Abstract:

Objective  To study the efficiency and safety of a hybrid  ultrasound power mode. Methods  The age-related cataracts were randomly divided into reciprocating the phacoemulsification  mode （conventional ultrasound mode group ）and the torsional combined with reciprocating phacoemulsification mode (hybrid mode group) and the torsional mode group. The intraoperative data of Ultrasound Time (UST) and Cumulative Dissipated Energy (CDE) were measured and compared. Postoperative outcome measures including corneal clarity, the best corrected visual acuity (BCVA), central endothelial corneal cell counts, and the corneal endothelial cells loss rate were also measured and compared. Results  The differences among the three groups in the UST、 CDE、 degree of postoperative corneal edema、 the best-corrected visual acuity(BCVA)of postoperative 1 day and 7 days、 corneal endothelial counts and corneal endothelial of postoperative 7 days and 30 days showed significant differences (P＜0.05). There were no differences between the hybrid mode group and the torsional mode group(P＞0.05). Conclusion  The hybrid  ultrasound mode is similar to the torsional mode, which not only can reduce  intra-operative ultrasound energy and ultrasonic time, but also can improve the emulsification efficiency and significantly reduce  intraocular trauma. The hybrid ultrasound mode  is safer and more effective than the conventional ultrasound mode, which is superior to the torsional mode in reducing blocked pipes and mitigating the anterior chamber pipe fog.

Key words: Torsional； Cataract； Phacoemulsification