 1 has a tube-like basic body 2 with a substantially circular cross-section. At the proximal end a trifurcation 15 has been farmed, in which several channels, to be described later, are brought together. At the distal end an opening 7 has been formed in the basic body 2. This opening 7 for°ms a suction inlet which is connected with the lumen 3.
In the lumen 3 a first separate tube-like body 4 has been received. It extends from true proximal end to the distal end. In the tube-like body 4 a channel 5 has been defined which comprises a bent back section 6 in the distal end and ends in a jet nozzle. Liquid under pressure, supplied via channel 5 can thus be directed as a liquid jet 8 along the opening 7, as a result of which a suction will be created indicated by arrow 9.
The trifurcation 15 comprise: a first branch 17 which forms an inlet for the pressure channel 5. Inside this branch 17 a tube section 20 has been fixed which is connected to a source of liquid under pressure.
A second branch 18 of the trifurcation 15 forms the connection with the lumen 3 and functions <~s the discharge channel of the catheter. With the branch 18 a tube section 25 is connected which can be connected to a collecting reservoir.
The third branch 19 is also connected with a tube section 32 and forms a connection with a second 3!5 separate tube-like body 30 inside the lumen 3. This tube-like body 30 forms a channel for a guide wire 33. The tube-like body 30 has been fed through as far as the distal end of the catheter 1 and has been received with its circumference sealed in the rounded front wall of the distal end. Thus the guide wire 33 can extend over the entire length through the catheter and be pushed out of the front of the catheter at the opening 31. The catheter can thus be passed over the guide wire 33.
As can be seen clearly, a branch 21 of the pressure connection 20 has been received in the trifurcation 15. Thin branch 21 debauches into the discharge channel 24 with a spray nozzle 22 which is directed in the proximal direction. The liquid under pressure supplied via the pressure line 20 flows partly through the branch 21. and forms a liquid jet indicated with arrow 23 which, as seen in fig. 1, is aimed towards the right. Thus a liquid jet pump is fcarmed in the discharge channel 24 which creates additional suction in the channel 24. Even in the case of a small diameter of the basic body 2 and hence a relatively small cross-section of the area of the lumen 3 ava~.lable for the discharge channel, sufficient suction can be created at the opening 7.
As the tubes 4 and 30 are different members which have been received substantially free in the basic body 2, they influence the bending performance of the basic body at the most to a very limited degree. Because of the symmetrical cross-section of the basic body 2 there is no preferred direction as far as bending is concerned so that the basic body is not. sensitive to buckling.
Although not shown in the figure, the catheter 3~3 according to the invention can in a suitable manner be manufactured in such a way that the basic body 2 will be made up of a relatively bending-stiff proximal section and a relatively pliable distal section. Manufacturing such a catheter is relatively simple as the tube-like bodies 30 and 4 do not need to be interrupted. Only one weld needs to be made between the two tube-like sections making up the basic body 2. A catheter manufactured in this way has consequently a more pliable distal end-section as a result of which more tortuous blood vessels can be reached.
The same reference numbers have been used for corresponding parts in fig. 1 and fig. 2.
Fig. 2 shows a trifurcation caf a catheter according to the invention in a prefers°ed embodiment.
In fig. 1 the distal end and the proximal end of the catheter 1 haue been shown. The intermediate section has been indicated with a dash~:d and dotted line.
The catheter 1 has a tube-like basic body 2 with a substantially circular cross-section. At the proximal end a trifurcation 15 has been farmed, in which several channels, to be described later, are brought together. At the distal end an opening 7 has been formed in the basic body 2. This opening 7 for°ms a suction inlet which is connected with the lumen 3.
In the lumen 3 a first separate tube-like body 4 has been received. It extends from true proximal end to the distal end. In the tube-like body 4 a channel 5 has been defined which comprises a bent back section 6 in the distal end and ends in a jet nozzle. Liquid under pressure, supplied via channel 5 can thus be directed as a liquid jet 8 along the opening 7, as a result of which a suction will be created indicated by arrow 9.
The trifurcation 15 comprise: a first branch 17 which forms an inlet for the pressure channel 5. Inside this branch 17 a tube section 20 has been fixed which is connected to a source of liquid under pressure.
A second branch 18 of the trifurcation 15 forms the connection with the lumen 3 and functions <~s the discharge channel of the catheter. With the branch 18 a tube section 25 is connected which can be connected to a collecting reservoir.
