CPC A61B 5/066 (2013.01) [A61B 17/320758 (2013.01); A61M 25/01 (2013.01); A61M 25/0138 (2013.01); A61B 2017/003 (2013.01); A61B 2017/00309 (2013.01); A61B 2017/22038 (2013.01); A61B 2017/320775 (2013.01); A61M 25/0147 (2013.01); A61M 25/0155 (2013.01); A61M 25/0172 (2013.01)] | 22 Claims |
1. A catheter device for positioning a guidewire across an occluded portion of a vessel, the catheter device comprising:
a catheter body having a central lumen and a steerable distal region, the steerable distal region configured to bend laterally toward a predetermined side of the catheter body, wherein a distal end of the catheter body includes spiral shaped wedge members; and
a driveshaft extending within the central lumen and configured to rotate with respect to of the catheter body, the driveshaft coupled to and configured to rotate a distal tip having one or more cutting edges, wherein the driveshaft is configured to move longitudinally relative to the catheter body to extend the distal tip distally out of a central opening of the distal end of the catheter body and retract the distal tip proximally within the catheter body, wherein the one or more cutting edges are arranged in a spiral that is radially aligned with the spiral shaped wedge members of the distal end of the catheter body when the one or more cutting edges are extended out of the distal end of the catheter body, wherein the catheter device is configured to lock at least a portion of the distal tip in an extended position out of the central opening of the distal end of the catheter body, wherein the steerable distal region of the catheter body is configured to bend laterally toward the predetermined side of the catheter body upon application of a longitudinal pushing force on the driveshaft.
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