Methods and systems for treatment of tissue in a body lumen

摘要

A system for measuring physiologic characteristics or treating tissue in a body lumen. The system may be used for treating abnormal mucosa in the esophagus. The system comprises an energy delivery device, such as an ablation device including an electrode support and an electrode pattern on the support. The ablation device may expand in size from a pre-deployed state to a deployed state. The system may include a sizing device having an inflatable balloon on a distal end of a catheter that is inflated with an expansion medium to expand the balloon to engage the wall of the esophagus so that the internal cross-section can be calculated or measured. The sizing device may also a controller for delivering an expansion medium and measuring the amount and pressure of the expansion medium inside the catheter. Methods of treating or diagnosing tissue are also disclosed.

主权项

1. A system for treating abnormal tissue at a treatment location within a body lumen comprising:
an electrode support comprising a flexible, non-distensible backing with a pre-deployed state and a deployed state, wherein a circumference of the electrode support in the deployed state adapts to engage an inner wall of the body lumen; an inflatable member around which the electrode support is wrapped such that the electrode support extends continuously around a circumference of the inflatable member and continuously covers the circumference along a length of the inflatable member between a distal end and a proximal end of the inflatable member; and an electrode pattern positioned on the electrode support and extending around the circumference of the electrode support in the deployed state.