Study on the Impedance Rules of Bulky Blood Vessels in the
Operating Environment of Electrosurgical Equipment
LI Guixiang1,2, WU Fei1,3, XU Weikang1,2, TAN Zhongwei1,2, HUANG Dequn1,2, CHEN Jun2
1. Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, National Engineering Research Center for
Medical and Healthcare Devices, Guangdong Key Laboratory of Medical Electronic Instruments and Polymer Materials, Guangzhou
Guangdong 510316, China; 2. Guangdong Institute of Medical Instruments, Guangzhou Guangdong 510500, China；
3. School of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou Guangdong 510000, China
Abstract：Objective To explore the impedance changes of vessels in the operating environment of electrosurgical vascular closure
equipment, such as frequency, temperature and pressure. Methods The constant current source, constant temperature water bath and
LCR tester were used to establish the vascular impedance law test system, and then the impedance change law of rabbit thick and
large blood vessels under the action of different influencing factors was studied. Results Under the condition of 26℃ and current
frequency from 200 to 950 kHz, the vascular impedance of rabbits with an inner diameter of (5.1±0.1) mm and length
of (40.0±0.5) mm decreases with frequency. The real part of the impedance decreased with the increase of frequency, and the
imaginary part decreased first and then increased, showing a frequency transition characteristic. When the frequency was 350 kHz, the
imaginary part impedance was the minimum. Under the stimulation of 350 kHz high frequency current, the vascular impedance first
decreased with the increase of temperature, and then began to increase after 54℃, showing a temperature transition characteristic.
Vascular impedance decreased with increasing clamping pressure and increased with increasing voltage. Conclusion The preliminary
discovery of vascular impedance law can provide a theoretical and technical basis for the research of real-time impedance feedback
technology, which is a key technology of vascular closure device development.
李桂香1,2，吴飞1,3，许为康1,2，谭仲威1,2，黄德群1,2，陈军2. 粗大血管在电外科设备操作环境下的阻抗规律研究[J]. 中国医疗设备, 2022, 37(9): 19-22.
LI Guixiang1,2, WU Fei1,3, XU Weikang1,2, TAN Zhongwei1,2, HUANG Dequn1,2, CHEN Jun2. Study on the Impedance Rules of Bulky Blood Vessels in the
Operating Environment of Electrosurgical Equipment. China Medical Devices, 2022, 37(9): 19-22.
