| JIANG Shuo,YANG Dan,LIU Wen-tao,ZHENG Jing,ZHANG Hao,LI Ke-zhou.Effect of Surface Wettability of Active Electrodes in High-frequency Electrosurgical Unit on Pancreatic Duct Closure[J],51(2):367-374 |
| Effect of Surface Wettability of Active Electrodes in High-frequency Electrosurgical Unit on Pancreatic Duct Closure |
| Received:June 18, 2021 Revised:August 29, 2021 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.02.037 |
| KeyWord:high-frequency electrosurgical unit active electrode surface wettability tissue adhesion pancreatic duct closure |
| Author | Institution |
| JIANG Shuo |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| YANG Dan |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| LIU Wen-tao |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| ZHENG Jing |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| ZHANG Hao |
West China Hospital, Sichuan University, Chengdu , China |
| LI Ke-zhou |
West China Hospital, Sichuan University, Chengdu , China |
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| Abstract: |
| In this study, the influence of the surface wettability of active electrodes on pancreatic duct closure is investigated, aiming to explore measures that could improve the anti-pancreatic fistula effect of high-frequency electrosurgical unit from the perspective of electrode surface modification. 304 stainless steel active electrodes were used as electrode samples, and the surface wettability of electrode sample was changed by means of chemical etching treatment. Fresh isolated porcine pancreas was selected as biological tissue sample to do pancreatic duct closure test using a high-frequency electrosurgical unit. With respect to the electrode samples with different surface contact angles, the corresponding tissue adhesion on electrodes, the morphology of the eschar on pancreatic section, the blasting pressure of main pancreatic duct, and the tissue damage of pancreatic stump were examined after pancreatic duct closure test. Results showed that the surface contact angle was 86.1° for the original 304 stainless steel active electrode. A surface microstructure consisting of evenly distributed micron-pits was formed on the electrode surface after one step etching treatment with FeCl3 solution, and the contact angle was reduced to 65.3°. After a further etching treatment with HCl solution, nano-holes were formed on the micron-pits, and the contact angle was increased to 111.5°. Under the same electrosurgery conditions, as the contact angle of the electrode surface increased, the tissue adhesion on electrode surface was reduced, the size of the hole in the eschar tissue on the pancreatic section become small, the closed thickness and blasting pressure of the main pancreatic duct were increased, and the tissue damage of the pancreatic stump was decreased. In sum, during electrosurgery, the surface wettability of active electrodes has an influence on the closure of pancreatic duct. Electrode surface hydrophobization can effectively resist the adhesion of tissue onto the electrode when the electrode acts on pancreatic tissue, thereby inhibiting the arc discharge at the electrode-pancreatic tissue interface. This helps to promote the effective closure of the pancreatic duct, reduce the tissue damage to the pancreatic stump, and then reduce the risk of postoperative pancreatic fistula. |
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