The third branch 19 is also connected with a tube section 32 and forms a connection with a second 3!5 separate tube-like body 30 inside the lumen 3. This tube-like body 30 forms a channel for a guide wire 33. The tube-like body 30 has been fed through as far as the distal end of the catheter 1 and has been received with its circumference sealed in the rounded front wall of the distal end. Thus the guide wire 33 can extend over the entire length through the catheter and be pushed out of the front of the catheter at the opening 31. The catheter can thus be passed over the guide wire 33.
As can be seen clearly, a branch 21 of the pressure connection 20 has been received in the trifurcation 15. Thin branch 21 debauches into the discharge channel 24 with a spray nozzle 22 which is directed in the proximal direction. The liquid under pressure supplied via the pressure line 20 flows partly through the branch 21. and forms a liquid jet indicated with arrow 23 which, as seen in fig. 1, is aimed towards the right. Thus a liquid jet pump is fcarmed in the discharge channel 24 which creates additional suction in the channel 24. Even in the case of a small diameter of the basic body 2 and hence a relatively small cross-section of the area of the lumen 3 ava~.lable for the discharge channel, sufficient suction can be created at the opening 7.
As the tubes 4 and 30 are different members which have been received substantially free in the basic body 2, they influence the bending performance of the basic body at the most to a very limited degree. Because of the symmetrical cross-section of the basic body 2 there is no preferred direction as far as bending is concerned so that the basic body is not. sensitive to buckling.
Although not shown in the figure, the catheter 3~3 according to the invention can in a suitable manner be manufactured in such a way that the basic body 2 will be made up of a relatively bending-stiff proximal section and a relatively pliable distal section. Manufacturing such a catheter is relatively simple as the tube-like bodies 30 and 4 do not need to be interrupted. Only one weld needs to be made between the two tube-like sections making up the basic body 2. A catheter manufactured in this way has consequently a more pliable distal end-section as a result of which more tortuous blood vessels can be reached.
The same reference numbers have been used for corresponding parts in fig. 1 and fig. 2.
5 Just like trifurcation 15, tx°ifurcation 40 has been attached by means of injection moulding to the basic body 2, in which the tube-like bodies ~~ and 30 have already been received.
The basic body 2, made up of the tube-like bodies 4 and 30, is placed in a suitab:l.y shaped mould and the protruding tube sections 4 and 30 are placed in the desired position. The required spaces, in particular those for forming the channel sections, are kept open by means of core pins which connect to th~~ tube-hike bodies and the basic body. A. tube section 41 is also received in the mould and thus embedded in the trifurcation 40. This tube section 4:L has the same function 4~s the branch 21 in fig. 1.
As fig. 2 shows, the tree-way furcat:ion 40 has been manufactured in such a way that the discharge channel extends in a straight line to a branch 42. The pressure channel 5 and the guide wire channel .in the tube-like body 30, ar_e received in the branches 43 and 44 of the trifurcation 40 respectively, wrEich extend laterally, parallel to each other at an oblique angle away from the discharge channel.
The branch 44 in which the tube-like body 30 has been received, is provided with a, as such known, haemostatic valve 45 at its free end. l.n this way a guide wire can be introduced and removed directly via the branch 44 of the trifurcat.ion, without a need for any additional haemostatic provisions.
The branch 42 of the discharge channel and the branch 43 of the pressure channel are k5oth provided with male Luer-lock adapters 46 and 47 respectively.
Consequently the suction catheter according to the invention provided with the trifurcatic~n 40 has a very compact construction and is easy to handle.
The basic body 2, made up of the tube-like bodies 4 and 30, is placed in a suitab:l.y shaped mould and the protruding tube sections 4 and 30 are placed in the desired position. The required spaces, in particular those for forming the channel sections, are kept open by means of core pins which connect to th~~ tube-hike bodies and the basic body. A. tube section 41 is also received in the mould and thus embedded in the trifurcation 40. This tube section 4:L has the same function 4~s the branch 21 in fig. 1.
As fig. 2 shows, the tree-way furcat:ion 40 has been manufactured in such a way that the discharge channel extends in a straight line to a branch 42. The pressure channel 5 and the guide wire channel .in the tube-like body 30, ar_e received in the branches 43 and 44 of the trifurcation 40 respectively, wrEich extend laterally, parallel to each other at an oblique angle away from the discharge channel.
