Adjustable catheter for ostial, septal, and roof ablation in atrial fibrillation patients

摘要

A device and method for treating a variety of tissue locations within a patient's body using a single device that includes an elongate body having a distal portion, a shaft rotatably and slidably disposed within the elongate body, and a first arm and a second arm each coupled to the elongate body distal portion. Retraction and rotation of the shaft transitions the each arm from a linear configuration to a radially expanded configuration in which each arm has an arcuate shape and lies in a plane that is substantially orthogonal to the elongate body longitudinal axis. Electrodes coupled to the arms are equidistant from the longitudinal axis of the elongate body in different radial directions when the device is in the radially expanded configuration. The electrodes are radially symmetrical about the shaft when the radially expanded configuration has a first diameter or a second diameter.

主权项

1. A medical device, the medical device comprising:
an elongate body defining a longitudinal axis, a proximal portion, and a distal portion; a shaft rotatably and slidably disposed within the elongate body, the shaft defining a distal portion and a proximal portion and being configured to rotate within the elongate body; a treatment array including a first arm defining a distal end engaged with the shaft distal portion, a proximal end engaged with the elongate body distal portion, and a first midpoint at a first position, and a second arm defining a distal end engaged with the shaft distal portion, a proximal end engaged with the elongate body distal portion, and a second midpoint at a second position, the rotation of the shaft relative to the elongate body about the longitudinal axis and movement of the shaft along the longitudinal axis together being configured to transition the treatment array from a first configuration to a second configuration, the movement of the shaft along the longitudinal axis being configured to transition each of the first arm and the second arm from a substantially linear shape to an arcuate shape, and the rotation of the shaft relative to the elongate body about the longitudinal axis being configured to cause the first arm and the second arm to be positioned such that the first arm and the second arm are coplanar with each other in a plane that is substantially orthogonal to the longitudinal axis with the first and second midpoints being approximately 180° from each other.