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Electrical and electronic engineering
This paper investigated the application of FBG sensors in the measurement of scissor blade–tissue interaction forces. Sensor placement at the blade–tissue interaction site provides the basis for increased force measurement accuracy, without compromising the functionality of the instrument. This increased accuracy provided the foundation for in-depth analysis of the force components generated during typical scissor cutting cycles. Theoretical analysis and experimental investigation explored the decoupling of the major forces present during cutting. The isolation of tissue-fracture forces from inter-blade friction forces was carried out. This is useful as knowledge of the fracture properties of biological tissues can be diff cult to obtain. Moreover, the force information obtained can be ref ected to the user in a telerobotic application ensuring a greater sense of user immersion. Scissor cutting force data is of particular relevance to those involved in the development of soft tissue models for medical simulation systems. The motivation behind this work is to develop a smart surgical instrument capable of unobtrusively, and with minimal impact on instrument functionality, detecting tissue– instrument interaction forces. Future work will involve the miniaturization of the current technique enabling the development of a laparoscopic prototype instrument capable of acquiring in vivo force and material fracture properties
Callaghan, D. J., Rajan, G., McGrath, M. M., Coyle, E., Semenova, Y., Farrell, G. "Investigation and experimental measurement of scissor blade cutting forces using Fiber Bragg grating sensors". "Smart materials and structures" 20, 2011.