Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
권호 표지

Cavitation Effects on Radiated Sounds and Break Efficiency Induced by Piezoelectric Extracorporeal Shock Wave Lithotripter

ESWL 장치에 의한 방사음 및 파쇄효율에 미치는 캐비테이션의 영향

  • 장윤석 (부경대학교 공과대학 전기공학과)
  • Published : 2001.04.01
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Abstract

The effectiveness of extracorporeal shock wave lithotripter for the therapy of calculus has been well known in the field of urology. There are many studies about the performance of that and the influence into human body. Among them, it is an impertant issue that cavitation is always deal with shock wave. A medium of the shock wave is related to the cavitation phenomenon. In this paper, therefore, we analysis the spectra of radiated sounds and the break efficiency on focal region due to the medium of shock wave. The results show that the cavitation bubbles produce a harmful on the break efficiency and the stability of the radiated sounds due to the ESWL.

결석 파쇄에 ES지 장치가 이용되기 시작한 이래, 장치의 성능 및 장치에서 발생시킨 충격파가 생체에 미치는 영향등에 관한 연구가 다수 행해지고 있다. 그 중의 하나가 충격파가 전달되는 곳에는 항상 거론되는 캐비테이션 문제이다. 본 연구에서는 압전식 ESWL 장치로 대상물을 파쇄한다는 가정하에, 그 때의 매질을 캐비테이션이 미치는 영향과 관련지어 둘로 구분한다. 그것에 따라 각 매질에서의 방사음을 관측하고, 매질에 따른 파쇄효율과의 관계를 분석한 결과를 제시한다. 본 논문의 결과들은 캐비테이션 기포의 발생율이 작은 탈기수쪽이 방사음에 있어서도 분산성이 작고, 파쇄효율면에 있어서도 안정된 점을 확실히 나타내고 있다.

Keywords

References

  1. J. Urology v.136 Measurement of Shock Wave Pressures Uesd for Lithotripsy P.T. Hunter;B. Finlayson;R.J. Hirko;W.C. Voreck;R. Walker;S. Walck;M. Nasr
  2. The Urologic Clinics of North American v.10 no.4 Shock Wave Treatment for Stones in the Upper Urinery Tract Ch. Chaussy;E. Schmidt
  3. 日本機械學會論文集(B 編) v.57 no.539 水中微小爆發によるフォ一ヵッツソグ醫療應用ヘの基礎硏究 高山利喜;小野寺收;小原哲郞;壓原正明;北山水
  4. Jpn. J. Appl. Phys. v.33 no.5B Power Difference in Spectrum of Sound Radiation before and after Break of Phantom by Piezoelectric Extracorporeal Shock Wave Lithotriptor H. Kanai;Y.S. Jang;N. Chubachi;Y. Tanahahi
  5. Jpn. J. Appl. Phys. v.35 no.5B Measurement and Analysis of Vibrations on Surface of Phantom Induced by Piezoelectric Extracorporeal Shock Wave Lithotriptor Y.S. Jang;T. Akasaka;M. Sato;H. Kanai;N. Chubachi
  6. Ultrasound Med. and Biol. v.15 Investigation of Cavitaion in Floating Media by Lithortipter Shock Wave Both In Vitro and In Vivo A.R. Williams;M. Delius;D.L. Miller'Schwarze
  7. Ultrasound Med. and Biol. v.13 no.2 Acoustic Cavitation Generated by an Extracorporeal Shock Wave Lithotriptor A.J. Coleman;J.E. Saunders;L.A. Crum;M. Dyson
  8. J. Acoust. Soc. America v.86 no.1 A Theoretical Study of Cavitation Generated by an Extracorporeal Shock Wave Lithotriptor C.C. Church
  9. Proc. Int. Symp. on Cavitation Interaction of an Air Bubble with a Shock Wave Generated by a Microexplosion in Water N, Sanadal;J. Ikeuchi;K. Takayama;O. Onodera
  10. 17th Int. Sym. on Shock Waves and Shock Tubes Acoustic Cavitation Bubbles in the Kidney Induced by Focused Shock Waves N. Ioritani;M. Kuwahara;K. Kambo;K. Taguchi;T. Saito;S. Shirai;S. Orikasa;K. Takayama;P.A. Lush
  11. キャビテ一ショソ工學 山崎卓
  12. 日本東北大學博士論文 水中擧動波フォ一ヵッツソグの醫療應用に關する基礎硏究 小原哲郞
  13. Ultrasound Med. and Biol. v.17 On the Mechanism of Kindey Stone Distintegration by Acoustic Shock Waves N.G. Holmer;L.O. Almquist;T.G. Hertz;A. Holm;E. Lindstedt;H.W. Person;C.H. Hertz
  14. Encycolpedia of Acoustic Malcolm J. Croker