Method for Calculating an Ultrasonic Scalpel with a 1½-Wave Acoustic Scheme and Enhanced Cavitation Surface

Authors

DOI:

https://doi.org/10.20535/RADAP.2025.101.%25p

Keywords:

ultrasound, ultrasonic cavitation, sound-capillary effect, elasticity, scalpel, glaucoma, trabecula

Abstract

Ultrasonic phacoemulsifiers and scalpels have transformed cataract surgery, enabling minimally invasive procedures through small incisions while minimizing trauma to ocular tissues. Despite its potential to clean the trabecular meshwork of the anterior chamber angle, restore its elasticity, and reduce intraocular pressure, applying ultrasonic cavitation in glaucoma surgery has not been fully implemented so far. A mathematical model of an ultrasonic scalpel for an ophthalmic phacoemulsifier used in glaucoma treatment has been developed in this study, based on a 1½-wave vibrational drive for longitudinal displacements with a symmetric piezoelectric transducer. This model enabled the calculation of acoustic longitudinal dimensions and the simulation of its operation at the resonant frequency. The reciprocating-rotational oscillations of the scalpel needle are achieved by incorporating helical grooves on the surface of the larger-diameter stage of the first ultrasonic velocity transformer, which is in direct contact with the piezoceramic transducer. To enhance the convenience of surgical intervention and reduce the risk of damaging internal eye structures, the tip of the ultrasonic scalpel needle is angled at approximately 15°. The simulation results determined the resonant frequencies of the ultrasonic scalpel with a straight and angled tip, which were 48,373 Hz and 48,702 Hz, respectively. Additionally, the vibration mode of the angled needle tip was identified, exhibiting both longitudinal and bending components, confirming the proposed concept of using an angled tip to improve surgical convenience and reduce the risk of injury to internal eye structures.The implementation of the developed ultrasonic scalpel for glaucoma treatment addresses a significant scientific and applied challenge in modern ophthalmology and mechanical engineering.

Author Biographies

  • S. V. Sharhorodskyi, National Technical University of Ukraine “Ihor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine

    Postgraduate Student of the Applied Fluid Mechanics and Mechatronics Department

  • O. F. Luhovskyi, National Technical University of Ukraine “Ihor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine

    Professor of the Applied Fluid Mechanics and Mechatronics Department

  • A. D. Lavrinenkov, National Technical University of Ukraine “Ihor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine

    Associate Professor of the Department of Aircraft Manufacturing Engineering

  • I. V. Shargorodska, Bogomolets National Medical University, Kyiv, Ukraine

    Professor of the Department of Ophthalmology and Optometry of Postgraduate Education

  • N. V. Kolot, Bogomolets National Medical University, Kyiv, Ukraine

    Postgraduate student of the Department of Ophthalmology and Optometry of Postgraduate Education

References

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Published

2025-09-30

Issue

No. 101 (2025)

Section

Radioelectronics Medical Technologies

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Copyright (c) 2025 С. В. Шаргородський , О. Ф. Луговський , А. Д. Лавріненков , І. В. Шаргородська , Н. М. Колот

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How to Cite

“Method for Calculating an Ultrasonic Scalpel with a 1½-Wave Acoustic Scheme and Enhanced Cavitation Surface” (2025) Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, (101), pp. 18–27. doi:10.20535/RADAP.2025.101.%p.

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