Cannula insertion devices, systems, and methods including a compressible member

US8333686B2 · kind B2 · utility

Assignee

• CircuLite, Inc. · US

Inventors

• Oliver Marseille · Aachen, DE
• Wolfgang Kerkhoffs · Aachen, DE

Key dates

• Filing date: Aug 29, 2007
• Grant date: Dec 18, 2012
• Expiry date: Feb 24, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M60/865
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An insertion device for inserting a cannula through tissue generally comprises an inner shaft, a tip member coupled to a distal end portion of the inner shaft, a hollow outer shaft slidably received over the inner shaft, and a compressible member received over the inner shaft between the tip member and the outer shaft. The compressible member is configured to be received in a lumen of the cannula, and the inner shaft is movable relative to the outer shaft along an axial direction to compress the compressible member between the tip member and the outer shaft so that the compressible member expands in a generally radially outward direction. The radial expansion of the compressible member releasably secures the insertion device to the cannula.