Patent ID: 9661984
Date: 2017-05-30
CPC Classifications: A61B

Claim:
1. A method of treating tissue comprising: inserting into a body of a patient an endoscopic instrument having an expandable chamber in a collapsed configuration; after the insertion of the endoscopic instrument into the patient, expanding the chamber from the collapsed configuration to an expanded configuration to increase a transverse dimension of the chamber providing a larger space inside the chamber, wherein the step of expanding the chamber expands the chamber proximal to a distalmost end of the endoscopic instrument so that the chamber has a transverse dimension greater than the transverse dimension of the distalmost end of the endoscopic instrument; inserting a distal portion of a working instrument into the chamber, the working instrument extending through a first channel in the endoscopic instrument, and the distal portion of the working instrument extending laterally with respect to a longitudinal axis of the endoscopic instrument; and visualizing the distal portion of the working instrument by a visualization device which extends through a portion of the endoscopic instrument and is separate and radially spaced from the first channel.