CATHETER APPARATUS WITH TELESCOPING LUMEN CATHETERS AND ITS USE IN METHODS FOR TREATING VASCULATURES

摘要

The invention provides for methods and catheter apparatus for passing one or more guidewires (via the use of one or more telescoping guidewire lumens) through a chronic total occlusion of a vasculature. The catheter apparatus may include: a catheter shaft having a distal end; one or more telescoping guidewire lumen catheters passing longitudinally through the shaft, wherein the one or more guidewire lumen catheters are capable of telescoping beyond the distal end of the catheter shaft; an expansible distal portion of the shaft; and a retractable sheath covering at least a portion of the expansible distal portion of the shaft, wherein retracting the retractable sheath from the expansible distal portion of the shaft directly activates the expansible distal portion of the shaft causing expansion of the expansible distal portion of the shaft.

主权项

1. A catheter apparatus comprising:
a main catheter shaft; one or more lumen telescoping catheters, each lumen catheter configured for passing over one or more guidewire; each lumen catheter capable of telescoping in and out from a distal end of the main catheter shaft; and an expansible support structure coupled to the distal end of the main catheter shaft, the expansible support structure configured so that each telescoping lumen microcatheter can telescope in and out of the expansible support structure.