US 11,813,414 B2
Control systems for shapeable catheters
Stephen Porter, Piedmont, CA (US)
Assigned to Stryker Corporation, Kalamazoo, MI (US); and Stryker European Operations Limited, Carrigtwohill (IE)
Filed by STRYKER CORPORATION, Kalamazoo, MI (US); and STRYKER EUROPEAN OPERATIONS LIMITED, Carrigtwohill (IE)
Filed on Mar. 5, 2021, as Appl. No. 17/194,198.
Claims priority of provisional application 62/987,680, filed on Mar. 10, 2020.
Prior Publication US 2021/0283373 A1, Sep. 16, 2021
Int. Cl. A61M 25/01 (2006.01)
CPC A61M 25/0147 (2013.01) [A61M 25/0136 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An intravascular device, comprising:
an elongated catheter body having a proximal end and a distal end;
first and second pull wires extending within the elongated catheter body, wherein distal ends of the first and second pull wires terminate at different axial locations along the distal end of the catheter body;
a pulley including an axle and a wheel around which a proximal end of the first pull wire is looped;
a lever arm to which a proximal end of the looped first pull wire is engaged at a first anchor point, and to which a proximal end of the second pull wire is engaged at a second anchor point different from the first anchor point;
a controller configured for applying a single linear tensile force to the pulley, whereby two tensile outputs are simultaneously applied respectively to the proximal ends of the first and second pull wires by the lever arm at the first and second anchor points in accordance with a preset pull wire tension ratio, such that the distal end of the elongated catheter body assumes a compound curve comprising two bends.