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

Claim 9:
10. 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 inner stylet comprising:
a slot for providing clearance to the SMA material;
at least one actuation optical fiber coupling optical energy to the SMA material in the inner stylet slot and causing a deflection in the steering extent of the outer stylet;
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;
at least one temperature measurement optical fiber sensor.