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

Claim 12:
13. The steerable catheter according to claim 4,
wherein, at the distal end of the catheter body, the tool channel has a circular cross-section having an inner diameter,
wherein the housing portion of the positioning mechanism includes an irregularly shaped tube having a long diameter and a short diameter perpendicular to each other, wherein the irregularly shaped tube has outward curved portions and inward indentations, the outward curved portions and the inward indentations are symmetric with respect to the long diameter and asymmetric with respect to the short diameter,
wherein the short diameter is smaller than the inner diameter of the tool channel and the long diameter is approximately equal or larger than the inner diameter of the tool channel, and
wherein the one or more keying tabs of the anti-twist feature include the outward curved portions which are pressure fit within the inner diameter of the tool channel.