title: Ultra-high-speed digital video images of vibrations of an ultrasonic tip and phacoemulsification.
abstract: OBJECTIVE
  To visually compare ultrasonic tip vibrations during continuous-mode ultrasound (US), micropulse-mode US, and phacoemulsification using ultra-high-speed digital video imaging.
  
  
  METHODS
  Miyoshi Eye Center, Fukuyama, Hiroshima, Japan.
  
  
  METHODS
  An ultra-high-speed digital video camera was used to record different modes of ultrasonic oscillation. Samples used in the test chamber during phacoemulsification included a pig lens, a human lens nuclear fragment, and a piece of chestnut.
  
  
  RESULTS
  The ultra-high-speed digital video camera clearly captured vibrations of the ultrasonic tip and allowed successful visualization of cavitation during continuous-mode and micropulse-mode US, chattering motion during continuous mode, and hyper-followability during micropulse mode.
  
  
  CONCLUSIONS
  The study visually showed that continuous-mode US produces chattering motion, while micropulse-mode US produces hyper-followability.
authors.affiliation: Miyoshi Eye Clinic, Fukuyama, Hiroshima, Japan. tmiyoshi@urban.ne.jp
authors.forename: Teruyuki
authors.initials: T
authors.lastname: Miyoshi
authors.forename: Hironori
authors.initials: H
authors.lastname: Yoshida
mesh_terms: D000369:Aged, 80 and over; D000818:Animals; D006801:Humans; D007907:Lens Nucleus, Crystalline / Q000601:surgery; D008297:Male; D018918:Phacoemulsification / Q000295:instrumentation*; D010781:Photography / Q000295:instrumentation; D013552:Swine; D014732:Vibration; D014741:Video Recording