Term of Award
Master of Science, Mechanical Engineering
Document Type and Release Option
Thesis (open access)
Copyright Statement / License for Reuse
This work is licensed under a Creative Commons Attribution 4.0 License.
Department of Mechanical Engineering
Committee Member 1
Committee Member 2
This study explores the ability to measure the changing impedance, ex vivo, of a porcine colon sample while undergoing a high-frequency alternating current from an Olympus PSD-30 electrosurgical unit and stop the applied current before excessive tissue damage ensues. The causes of the thermal damage are first examined, followed by the construction and testing of the impedance-controlled feedback device. Perforation was observed to occur when the impedance of the tissue sample increased by 25% or more. Using this information, the device was tested for five power settings ranging from 10W-50W. In each trial, the feedback device stopped the applied current to the tissue samples when the measured impedance exceeded the cut-off threshold of a 25% increase from the starting impedance. The device was found to have an accuracy of ±5Ω. This successfully minimized undue tissue damage and proved able to prevent serious complications such as perforation from occurring.
Thornton, CurtisLee, "Development of an Impedance-Controlled Hot Snare Polypectomy Device to Minimize Tissue Damage" (2019). Electronic Theses and Dissertations. 1970.
Research Data and Supplementary Material