Intracranial stent and method of use

• US 7,323,005 B2
• Filed: 08/12/2002
• Issued: 01/29/2008
• Est. Priority Date: 09/18/1996
• Status: Expired due to Fees

• Current Assignee: Micro Therapeutics, Inc. (Medtronic Plc)
• Original Assignee: Micro Therapeutics, Inc. (Medtronic Plc)
• Inventors: Wallace, George, Lenker, Jay, Berryman, Thomas J.
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US10/217,389
• Publication Number:
  US 20020198592A1
• Time in Patent Office: 1,996 Days
• Field of Search: 606191-198, 606/108, 623/1.12, 623/1.13, 623/1.15, 623/1.17, 623/1.35
• US Class Current: 623/1.11
• 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 17/1214 Coils or wires
• CPC Class Codes: A61B 17/122 Clamps or clips , e.g. for the umbilical cord for the vas deferens A61F6/206
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/0095 Saddle-shaped
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

A stent and stent catheter for intra-cranial use. The stent is a rolled sheet stent and is releasably mounted on the distal tip of the catheter with a low profile retaining tab. The stent is rolled tightly on the distal tip of the catheter and flexibility of the tightly rolled stent is promoted by ribbed or slatted construction (or, alternatively, slotted construction) in which the various layers of the stent are provided with numerous slats which counter align when the stent.

Claims

1. A stent for isolating a diseased portion of a intra-cranial vessel within the body, where the vessel is connected to branch vessels in close proximity to the diseased portion, said stent comprising:

a self expanding rolled sheet of resilient material having an open frame with a plurality of frame members, where at least one frame member is sized and dimensioned to occlude the diseased portion of the intra-cranial vessel and isolate the diseased portion of the intra-cranial vessel from blood pressure within the intra-cranial vessel; and

an opening between the frame members sized and dimensioned to overlie the branch vessels when the stent is placed within the vessel;

wherein the self expanding rolled sheet has a diameter of less than about 5 mm when rolled.

2. The stent of claim 1 wherein the sheet of resilient material is characterized by a first transverse edge connected to a first longitudinal edge connected to a second transverse edge connected to a second longitudinal edge connected to the first transverse edge and wherein the first transverse edge has a length less than an inner circumference of the vessel.

3. The stent of claim 1 wherein the sheet of resilient material is characterized by a first transverse edge connected to a first longitudinal edge connected to a second transverse edge connected to a second longitudinal edge connected to the first transverse edge and wherein the first transverse edge has a length greater than an inner circumference of the vessel.