The branch 44 in which the tube-like body 30 has been received, is provided with a, as such known, haemostatic valve 45 at its free end. l.n this way a guide wire can be introduced and removed directly via the branch 44 of the trifurcat.ion, without a need for any additional haemostatic provisions.
The branch 42 of the discharge channel and the branch 43 of the pressure channel are k5oth provided with male Luer-lock adapters 46 and 47 respectively.
Consequently the suction catheter according to the invention provided with the trifurcatic~n 40 has a very compact construction and is easy to handle.
Claims (12)
1. ~A suction catheter for removing a substance from a body vessel, comprising:
an elongated catheter tube having a proximal end, a distal end, and a defining a catheter lumen extending between said proximal and distal ends;
a separate pressure tube received within said catheter lumen and a portion of said catheter lumen defining a discharge lumen, said pressure tube being coupled in fluid communication with a nozzle, and said discharge lumen being coupled in fluid communication with a suction inlet, the nozzle and suction inlet being disposed proximate to said distal end of said catheter body, and a separate guidewire tube received within said catheter lumen and defining a guidewire lumen adapted to slidingly accept a guidewire, the guidewire tube being out of fluid communication with said pressure tube;
wherein said pressure tube is adapted to direct a pressurized fluid through said nozzle, said pressurized fluid tending to cause said pressure tube to bend slightly when flowing through said pressure tube, and wherein said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet flow through said discharge lumen, thereby removing said substance from said body vessel, said catheter lumen being larger than the combined cross-sectional areas of said pressure tube and said guidewire tube, and wherein said catheter lumen is sufficiently larger that a portion of said separate pressure tube is free to adjust slightly within the catheter lumen, such that the catheter body tends not to bend when the pressurized fluid flows through the pressure tube.
an elongated catheter tube having a proximal end, a distal end, and a defining a catheter lumen extending between said proximal and distal ends;
a separate pressure tube received within said catheter lumen and a portion of said catheter lumen defining a discharge lumen, said pressure tube being coupled in fluid communication with a nozzle, and said discharge lumen being coupled in fluid communication with a suction inlet, the nozzle and suction inlet being disposed proximate to said distal end of said catheter body, and a separate guidewire tube received within said catheter lumen and defining a guidewire lumen adapted to slidingly accept a guidewire, the guidewire tube being out of fluid communication with said pressure tube;
wherein said pressure tube is adapted to direct a pressurized fluid through said nozzle, said pressurized fluid tending to cause said pressure tube to bend slightly when flowing through said pressure tube, and wherein said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet flow through said discharge lumen, thereby removing said substance from said body vessel, said catheter lumen being larger than the combined cross-sectional areas of said pressure tube and said guidewire tube, and wherein said catheter lumen is sufficiently larger that a portion of said separate pressure tube is free to adjust slightly within the catheter lumen, such that the catheter body tends not to bend when the pressurized fluid flows through the pressure tube.
2. The suction catheter as set forth in claim 1, wherein said guidewire lumen has a distal opening disposed at the distal end of the catheter body, adapted to allow said guidewire to extend distally beyond the distal end of the catheter.
3. The suction catheter as set forth in claim 1 or 2, wherein said nozzle is directed in a proximal direction toward said discharge lumen.
4. The suction catheter as set forth in any one of claims 1 to 3, further comprising a pressure inlet disposed at a proximal end of said pressure tube, said pressure inlet having a coupling adapted to be coupled with a source of pressurized fluid which flows through said pressure tube and said nozzle, thereby creating a suction force disposed at the suction inlet tending to draw said substance into the suction inlet and through the discharge lumen.
5. The suction catheter as set forth in any one of claims 1 to 4, further comprising a discharge outlet disposed at a proximal end of the discharge lumen, said discharge outlet having a coupling adapted to be coupled with a discharge container for receiving said substance from the discharge lumen.
6. The suction catheter as set forth in any one of claims 1 to 5, further comprising a hub disposed at the proximal end of the catheter body, said hub having a pressure port coupled with a proximal end of the pressure tube, a discharge port coupled with a proximal end of the discharge lumen, and a guidewire port coupled with the guidewire lumen.
7. The suction catheter as set forth in claim 6, further comprising a hemostatic valve disposed at said guidewire port for preventing body fluids from escaping said guidewire lumen.
