Patent ID: 8287442
Filing Date: 2012-10-16
Classification: A61M,A61N

Abstract:
1. A catheter device for irradiating tissue surrounding a site within a patient's body, comprising: a. an elongated shaft which has a distal portion configured to be deployed within the body site and a central longitudinal axis; b. a treatment location at the distal portion having one or more radiation guides configured to receive a radiation source and being off-set from the central longitudinal axis to irradiate tissue at least in part surrounding the body site; and c. an inflatable multilayered balloon surrounding the treatment location with a wall thereof having at least two layers including a first layer separate from, inside, and in contact with a second layer around an entire periphery of the first layer, and each of the first layer and the second layer being secured to the distal portion of the elongated shaft and configured to surround the treatment location in an as formed configuration and an inflated configuration, at least one layer of the multilayered balloon having an expansion of at least 25% but less than 200% from the as formed configuration when the multilayered balloon is inflated to a turgid condition.