New high-amplitude ultrasonic apparatuses with adaptive systems for therapy and surgery

Abstract

The use of ultrasound in surgery provides high thera peutic effect against the background of minimal injury to biological tissues. In some cases, these requirements are contradictory, and the optimal range of parameters depends on various factors. Ultrasound with inappropriate parameters is ineffective and even dangerous; ultrasound with too high intensity may cause overheating or destruc tion of healthy tissues; ultrasound with too low intensity decreases treatment efficacy and increases operation time.A new generation of ultrasonic apparatuses for ther apy and surgery should combine simple circuitry with high reliability, flexibility in surgery control, and adaptiv ity to variable parameters of the object of application.A new generation of high amplitude ultrasonic apparatuses for therapy and surgery was developed at the Automatika Plant in collaboration with Omsk State Technical University and Omsk State Medical Academy (Russia). The apparatuses are based on modern circuitry, NOSFET and IGBT technologies. The apparatuses are equipped with adaptive adjustment and control systems increasing their reliability, operational safety, and service life.The Tonzilor M, Gineton M, and Yarus ultrasonic apparatuses for therapy and surgery provide four inde pendent adaptive regulation systems. Some of the systems take into account the load level providing stability, load ing capacity, and phase disbalance compensation accord ing to variable parameters of the object of application. Some adaptive systems are designed to control internal processes in the apparatus and provide reliability, opera tional safety, and service life of the apparatuses.The Tonzilor M ultrasonic apparatus (Fig. 1) was developed to substitute the Tonzilor 2 ultrasonic appara tus for conservative and surgical treatment of laryngopha ryngeal diseases. The therapeutic effect of the apparatus is based on low frequency ultrasonic energy, which is applied to damaged organs and tissues both in direct con tact and through liquid medicines. The Tonzilor M ultra sonic apparatus can also be used in other areas of medi cine for sanitation of infected wounds. The Tonzilor M ultrasonic apparatus can be used in inpatient and outpa tient settings.The Yarus high amplitude low frequency surgical ultrasonic apparatus (Fig. 2) is designed to provide con tact degrading (bone cutting, disaggregation of spongy bones and soft tissues) and non degrading (contact hemostasis, bone capillary draining, spongy bone drying before cementing) effects, as well as contactless hydro acoustic (cleaning of bone and tissue surfaces, cavitation hemostasis, antiseptic treatment of surfaces) and ultra sonic airborne effects (dosed application of antibiotic solutions and antiseptics onto treated surfaces).The Yarus ultrasonic apparatus can be used in inpa tient and outpatient settings, as well as in the field or under conditions of natural disasters and technogenic accidents.Specifications of the Yarus ultrasonic apparatus: -ultrasound frequency, 40 42 kHz; -oscillation amplitude of working edge...

The study of the possibility of drug dissolution of gallbladder calculi

“…For therapeutic purposes, ultrasound with the frequency of 0.7 MHz and higher is most often used for effective effects on tissues (Novikov et al, 2007;Xin et al, 2016;Welsher et al, 2003). Therefore, the frequency of 0.88 MHz was chosen for the experimental studies.…”