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An uItrasonic planar cutting tool based on silicon and driven by PMN-PT d<sub>31</sub> plates has been designed, fabricated and characterized. To solve the issue of resonant frequency shirt and electrical impedance variation of the tool in high power applications, a driving system which can track the resonance and stabilize the vibration amplitude has been(More)
Ultrasonic cutting tools based on a mass-spring configuration of a drive transducer are widely used in surgery. However, the weight and self-heating of this configuration are weaknesses. An alternative approach is to use a planar tool to which piezoelectric drive components are bonded directly. This paper details the design and characterization of such a(More)
Numerical simulations of traveling wave solutions in a drift paradox inspired diffusive delay population model Z. Jackiewicz a,b, H. Liu a, B. Li c, Y. Kuang a,∗ a Department of Mathematics, Arizona State University, Tempe, AZ 85287, USA b Department of Applied Mathematics, AGH University of Science and Technology, Kraków, Poland c Department of(More)
Needle insertion with ultrasound actuation has been proven as an effective way to reduce the penetration force and needle deflection within soft tissue, facilitating operational manoeuverability and targeting accuracy in cancer biopsy and regional anaesthesia. In such percutaneous procedures, loading conditions from adjacent soft tissue alter the needle(More)
Resonant frequency shift can occur during operation in the application of ultrasonic actuating device. It affects the resonance amplitude and therefore the performance of the device. To solve this problem, an automatic frequency tracking system based on embedded technology was developed. It has the ability to automatically track the resonant frequency shift(More)
Ultrasonic scalpels based on the conventional mass-spring configuration of piezoelectric transducers are widely used in procedures such as oral, hepatic, and pancreatic surgery. However, the weight and self-heating of this configuration are weaknesses. To address these, an alternative approach can be adopted which utilizes a planar configuration of a(More)
A novel ultrasonically-actuated tool has been designed and fabricated to allow safe and deliberate surgical incision. Though the tool has been designed specifically for ultrasonic cutting of tissues, modifications to its structure and material properties may lead to its use in other medical applications. The design comprises a simple geometry with sharp tip(More)
Ultrasonic scalpels based on the conventional mass-spring configuration of piezoelectric transducers are widely used in procedures such as oral, hepatic, and pancreatic surgery. However, the weight and self-heating of this configuration are weaknesses. To address these, an alternative approach can be adopted which utilizes a planar configuration of a(More)
An ultrasonic microcutter is an alternative approach to conventional ultrasonic instruments actuated by sandwich piezoelectric transducers for surgery. This paper reports high-power behavior of a microcutter actuated by the piezocrystal lead magnesium niobate-lead titanate (PMN-PT), defining its practical performance and the feasibility of PMNPT actuation(More)