Prosthetic repair of body passages

• US 20060041305A1
• Filed: 08/17/2005
• Published: 02/23/2006
• Est. Priority Date: 06/20/1996
• Status: Active Grant

• Current Assignee: Karl-Lutz Lauterjung
• Original Assignee: Karl-Lutz Lauterjung
• Inventors: Lauterjung, Karl-Lutz
• Granted Patent: US 8,486,129 B2
• Time in Patent Office: Days
• US Class Current: 623/1.360
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/24 Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
• CPC Class Codes: A61F 2/2412 with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2439 Expansion controlled by filaments
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/30327 differing in diameter
• CPC Class Codes: A61F 2002/30505 spring biased
• CPC Class Codes: A61F 2002/826 more than one stent being applied sequentially
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A prosthesis that resiliently engages a body passage includes an annular clamping ring which may be folded along a diametric axis for insertion into the body passage. The clamping ring is adapted to resiliently spring outwardly, once in position inside the body passage, and to be continually resiliently biased against the interior surface of the body passage. One or more of the clamping rings may be attached to opposed ends of a tubular graft. The rings and connected graft may be positioned in the body passage using a applicator which selectively permits expansion and/or in some embodiments contraction of the annular ring in position within a body passage. Alternatively a retaining member may be used to retain the annular ring in a compressed condition until it is in a desired position within a body passage. Among other potential uses, the present invention may be useful as a vascular stent for treating abdominal aortic aneurysms.

Claims

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37. A method for securing a prosthetic device in a body passage comprising:

folding a resilient, deformable annular ring to assume a first configuration having a cross-sectional area smaller than the cross-sectional area of an undeformed ring, said ring comprising a bundle of closely associated, concentric, radially overlapping windings formed of a strand of wire, the diameter of said bundle of windings corresponding with the diameter of said ring, said ring attached to and coaxial with a free end of a tubular graft;

positioning said ring at a desired position within a body passage; and

allowing said ring to resiliently deform to a second configuration having a larger cross-sectional area than in said first configuration, but still having a cross-sectional area smaller than that of said undeformed ring.

38. The method of claim 37 further including inserting a deformed ring in said body passage, positioning said ring at a desired location in a body passage and, releasing said deformed ring to allow said ring to expand and engage that body passage.

39. The method of claim 38 including selectively compressing and releasing the compression of said ring in position within a body passage using a remote actuator.

40. The method of claim 37 including positioning said prosthetic device at a desired location in a body passage by inserting said prosthetic device into the interior of a tubular catheter, positioning the catheter at a desired location within a body passage, and ejecting said prosthetic device from the interior of said catheter.

52. The method of claim 37, further including folding said ring to form a c-shape about a diametric axis.

53. The method of claim 40 including repositioning said prosthetic device after release from the interior of said catheter.

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54. A method comprising:

folding an annular resilient element along a diametric axis into a C-shaped configuration, said element attached to a graft; and

positioning said graft within a first blood vessel to extend along a length of said first blood vessel, a part of said positioned graft to extend past a point of an intersection of said first blood vessel and a second blood vessel so as not to occlude an opening to permit communication of said intersection, said element to contact said first blood vessel while in said C-shaped configuration.

55. The method of claim 54 including providing a graft having a diameter that is approximately the same as the diameter of said first blood vessel.

56. The method of claim 54 including providing an element having an undeformed diameter greater than the diameter of said graft.

57. The method of claim 54 including providing an element with an undeformed diameter greater than the diameter of said first blood vessel.

58. The method of claim 54 including providing an element comprising a bundle of concentric, radially overlapping windings formed of a strand of resilient wire.

59. A method comprising:

attaching an annular resilient element to an end of a graft;

folding said attached element along a diametric axis into a C-shaped configuration overall; and

resiliently engaging an arcuate portion of said C-shaped element with the interior of a first blood vessel.

60. The method of claim 59 including positioning said graft within said first blood vessel to extend along a length of said first blood vessel and past a point of an intersection of said first blood vessel and a second blood vessel so as not to occlude an opening to permit communication of said intersection.

61. The method of claim 59 including providing a graft having a diameter that is approximately the same as a diameter of said first blood vessel.

62. The method of claim 59 including providing an element having a diameter that is greater than the diameter of said graft.

63. The method of claim 59 including providing an element having an unfolded diameter that is greater than a diameter of the first blood vessel.

64. The method of claim 59 including providing an element comprising a bundle of concentric, radially overlapping windings formed of a strand of resilient wire.

65. A method comprising:

attaching an annular resilient element to a graft; and

positioning said graft within a first blood vessel that is intersected by a second blood vessel, a part of said positioned graft to extend past the intersection of said first blood vessel and said second blood vessel so as not to occlude an opening to permit communication of said intersection, said positioned graft and said positioned annular element to contact said first blood vessel on both sides of the intersection.