From the University of Arizona College of Medicine-Phoenix (Kabbara), Phoenix, Arizona, and the Department of Ophthalmology and Visual Sciences (Heczko, Bernhisel, Barlow, Zaugg, Pettey, Olson), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
From the University of Arizona College of Medicine-Phoenix (Kabbara), Phoenix, Arizona, and the Department of Ophthalmology and Visual Sciences (Heczko, Bernhisel, Barlow, Zaugg, Pettey, Olson), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
J Cataract Refract Surg. 2018 Nov;44(11):1378-1383. doi: 10.1016/j.jcrs.2018.05.031. Epub 2018 Sep 7.
To examine the role of high vacuum and aspiration settings on efficiency using a transversal ultrasound (US) machine.
John A. Moran Eye Center Laboratory, University of Utah, Salt Lake City, Utah, USA.
Experimental study.
Porcine lens nuclei were incubated in formalin for 2 hours and then cut into 2.0 mm cubes. Phacoemulsification was performed using the Whitestar Signature machine. Settings were bottle height 50 cm, on-time 6 milliseconds, and off-time 6 milliseconds. One hundred percent power was used for all 240 runs. Tested parameters were aspiration of 50 mL/min and 60 mL/min and vacuum of 500, mm Hg, 600 mm Hg, and 650 mm Hg.
With continuous US, increasing aspiration from 50 mL/min to 60 mL/min significantly increased efficiency (23%). Increasing vacuum from 500 mm Hg to 650 mm Hg and from 600 mm Hg to 650 mm Hg significantly increased efficiency (20.2% and 13.6%, respectively). Higher vacuum and aspiration parameters did not influence the incidence of chatter events. In the micropulse US group, there was no significant efficiency increase with increasing vacuum or aspiration levels. There was a significant efficiency increase of continuous over micropulse US at an aspiration setting of 60 mL/min and vacuum settings of 600 mm Hg and 650 mm Hg.
As aspiration and vacuum increased, efficiency increased under continuous transverse US. No significant efficiency improvement occurred at high aspiration and vacuum settings under micropulse US. At 60 mL/min aspiration and more than 600 mm Hg vacuum, continuous power was significantly more efficient than micropulse transverse US.
使用横切面超声（US）机检查高真空和抽吸设置对效率的作用。
美国犹他州盐湖城犹他大学约翰·A·莫兰眼科中心实验室。
实验研究。
将猪晶状体核在福马林中孵育 2 小时，然后切成 2.0 毫米的立方体。使用 Whitestar Signature 机器进行超声乳化。设置为瓶高 50 厘米，开启时间 6 毫秒，关闭时间 6 毫秒。所有 240 次运行均使用 100%功率。测试参数为抽吸速度为 50 mL/min 和 60 mL/min，以及真空度为 500、600 和 650 mmHg。
在持续 US 下，从 50 mL/min 增加到 60 mL/min 的抽吸速度显著提高了效率（23%）。从 500 mmHg 增加到 650 mmHg 和从 600 mmHg 增加到 650 mmHg 的真空度也显著提高了效率（分别为 20.2%和 13.6%）。更高的真空和抽吸参数并不影响 chatter 事件的发生率。在微脉冲 US 组中，增加真空度或抽吸水平都没有显著提高效率。在 60 mL/min 的抽吸速度和 600 mmHg 和 650 mmHg 的真空度下，连续 US 的效率明显高于微脉冲 US。
随着抽吸和真空度的增加，连续横切 US 下效率增加。在微脉冲 US 下，高抽吸和真空度设置不会显著提高效率。在 60 mL/min 的抽吸速度和超过 600 mmHg 的真空度下，连续功率明显比微脉冲横切 US 更有效率。
