Constraining structure with non-linear axial struts

摘要

A constraining structure for use with a balloon catheter can include multiple longitudinal struts and multiple, sinusoidal shaped radial rings. The constraining structure can expand to form a pattern of channels including substantially square windows. The constraining structure can modify, restrict, and control a shape and/or size of the balloon when inflated. Inflating the balloon catheter within the constraining structure can provide nonuniform pressure on a vessel wall adjacent the balloon.

主权项

1. A balloon catheter, comprising
a catheter body; a constraining structure comprising:
a plurality of expandable, radial rings spaced apart along a length of the constraining structure, said plurality of radial rings comprising a proximal end ring and a distal end ring;a plurality of longitudinal struts spaced along a circumference of the constraining structure, the plurality of longitudinal struts comprising a first longitudinal strut and a second longitudinal strut, a first end of the first longitudinal strut attached to the catheter body and a second end of the first longitudinal strut attached to said proximal end ring, a first end of the second longitudinal strut attached to the catheter body and a second end of the second longitudinal strut attached to said distal end ring,wherein the constraining structure is configured to be positioned over the balloon catheter and wherein the constraining structure has an expanded and a collapsed state and is biased to be in the collapsed state, and wherein the first longitudinal strut moves in a first axial direction and the second longitudinal strut moves in a second axial direction during expansion of the constraining structure, the second axial direction being opposite the first axial direction.