TREATMENT FOR EPITHELIAL DISEASES

摘要

An apparatus and method for treating epithelial hyperproliferative diseases by application of an active composition over the diseased irregular tissue which is in the form of a viscous gel to carry the photosensitizer. The gel's viscosity allows it to adhere to the tissue for a sufficient time to transfer the photosensitizer or for a mechanical device such an expanding balloon to press the gel into the tissue. The photosensitizer within the gel is activated by the corresponding wavelenght of radiation. An extended multi-ballon system limits the area of treatment and localizes the spread of the gel. The apparatus, designed to be used with an endoscope, contains a catheter with at least two balloons, one to block drainage of the gel and one to limit the height of the treatment area and to press the gelinto the tissue.