Deployable structures to provide electrodes on the surface of an endoscopically guided laser ablation catheter for use in ablation and electrophysiological mapping

An ablation balloon catheter comprising:

• an outer catheter shaft;
• an inflatable balloon coupled at a first end to the outer catheter shaft;
• an axially translatable nose tip to which a second end of the inflatable balloon is coupled;
• an electrode basket surrounding the balloon, the electrode basket having a plurality of first splines and a plurality of second splines, the electrode basket being coupled to the outer catheter shaft and to the nose tip, the electrode basket moving between a flattened state and an expanded state;
• and
• an actuator for axially translating the nose tip to facilitate the first and second electrode baskets moving to a collapsed state when the balloon is deflated, the actuator moving axially between an extended position and a retracted position;
• wherein the plurality of first splines and the plurality of second splines are configured to deploy and radially expand under inflation of the inflatable balloon;
• wherein the actuator is spring biased and assumes the extended position as an at rest position and assumes the retracted position when the balloon is inflated and force of the balloon on the plurality of first and second splines overcomes a spring force of the spring.

An ablation balloon catheter comprising:

• an outer catheter shaft;
• an inflatable balloon coupled at a first end to the outer catheter shaft;
• a forward-looking endoscope disposed within an interior of the inflatable balloon;
• a translatable nose tip to which a second end of the inflatable balloon is coupled;
• a first electrode basket having a plurality of first splines that surround an exterior of the balloon, the first electrode basket being coupled at a first end to the outer catheter shaft and at a second end to the nose tip, wherein one or more of the first splines support one or more electrodes;
• an actuator for axially translating the nose tip to facilitate the first electrode basket moving to a collapsed state when the balloon is deflated;
• wherein the plurality of first splines are configured to deploy and radially expand under inflation of the inflatable balloon.