US 12,076,042 B2
Abrasive elements for rotational atherectomy systems
Andrzej Chanduszko, Chandler, AZ (US)
Assigned to Bard Peripheral Vascular, Franklin Lakes, NJ (US)
Filed by Bard Peripheral Vascular, Franklin Lakes, NJ (US)
Filed on Apr. 9, 2020, as Appl. No. 16/843,964.
Application 16/843,964 is a division of application No. 15/541,341, granted, now 10,646,248, previously published as PCT/US2014/072842, filed on Dec. 30, 2014.
Prior Publication US 2020/0237400 A1, Jul. 30, 2020
Int. Cl. A61B 17/3207 (2006.01); A61B 17/32 (2006.01)
CPC A61B 17/320725 (2013.01) [A61B 17/320758 (2013.01); A61B 2017/320004 (2013.01); A61B 2017/320052 (2013.01); A61B 2017/320766 (2013.01); A61B 2217/005 (2013.01); A61B 2217/007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of ablating a lesion in a vessel, comprising:
advancing a guidewire through the vessel;
advancing a sheath over the guidewire, the sheath having a proximal end, a distal end, and a lumen extending therethrough;
advancing a flexible driveshaft over the guidewire and through the sheath, the driveshaft having a first driveshaft portion having a first driveshaft portion distal end, a second driveshaft portion having a second driveshaft portion proximal end, a slotted tube having a slotted tube proximal end and a slotted tube distal end, wherein the slotted tube proximal end is mounted to the first driveshaft portion distal end, the slotted tube distal end is mounted to the second driveshaft portion proximal end and the slotted tube spacing the first driveshaft portion and the second driveshaft portion apart from one another to provide a gap between the first driveshaft portion and the second drive shaft portion, and an abrasive element attached to and protruding from an outer surface of the slotted tube, wherein the slotted tube is collapsible into the gap in a constrained state when the slotted tube and abrasive element are advanced through the sheath such that at least a portion of the slotted tube has a diameter smaller than a diameter of the driveshaft in the constrained state;
advancing the abrasive element out of the distal end of the sheath;
radially expanding a diameter of the slotted tube such that the slotted tube expands away from the gap in an expanded state when the slotted tube and abrasive element are rotated by the driveshaft; and
ablating the lesion.