Mackool Richard J, Sirota Marc A
Mackool Eye Institute, Astoria, New York, USA.
J Cataract Refract Surg. 2005 Apr;31(4):812-7. doi: 10.1016/j.jcrs.2004.11.040.
To determine the operating temperature of ultrasonic tips used with the Alcon AdvanTec Legacy, AMO Sovereign WhiteStar, and Bausch & Lomb Millennium phacoemulsification systems.
Mackool Eye Institute, Astoria, New York, New York, USA.
Thermal imaging of ultrasonic tips (Legacy, WhiteStar, and Millennium) was performed in air and in human cadaver eyes using a duty cycle of 33% (WhiteStar) and 50% (Millennium and Legacy). In vitro temperatures were measured with the tip centered in the incision and intentionally decentered against the side of the incision. The stroke length of each instrument was also measured, and the operating frequency of the Legacy was evaluated with the addition of a tangential load.
Open air and in vitro testing demonstrated that tip temperatures with the Legacy were consistently the lowest. Temperatures measured with the WhiteStar and Millennium systems were higher and generally similar to each other. At identical console power settings, the stroke length of the WhiteStar and Millennium tips was longer than that of the Legacy. The frequency of the Legacy handpiece did not change significantly (less than 200 Hz) under conditions of tangential tip loading.
At identical console power settings and similar console duty cycles, the temperature elevation of ultrasonic tips was least for the Legacy and greater for the WhiteStar and Millennium under all conditions. The causes of these findings appear to be the longer stroke length of the WhiteStar and Millennium and the underestimation of the duty cycle with the WhiteStar.
测定与爱尔康（Alcon）AdvanTec Legacy、眼力健（AMO）Sovereign WhiteStar和博士伦（Bausch & Lomb）Millennium超声乳化系统配套使用的超声探头的工作温度。
美国纽约州阿斯托里亚的马库尔眼科研究所。
使用占空比为33%（WhiteStar）和50%（Millennium和Legacy），对超声探头（Legacy、WhiteStar和Millennium）在空气中和人尸体眼中进行热成像。体外温度测量时，探头位于切口中心以及故意偏离中心靠在切口一侧。还测量了每种仪器的冲程长度，并在施加切向负载的情况下评估了Legacy的工作频率。
露天和体外测试表明，Legacy探头的温度始终是最低的。WhiteStar和Millennium系统测量的温度较高，且彼此大致相似。在相同的控制台功率设置下，WhiteStar和Millennium探头的冲程长度比Legacy的长。在切向探头负载条件下，Legacy手持件的频率没有显著变化（小于200 Hz）。
在相同的控制台功率设置和相似的控制台占空比下，在所有条件下，Legacy超声探头的温度升高最小，WhiteStar和Millennium的温度升高较大。这些结果的原因似乎是WhiteStar和Millennium的冲程长度较长，以及WhiteStar对占空比的低估。
