Deyuan Zhang, Ph.D.
Professor, Beihang University
zhangdy@buaa.edu.cn
Biography:
Deyuan Zhang, PhD, Professor, the former director of Department of Mechanical Engineering and Automation, School of Mechanical Engineering and Automation, Beihang University. Now, he is the director and key member of the Institute of Bionic and Micro-Nano System and Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University in Beihang University. His main research focus includes the bionic-bio-manufacturing and the ultrasonic processing technology. Professor Zhang is one of the sponsor members of International Society of Bionic Engineering, director of Biological Manufacturing Branch, and committee director of Ultrasonic Machining from Non-traditional Machining Branch in Chinese Mechanical Engineering Society (CMES). He has undertaken more than 10 key projects from the National 863 Program, the National Natural Science Foundation and the General Armaments Department. He is also principle investigator of more than 20 major engineering projects from industrial enterprises. Professor Zhang has published more than 300 papers and filed more than 40 patents. He has been honored with one International Invention Exhibition Gold Medal and five provincial science & technology progress awards. Professor Zhang is the supervisor of one Top100 national excellent doctoral thesis, and also the corresponding author of a paper published on Nature magazine.
Topic title：The application of ultrasonic vibration in minimally invasive surgery
Abstract: Ultrasound refers to sound waves that have a wave frequency greater than 20kHz. Recently，there is an evolving spectrum of therapeutic uses of ultrasonic energy. In one aspect, surgical cutting and coagulating systems, which use a frequency of 23-55kHz to transimit energy to surgical instrument that may be used for transection of tissue and coagulation of blood vessels. Furthermore, in another aspect, ultrasonic-assisted electrosurgical electrodes, which intergrate ultrasonic vibration with electrosurgical electrode that may used for improving the cutting performance of electrosurgical electrode. Thus a short summary of this technology is introduced from the cutting mechanism and application, respectively. Ultrasonic surgical devices manifest their tissue effect by one or a combination of mechnisms that include mechnical cutting, desiccation and protein coagulation, and a hybrid form of vaporization cavitation. Besides, the separation cutting resulted from the ultrasonic vibration is regarded as the key factor which improve the cutting performance of electrosurgical electrode in terms of less tissue adherent and thermal injury.