The Effect of Pulsing on Transverse Ultrasound Efficiency and Chatter.
Am J Ophthalmol
; 183: 107-110, 2017 Nov.
Article
en En
| MEDLINE
| ID: mdl-28860045
ABSTRACT
PURPOSE:
To evaluate the effects of micropulse, long pulse, and continuous ultrasound on transverse ultrasound using Abbott Medical Optics' (AMO) WhiteStar Signature Pro with the Ellips FX handpiece.DESIGN:
In vitro laboratory study.METHODS:
This study was conducted at the John A. Moran Eye Center Laboratory, University of Utah, Salt Lake City, Utah, USA. Porcine lenses were hardened in formalin for 2 hours and equilibrated in basic salt solution (BSS) over a 24-hour period. The lenses were then cubed in 2.0 × 2.0-mm pieces. These pieces were stored in BSS until the time of experimentation. The AMO WhiteStar Signature Pro machine (Abbott Medical Optics) with the Ellips FX handpiece and a 0.9-mm bent Dewey tip with a 30-degree bevel (Microsurgical Technology Inc) were used for phacoemulsification. Three runs of 20 lenses each were performed, measuring efficiency and chatter. Transverse ultrasound varied in the 3 runs and included continuous, 6 ms on/off micropulse, and 50 ms on/off long pulse.RESULTS:
Micropulse was more efficient than long pulse by 43% (P = .00003) and continuous by 42% (P = .000387). There were also less chatter events with micropulse than with long-pulse and continuous ultrasound. However, this difference did not reach significance.CONCLUSION:
The 6 ms on and 6 ms off micropulse transverse 3-dimensional ultrasound is more efficient and produces fewer chatter events than both long-pulse and continuous ultrasound.
Texto completo:
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Bases de datos:
MEDLINE
Asunto principal:
Terapia por Ultrasonido
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Catarata
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Facoemulsificación
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Ondas de Choque de Alta Energía
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Cristalino
Límite:
Animals
Idioma:
En
Revista:
Am J Ophthalmol
Año:
2017
Tipo del documento:
Article