Numerical modeling of the impact on the vascular wall during endovenous ultrasound treatment.

The article describes the research of a new treatment method of lower limb varicose vein using low-frequency ultrasound. To study the effectiveness of this method we analyzed the interaction between the ultrasound instrument and the venous wall and defined the mechanisms of action during endovenous ultrasound treatment (EUT): thermal, mechanical, and chemical. We developed three models to study the impact of different combinations of mechanisms of action on varicose venous wall.

[Prospects and peculiarities of the procedure of ultrasound ablation of subcutaneous veins of the lower limbs].

The last decade has seen active development of minimally invasive (endovenous) methods of surgical removal of lower limb varicose veins (LLVV); however, the problem of increasing efficacy of these methods and improving long-term results still remains of current importance. The authors of this work propose a method of ultrasound ablation of subcutaneous veins of lower extremities. Our experimental study was aimed at determining the pattern of venous wall damage after ultrasound exposure.

Study on the Design and Application of Combining Low-Frequency Ultrasound with Laser Radiation in Surgery and Therapy.

Further development of combined laser-ultrasonic medical technologies is presented. An analysis is made of the main effects produced by low-frequency ultrasound on biological tissues. These effects include cavitation, acoustic streamings, acoustic pressure, and mechanical influence.

Modeling of transcatheter aortic valve replacement: Patient specific vs general approaches based on finite element analysis.

Background: There are two main methods used for transcatheter aortic valve replacement (TAVR) FEA modeling for medical devices development: patient specific and general approaches. Advantages and disadvantages of both approaches have never been compared in a single study.

Method: Here we propose a bioinformatic algorithm to evaluate the accuracy of patient specific and generalized FEA approaches with regards to proximity configuration of the implanted stent reconstructed by computed tomography.

[Elucidation of the Tubular Leaflet Geometry of the Aortic Heart Valve Prosthesis by Finite Element Analysis].

This paper presents the analysis of relationships between geometrical parameters of the tubular leaflet apparatus and its functional characteristics. In addition, the degree of the influence of deformation of different zones of leaflets on its ability to perform its function is evaluated in this work. The outcomes of this study could be helpful in developing new models of the transcatheter prosthetic heart valves leaflet apparatus or analyzing existing in-clinical transcatheter aortic valve implantation prostheses.