US Patent 11752311 Apparatus and methods for restoring tissue

An apparatus and methods tissue restoration are provided. The apparatus may include a catheter shaft extending from a proximal end to a distal tip, a plurality of serial balloons positioned on a translucent distal segment of the catheter shaft proximal to the distal tip and positioned inside of and concentric with a second distal balloon, the plurality of serial balloons in fluid communication with an inflation source via a first lumen, each of the plurality of serial balloons having a selectively expandable outermost radial surface. The plurality of serial balloons may include a translucent material, a series of isolated volumetric regions positioned between the plurality of serial balloons and recessed from the outermost radial surfaces of the serial balloons. The apparatus may include a distal balloon positioned around the plurality of serial balloons, and a light fiber positioned in the catheter shaft and extending through the translucent distal segment.