Power testing of electrosurgical units and improvements to the load resistance
10.3969/j.issn.1672-8270.2025.11.031
- VernacularTitle:高频电刀的功率测试及负载电阻改进
- Author:
Ming LI
1
;
Zhigang GUO
;
Yuanyuan QU
Author Information
1. 北京市医疗器械检验研究院(北京市医用生物防护装备检验研究中心)机电二室 北京 101111
- Publication Type:Journal Article
- Keywords:
High-frequency electric knife;
Operating frequency;
Selection of experimental equipment;
Improvement of resistance;
Power measurement
- From:
China Medical Equipment
2025;22(11):195-198,202
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore an effective measurement method for the output power of high-frequency electrosurgical equipment,so as to provide a basis for improving the accuracy of measurement results of output power of this kind of equipment.Methods:Adopt a combined measurement method of voltage method and current method to verify the impedance characteristics of high-frequency resistors of the AJ-60 high-frequency surgical system at 4.2 MHz and 13.56 MHz.Through resistor modification,explore the measurement methods of output power under the two working modes of the system:monopolar pencil vaporization cutting(PV)and bipolar cutting(BC).Measure the power of the two working modes using both voltage method and current method,and analyze the influencing factors of their measurement accuracy.Results:The results of relative deviation between voltage method and current method for the measured power were significantly reduced through refit and comparison experiments.PV mode reduced from 40.58%to 1.11%,and BC mode reduced from 29.48%to 5.37%.In practical operation,the factors included limitation of prober's bandwidth,and mismatch of inputted impedance were important factors that affected the accuracy of measurement.Conclusions:In order to ensure accurate measurement for equipment's output power when operating frequencies exceed 4 MHz,it is essential to use non-inductive load resistance that is accurately calibrated at the specific operating frequency.It has great significance for enhancing the measured accuracy and reliability of output power of electrosurgical equipment with high-frequency.
