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Fundamental Research on Realtime Monitoring Technique for Pedicle Screw Fixation Based on Near Infrared Spectroscopy

Author: PanYue
Tutor: QianZhiYu
School: Nanjing University of Aeronautics and Astronautics
Course: Biomedical Engineering
Keywords: Near Infrared Spectroscopy implantation monitoring reduced scattering coefficient pedicle screw screw path
CLC: R687.3
Type: Master's thesis
Year: 2010
Downloads: 11
Quote: 0
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Abstract


Currently pedicle screw fixation is a common spinal surgery and exist some problems such as perforation deviation and incorrect implantation. Since lacking intuitive and effective monitoring methods during clinical pedicle screw fixation surgery, a real-time monitoring technique for pedicle screw fixation based on NIRs was brought to improve the accuracy and safety of screw implantation. This study mainly focuses on the simulation and implementation of algorithm principle, the design and implementation of monitoring system and validatable experiments revolving this monitoring technique.The aspects mainly include as follows: (1) Develop a kind of optical properties retrieval algorithm based on the diffuse reflectance and verify the accuracy of the algorithm through experiments;(2) Implement a set of NIRs monitoring system for pedicle screw planting which can measure the reduced scattering coefficient(μs′) ahead of screw path during the surgery;(3) Animal experiments verify that the reduced scattering coefficient of tissue in screw path is closely associated with tissue structure of screw path. Meanwhile we have discussed the reduced scattering coefficient variation of the normal puncture and internal perforation; (4) Adult cadaver experiments verify that the reduced scattering coefficient is the identifying factor to determine the deviation of screw path, and acquire the safe threshold of the normal puncture which will be the foundation of alarm equipment for pedicle screw implantiation in the future.Innovations of this study mainly contain as follows: (1) Implementation of pedicle screw implantation monitoring through applying near infrared spectroscopy technology to pedicle screw fixation surgery for the first time; (2) Verification that the reduced scattering coefficient of tissue can be used as an identifying factor to navigate pedicle screw implantation through animal and cadaver experiments; (3) Acquire the reduced scattering coefficient variation of the normal puncture and internal perforation, theμs′safe threshold of the normal puncture path in human body.

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CLC: > Medicine, health > Surgery > Orthopaedic Surgery ( movement system diseases,orthopedic surgery ) > Orthopedic surgery and surgery > Bone surgery
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