8. The suction catheter as set forth in claim 6 or 7, wherein said pressure port and said discharge port are provided with Luer-lock seals adapted to be coupled with a source of pressurized fluid and a discharge container, respectively.
9. The suction catheter as set forth in any one of claims 1 to 8, wherein said catheter body is formed with a relatively stiff proximal portion and a relatively flexible distal portion, thereby enabling the distal end of the catheter body to access more tortuous body vessels.
10. The catheter as set forth in claim 9, wherein said separate pressure tube is formed as an integral, unitary tube having a substantially constant stiffness.
11. A suction catheter for removing a substance from a body vessel, comprising:
an elongated catheter body having a proximal end, a distal end, and a catheter lumen extending between said proximal and distal ends;
a separate pressure tube received within said catheter lumen and a discharge lumen formed in said catheter body, said pressure tube being coupled with a nozzle and said discharge lumen being coupled with a suction inlet, the nozzle and suction inlet being disposed proximate to said distal end of said catheter body;
wherein said pressure tube is adapted to direct a pressurized fluid through said nozzle, and said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet and flow through said discharge lumen, thereby removing said substance from said body vessel, said pressurized fluid tending to cause said pressure tube to bend slightly when flowing through said pressure tube, said catheter lumen being larger than the cross-sectional area of said pressure tube, wherein said catheter lumen is sufficiently large that a portion of said separate pressure tube is free to adjust slightly in a radial direction within the catheter lumen, and wherein said separate pressure tube is of sufficient size to allow said pressure tube to move in said radial direction, such that the catheter body tends not to bend when the pressurized fluid flows through the pressure tube, a hub disposed at the proximal end of the catheter body, said hub having a pressure port coupled with a proximal end of the pressure tube, a discharge port coupled with a proximal end of the discharge lumen, and a guidewire port coupled with the guidewire lumen, wherein said pressure port has coupled adapted to be coupled with a source of pressurized fluid and said discharge port is adapted to be coupled to a discharge container, said hub having a flow directing member adapted to split a pressurized fluid flowing from said source, and to direct a first portion of said pressurized fluid to flow into said pressure tube and to direct a remainder of said pressurized fluid to flow into said discharge port, thereby encouraging said substance to flow from said discharge lumen into the discharge container.
an elongated catheter body having a proximal end, a distal end, and a catheter lumen extending between said proximal and distal ends;
a separate pressure tube received within said catheter lumen and a discharge lumen formed in said catheter body, said pressure tube being coupled with a nozzle and said discharge lumen being coupled with a suction inlet, the nozzle and suction inlet being disposed proximate to said distal end of said catheter body;
wherein said pressure tube is adapted to direct a pressurized fluid through said nozzle, and said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet and flow through said discharge lumen, thereby removing said substance from said body vessel, said pressurized fluid tending to cause said pressure tube to bend slightly when flowing through said pressure tube, said catheter lumen being larger than the cross-sectional area of said pressure tube, wherein said catheter lumen is sufficiently large that a portion of said separate pressure tube is free to adjust slightly in a radial direction within the catheter lumen, and wherein said separate pressure tube is of sufficient size to allow said pressure tube to move in said radial direction, such that the catheter body tends not to bend when the pressurized fluid flows through the pressure tube, a hub disposed at the proximal end of the catheter body, said hub having a pressure port coupled with a proximal end of the pressure tube, a discharge port coupled with a proximal end of the discharge lumen, and a guidewire port coupled with the guidewire lumen, wherein said pressure port has coupled adapted to be coupled with a source of pressurized fluid and said discharge port is adapted to be coupled to a discharge container, said hub having a flow directing member adapted to split a pressurized fluid flowing from said source, and to direct a first portion of said pressurized fluid to flow into said pressure tube and to direct a remainder of said pressurized fluid to flow into said discharge port, thereby encouraging said substance to flow from said discharge lumen into the discharge container.
