Application of burst mode for phacoemulsification of hard nucleus cataract

Objective To abserve the effect of burst mode on phacoemulsification of hard nucleus cataract.Method Four handreds and eighteen eyes(400patients) were rardomly divided into groups(pulse group and burst group).Actual phaco power,Phaco time,visual acuity,corneal endothelial cell loss and other complications were recorded.Result The actual phaco power in the two groups was 22.42%±5.65% and 6.30%±1.28%,respectively.Phaco time in two groups was(202±25)s and(45±6)s, respectively.In comparison of the power and time between the two groups,the difference between the pulse group and burst group was significant(P0.001).Visual acuity was significant improved in all two groups postoperatively.The difference between the pulse and burst group was statistically significant(P0.005).Endothelial cell loss postcperatively was lower in burst group than that in the pulse group was significan(P0.005).Serious corneal edema occurred more frequently in the pulse group than that in the burst group.Conclusions Burst Phaco mode reduced phaco time and actual phaco power consumed during phacoemulsification and reduced the loss of corneal endothelial cell and corneal edema.It is safe to use the burst phacoemulsification clinically.