Patent ID: 9717559
Date: 2017-08-01
CPC Classifications: A61B

Claim:
1. A catheter comprising: an elongated body having a longitudinal axis; a distal assembly distal the elongated body, the distal assembly having a hollow shape-memory support member defining a first curvature defining a helical form; at least one irrigated ablation ring electrode mounted on the helical form; a control handle proximal the elongated body; a contraction wire extending through the elongated body and the distal assembly, wherein longitudinal movement of the contraction wire results in contraction of the helical form; and a mandrel configured for insertion through the hollow shape-memory support member, the mandrel having a second curvature different from the first curvature of the helical form; wherein the helical form has an on-axis configuration such that a central longitudinal axis of the helical form is axially aligned with the longitudinal axis of the elongated body.