Intravascular flow modifier and reinforcement device

• US 6,855,155 B2
• Filed: 12/10/2002
• Issued: 02/15/2005
• Est. Priority Date: 07/24/1998
• Status: Expired due to Fees

• Current Assignee: Micrus Corporation (Johnson & Johnson)
• Original Assignee: Micrus Corporation (Johnson & Johnson)
• Inventors: Wilson, Peter, Ferrera, David A., Lei, Lok A., Denardo, Andrew J.
• Primary Examiner(s): BUI, VY Q
• Application Number:
  US10/315,544
• Publication Number:
  US 20030083735A1
• Time in Patent Office: 798 Days
• Field of Search: 606191-198, 606/108, 623 11- 122, 600 1- 6
• US Class Current: 606/200
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/1219 expandable in contact with liquids
• CPC Class Codes: A61F 2/012 Multiple filtering units
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/885 comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0071 spherical
• CPC Class Codes: A61F 2230/0091 helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61F 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0037 differing in height or in length
• CPC Class Codes: B21F 45/008 of medical instruments, e.g. stents, corneal rings medical science A61

Abstract

An intravascular flow modifier and vascular reinforcement for treatment of aneurysms is formed of one or more loops of wire of resilient material formed into a series of transverse loops and longitudinal connecting sections to configure an essentially cylindrical reinforcement device that still allows, if desired, access to the neck of an aneurysm for insertion of embolic coils and the like. The proximal and distal regions of the sinusoidal loops may be more tightly coiled than the intermediate regions of the loops, or may have a larger diameter than the intermediate regions. The intravascular flow modifier and vascular reinforcement device can be provided with an outer covering that can be formed as a fiber, and can be woven, or can be formed as a ribbon wound about the intravascular flow modifier and vascular reinforcement device. The wire of resilient material can also be coated with a hydrophilic material. One or more round or oval intermediate loops extending radially outward may also be provided. An apparatus for removing clots may also be formed from one or more loops of wire of resilient material in a hollow conical shape non-detachably joined to a deployment device, to trap and hold clots within a vessel.

Claims

1. An apparatus for removing clots from the vasculature of a patient, comprising:

an elongate strand of resilient material having an initial compressed configuration and an expanded configuration, said elongate strand of resilient material having first and second proximal ends respectively connected by first and second legs of the elongate strand of resilient material to a distal middle loop of the elongate strand of resilient material, said first and second proximal ends being joined to a deployment device, said first and second legs of the elongate strand of resilient material forming a double strand of a plurality of sinusoidal loops having upper and lower arcs in the expanded configuration, said sinusoidal loops extending along a longitudinal axis of said apparatus for removing clots, said upper and lower arcs of said sinusoidal loops being curved about said longitudinal axis to form a hollow circumferential substantially bilaterally symmetrical pattern of loops about said longitudinal axis in said expanded configuration, said elongate strand of resilient material being movable from the initial compressed configuration to the expanded configuration extending outwardly from the longitudinal axis to trap and hold clots within a vessel, the elongate strand of resilient material being adapted to be placed within the vessel of the patient when the elongate strand of resilient material is in the compressed configuration and removed from the vessel when the elongate strand of resilient material is in the expanded configuration, whereby clots trapped by the loops can be withdrawn from the vessel; and

wherein said upper and lower arcs of said sinusoidal loops form a hollow conical circumferential pattern of loops about said longitudinal axis in said expanded configuration.

2. The apparatus of claim 1, wherein said distal middle loop of the elongate strand of resilient material defines a substantially circular loop.