在双腔设置中，流量为0和20mL/分钟时眼科粘弹手术器械的温度变化
Temperature Change of Ophthalmic Viscosurgical Devices in a Bi-Chamber Set-Up at a Flow of 0 and 20mL/min.
作者信息
Jensen Nathan R, Ungricht Emilie L, Harris Jacob T, Zaugg Brian, Barlow William R, Murri Michael S, Olson Randall J, Pettey Jeff H
机构信息
Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, UT, 84132, USA.
University of Utah School of Medicine, Salt Lake City, UT, 84132, USA.
出版信息
Clin Ophthalmol. 2023 Feb 10;17:555-560. doi: 10.2147/OPTH.S389136. eCollection 2023.
PURPOSE
To understand the role of ophthalmic viscosurgical devices (OVDs) in corneal incision contracture (CIC). Specifically, the aim was to evaluate with the tip of the phacoemulsification needle free of OVD, how various OVDs near the tip and sleeve may transmit thermal energy to the incision site.
METHODS
A small chamber was filled with balanced saline solution (BSS), and a thin membrane was placed on the surface. OVD was placed atop the membrane. A temperature probe was placed in the OVD, while the handpiece pierced the membrane. The experiment was run both with and without flow and vacuum. Temperature measurements were gathered for each of the OVDs at four separate time points at 0 and 20mL/min flow.
RESULTS
As expected, there was a more pronounced temperature increase in all test groups with no fluid flow. While the temperature increase was not significantly different from BSS for any of the OVDs tested at either 0 or 20mL/min, Viscoat showed the most variable results at both flow settings.
CONCLUSION
As long as the phaco tip is not in OVD, residual OVD near the incision is not exothermic and so not an additional risk for CIC.
目的
了解眼科粘弹剂（OVD）在角膜切口挛缩（CIC）中的作用。具体而言，目的是通过超声乳化针头尖端不接触OVD的情况下，评估靠近尖端和套管的各种OVD如何将热能传递到切口部位。
方法
一个小腔室充满平衡盐溶液（BSS），并在表面放置一层薄膜。将OVD放置在薄膜上方。将温度探头置于OVD中，同时手持器械穿刺薄膜。在有和没有流体流动及真空的情况下进行实验。在流速为0和20mL/min时，在四个不同时间点收集每个OVD的温度测量数据。
结果
正如预期的那样，在所有无流体流动的测试组中温度升高更为明显。虽然在流速为0或20mL/min时，任何测试的OVD的温度升高与BSS相比均无显著差异，但Viscoat在两种流速设置下的结果变化最大。
结论
只要超声乳化针头不在OVD中，切口附近残留的OVD不会放热，因此不是CIC的额外风险。
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