Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (41): 7290-7296.doi: 10.3969/j.issn.2095-4344.2013.41.016

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Constant power electrosurgical generator: Biological tissue cutting and sealing

Ou Kong-wu1, Zhou Yu2, Yan Sheng-jie2, Li Dian-li2, Yan Bo-wen3, Song Cheng-li2   

  1. 1 School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Engineering Center for Minimally Invasive Medical Devices of Ministry of Education, Shanghai  200093, China; 2University of Shanghai for Science and Technology, Shanghai  200093, China; 3Bioengineering College of Chongqing University, Chongqing  400030, China
  • Received:2013-07-04 Revised:2013-07-10 Online:2013-10-08 Published:2013-11-01
  • About author:Ou Kong-wu★, Studying for master’s degree, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Engineering Center for Minimally Invasive Medical Devices of Ministry of Education, Shanghai 200093, China oukongwu@126.com
  • Supported by:

    Project of Shanghai Science and Technology Commission, No. 10441900900*; Research and Innovation Project of Shanghai Education Committee, No. 12YZ102*; Specific Fund for Shanghai Outstanding Young Teachers, No. slgl0020*

Abstract:

BACKGROUND: With the development of medical instruments, more and more traditional surgical operations are replaced by minimally invasive surgeries. In minimally invasive surgery, cutting and sealing tissue is a conventional procedure; however, due to the limitation of space and vision, the ordinary methods are not suitable for minimally invasive surgery.
OBJECTIVE: To develop high frequency electrosurgical generator that has a constant power output and ability for tissue cutting and closing.
METHODS: In order to improve the efficiency of tissue cutting and sealing in surgical, a kind of high-frequency energy generator was developed for tissue cutting and sealing. The instrument consisted of switching power supply with adjustable amplitude, high-frequency power amplifier, impedance monitor and microcontroller. The energy converter composed of switching power supply and high-frequency power amplifier converted the 220 V, 50 Hz utility powers to a kind of high-frequency energy with 450 kHz and applied on tissues. Impedance monitor would real-timely detect the electrical parameter impacting on tissue that was provide the amount of feedback to microcontroller in order to complete constant power control and bioimpedance determination by the controller.
RESULTS AND CONCLUSION: The experimental results indicated that the instrument could rapidly and stably provide high-frequency energy, and could detect the biological impedance in real-time, achieve constant power output through feedback control, and could cut and close the biological tissue efficiently.

Key words: surgical procedures, minimally invasive, wound closure techniques, tissues, electric impedance

CLC Number: