Abstract: A cutting accessory for a surgical instrument. The cutting accessory includes a tube assembly (38) including an outer tube having at least one slotted region (50) configured to be bent to a shaped configuration and maintain the tube assembly in the shaped configuration. The slotted regions may be a proximal slotted region spaced apart from a distal slotted region to define a rigid intermediate segment, and a rigid distal segment of the tube assembly. The proximal or distal slotted regions may be at different rotational orientations. The spacing between adjacent slots of the proximal slotted region may be different than spacing between adjacent slots of the distal slotted region. The tube assembly may be shaped with an initial prebend at a predetermined angle and configured to be bent relative to the predetermined angle. The tube assembly may be a two-tube or three-tube arrangement.

Abstract: A cutting accessory for a surgical cutting instrument. The cutting accessory includes a sensor assembly including at least one sensor coupled near a cutting tip of a tube assembly. The tube assembly may be straight, bent, rigid, or malleable. The sensor assembly may include a substrate coupled to the outer tube with electrical traces disposed thereon in a twisted pair configuration. The sensor may be a coil sensor wound about an insulative spacer coupled to a distal region of the substrate. The coil sensor is electrically coupled to the electrical traces. A flexible region of the substrate may traverse the bend or malleable region, and the electrical traces may be in a linear configuration within the flexible region. The sensitivity of the coil sensor may be based on the properties of the tube assembly, and/or the axial location of the coil sensor relative to the cutting tip.