Comparison of a torsional and a standard tip with a monitored forced infusion phacoemulsification system

Tyler Boulter, Jason Jensen, Michael D. Christensen, Nathan G. Lambert, Brian Zaugg, Brian C. Stagg, Jeff H. Pettey, Randall J. Olson

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Purpose To compare the relative efficiency and chatter of the 30-degree 0.9 mm Kelman tip (standard tip) and Ozil Intrepid Balanced tip (torsional tip) with identical optimum settings. Setting John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA. Design Experimental study. Methods Porcine nuclei were fixed in formalin and cut into 2.0 mm cubes. Lens cubes were phacoemulsified with standard and torsional tips at 60% and 100% torsional amplitude with 0%, 25%, 50%, 75%, and 100% longitudinal power with monitored forced infusion. Experiments were performed at a constant vacuum, aspiration rate, and intraocular pressure. Results Linear regression showed increased efficiency with up to 75% longitudinal power at 60% torsional amplitude for both tips (P =.046 standard; P =.0093 torsional). Longitudinal did not significantly increase efficiency at 100% torsional power for either tip. Torsional tips were on average 29% more efficient than standard tips throughout the range tested (P <.0001), and 100% torsional power was on average 45% more efficient than 60% torsional power (P =.0028). Chatter was minimal except at 100% longitudinal power, which was greater than at 75% longitudinal power (P <.0001). At 100% longitudinal power, torsional tips had more chatter than standard tips (at 60% torsional, P <.0001; at 100% torsional, P =.0022). Conclusions Increasing up to 75% longitudinal power increased the efficiency at 60% torsional for standard and torsional tips. Torsional tips were more efficient than standard tips. Chatter was generally minimal. Torsional tips showed more chatter than standard tips at 100% longitudinal power. Financial Disclosure None of the authors has a financial or proprietary interest in any material or method mentioned.

Original languageEnglish (US)
Pages (from-to)613-617
Number of pages5
JournalJournal of Cataract and Refractive Surgery
Volume42
Issue number4
DOIs
StatePublished - Apr 1 2016

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Phacoemulsification
Efficiency
Power (Psychology)
Disclosure
Vacuum
Intraocular Pressure
Formaldehyde
Lenses
Linear Models
Research Design
Swine

All Science Journal Classification (ASJC) codes

  • Surgery
  • Ophthalmology
  • Sensory Systems

Cite this

Comparison of a torsional and a standard tip with a monitored forced infusion phacoemulsification system. / Boulter, Tyler; Jensen, Jason; Christensen, Michael D.; Lambert, Nathan G.; Zaugg, Brian; Stagg, Brian C.; Pettey, Jeff H.; Olson, Randall J.

In: Journal of Cataract and Refractive Surgery, Vol. 42, No. 4, 01.04.2016, p. 613-617.

