Patent Number: 6,251,128

Title: Microwave ablation catheter with loop configuration

Abstract: A catheter which may be configured as a loop during an ablation procedure, and a method of use for such a catheter, are disclosed. According to one aspect of the present invention, an ablation catheter includes a flexible distal member arranged to inserted into a first vessel in the body of a patient, and an elongated flexible tubular member with a distal portion which is coupled to a proximal portion of the flexible distal member. The elongated flexible tubular member has a flexibility that is greater than or equal to the flexibility of the flexible distal member. The catheter also includes a transmission line which is at least partially disposed within the elongated flexible tubular member. A proximal end of the transmission line is suitable for connection to an electromagnetic energy source. The catheter further includes a transducer that is coupled to the transmission line, and is arranged to generate an electric field sufficiently strong to cause tissue ablation. In one embodiment, a distal portion of the flexible distal member is arranged to protrude from a second vessel of the body of the patient while at least part of the elongated flexible tubular member is located in a cardiac chamber of the heart of the patient.

Inventors: Knopp; Peter G. (Fremont, CA), Downar; Eugene (Toronto, CA), Woodard; Robert E. (Hayward, CA), Larkin; Kevin T. (Menlo Park, CA), Nguyen; Hiep P. H. (Milpitas, CA)

Assignee: Fidus Medical Technology Corporation

International Classification: A61B 18/14 (20060101); A61F 002/00 ()

Expiration Date: 06/26/2018