Balloon catheter and method for manufacturing same

US8888741B2 · kind B2 · utility

Assignee

• BIOTRONIK VI Patent AG · CH

Inventors

• Arthur Brunner · Trostberg, DE
• Adrian Blaser · Bellinzona, CH
• Matthias Wesselmann · Glattfelden, CH
• Patrice Bachmann · Winterthur, CH

Key dates

• Filing date: Jul 31, 2009
• Grant date: Nov 18, 2014
• Expiry date: May 15, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2025/1004
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A balloon catheter comprises an outer shaft having a distal end, an inner shaft situated therein to form an annular fluid line and projecting beyond the distal end of the outer shaft, and a balloon which is dilatable under the influence of a fluid introduced through the fluid line under pressure. At its proximal end the balloon is attached in a fluid-tight manner to the distal end region of the outer shaft at a first attachment zone, and at its distal end is attached in a fluid-tight manner to the distal end region of the inner shaft at a second attachment zone. Between the attachment zones, in the undilated state the balloon is placed in longitudinal folds along its length. The balloon, at least at its distal end, has an untapered design with a thin wall thickness (d) which is essentially unchanged over the length of the balloon, and the longitudinal folds extend into the attachment zone at that location.