Research output: Contribution to journalArticle

Boulter, Tyler ; Jensen, Jason ; Christensen, Michael D. ; Lambert, Nathan G. ; Zaugg, Brian ; Stagg, Brian C. ; Pettey, Jeff H. ; Olson, Randall J. / Comparison of a torsional and a standard tip with a monitored forced infusion phacoemulsification system. In: Journal of Cataract and Refractive Surgery. 2016 ; Vol. 42, No. 4. pp. 613-617.
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abstract = "Purpose To compare the relative efficiency and chatter of the 30-degree 0.9 mm Kelman tip (standard tip) and Ozil Intrepid Balanced tip (torsional tip) with identical optimum settings. Setting John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA. Design Experimental study. Methods Porcine nuclei were fixed in formalin and cut into 2.0 mm cubes. Lens cubes were phacoemulsified with standard and torsional tips at 60{\%} and 100{\%} torsional amplitude with 0{\%}, 25{\%}, 50{\%}, 75{\%}, and 100{\%} longitudinal power with monitored forced infusion. Experiments were performed at a constant vacuum, aspiration rate, and intraocular pressure. Results Linear regression showed increased efficiency with up to 75{\%} longitudinal power at 60{\%} torsional amplitude for both tips (P =.046 standard; P =.0093 torsional). Longitudinal did not significantly increase efficiency at 100{\%} torsional power for either tip. Torsional tips were on average 29{\%} more efficient than standard tips throughout the range tested (P <.0001), and 100{\%} torsional power was on average 45{\%} more efficient than 60{\%} torsional power (P =.0028). Chatter was minimal except at 100{\%} longitudinal power, which was greater than at 75{\%} longitudinal power (P <.0001). At 100{\%} longitudinal power, torsional tips had more chatter than standard tips (at 60{\%} torsional, P <.0001; at 100{\%} torsional, P =.0022). Conclusions Increasing up to 75{\%} longitudinal power increased the efficiency at 60{\%} torsional for standard and torsional tips. Torsional tips were more efficient than standard tips. Chatter was generally minimal. Torsional tips showed more chatter than standard tips at 100{\%} longitudinal power. Financial Disclosure None of the authors has a financial or proprietary interest in any material or method mentioned.",
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N2 - Purpose To compare the relative efficiency and chatter of the 30-degree 0.9 mm Kelman tip (standard tip) and Ozil Intrepid Balanced tip (torsional tip) with identical optimum settings. Setting John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA. Design Experimental study. Methods Porcine nuclei were fixed in formalin and cut into 2.0 mm cubes. Lens cubes were phacoemulsified with standard and torsional tips at 60% and 100% torsional amplitude with 0%, 25%, 50%, 75%, and 100% longitudinal power with monitored forced infusion. Experiments were performed at a constant vacuum, aspiration rate, and intraocular pressure. Results Linear regression showed increased efficiency with up to 75% longitudinal power at 60% torsional amplitude for both tips (P =.046 standard; P =.0093 torsional). Longitudinal did not significantly increase efficiency at 100% torsional power for either tip. Torsional tips were on average 29% more efficient than standard tips throughout the range tested (P <.0001), and 100% torsional power was on average 45% more efficient than 60% torsional power (P =.0028). Chatter was minimal except at 100% longitudinal power, which was greater than at 75% longitudinal power (P <.0001). At 100% longitudinal power, torsional tips had more chatter than standard tips (at 60% torsional, P <.0001; at 100% torsional, P =.0022). Conclusions Increasing up to 75% longitudinal power increased the efficiency at 60% torsional for standard and torsional tips. Torsional tips were more efficient than standard tips. Chatter was generally minimal. Torsional tips showed more chatter than standard tips at 100% longitudinal power. Financial Disclosure None of the authors has a financial or proprietary interest in any material or method mentioned.

AB - Purpose To compare the relative efficiency and chatter of the 30-degree 0.9 mm Kelman tip (standard tip) and Ozil Intrepid Balanced tip (torsional tip) with identical optimum settings. Setting John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA. Design Experimental study. Methods Porcine nuclei were fixed in formalin and cut into 2.0 mm cubes. Lens cubes were phacoemulsified with standard and torsional tips at 60% and 100% torsional amplitude with 0%, 25%, 50%, 75%, and 100% longitudinal power with monitored forced infusion. Experiments were performed at a constant vacuum, aspiration rate, and intraocular pressure. Results Linear regression showed increased efficiency with up to 75% longitudinal power at 60% torsional amplitude for both tips (P =.046 standard; P =.0093 torsional). Longitudinal did not significantly increase efficiency at 100% torsional power for either tip. Torsional tips were on average 29% more efficient than standard tips throughout the range tested (P <.0001), and 100% torsional power was on average 45% more efficient than 60% torsional power (P =.0028). Chatter was minimal except at 100% longitudinal power, which was greater than at 75% longitudinal power (P <.0001). At 100% longitudinal power, torsional tips had more chatter than standard tips (at 60% torsional, P <.0001; at 100% torsional, P =.0022). Conclusions Increasing up to 75% longitudinal power increased the efficiency at 60% torsional for standard and torsional tips. Torsional tips were more efficient than standard tips. Chatter was generally minimal. Torsional tips showed more chatter than standard tips at 100% longitudinal power. Financial Disclosure None of the authors has a financial or proprietary interest in any material or method mentioned.

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