Thermal evaluation of two phacoemulsification systems
| Autor: | Brian Zaugg, Kevin Garff, Isha Gupta, Randall J. Olson, Bradley S. Henriksen, Brian C. Stagg, William R. Barlow, Gareth L. Gardiner, Jeff H. Pettey |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
Incisional Burn Microsurgery Hot Temperature Thermometers medicine.medical_treatment Models Biological Cataract Salt lake Body Temperature High-Energy Shock Waves 03 medical and health sciences 0302 clinical medicine Cadaver Lens Crystalline medicine Humans Phacoemulsification business.industry Ultrasound Thermal Conductivity General Medicine Cadaver model Surgery Ophthalmology Thermography Thermometer 030221 ophthalmology & optometry business 030217 neurology & neurosurgery Biomedical engineering |
| Zdroj: | Canadian journal of ophthalmology. Journal canadien d'ophtalmologie. 51(1) |
| ISSN: | 1715-3360 |
| Popis: | To compare thermal profiles of new transversal ultrasound power modulation to torsional ultrasound in an artificial chamber and cadaver eye.Laboratory investigation.John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, was the study setting. Temperature increase after 30 seconds was measured at the needle midshaft in an artificial chamber and at maximal friction point in a cadaver eye. Ellips FX (transverse) was tested at 100% power, as was Signature with micropulse settings (6 milliseconds on and off). OZil (torsional only) was tested at 100% power in the artificial chamber and cadaver eye. Runs were completed with aspiration blocked. Temperature was continuously measured on the phacoemulsification sleeve using a microthermistor probe connected to the BAT-10 multipurpose thermometer, with an accuracy of ±0.1°C.Transversal FX had a greater temperature increase than micropulse (p0.001) and torsional (p0.001). Micropulse had a greater temperature increase than torsional (p0.001). The cadaver eye had a greater temperature increase than the artificial chamber for torsional (p0.001).Higher heat accumulation and potential for incisional burn occurred with the cadaver model than with the artificial chamber, suggesting the need for caution when using 100% torsional ultrasound with aspiration blocked. Transversal FX generated more heat than was reported originally. Further study is needed to determine the incidence of incisional burn with varied power settings for this new model. Micropulse generated more heat than previous reports, but the increased efficiency is likely to negate potentially increased incisional burn risk. |
| Databáze: | OpenAIRE |
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