ArticleClinical ophthalmology (Auckland, N.Z.)2016
Laboratory assessment of thermal characteristics of three phacoemulsification tip designs operated using torsional ultrasound.
Article in Clinical ophthalmology (Auckland, N.Z.), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- Micro-interventional pre-treatment for nucleus disassembly in the setting of non-cavitating sonic lensectomy: real-world evidence study in 512 cases.BMC ophthalmology · 2025Article
- Energy Output Variability Among Phacoemulsification Tips Using Calorimetry.Medical devices (Auckland, N.Z.) · 2025Article
- Temperature Change of Ophthalmic Viscosurgical Devices in a Bi-Chamber Set-Up at a Flow of 0 and 20mL/min.Clinical ophthalmology (Auckland, N.Z.) · 2023Article
- Eyelid and scleral thermal injury following phacoemulsification in silicone oil: a case report.BMC ophthalmology · 2022Article
- Comparisons of the energy efficiency and intraocular safety of two torsional phacoemulsification tips.BMC ophthalmology · 2022Article
Corrections and comments
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Authors and funding
1 author at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeUltrasound activation of phacoemulsification (phaco) tips can create considerable thermal energy that may increase the risk of tissue damage during cataract surgery. The purpose of this study was to define the thermal profiles of three phaco tip designs in simulated surgical conditions.
methodsIn this laboratory investigation, sleeved phaco tips (mini-flared Kelman(®) tip with aspiration bypass port and Intrepid(®) Balanced Tip with aspiration bypass port, and MST A1 bent-mini phaco tip (without aspiration bypass) were tested using an ultrasonic phaco device operated in torsional mode at power levels of 50%, 75%, and 100% amplitude. An automated fixture applied a 30 g load to simulate compression against the incision site, leading to friction between the silicone sleeve and the titanium tip. Temperature was recorded by high rate infrared imaging under conditions of free flow and occlusion, which was simulated by clamping the aspiration line. Data were summarized using descriptive statistics.
resultsBaseline temperatures of ~26°C were observed for all tips. During ultrasonic operation at 50%, 75%, and 100% amplitude, temperatures were lower for the mini-flared and balanced tips versus the bent-mini tip, both when load was applied and during occlusion. The bent-mini tip reached temperatures as high as 70°C during occlusion with load when operated at 100% amplitude, whereas the mini-flared tip remained <50°C, and the balanced tip remained <36°C in all test conditions. For the mini-flared and balanced tips, temperature increases during operation were not markedly different from free flow and no-load conditions when occlusion or frictional events were simulated.
conclusionIn all experiments for each tip design, increasing ultrasound power was associated with greater increases in tip temperature. Tip temperatures increased with applied load, but marked temperature increases during occlusion were observed only with the bent-mini tip. The balanced tip produced minimal thermal peaks in all tests.
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