Patent ID: 11877732
Assignee: INTELLIGENT FIBER OPTIC SYSTEMS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 19:
20. A shape sensing biopsy needle comprising:
an outer stylet and an inner stylet surrounding a central axis,
the outer stylet comprising a hollow cylinder, the hollow cylinder further comprising, in sequence: a base portion, a needle extent, a first Shape Memory Alloy (SMA) anchor extent, a steering extent, a second SMA anchor extent;
the steering extent comprising a plurality of parallel slots in the outer stylet, each of the plurality of parallel slots perpendicular to the central axis and terminating in a circular aperture;
the outer stylet also having an SMA material attached in the first SMA anchor extent and also the second SMA anchor extent and spanning the steering extent, the SMA activated by optical energy and causing a deflection of the outer stylet steering extent;
the inner stylet comprising:
a slot for providing clearance to the SMA material;
at least one deflection measurement optical fiber for measuring a deflection, the deflection measurement optical fiber having a plurality of slots formed in the fiber cladding, the slots placed in a plane substantially perpendicular to the fiber axis, the deflection measurement optical fiber having a reflective termination.