Catheters and devices and systems incorporating such catheters

US11197977B2 · kind B2 · utility

Assignee

• Perfuze Limited · IE

Inventors

• Liam Mullins · Athlone, IE
• Dara Finneran · Roscommon, IE
• Alejandro Espinosa · Miramar, US
• Lisandro Rivera · Miramar, US
• Robert C. Farnan · Flagstaff, US
• Brett E. Naglreiter · Hollywood, US
• John Logan · Plymouth, US
• Andrew H. Cragg · Edina, US

Key dates

• Filing date: Mar 13, 2020
• Grant date: Dec 14, 2021
• Expiry date: Mar 13, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2017/22079
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A catheter has a jacket (10, 11, 5) defining a lumen and a helical support (6). The catheter has a proximal portion (1) and a distal portion (3), the distal portion having for at least some of its length a corrugated outer surface. A transition portion has a flexural stiffness which is less than that of the distal portion and more than that of the proximal portion. The transition portion provides an optimum transition in flexural stiffness by way of features of the jacket including geometry of jacket corrugations (15), or overlapping tubular layers (1073, 1074). The distal end of the distal portion may have an extension of liner material folded over (1072, 1082) to provide a particularly soft tip. In other examples the liner is terminated (763) before the distal tip. The catheter is particularly suited to an aspiration device (1350) with a flow restrictor (1353) and the distal portion distal of the flow restrictor. An aspiration system (3500) may employ the catheter with a pump which dynamically applies negative or positive pressure to optimally aspirate a clot.