Spinal Needles Insertion And Traversal Based On Fiber Bragg Gratings-From Conceptual Approach To Prototype Development

Real-time needle positioning is essential in present-day surgical advancements including robotic assistive surgeries. Present work reports progressive methodology adopted for real-time dynamic monitoring and assessment of spinal needle insertion and traversal based on variation in compressive force on the needle. The initial conceptual approach adopted for monitoring of the exclusive longitudinal force experienced by spinal needle during its penetration through tissue layers is illustrated. The working principle of the preliminary conceptual design is based on transduction of force induced on the needle into strain variations monitored by a fiber Bragg grating sensor. This methodology may assist force modeling on the needle during tissue penetration which may help in recognizing the tissue layers penetrated.