Abstract: An orbital atherectomy system includes a handheld driver having a motor. An elongate flexible driveshaft has a proximal end portion and a distal end portion. The proximal end portion is drivably coupled to the motor. The distal end portion defines a rotational axis. An abrasive element is fixedly disposed on the distal end portion of the elongate flexible driveshaft. The abrasive element includes a first flat side, a second flat side, a leading tapered end portion having a leading end, and a trailing tapered end portion having a trailing end. The first flat side and the second flat side are on opposite sides of the rotational axis.

Abstract: A breast biopsy marker includes a catheter shaft and a bioabsorbable balloon. The catheter shaft has a lumen, a proximal tube portion, and a distal tube portion. The proximal tube portion is joined to the distal tube portion by a frangible link. The distal tube portion has a one-way valve located in the lumen. The bioabsorbable balloon is fixedly connected to the distal tube portion to define a balloon assembly. The bioabsorbable balloon is configured for fluid communication with the lumen of the catheter shaft at a location distal to the one-way valve of the distal tube portion of the catheter shaft. The balloon assembly is configured to be separated from the proximal tube portion of the catheter shaft by breaking the frangible link.