Effect of chamber stabilization software on efficiency and chatter in a porcine lens model

Abstract

To evaluate the effects of the use of programmable chamber stabilization software (Chamber Stabilization Environment) settings on efficiency and chatter in a porcine lens model. John A. Moran Eye Center Laboratory, University of Utah, Salt Lake City, Utah, USA. Experimental study. Porcine eyes were dissected and the lenses extracted. The lenses were then hardened and processed for the experiment. Phacoemulsification of the lens fragments was performed with the Whitestar Signature Pro with the Whitestar handpiece and a 0.9mm straight Dewey tip with a 30-degree bevel. All arms of the study were run in peristaltic mode with 50mL/minute aspiration, 100cm bottle height, and on 100% power. The chamber stabilization software setting was used for each of the 4 study arms with a maximum vacuum of 500mm Hg. Arm 1 included 20 runs with the up time set to 2000milliseconds. Arm 2 was performed with similar settings but with an up time of 0millisecond. Arms 3 and 4 were run with up times of 1000milliseconds and 500milliseconds, respectively. The mean efficiency time of each run was as follows: 0millisecond=1.4seconds, 500milliseconds=0.95seconds, 1000milliseconds=0.88seconds, 2000milliseconds=0.93seconds. When compared with 0millisecond, each of the other arms were significantly faster. Chatter events were comparable between the study arms. The chamber stabilization software does not decrease efficiency when compared with full vacuum on if at least 500milliseconds of up time is maintained.