Difference in torsional phacoemulsification oscillation between a balanced tip and a mini tip using an ultra-high-speed video camera

Abstract

To evaluate the behavior of 2 types of torsional phaco tips, the newly developed balanced tip and the current mini tip, using an ultra-high-speed video camera. Tsukazaki Hospital, Himeji, Japan. Experimental study. The HPV-X2 camera was used to capture how the 2 types of tips with torsional oscillation behave in artificial aqueous humor. The following 5 points on the tips were tracked to compare their behaviors: the tip end (point 1) and distances from the tip end of 1325μm (point 2), 2650μm (point 3), 3975μm (point 4), and 5035μm (point 5). The mean amplitude time for the balanced tip and the mini tip was 16.29 μsec±1.11 (SD) and 15.86±1.21 μsec, respectively (P=.54). The mean amplitude ranges for 2 tips were, respectively, 189.69±4.12μm and 132.89±7.90μm(P=.002) at point 1, 20.54±2.12μm and 23.23±1.68μm(P=.041) at point 2, 42.54±1.36μm and 31.00±1.20μm(P=.002) at point 3, 53.01±8.13μm and 47.40±10.46μm(P=.443) at point 4, and 15.15±2.05μm and 46.40±9.12μm(P=.002) at point5. The results suggest that the balanced tip can greatly increase the amplitude range at the tip end and reduce shaft movement compared with the mini tip, resulting in less damage to the wound and surrounding tissue. Proprietary or commercial disclosures are listed after the references.