Patent ID: 7179257

Claim:
A catheter assembly comprising a catheter tube, an operative element carried at one end of the catheter tube, the operative element including a basket structure comprising at least first and second spines, each spine including a flexible body defining at least two interior first and second lumens, a first one of the interior lumens of each first and second spine including a fluid-conveying port, first and second elongated electrode elements extending, respectively, through the second one of the interior lumens of the first and second spines for sliding movement between a retracted position withdrawn in the respective second one of the interior lumens and an extended position extending outward from the respective second one of the interior lumens, a mechanism carried by the catheter tube for controlling the sliding movement of the first and second elongated electrode elements between the retracted and extended positions, and a manifold body carried within the catheter tube, the manifold body including a single main fluid junction coupled to a fluid source or a fluid destination external to the catheter tube, first and second fluid junctions each individually coupled, respectively, to the first one of the interior lumens of the first and second spines, and a fluid circuit formed within the manifold body to channel fluid between the single main fluid junction and the first and second fluid junctions.