US 12,232,764 B2
Tissue-removing catheter with inner liner key
Aram Jamous, Athenry (IE); and Tomas K. Kelly, Galway (IE)
Assigned to MEDTRONIC VASCULAR, INC., Santa Rosa, CA (US)
Filed by MEDTRONIC VASCULAR, INC., Santa Rosa, CA (US)
Filed on Feb. 14, 2022, as Appl. No. 17/671,409.
Claims priority of provisional application 63/160,112, filed on Mar. 12, 2021.
Prior Publication US 2022/0287737 A1, Sep. 15, 2022
Int. Cl. A61B 17/00 (2006.01); A61B 17/32 (2006.01); A61B 17/3207 (2006.01); A61B 17/22 (2006.01)
CPC A61B 17/320783 (2013.01) [A61B 17/320725 (2013.01); A61B 17/320758 (2013.01); A61B 2017/00318 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/320052 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A tissue-removing catheter for removing tissue in a body lumen, the tissue-removing catheter comprising:
an elongate body having an axis, and proximal and distal end portions spaced apart from one another along the axis, wherein the elongate body is sized and shaped to be received in the body lumen;
a handle mounted to the proximal end portion of the elongate body, the handle comprising a housing enclosing components operable to cause rotation of the elongate body;
a tissue-removing element mounted on the distal end portion of the elongate body, the tissue-removing element being configured to remove the tissue as the tissue-removing element is rotated by the elongate body within the body lumen;
an inner liner received within the elongate body and defining a guidewire lumen;
an advancer mounted on the handle and movable relative to the housing;
a guide tube mounted in the handle and coupled to the advancer such that distal movement of the advancer relative to the handle causes distal movement of the guide tube, the elongate body, the tissue-removing element, and the inner liner,
wherein a proximal end of the inner liner is received in the guide tube within the handle and is movable distally relative to the guide tube and the handle, as the advancer is moved distally relative to the handle; and a motor in the handle and operatively engaging the elongate body for driving rotation of the elongate body and tissue-removing element mounted on the elongate body, and a gear assembly operatively connected to the motor, the gear assembly including a gearbox housing, wherein a distal end of the guide tube is attached to the gearbox housing.