Delivery system having stent retention structure

US8961581B2 · kind B2 · utility

Assignee

• Boston Scientific Scimed, Inc. · US

Inventors

• Andrew K. Hollett · Waltham, US
• William J. Shaw · Cambridge, US

Key dates

• Filing date: May 23, 2011
• Grant date: Feb 24, 2015
• Expiry date: Oct 3, 2032

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2025/0175
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A drainage stent delivery system including an elongate shaft of a medical device, a drainage catheter or stent, and an engagement member, such as a distensible member or a compressible member, for selectively coupling the stent to the elongate shaft. The engagement member is positioned between the inner surface of the stent and the outer surface of the elongate shaft and is elongatable from a first length to a second length by longitudinal movement generally parallel to the central longitudinal axis of the stent to release the stent. At the first length, the engagement member is engaged with the inner surface of the stent to secure the stent on the elongate shaft, and at the second length the engagement member is sufficiently disengaged from the inner surface of the stent to release the stent from the elongate shaft such that the elongate shaft may be withdrawn from the stent.