12. A suction catheter for removing a substance from a body vessel, comprising:
an elongated catheter body having a proximal end and a distal end;
a pressure lumen and a discharge lumen formed within said catheter body, said pressure lumen being coupled with a nozzle and said discharge lumen being coupled with a suction inlet, the nozzle and suction inlet being disposed proximate to the distal end of the catheter body;
wherein said pressure lumen is adapted to direct a pressurized fluid through said nozzle, and said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet and flow through said discharge lumen, thereby removing said substance from said body vessel;
a guidewire lumen formed within said catheter body, said guidewire lumen being adapted to receive a guidewire; and a hub disposed at the proximal end of the catheter body, said hub having a pressure port coupled with a proximal end of the pressure lumen, a discharge port coupled with a proximal end of the discharge lumen, and a guidewire port coupled with the guidewire lumen;
wherein said pressure port is adapted to be coupled with a source of pressurized fluid, and said discharge port is adapted to be coupled to a discharge container, said hub further comprising a flow directing member adapted to split a pressurized fluid flowing from said source, and to direct a first portion of said pressurized fluid to flow into said pressure lumen and to direct a remainder of said pressurized fluid flow into said discharge port, thereby encouraging said substance to flow from said discharge lumen into the discharge container.
an elongated catheter body having a proximal end and a distal end;
a pressure lumen and a discharge lumen formed within said catheter body, said pressure lumen being coupled with a nozzle and said discharge lumen being coupled with a suction inlet, the nozzle and suction inlet being disposed proximate to the distal end of the catheter body;
wherein said pressure lumen is adapted to direct a pressurized fluid through said nozzle, and said suction inlet and discharge lumen are adapted to allow said substance to enter said suction inlet and flow through said discharge lumen, thereby removing said substance from said body vessel;
a guidewire lumen formed within said catheter body, said guidewire lumen being adapted to receive a guidewire; and a hub disposed at the proximal end of the catheter body, said hub having a pressure port coupled with a proximal end of the pressure lumen, a discharge port coupled with a proximal end of the discharge lumen, and a guidewire port coupled with the guidewire lumen;
wherein said pressure port is adapted to be coupled with a source of pressurized fluid, and said discharge port is adapted to be coupled to a discharge container, said hub further comprising a flow directing member adapted to split a pressurized fluid flowing from said source, and to direct a first portion of said pressurized fluid to flow into said pressure lumen and to direct a remainder of said pressurized fluid flow into said discharge port, thereby encouraging said substance to flow from said discharge lumen into the discharge container.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9401184A NL9401184A (en) | 1994-07-19 | 1994-07-19 | Suction catheter. |
| EP95201873A EP0693295B1 (en) | 1994-07-19 | 1995-07-07 | Suction catheter |
| US08/504,203 US5713849A (en) | 1994-07-19 | 1995-07-19 | Suction catheter and method |
| CA002160408A CA2160408C (en) | 1994-07-19 | 1995-10-12 | Suction catheter |
| JP7267197A JPH09108332A (en) | 1994-07-19 | 1995-10-16 | Aspirating catheter |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9401184A NL9401184A (en) | 1994-07-19 | 1994-07-19 | Suction catheter. |
| US08/504,203 US5713849A (en) | 1994-07-19 | 1995-07-19 | Suction catheter and method |
| CA002160408A CA2160408C (en) | 1994-07-19 | 1995-10-12 | Suction catheter |
| JP7267197A JPH09108332A (en) | 1994-07-19 | 1995-10-16 | Aspirating catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2160408A1 CA2160408A1 (en) | 1997-04-13 |
| CA2160408C true CA2160408C (en) | 2007-04-03 |
Family
ID=27427257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002160408A Expired - Lifetime CA2160408C (en) | 1994-07-19 | 1995-10-12 | Suction catheter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5713849A (en) |
| EP (1) | EP0693295B1 (en) |
| JP (1) | JPH09108332A (en) |
| CA (1) | CA2160408C (en) |
| NL (1) | NL9401184A (en) |
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-
1994
- 1994-07-19 NL NL9401184A patent/NL9401184A/en not_active Application Discontinuation
-
1995
- 1995-07-07 EP EP95201873A patent/EP0693295B1/en not_active Expired - Lifetime
- 1995-07-19 US US08/504,203 patent/US5713849A/en not_active Expired - Lifetime
- 1995-10-12 CA CA002160408A patent/CA2160408C/en not_active Expired - Lifetime
- 1995-10-16 JP JP7267197A patent/JPH09108332A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09108332A (en) | 1997-04-28 |
| NL9401184A (en) | 1996-03-01 |
| EP0693295B1 (en) | 2002-09-25 |
| CA2160408A1 (en) | 1997-04-13 |
| US5713849A (en) | 1998-02-03 |
| EP0693295A1 (en) | 1996-01-24 |
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| EEER | Examination request | ||
| MKEX | Expiry |
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