Expandable retrieval device

• US 8,468,678 B2
• Filed: 07/18/2011
• Issued: 06/25/2013
• Est. Priority Date: 10/02/2002
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Salahieh, Amr, Schultz, Michael, Laduca, Paul, Broome, Thomas E.
• Primary Examiner(s): Bryant, David
• Assistant Examiner(s): Maynard, Steven A
• Application Number:
  US13/185,084
• Publication Number:
  US 20110295307A1
• Time in Patent Office: 708 Days
• Field of Search: 294/47, 294/58, 295/271, 295/272, 264/137, 264/171.26, 264/236, 264/237, 264/279, 600206-209, 604/103.06, 604/104, 604/105, 604/527
• US Class Current: 29/527.2
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2210/0057 stretchable
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: Y10T 29/49885 with coating before or during assembling
• CPC Class Codes: Y10T 29/49982 Coating

Abstract

A device for retrieving an intravascular device from a body lumen is disclosed. A retrieval device in accordance with an exemplary embodiment of the present invention includes a braided member coupled to an elongated shaft member. The braided member may include a number of filaments defining a radially expandable inner lumen configured to receive and encapsulate the intravascular device therein. An elastomeric jacket disposed about at least a portion of the braided member may encase the filaments.

Claims

1. A method of forming a medical device for retrieving an intravascular device from a body lumen, comprising;

providing a braided member, including a plurality of filaments, adapted to radially expand and axially shorten when subjected to a tensile force, said braided member having a proximal end, a proximal portion, a distal end, a distal section adjacent to the distal end, and a lumen between the proximal end and the distal end sized and configured to receive an intravascular device to be retrieved;

extruding an elastomeric material over the distal section of the braided member;

cooling the elastomeric material to produce an elastomer coated braided member; and

attaching the elastomer coated braided member to an elongated shaft member having a flared distal section, wherein the proximal portion of the elastomer coated braided member extends proximally of a distal end of the elongated shaft member and is coupled to the flared distal section of the elongated shaft member, and the distal portion of the elastomer coated braided member extends distally of the distal end of the elongated shaft member,

further wherein at least a portion of the proximal portion is encased within a wall of the flared distal section of the elongated shaft member.

2. The method of claim 1, wherein attaching the elastomer coated braided member to an elongated shaft member having a flared distal section includes welding the elastomer coated braided member to the elongated shaft member having a flared distal section.

3. The method of claim 1, wherein attaching the elastomer coated braided member to an elongated shaft member having a flared distal section includes placing a heat shrink tube about the distal section of the elongated shaft member and the elastomer coated braided member;

heating the distal section of the elongated shaft member and the elastomer coated braided member until they are melded together; and

removing the heat shrink tube.

4. The method of claim 1, wherein attaching the elastomer coated braided member to an elongated shaft member having a flared distal section includes adhering the elastomer coated braided member to the elongated shaft member having a flared distal section.

5. The method of claim 1, wherein the extruding step and the attaching step are combined such that at least part of the proximal portion of the braided member is integrally formed with the elongated shaft member.

6. The method of claim 1, wherein the elastomer of the elastomer coated braided member has a thickness generally equivalent to that of the flared distal section of the elongated shaft member.