Passive perfusion angioplasty catheter
First Claim
Patent Images
1. A passive perfusion angioplasty catheter comprising:
- an elongated flexible member defining an inflation lumen; and
inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining at least one passage between an exterior thereof and said interior surface of said arterial lumen for permitting blood to flow past said balloon means when said balloon means is pressed against said interior surface,said balloon means comprising at least one inflatable lobe, said at least one passage being a helical groove defined by said at least one lobe, a band being helically wound about a longitudinal axis of said balloon means, ends of said band being affixed to said flexible member, thereby defining a helical lobe and said helical groove.
0 Assignments
0 Petitions
Accused Products
Abstract
A passive perfusion angioplasty catheter is provided which includes an elongated flexible member defining an inflation lumen and an inflatable balloon member affixed to a distal end of the flexible member for pressing against an interior wall of an artery. The balloon member defines at least one passage between a surface thereof and the interior wall permitting blood to flow therethrough when the balloon member is pressed against the interior wall. A method of percutaneous transluminal angioplasty is also provided.
370 Citations
56 Claims
-
1. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member defining an inflation lumen; and inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining at least one passage between an exterior thereof and said interior surface of said arterial lumen for permitting blood to flow past said balloon means when said balloon means is pressed against said interior surface, said balloon means comprising at least one inflatable lobe, said at least one passage being a helical groove defined by said at least one lobe, a band being helically wound about a longitudinal axis of said balloon means, ends of said band being affixed to said flexible member, thereby defining a helical lobe and said helical groove. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member defining an inflation lumen; and inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining at least one passage between an exterior thereof and said interior surface of said arterial lumen for permitting blood to flow past said balloon means when said balloon means is pressed against said interior surface, said balloon means including a plurality of lobes defining first and second helical passages. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member defining an inflation lumen; and inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining at least one passage between an exterior thereof and said interior surface of said arterial lumen for permitting blood to flow past said balloon means when said balloon means is pressed against said interior surface, said balloon means comprising at least one inflatable lobe, said at least one passage being a helical groove defined by said at least one lobe, said balloon means comprises at least one inflatable lobe portion, said inflatable lobe portion being formed so as to have a material thickness less than remaining portions thereof, whereby during inflation of said balloon means, lobe portions distent to a greater extent than said remaining portions. - View Dependent Claims (18, 19, 20, 21, 22)
-
-
23. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member defining an inflation lumen; and inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining at least one passage between an exterior thereof and said interior surface of said arterial lumen for permitting blood to flow past said balloon means when said balloon means is pressed against said interior surface, said balloon means including a plurality of S-shaped pleats defined in the periphery thereof when said balloon means is in a relaxed state, each said pleat having a radius of curvature of 2.5 to 5 times a thickness of the balloon means material. - View Dependent Claims (24, 25, 26, 27, 28)
-
-
29. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member defining an inflation lumen; inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining a plurality of passages between an exterior thereof and said interior surface of said arterial lumen for permitting blood to flow past said balloon means when said balloon means is pressed against said interior surface, at least some of said passages being defined longitudinally and at least some of said passages being defined circumferentially, of said balloon means; and means defining a cavity, said cavity extending longitudinally of said balloon means and being disposed between said balloon means and said flexible member. - View Dependent Claims (30, 31, 32, 33)
-
-
34. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member having one of a core tube and cylinder and a concentric tube defining an inflation lumen; and inflatable balloon means, the distal end of which being affixed to the core tube while the proximal end is sealed to the concentric tube such that an interior of the balloon means being a continuation of the inflation lumen, the formed shape consisting of a pleated cylindrical balloon in which the pleats have a radius rc and the polymer has a thickness, δ
, and, as cast, the pleated balloon will, when collapsed onto a surface of the core tube of said flexible member give a deflated profile 4rc +δ
