晶状体动力学：抽吸流量与真空的比较
Phacodynamics: an aspiration flow vs vacuum comparison.
作者信息
Adams Wesley, Brinton Jason, Floyd Michael, Olson Randall J
机构信息
Department of Ophthalmology and Visual Sciences, University of Utah Health Sciences Center, Salt Lake City, Utah 84132, USA.
出版信息
Am J Ophthalmol. 2006 Aug;142(2):320-2. doi: 10.1016/j.ajo.2006.02.034.
PURPOSE
To compare actual flow and the vacuum necessary to generate that flow for the Advanced Medical Optics Sovereign (Advanced Medical Optics, Santa Ana, California, USA) and the Alcon Legacy (Alcon, Fort Worth, Texas, USA) phacoemulsification machines.
DESIGN
In vitro laboratory study.
METHODS
Flow was collected and machine indicated vacuum noted from 12 ml/min to 40 ml/min in 2 ml/min steps (20-gauge). Nineteen and 20-gauge tips were also compared. Machine indicated vacuum was converted to actual tip vacuum.
RESULTS
Legacy flow (102.4 +/- 3.8% of indicated) was significantly more than Sovereign (96.5 +/- 3.9%; P < .0001). 20-gauge flow was less than 19-gauge flow (96.1% vs 98.6% of indicated, P < .0001). Sovereign had less unoccluded vacuum (70.3 +/- 3.2 mm Hg) than Legacy (89.4 +/- 1.2 mm Hg) at 36 ml/min of flow (P < .0001 for 26 to 36 ml/min of flow).
CONCLUSION
There is unoccluded vacuum at the phaco tip of these systems at 14 ml/min, of flow and at 40 ml/min, this was 112.0 mm Hg for the Legacy.
目的
比较美国加利福尼亚州圣安娜市先进医学光学公司的Sovereign型和美国得克萨斯州沃思堡市爱尔康公司的Legacy型超声乳化仪的实际流量以及产生该流量所需的真空度。
设计
体外实验室研究。
方法
以2毫升/分钟的步长（20号规格）收集从12毫升/分钟到40毫升/分钟的流量，并记录仪器显示的真空度。还比较了19号和20号规格的探头。将仪器显示的真空度转换为实际探头真空度。
结果
Legacy型的流量（为显示值的102.4±3.8%）显著高于Sovereign型（96.5±3.9%；P<.0001）。20号规格的流量低于19号规格的流量（分别为显示值的96.1%和98.6%，P<.0001）。在流量为36毫升/分钟时，Sovereign型的未阻塞真空度（70.3±3.2毫米汞柱）低于Legacy型（89.4±1.2毫米汞柱）（流量在26至36毫升/分钟时，P<.0001）。
结论
这些系统的超声乳化探头在流量为14毫升/分钟时存在未阻塞真空度，在流量为40毫升/分钟时，Legacy型的该真空度为112.0毫米汞柱。
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