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Energy Output Variability Among Phacoemulsification Tips Using Calorimetry.

Ivan A Cardenas1,2, Reiker G Ricks1,2, Jenna L Jensen1,2

  • 1Department of Ophthalmology and Visual Sciences, John a Moran Eye Center, University of Utah, Salt Lake City, UT, USA.

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|October 9, 2025
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Summary
This summary is machine-generated.

Different phacoemulsification (phaco) tips significantly impact thermal energy output during cataract surgery. Balanced tips generated the most heat, while Dewey tips produced the least, influencing potential thermal injury risks.

Keywords:
cataract surgeryoutputthermal injuryultrasound modevariability

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Area of Science:

  • Ophthalmology
  • Surgical Technology
  • Biomedical Engineering

Background:

  • Phacoemulsification is a common cataract surgery technique.
  • Thermal energy generated by phacoemulsification tips can cause ocular tissue damage.
  • Understanding tip-specific thermal output is crucial for surgical safety.

Purpose of the Study:

  • To quantify and compare the thermal energy output of different phacoemulsification tips.
  • To determine if variations in tip design affect heat production during surgery.

Main Methods:

  • Utilized calorimetry to measure thermal energy output.
  • Tested Alcon Centurion with Infiniti OZil handpiece using balanced, hybrid, and Dewey A1 mini tips.
  • Standardized settings (100% power, continuous torsional/longitudinal ultrasound, 0mmHg vacuum, 12mL/min flow) for 1-minute trials.

Main Results:

  • Significant differences in thermal energy output (Joules) were observed between all tested tips in both ultrasound modes.
  • Balanced tips exhibited the highest thermal output; Dewey tips showed the lowest.
  • Longitudinal mode increased thermal output for hybrid tips but decreased it for Dewey tips.

Conclusions:

  • Phacoemulsification tip design significantly influences thermal energy production.
  • Findings offer insights into the mechanisms of thermal injury during cataract surgery.
  • Surgeons should consider tip-specific thermal variability to mitigate risks.