Catheter and method for the prevention and/or treatment of stenotic processes of vessels and cavities
First Claim
1. A catheter device for treating a living body having a treatable surface, comprising:
- (a) an elongated flexible shaft having a proximal end and a distal end;
(b) a catheter tip having a proximal end and a distal end, said proximal catheter tip end being joined to said catheter distal shaft end;
(c) said tip comprising at least two spaced, inflatable cheer balloons which, when inflated in said body serve to form a treatment site in the space formed between said chamber balloons;
(d) an inflatable treatment balloon consisting essentially of an inflatable, porous material, said treatment balloon being disposed on said tip and positioned between said spaced cheer balloons;
(e) means associated with said inflatable treatment balloon for treating said treatment site when said chamber and treatment balloons are inflated, said treatment means comprising a material having a structure substantially similar to the physiological structure of said surface of said body;
(f) flushing means for (i) supplying material to and/or (ii) removing fluid and/or debris from said chamber; and
,(g) means for allowing flow of body fluid from the proximal side to the distal side of said catheter tip when any of said balloons is in an inflated state.
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Accused Products
Abstract
A catheter for preventing the stenosis or restenosis of a body vessel or cavity, e.g., a blood vessel, whereby a membrane may be applied to the inner surface of the vessel or cavity. The inventive catheter tip utilizes (a) two inflatable chamber balloons which, when inflated, isolate a portion of the vessel or cavity for treatment and (b) an inflatable treatment balloon disposed between the two chamber balloons which provides a means for treating the isolated site. The invention permits the flow of body fluid, e.g., blood, to the distal side of the catheter tip while the balloons are in an inflated state. The invention further permits the rinsing and flushing of fluids or medications of an isolated longitudinal portion of the vessel or cavity prior to and after an application of a membrane located on the treatment balloon. The invention is useful for the prevention of restenosis of a blood vessel after PTA, PTCA or atherectomy or like procedures, or more generally for the treatment of any cavity requiring a membrane, film or coating.
395 Citations
44 Claims
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1. A catheter device for treating a living body having a treatable surface, comprising:
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(a) an elongated flexible shaft having a proximal end and a distal end; (b) a catheter tip having a proximal end and a distal end, said proximal catheter tip end being joined to said catheter distal shaft end; (c) said tip comprising at least two spaced, inflatable cheer balloons which, when inflated in said body serve to form a treatment site in the space formed between said chamber balloons; (d) an inflatable treatment balloon consisting essentially of an inflatable, porous material, said treatment balloon being disposed on said tip and positioned between said spaced cheer balloons; (e) means associated with said inflatable treatment balloon for treating said treatment site when said chamber and treatment balloons are inflated, said treatment means comprising a material having a structure substantially similar to the physiological structure of said surface of said body; (f) flushing means for (i) supplying material to and/or (ii) removing fluid and/or debris from said chamber; and
,(g) means for allowing flow of body fluid from the proximal side to the distal side of said catheter tip when any of said balloons is in an inflated state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A catheter device for treating a living body having a treatable surface, comprising:
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(a) an elongated flexible shaft having a proximal end and a distal end; (b) a catheter tip having a proximal end and a distal end, said proximal catheter tip end being joined to said catheter distal shaft end; (c) said tip comprising at least two spaced, inflatable chamber balloons adapted to form a space between said chamber balloons when said chamber balloons are inflated; (d) an inflatable treatment balloon having an exterior wall surface, said treatment balloon consisting essentially of an inflatable, porous material and being disposed on said tip between said spaced chamber balloons; (e) a coating membrane releasably disposed on said exterior wall surface of said treatment balloon, said membrane releasable from said treatment balloon and maintainable on a body wall surface, said membrane comprising a material having a structure substantially similar to the physiological structure of said surface of said body; (f) means for displacing said membrane from the exterior wall surface of said treatment balloon when said catheter tip is inserted in a living body and said treatment balloon is inflated; (g) flushing means for (i) supplying material to and/or (ii) removing fluid and/or debris from said chamber; and
,(h) means for allowing flow of body fluid from the proximal side to the distal side of said catheter tip when any of said balloons is in an inflated state. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for preventing stenosis in a body vessel or cavity having an inner wall surface, said method comprising the steps of:
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(a) inserting a catheter tip having a proximal end and a distal end in a desired location along said inner wall surface; (b) providing said tip with at least two spaced inflatable chamber balloons and at least one treatment balloon located between said chamber balloons, said treatment balloon having an exterior wall surface and consisting essentially of an inflatable, porous material; (c) inflating said spaced chamber balloons to isolate a portion of said vessel or cavity between said spaced chamber balloons; (d) (i) supplying material to and/or (ii) removing fluid and/or debris from said isolated portion; (e) providing a treatment to said isolated portion of said vessel or cavity, said treatment having a structure substantially similar to the physiological structure of said surface of said vessel or cavity; (f) inflating said treatment balloon so as to provide said treatment to said isolated portion of said body vessel or cavity; and
,(g) allowing flow of body fluid from the proximal side to the distal side of said catheter tip when any of said balloons is in an inflated state. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 31, 36, 37, 42, 43, 44)
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30. A method for preventing stenosis in a body vessel or cavity having an inner wall surface, said method comprising the steps of:
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(a) inserting a catheter tip having a proximal end and a distal end to a desired location along said inner wall surface; (b) providing said tip with at least two spaced inflatable chamber balloons; (c) providing said tip with an inflatable treatment balloon having an exterior wall surface, said treatment balloon being disposed on said tip between said spaced chamber balloons and consisting essentially of an inflatable, porous material; (d) providing, on the exterior wall surface of said treatment balloon, a releasable membrane comprising a material having a structure substantially similar to the physiological structure of said surface of said vessel or cavity; (e) inflating said spaced chamber balloons to isolate a portion of said vessel or cavity between said spaced chamber balloons; (f) (i) supplying material to and/or (ii) removing fluid and/or debris from said isolated portion; (g) inflating said treatment balloon and displacing said membrane from the surface of said treatment balloon onto said body wall surface; (h) maintaining said membrane on said inner wall surface of said body vessel or cavity; and
,(i) allowing flow of body fluid from the proximal side to the distal side of said catheter tip when any of said balloons is in an inflated state. - View Dependent Claims (32, 33, 34, 35, 38, 39, 40, 41)
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Specification