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2009•Clinical ophthalmologyOpen access

The advantage of using burst mode in phacoemulcification for patient with hard nucleus cataract

LI Min-cha, Zhu Chun-lin

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Abstract

Objective To investigate the advantage of using burst mode in phacoemulcification for patient with hard nucleus cataract.Methods 70 patients(70 eyes) with hard nucleus cataract were randomly divided into two groups: continuous mode group(35 eyes) and burst mode group(35 eyes).The average power,actual ultrasound time and effective phaco time was recorded.The best visual acuity was measured at 1st,3rd,7th day after operation.The central corneal endothelial cell density at 1st week and 1st month after operation.To observe operative complications and the presence of anterior chamber flare.Results The best corrected visual acuity in burst mode group is better than in continous mode group at 1st,3rd day after operation,and the difference is statistically significant in two groups.The best corrected visual acuity in burst mode group is better than in continous mode group at 7th day after operation,and the difference is not statistically significant(P0.05),however the distribution of visual acuity between 0.8~1.0 in burst mode group(57.14%)was slightly higher than in continous group(40%),and the difference is significant(P0.05).The actual ultrasound time,average power and effective phaco time in burst mode group is significantly lower than continuous mode group(P0.05).The central corneal endothelial cell density of two groups at the 1st week after operation is lower than it before.The central endothelial cell density of burst mode group is higher than continous mode group,and the difference is statistically significant(P0.05).And the result at 1st month after operation.The endothelial cell was continuously slightly losing in two groups after the surgery during the follow-up.No complications such as rupture of posterior capsule,hyphema occured in two groups during the operations.Conclusion Using burst mode during phacoemulcification can reduce the ultrasound energy,shorten the operation time,decrease the damage to corneal endothelial cell and rise the postoperative visual acuity.

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What this paper is about

Objective To investigate the advantage of using burst mode in phacoemulcification for patient with hard nucleus cataract.Methods 70 patients(70 eyes) with hard nucleus cataract were randomly divided into two groups: continuous mode group(35 eyes) and burst mode group(35 eyes).The average power,actual ultrasound time and effective phaco time was recorded.The best visual acuity was measured at 1st,3rd,7th day after operation.The central corneal endothelial cell density at 1st week and 1st month after operation.To observe operative complications and the presence of anterior chamber flare.Results The best corrected visual acuity in burst mode group is better than in continous mode group at 1st,3rd day after operation,and the difference is statistically significant in two groups.The best corrected visual acuity in burst mode group is better than in continous mode group at 7th day after operation,and the difference is not statistically significant(P0.05),however the distribution of visual acuity between 0.8~1.0 in burst mode group(57.14%)was slightly higher than in continous group(40%),and the difference is significant(P0.05).The actual ultrasound time,average power and effective phaco time in burst mode group is significantly lower than continuous mode group(P0.05).The central corneal endothelial cell density of two groups at the 1st week after operation is lower than it before.The central endothelial cell density of burst mode group is higher than continous mode group,and the difference is statistically significant(P0.05).And the result at 1st month after operation.The endothelial cell was continuously slightly losing in two groups after the surgery during the follow-up.No complications such as rupture of posterior capsule,hyphema occured in two groups during the operations.Conclusion Using burst mode during phacoemulcification can reduce the ultrasound energy,shorten the operation time,decrease the damage to corneal endothelial cell and rise the postoperative visual acuity.

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Available abstract

Objective To investigate the advantage of using burst mode in phacoemulcification for patient with hard nucleus cataract.Methods 70 patients(70 eyes) with hard nucleus cataract were randomly divided into two groups: continuous mode group(35 eyes) and burst mode group(35 eyes).The average power,actual ultrasound time and effective phaco time was recorded.The best visual acuity was measured at 1st,3rd,7th day after operation.The central corneal endothelial cell density at 1st week and 1st month after operation.To observe operative complications and the presence of anterior chamber flare.Results The best corrected visual acuity in burst mode group is better than in continous mode group at 1st,3rd day after operation,and the difference is statistically significant in two groups.The best corrected visual acuity in burst mode group is better than in continous mode group at 7th day after operation,and the difference is not statistically significant(P0.05),however the distribution of visual acuity between 0.8~1.0 in burst mode group(57.14%)was slightly higher than in continous group(40%),and the difference is significant(P0.05).The actual ultrasound time,average power and effective phaco time in burst mode group is significantly lower than continuous mode group(P0.05).The central corneal endothelial cell density of two groups at the 1st week after operation is lower than it before.The central endothelial cell density of burst mode group is higher than continous mode group,and the difference is statistically significant(P0.05).And the result at 1st month after operation.The endothelial cell was continuously slightly losing in two groups after the surgery during the follow-up.No complications such as rupture of posterior capsule,hyphema occured in two groups during the operations.Conclusion Using burst mode during phacoemulcification can reduce the ultrasound energy,shorten the operation time,decrease the damage to corneal endothelial cell and rise the postoperative visual acuity.

Key concepts: Medicine, Burst mode (computing), Ophthalmology, Significant difference, Visual acuity, Mode (computer interface), Ultrasound, Nucleus

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