Design of an Impedance-Controlled Hot Snare Polypectomy Device

Abstract

This paper goes through the process of first designing a feedback system that allows for the measuring of impedance while using the hot snare polypectomy method. The electrosurgical unit used in this study was the Olympus PSD-30. After the impedance-controlled feedback system was completed, the device was tested under a range of power settings from 10 W–50 W. The test was performed ex vivo using porcine colon samples. Using the information gathered from these tests, a technique of determining the threshold of perforation and implementing a system to automatically stop the applied current from the PSD-30 was developed. The data showed that after an increase in impedance of 25% from that of the initially measured impedance, perforation ensued in the tissue samples. Using this information, the device was programmed to interrupt the PSD-30 at this threshold point. This final design was tested and proved able to automatically prevent the event of perforation from occurring, resulting in the ability to prevent serious complications.

Controlled Voltage of Hot Snare Polypectomy Device in Electrosurgical Device

“…Te outcome is tissue parching when the electrode is in direct contact with the tissue or tissue fulguration on the of chance that the cathode is not in direct contact with the tissue. While the cut fows, it causes faster hotness expansions on the tissue, which is over 100 °C, making the cell water bubble and burst, prompting tissue cleavage [14].…”