Cryocath Technologies Inc.

Medtronic Cryocath LP

David Holtan

Marwan Abboud

Philippe Marchand

Fredric L Milder

Robert A Martin

Jean-Luc Pageard

Daniel Nahon

John W Lehmann

Miriam Lane

Leonilda Capuano

Johnny Al Asmar

Abderrahim Benrabah

Ken Chen

Jean-Pierre Lalonde

Claudia Lückge

Claudia L&uuml;ckge

Jean-Pierre LaLonde

An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. In the first case, the coolant also inflates the balloon, and spent coolant is returned to the handle via a return passage extending through the body of the catheter. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. Various configurations, such as surface modification of the balloon interface, or placement of particles, coatings, or expandable meshes or coils in the balloon interface, may be employed to achieve this function.

Endovascular cryotreatment catheter

Growing community of inventors

Beaconsfield, Canada

David Holtan