Title Analysis of the effect of high frequency vibrations on human biological tissues /
Translation of Title Aukštadažnių virpesių poveikio biologiniams žmogaus audiniams tyrimas.
Authors Navickas, Jonas
Full Text Download
Pages 130
Keywords [eng] ultrasound ; vascular clearing ; high frequency vibrations
Abstract [eng] Cardiovascular diseases are the leading cause of death in the European Union. Therefore, the aim of the research is to investigate the effect of the active invasive ultrasonic vascular clearing systems on live human tissues and to use the relevant findings and the results obtained in the course of the research for the further improvement of the active members that are currently used in ultrasonic systems. In order to achieve the above stated aim, the following objectives were set: 1) To accomplish analysis of literature on the currently known effects of ultrasound on human tissues and waveguides currently being used for the purpose of vascular clearing. 2) To develop a multipurpose waveguide capable of operating in three directions and suitable for restoring the functioning of the blood vessels in an interventional way. 3) To develop a technique for the research of the cavitation process within fluids while mathematically modeling the waveguide of a newly designed structure operating within the tissue-confined fluid. 4) To investigate experimentally the newly designed and find out the effects it has on human tissues, and to determine the operational characteristics of the system under consideration. This work is carried out by using theoretical and experimental research methods. The theoretical studies were performed by using COMSOL MULTIPHYSICS computer software packages. . The experimental results were obtained by using the most up-to-date available non-contact laser measuring and other experimental equipment. An innovative waveguide of a unique shape has been designed for invasive clearing of blood vessels capable of generating the cavitation flow by means of inducing mechanical multidimensional vibrations of ultrasonic frequency. The waveguide under consideration is used within the ultrasound system for the elimination of vascular disorders in humans.
Dissertation Institution Kauno technologijos universitetas.
Type Doctoral thesis
Language English
Publication date 2018