Stent delivery system

• US 8,241,345 B2
• Filed: 07/30/2010
• Issued: 08/14/2012
• Est. Priority Date: 07/30/2009
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Stryker Corporation, Stryker Nv Operations Limited (Stryker Corporation)
• Inventors: Phung, Mark
• Primary Examiner(s): Matthews, William H.
• Assistant Examiner(s): SHAY, RANDY CITRIN
• Application Number:
  US12/847,241
• Publication Number:
  US 20110190862A1
• Time in Patent Office: 746 Days
• Field of Search: 623/1.11, 623/1.12, 606/108
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• 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 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A stent delivery system comprises a stent having a first connector disposed on a stent proximal end, and a pusher wire having a second connector disposed on a pusher wire distal end, wherein the first and second connectors are configured to releasably attach to each other.

Claims

1. A stent delivery system, comprising:

a pusher wire, comprising;

a tubular body having a pusher wire lumen;

an elongate body disposed in the pusher wire lumen;

a funnel shaped bumper disposed on a distal end of the tubular body;

a pair of holders disposed on the elongate body;

a middle bumper disposed on the elongate body distal of the pair of holders, wherein the pair of holders is configured to close around the middle bumper and secure a stent thereto when the elongate body is pulled proximally into the tubular body; and

a catheter having a proximal end, a distal end, and a catheter lumen extending between the proximal end and the distal end,

wherein the pusher wire is coaxially disposed within a lumen of the catheter, and

wherein an opening of the funnel shaped bumper is smaller than a cross sectional area of the pair of holders when closed around the middle bumper.

2. The system of claim 1, wherein the pair of holders is biased in an open position.