Patent ID: 11925321
Assignee: CANON U.S.A., INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. The steerable catheter according to claim 4,
wherein the tool channel includes a cylindrical surface that extends through the distal portion in a lengthwise direction,
wherein the housing portion of the positioning mechanism has a first cross-sectional dimension which is smaller than a diameter of the cylindrical surface of the tool channel,
wherein the one or more keying tabs of the anti-twist feature include one ore more arcuate tabs or wires extending radially outward from the housing portion to a second cross-sectional dimension of the anti-twist feature, and
wherein the second cross-sectional dimension of the anti-twist feature is approximately equal to or greater than the diameter of the cylindrical surface of the tool channel.