Saratov JOURNAL of Medical and Scientific Research

ultrasonic aspiration

The thermal safety of system for ultrasonic aspiration of lens cortex

Year: 2018, volume 14 Issue: №4 Pages: 919-922
Heading: Ophtalmology Article type: Original article
Authors: Idrisova G.M.
Organization: Bashkir State Medical University of the Russian Health Care
Summary:

The purpose of work is an experimental evaluation of the thermal safety of system for aspiration of lens cortex with the possibility of additional dosed low power ultrasonic. Material and Methods. The system for aspiration of cortex with the possibility of additional dosed low power ultrasonic consists of a specially designed ultrasonic instrument with a 21G tip and irrigation instrument with a 21G tip. Remote infrared thermometry (thermal imager Testo 882, Germany) was performed. In experiments a pig eyes were used (n=10). The eye was fixed in a titanium eye-holder, the tip of the ultrasonic instrument was inserted up through a 1.1 mm paracentesis on the meridian for 9 hours, the irrigation tip on the meridian for 3 hours. The initial temperature was recorded after irrigation and aspiration activation. Then ultrasound was activated (power 30%, activation time 10 s) and the final temperature was recorded. The rise in temperature was estimated as the difference between the final and initial temperatures. The software Testo IRSoft version 4.3 was used to process the images. Results. The average temperature rise in all experiment was 5.1±1.4°C. The maximum recorded temperature in the experiments were 33.5°C. Conclusion. Critical level of temperature for corneal burns was not reached in all of experiments. Conducted thermometric studies allow to conclude that the developed system for aspiration of lens cortex with the possibility of additional dosed low power ultrasonic is thermally safe.

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2018_4-2_919-922.pdf732.86 KB

Clinical performance of system for ultrasonic cortex aspiration during phacoemulsification

Year: 2018, volume 14 Issue: №4 Pages: 811-815
Heading: Ophtalmology Article type: Original article
Authors: Aznabaev В.М., Dibaev T.I., Mukhamadeev T.R., Idrisova G.M.
Organization: Bashkir State Medical University of the Russian Health Care, ZAO Optimedservis
Summary:

Purpose: to study the performance and safety of the use of system for cortex aspiration with the possibility of additional dosed low power ultrasound during phacoemulsification. Material and Methods. The comparative evaluation of developed system for cortex aspiration with the possibility of additional dosed low power ultrasound (main group, n=36, ophthalmological surgical platform Optimed Profi) and the traditional system for cortex aspiration (control group, n=40, ophthalmological surgical platform Centurion Vision System) were performed. Results. Using the system for cortex aspiration decreases mean time of cortex aspiration. In the main group the mean time of cortex aspiration was 72.6±24.3 s, in the control group 93.9±48.0 s (p<0.05). Intraoperative complications were not observed in the main group. Posterior capsule rupture was detected during the cortex aspiration in 1 patient (2.5%) in the control group. Conclusion. The system for cortex aspiration with the possibility of additional dosed low power ultrasound allows decrease the time of cortex aspiration, to create conditions for a safer removal of cortex, compared with traditional technology.

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2018_4-2_811-815.pdf636.91 KB