Evaluation of intraocular pressure fluctuations with differing phacoemulsification approaches.
Simultaneous two-camera video tracings of phacoemulsification surgery and intraocular pressure fluctuations were made. The fluctuations were transmitted to a quartz pressure transducer through a chamber maintainer that was plugged into the anterior chamber. The transducer was connected to a monitor and recorder calibrated to measure pressure variations between -8.6 and +60 mm Hg. Using common audio for synchronization, the pressure tracings were keyed over the surgical videos and combined in a single film. High, medium, and low inflow volume techniques used by many surgeons exhibiting commensurately higher or lower intraocular pressure fluctuations were scrutinized. Methods to increase inflow volume without a proportionate pressure increase were devised.
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D002387:Cataract Extraction / Q000379:methods*; D005069:Evaluation Studies as Topic; D006801:Humans; D006874:Hydrostatic Pressure; D007429:Intraocular Pressure / Q000502:physiology*; D007552:Isotonic Solutions; D014160:Transducers, Pressure; D014741:Video Recording
D007552:Isotonic Solutions