Intravascular arterial to venous anastomosis and tissue welding catheter

US11950828B2 · kind B2 · utility

Assignee

• AVENU MEDICAL, INC. · US

Inventors

• Brad M. Kellerman · Escondido, US
• David Trottingwolf Aldridge · Laguna Hills, US
• David K. Wrolstad · Yucaipa, US
• Mark A. Ritchart · Dana Point, US
• Jeffrey E. Hull · Midlothian, US
• Gene Reu · San Clemente, US

Key dates

• Filing date: Oct 20, 2021
• Grant date: Apr 9, 2024
• Expiry date: Oct 7, 2042

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2018/00619
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method of creating an AV fistula between adjacent first and second vessels includes inserting a guidewire from the first vessel into the second vessel. Inserting a catheter including a proximal member and a distal member over the guidewire such that a distal tip of the distal member comes into contact with a selected anastomosis site. Moving the distal member and the proximal member together to clamp tissue surrounding the aperture between the distal face of the proximal member and a proximal face on the distal member. Applying energy to an active heating member on the proximal member to cut and form the aperture, and to weld the edges thereof in order to create a desired fistula between the two vessels. Using a passive heating member disposed on the distal member to create a heating gradient across a tissue contacting surface of the distal member.