greater than a radius of said core tube of said flexible member, and when fully inflated will produce a smooth unpleated balloon surface with surface area approximately that of the cast pleated area. - View Dependent Claims (35, 36, 37, 38, 39, 40)
-
-
41. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member having one of a core tube and cylinder and a concentric tube defining an inflation lumen; and inflatable balloon means, the distal end of which being affixed to the core tube while the proximal end is sealed to the concentric tube such that an interior of the balloon means being a continuation of the inflation lumen, said balloon means distending the surrounding arterial walls while allowing an open passage to remain between a distended artery wall and one of a depressed groove and set of grooves formed by the balloon means allowing blood to flow past a surface of the balloon means, said balloon means being fabricated from a polymer having an elastic modulus substantially greater than arterial tissue and is thermally pressure formed to assume a desired shape upon inflation, the formed shape consisting of a partially pleated balloon in which the pleats have a radius rc and the polymer a thickness, δ
, as cast the pleated balloon will, when collapsed onto a surface of the interior tube of said flexible member give a deflated profile 4rc +δ
greater than a radius of said core tube of said flexible member, and when fully inflated will produce an unpleated balloon surface with surface area approximately that of the cast pleated area and with single or multiple grooves formed by the unpleated, undistended portion of a polymeric tube from which the balloon is blown. - View Dependent Claims (42, 43, 44)
-
-
45. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member having one of a core tube and cylinder and a concentric tube defining an inflation lumen; and a manifold connecting inflatable grooved balloon means, distal ends of which being affixed to the core tub while proximal ends thereof being sealed to the concentric tube by way of the manifold such that an interior of the balloon means is a continuation of the inflation lumen, said grooved balloon means distending surrounding arterial walls while allowing an open passage to remain between the distended artery wall and a depressed groove or set of grooves formed by the balloon means and valleys between the balloon means allowing blood to flow past the balloon means surface. - View Dependent Claims (46, 47, 48, 49)
-
-
50. A passive perfusion angioplasty catheter comprising:
-
an elongated flexible member having one of a core tube defining a lumen; and inflatable balloon means having one of a pleated and unpleated grooved balloon being blown into a mold thereof directly from the lumen, said balloon being sucked into the lumen and threaded to an occluded site where, upon being pressurized, the balloon evaginates forming a grooved balloon providing passive perfusion when opening tightly occluded vessels. - View Dependent Claims (51, 52)
-
-
53. A method of percutaneous transluminal angioplasty comprising the steps of:
-
providing a catheter having an elongated flexible member defining an inflation lumen and inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining at least one passage between an exterior thereof and said interior surface, said balloon means having a plurality of lobes defining first and second helical passages, said helical passages being defined by helically winding first and second bands about said balloon means, said first band being wound helically clockwise about a longitudinal axis of said balloon means, said second band being wound helically counterclockwise about the longitudinal axis of said balloon means, ends of said first and second bands being affixed to said flexible member, said first and second bands also defining said plurality of lobes; inserting said catheter into an artery so that said balloon means is disposed at point were blood flow is restricted; inflating and expanding said balloon means so that said balloon means presses against the interior surface of the arterial lumen to reduce a constriction in the artery; and permitting blood to flow in said at least one passage so as to flow past said balloon means. - View Dependent Claims (54)
-
-
55. A method of percutaneous transluminal angioplasty comprising the steps of:
-
providing a catheter having an elongated flexible member defining an inflation lumen and inflatable balloon means affixed to a distal end of said flexible member for pressing against an interior surface of an arterial lumen, said balloon means defining at least one passage between an exterior thereof and said interior surface, said balloon means having at least one inflatable lobe, said at least one passage being a helical groove defined by said at least one lobe, a band being helically wound about a longitudinal axis of said balloon means, ends of said band being affixed to said flexible member, thereby defining a helical lobe and helical groove; inserting said catheter into an artery so that said balloon means is disposed at point were blood flow is restricted; inflating and expanding said balloon means so that said balloon means presses against the interior surface of the arterial lumen to reduce a constriction in the artery; and permitting blood to flow in said at least one passage so as to flow past said balloon means. - View Dependent Claims (56)
-
Specification