METHOD AND APPARATUS FOR STENTING

• US 20120010690A1
• Filed: 09/20/2011
• Published: 01/12/2012
• Est. Priority Date: 03/13/2001
• Status: Abandoned Application

• Current Assignee: Medinol Limited (Medinol USA Incorporated)
• Original Assignee: Medinol Limited (Medinol USA Incorporated)
• Inventors: Richter, Yoram, Edelman, Elazer R.
• Application Number:
  US13/236,827
• Publication Number:
  US 20120010690A1
• Time in Patent Office: Days
• US Class Current: 623/1.2
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

Abstract

A method and apparatus to create a more favorable flow regime in a lumen. An artificial shape in the lumen is created to at least one of eliminate flow disturbances and enchance aspects of fluid flow through a treatment site.

Claims

1-60. -60. (canceled)

61. A stent for implantation in a lumen of a blood vessel, having a non-uniform shape of its envelope upon expansion, where the stent comprises:

a first and a second stent segments extending in the circumferential direction of the stent and being longitudinally offset with respect to each other;

a third stent segment configured to assume a tapered configuration in an expanded state of the stent;

a fourth stent segment connecting the first stent segment to the third stent segment;

a fifth stent segment connecting the third stent segment to the second stent segment;

wherein the fourth and fifth stent segments are configured to assume a tapered configuration in an expanded state of the stent and have diverging configurations.

62. The stent of claim 61, wherein said stent is a self-expanding stent.

63. The stent of claim 61, wherein first and second stent segments are provided with different cross-sectional areas as compared to one another.

64. The stent of claim 61, wherein the first, second and third stent segments are configured such that, in an expanded state thereof, the stent is frustoconical.

65. The stent of claim 61, wherein first and second stent segments are provided with the same cross-sectional areas as compared to one another.

66. The stent of claim 61, wherein said stent is a balloon-expandable stent and configured to be expanded by a delivery balloon to be asymmetrical with respect to the longitudinal axis of said stent.

67. The stent of claim 61, wherein said stent is a self-expanding stent having a symmetrical shape with respect to the longitudinal axis of said stent when delivered and self-expanded, and is configured to be further expanded by a balloon to be asymmetrical with respect to the longitudinal axis of said stent.

68. The stent of claim 61, wherein a cross section of any stent segment of the stent in a plane normal to a longitudinal axis thereof is circular.

69. A delivery balloon for deploying the stent of claim 61, the balloon being configured to be inflated for expanding the stent in a lumen such that, in an expanded state of the stent, the first stent segment has the first stent segment cross-sectional area, the second stent segment has the second stent segment cross-sectional area, the third stent segment having a third tapered stent configuration, the fourth stent segment having a fourth tapered stent configuration, and a fifth stent segment having a fifth tapered stent configuration.

70. The balloon of claim 69, wherein the balloon includes:

a first balloon segment configured to have a first balloon segment cross-sectional area in an inflated state of the balloon for expanding the first stent segment to the first stent segment cross-sectional area;

a second balloon segment longitudinally offset with respect to the first balloon segment and configured to have a second balloon segment cross-sectional area in an inflated state of the balloon for expanding the second stent segment to the second stent segment cross-sectional area;

a third balloon segment configured to assume a tapered balloon segment configuration in an inflated state of the balloon for expanding the third stent segment to a third tapered stent configuration;

a fourth balloon segment configured to assume a tapered balloon segment configuration in an inflated state of the balloon for expanding the fourth stent segment to a fourth tapered stent configuration; and

a fifth balloon segment configured to assume a tapered balloon segment configuration in an inflated state of the balloon for expanding the fifth stent segment to a fifth tapered stent configuration.

71. The balloon of claim 70, wherein the second balloon segment cross-sectional area is different from the first balloon segment cross-sectional area.

72. The balloon of claim 70, wherein the second balloon segment cross-sectional area is equal to the first balloon segment cross-sectional area.

73. A kit for deploying a stent comprising the stent of claim 61, the kit further including a delivery balloon configured to be inflated for expanding the stent in a lumen such that, in an expanded state of the stent, the first stent segment has the first stent segment cross-sectional area, the second stent segment has the second stent segment cross-sectional area, and the third, fourth and fifth stent segments assume tapered stent segment configurations.

74. The kit of claim 73, wherein the balloon includes:

a first balloon segment configured to have a first balloon segment cross-sectional area in an inflated state of the balloon for expanding the first stent segment to the first stent segment cross-sectional area;

a second balloon segment longitudinally offset with respect to the first balloon segment and configured to have a second balloon segment cross-sectional area in an inflated state of the balloon for expanding the second stent segment to the second stent segment;

a third balloon segment configured to assume a tapered balloon segment configuration in an inflated state of the balloon;

a fourth balloon segment configured to assume a tapered balloon segment configuration in an inflated state of the balloon and said fourth balloon segment connects the first balloon segment to the third balloon segment; and

a fifth balloon segment configured to assume a tapered balloon segment configured in an inflated state of the balloon and said fifth balloon segment connects the second balloon segment to the third balloon segment.