The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2009
Filed:
Dec. 22, 2004
David W. Vancelette, St. Louis Park, MN (US);
Nicholas R. Van Der Walt, Hillcrest Park, ZA;
Jia Hua Xiao, Maple Grove, MN (US);
Eva S. Snitkin, Minneapolis, MN (US);
David W. Vancelette, St. Louis Park, MN (US);
Nicholas R. van der Walt, Hillcrest Park, ZA;
Jia Hua Xiao, Maple Grove, MN (US);
Eva S. Snitkin, Minneapolis, MN (US);
AMS Research Corporation, Minnetonka, MN (US);
Abstract
A cryoablation system including a cannula having a proximal end, a distal end, and a longitudinal axis, an expandable balloon extending from the distal end of the cannula and fluidly connected to a source of heat transfer fluid by at least one fluid path, a pump for circulating the heat transfer fluid into and out of the balloon, a probe handle coupled to the proximal end of the cannula and in fluidic communication with the balloon through the cannula, and a heat exchanger for varying the temperature of the heat transfer fluid, wherein the heat exchanger is fluidly connected to a secondary refrigerant source. The heat exchanger may be positioned within the probe handle, within the cannula, or at least partially within the balloon. The heat transfer fluid of this cryoablation system preferably has a freezing point lower than about −110° C. and a boiling point greater than about 50° C.