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1. (WO2018031281) DEVICES AND METHODS FOR DELIVERING FLUID TO TISSUE DURING ABLATION THERAPY

Pub. No.:    WO/2018/031281    International Application No.:    PCT/US2017/044706
Publication Date: Fri Feb 16 00:59:59 CET 2018 International Filing Date: Tue Aug 01 01:59:59 CEST 2017
IPC: A61B 18/18
A61B 18/14
A61B 18/00
Applicants: THERMEDICAL, INC.
Inventors: CURLEY, Michael, G.
EBERL, Gregory, R.
CLEVENGER, Jason, M.
HOWARD, Michael, T.
DELLY, Erik
Title: DEVICES AND METHODS FOR DELIVERING FLUID TO TISSUE DURING ABLATION THERAPY
Abstract:
Devices and methods for delivering fluid to tissue during ablation therapy are described herein. An exemplary device can include an elongate body having an inner lumen, outlet ports, and an ablation element configured to heat tissue. A flow resistance of the elongate body can increase along a length of the elongate body containing the outlet ports in a proximal to distal direction. This can be accomplished by, for example, varying outlet port size or relative spacing, decreasing a cross-sectional area of the inner lumen through which fluid can flow using a flow diverter or tapered inner lumen sidewalls, or limiting a ratio between a total area of the outlet ports and a cross-sectional area of the inner lumen. Adjusting flow resistance of the elongate body can provide more uniform fluid distribution or a desired non-uniform distribution.