Temperature in the anterior chamber during phacoemulsification.
Hisaharu Suzuki1, Kotaro Oki1, Tsutomu Igarashi1
1From the Department of Ophthalmology (Igarashi, Shiwa, Takahashi), Nippon Medical School, Nippon Medical School, Musashikosugi Hospital, Kawasaki City, Kanagawa, and private clinic (Oki), Tokyo, Japan.
Phacoemulsification settings significantly impact aqueous humor temperature. Surgeons must carefully manage ultrasound oscillation modes and vacuum settings to prevent intraocular tissue damage during cataract surgery.
Area of Science:
- Ophthalmology
- Surgical Technology
- Biomedical Engineering
Background:
- Cataract surgery relies on phacoemulsification, a technology using ultrasound energy.
- Effective management of intraocular temperature is crucial to prevent thermal injury to ocular tissues.
Purpose of the Study:
- To compare the impact of two phacoemulsification devices (Stellaris 28.5 kHz and Whitestar Signature 40 kHz) on aqueous humor temperature.
- To evaluate how different ultrasound oscillation modes and settings affect intraocular temperature during cataract surgery.
Main Methods:
- An experimental study was conducted using porcine eyes.
- Aqueous humor temperature was measured in the anterior chamber during ultrasound oscillation under five distinct conditions.
- Temperature probes were utilized to record real-time temperature changes.
Main Results:
- Continuous longitudinal oscillation modes led to rapid increases in aqueous humor temperature.
- Pulse and elliptical oscillation modes effectively suppressed temperature elevation.
- Increasing vacuum settings helped lower anterior chamber temperature by optimizing aspiration.
Conclusions:
- Phacoemulsification settings critically influence intraocular temperature.
- Surgeons must be vigilant in monitoring and adjusting phacoemulsification parameters to mitigate the risk of thermal damage to the cornea and other anterior chamber structures.
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