Bent versus straight tips in micropulsed longitudinal phacoemulsification

Brian C. Stagg, Isha Gupta, Judd Cahoon, Cecinio Ronquillo, Dallas Shi, Brian Zaugg, Gareth Gardiner, William R. Barlow, Jeff H. Pettey, M. Aabid Farukhi, Jason Jensen, Randall J. Olson

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Objective The aim of this study was to evaluate bent and straight phacoemulsification tips to determine which tip is more efficient in removal of lens fragments, using micropulsed longitudinal ultrasound in phacoemulsification. Design In vitro laboratory study. Methods The John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, was the study setting. Pig lenses hardened in a manner comparable with dense human cataracts were cut into 2-mm cubes and removed with micropulsed longitudinal ultrasound using settings previously shown to be optimally efficient (6 milliseconds on and 6 milliseconds off for a bent tip). To verify this time as most efficient for a straight tip, we also tested times of 5, 6, and 7 milliseconds time on and off. The tips were either straight or with a 20-degree bend. Twenty cubes were used for each comparative run. Results For the straight tip, 6 milliseconds on (1.56 ± 0.815 seconds) was significantly more efficient than 7 milliseconds on (2.45 ± 1.56 seconds, p = 0.001) and not significantly more efficient than 5 milliseconds on (1.69 ± 0.86 seconds, p = 0.43). Five milliseconds off time (1.45 ± 0.76s) was more efficient than 6 milliseconds (2.06 ± 1.37 seconds, p = 0.004) and 7 milliseconds off (2.18 ± 1.24s, p = 0.001). The straight tip was more efficient than the bent tip (1.38 ± 0.83 versus 2.93 ± 2.14 seconds, p = 0.006). Conclusions Results are contrary to accepted common belief. Micropulsed longitudinal phacoemulsification is more efficient with a straight rather than a bent tip.

Original languageEnglish (US)
Article number781
Pages (from-to)354-359
Number of pages6
JournalCanadian Journal of Ophthalmology
Volume50
Issue number5
DOIs
StatePublished - Jan 1 2015

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Phacoemulsification
Lenses
Cataract
Swine

All Science Journal Classification (ASJC) codes

  • Ophthalmology

Cite this

Stagg, B. C., Gupta, I., Cahoon, J., Ronquillo, C., Shi, D., Zaugg, B., ... Olson, R. J. (2015). Bent versus straight tips in micropulsed longitudinal phacoemulsification. Canadian Journal of Ophthalmology, 50(5), 354-359. [781]. https://doi.org/10.1016/j.jcjo.2015.06.003

Bent versus straight tips in micropulsed longitudinal phacoemulsification. / Stagg, Brian C.; Gupta, Isha; Cahoon, Judd; Ronquillo, Cecinio; Shi, Dallas; Zaugg, Brian; Gardiner, Gareth; Barlow, William R.; Pettey, Jeff H.; Aabid Farukhi, M.; Jensen, Jason; Olson, Randall J.

In: Canadian Journal of Ophthalmology, Vol. 50, No. 5, 781, 01.01.2015, p. 354-359.

Research output: Contribution to journalArticle

Stagg, BC, Gupta, I, Cahoon, J, Ronquillo, C, Shi, D, Zaugg, B, Gardiner, G, Barlow, WR, Pettey, JH, Aabid Farukhi, M, Jensen, J & Olson, RJ 2015, 'Bent versus straight tips in micropulsed longitudinal phacoemulsification', Canadian Journal of Ophthalmology, vol. 50, no. 5, 781, pp. 354-359. https://doi.org/10.1016/j.jcjo.2015.06.003
Stagg BC, Gupta I, Cahoon J, Ronquillo C, Shi D, Zaugg B et al. Bent versus straight tips in micropulsed longitudinal phacoemulsification. Canadian Journal of Ophthalmology. 2015 Jan 1;50(5):354-359. 781. https://doi.org/10.1016/j.jcjo.2015.06.003
Stagg, Brian C. ; Gupta, Isha ; Cahoon, Judd ; Ronquillo, Cecinio ; Shi, Dallas ; Zaugg, Brian ; Gardiner, Gareth ; Barlow, William R. ; Pettey, Jeff H. ; Aabid Farukhi, M. ; Jensen, Jason ; Olson, Randall J. / Bent versus straight tips in micropulsed longitudinal phacoemulsification. In: Canadian Journal of Ophthalmology. 2015 ; Vol. 50, No. 5. pp. 354-359.
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abstract = "Objective The aim of this study was to evaluate bent and straight phacoemulsification tips to determine which tip is more efficient in removal of lens fragments, using micropulsed longitudinal ultrasound in phacoemulsification. Design In vitro laboratory study. Methods The John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, was the study setting. Pig lenses hardened in a manner comparable with dense human cataracts were cut into 2-mm cubes and removed with micropulsed longitudinal ultrasound using settings previously shown to be optimally efficient (6 milliseconds on and 6 milliseconds off for a bent tip). To verify this time as most efficient for a straight tip, we also tested times of 5, 6, and 7 milliseconds time on and off. The tips were either straight or with a 20-degree bend. Twenty cubes were used for each comparative run. Results For the straight tip, 6 milliseconds on (1.56 ± 0.815 seconds) was significantly more efficient than 7 milliseconds on (2.45 ± 1.56 seconds, p = 0.001) and not significantly more efficient than 5 milliseconds on (1.69 ± 0.86 seconds, p = 0.43). Five milliseconds off time (1.45 ± 0.76s) was more efficient than 6 milliseconds (2.06 ± 1.37 seconds, p = 0.004) and 7 milliseconds off (2.18 ± 1.24s, p = 0.001). The straight tip was more efficient than the bent tip (1.38 ± 0.83 versus 2.93 ± 2.14 seconds, p = 0.006). Conclusions Results are contrary to accepted common belief. Micropulsed longitudinal phacoemulsification is more efficient with a straight rather than a bent tip.",
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