Study compares clinical application of femtosecond laser-assisted cataract surgery systems
A recent study compared the LenSx and LenSAR femtosecond laser-assisted cataract surgery systems and found the LenSAR system to be convenient and resulting in less subconjunctival hemorrhage, while the LenSx system had a shorter total vacuum suction duration and lower increase in intraocular pressure.
In this randomized controlled study, 86 patients (90 eyes) were randomized to undergo femtosecond laser-assisted cataract surgery with the LenSx system (n = 45 eyes) or the LenSAR system (n = 45 eyes).
There was a significantly significant difference in the number of docking attempts between each group (P<0.05), with the LenSAR system requiring less attempts. The anterior capsulotomy time was 13.00 (10.00 to 22.00) seconds with the LenSx system compared with 3.00 (1.00 to 3.00) seconds with the LenSAR system (P<0.05).
The femtosecond laser pre-nucleation times were 16.67±3.36 seconds and 12.38±4.36 seconds, and the total femtosecond laser emission times were 30.49±3.53 seconds and 15.36±4.29 seconds, respectively (both P<0.05). The total vacuum suction duration in the LenSx group was (97.23±19.96) seconds compared with 123.76±16.81 seconds in the LenSAR group (P<0.05).
After femtosecond laser surgery, intraocular pressure (IOP) was higher in both groups compared to baseline, with IOP in the LenSAR group at 5.64±5.42 compared with LenSx group at 2.99±4.66 mmHg (P<0.05).
There was a statistically significant difference in the rate of subconjunctival hemorrhage in the LenSx group and in the LenSAR group (33% vs 8.9%).
There were no significant differences in capsulotomy integrity, roundness and centricity of the anterior capsule opening, the rate of anterior capsule opening tear, and the rate of posterior capsule rupture.
Xu YX, Wang Y, Sun M, et al. [Comparative analysis of the clinical application of two femtosecond laser-assisted cataract operation platforms]. Zhonghua Yan Ke Za Zhi. 2020 Jul 11;56(7):530-535. Chinese. doi: 10.3760/cma.j.cn112142-20191113-00571. PMID: 32842336.