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US 2018/0280051 A1Published application
Chronic total occlusion crossing devices and methods
OwnerJihad A. MUSTAPHAinventor
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Abstract
A device for crossing a lesion in a tissue lumen includes a crossing wire configured to pass through a lumen of a catheter, the crossing wire including a loop at a distal end of the crossing wire, the loop having a configuration that prevents a width of the loop from exceeding a width of the tissue lumen, and the loop having a leading portion configured to interrogate the lesion.
Claims31
A device for crossing a lesion in a tissue lumen, comprising:
- a crossing wire configured to pass through a lumen of a catheter, the crossing wire including a loop at a distal end of the crossing wire, the loop having a configuration that prevents a width of the loop from exceeding a width of the tissue lumen, and the loop having a leading portion configured to interrogate the lesion,
- wherein the crossing wire is an elongated wire, the crossing wire having a proximal end controllable by a user,
- wherein the distal end of the crossing wire is configured for positioning in the tissue lumen for crossing a chronic total occlusion, the distal end including the loop, the loop having a pair of lateral opposing portions configured for alignment with a wall of the tissue lumen and the leading portion interconnecting the pair of lateral opposing portions, wherein the loop is configured for crossing the chronic total occlusion,
- wherein the proximal end of the crossing wire forms a portion of a primary shaft of the crossing wire, wherein one of the pair of lateral opposing portions of the loop is directly connected to the primary shaft, and wherein another of the pair of lateral opposing portions is directly connected to a secondary shaft of the crossing wire,
- wherein the crossing wire is configured to have a first configuration when contacting the lesion, wherein the primary shaft and secondary shaft are not intertwined in the first configuration,
- wherein the crossing wire is configured to have a second configuration when penetrating the lesion, wherein in the second configuration the primary shaft and the secondary shaft are intertwined by a first amount and the loop has width that is narrower than a width of the loop in the first configuration, and
- wherein the crossing wire is configured to have a third configuration when crossing the lesion, wherein in the third configuration the primary shaft and the secondary shaft are intertwined by a second amount that is greater than the first amount, and the loop has a width that is narrower than a width of the loop in the second configuration.
4 more elements
(canceled)
(canceled)
A method for crossing a chronic total occlusion (CTO), comprising:
- inserting a catheter having a looped wire disposed in a lumen of the catheter into an occluded vessel;
- extending a distal end of the looped wire beyond a distal end of the catheter to contact an occlusion;
- grasping the looped wire at a position proximal to a proximal end of the catheter;
- and
- rotating the grasped looped wire back and forth through an angle less than 360 degrees while maintaining the distal end of the looped wire in contact with the occlusion to erode the occlusion.
2 more elements
A device for crossing a lesion in a tissue lumen, comprising:
- a catheter forming a lumen;
- and
- a crossing wire configured to pass through the lumen of the catheter, the crossing wire including a primary shaft and a loop at a distal end of the primary shaft, the loop having a configuration that prevents a width of the loop from exceeding a width of the tissue lumen, and the loop having a leading portion configured to interrogate the lesion,
- wherein the crossing wire has a first configuration in which opposing lateral sides of the loop are not twisted or are twisted by a first amount, and a second configuration wherein the opposing lateral sides of the loop are twisted by a second amount that is different from the first amount,
- wherein the crossing wire can be changed from the first configuration to the second configuration by twisting the primary shaft at a position proximal to the catheter.
2 more elements
Dependencies are inferred from the claim text.