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Comparison of power-free-chop and phaco-chop techniques for moderate nuclei

机译：对中等核的无功斩和验析技术的比较

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To compare the intraoperative and postoperative effects of power-free-chop and phaco-chop techniques for moderate nuclei in phacoemulsification surgery. Sixty patients were evaluated in 2 groups. The power-free-chop technique was performed in Group 1 (30 eyes), and the phaco-chop technique was performed in Group 2 (30 eyes). There were no significant differences between these 2 groups. The cumulative dissipated energy (CDE), time to achieve maximum vision, corneal thickness variation, and time to return to the preoperative values were collected. All parameters were statistically compared in these 2 groups by using the chi-square test and the independent-sample t-test. The CDE was 5.53?±?1.92?J in Group 1 and 7.02?±?1.77?J in Group 2. After the operation, the mean time to recover to the maximum vision was 2.80?±?1.42?days in Group 1 and 3.80?±?1.92?days in Group 2. The mean postoperative corneal thickness increased 36.9?±?14.74?μm in Group 1 and 46.20?±?20.67?μm in Group 2. The mean time to return to preoperative pachymetry values was 3.73?±?1.70?days and 4.83?±?2.11?days in Group 1 and Group 2, respectively. There were significant differences in these parameters between the groups. The power-free-chop technique had fewer negative effects on the corneal endothelium, as less ultrasound power was used for moderate nucleus cases. This can accelerate the functional healing process and the return to preoperative physiologic values.
机译：比较Phacoemumerific手术中的无功斩和钙斩技术对中等核的术中和术后效应。在2组中评估六十名患者。在第1组（30只眼）中进行无功斩技术，并且在第2组（30只眼）中进行验析技术。这两个组之间没有显着差异。收集累积耗散的能量（CDE），获得最大视觉，角膜厚度变化和返回术前值的时间。通过使用Chi-Square测试和独立样品T检验，所有参数在这些2组中统计学比较。 CDE为5.53？±1.92？j在第1组和7.02？±1.77？j组中。操作后，恢复到最大视觉的平均时间为2.80？±1.42？第1次和第1天3.80？±1.92？第2天。平均术后角膜厚度增加36.9？±14.74Ω·14.74Ω·μm，在第2组中±20.67？μm。返回术前偶尔的平均时间为3.73 ？±1.70？天和4.83？±2.11？21.11？分别在第1组和第2组。这些参数在组之间存在显着差异。无功斩技术对角膜内皮具有较少的负面影响，因为使用较少的超声功率用于中度核案例。这可以加速功能性愈合过程和返回术前生理值。

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