Ebner Martina, Mariacher Siegfried, Januschowski Kai, Boden Katrin, Seuthe Anna-Maria, Szurman Peter, Boden Karl Thomas
Knappschaft Eye Clinic, Knappschaft Hospital Saar GmbH, Sulzbach, Germany.
Centre for Ophthalmology, University Eye Hospital Tuebingen, Tuebingen, Germany.
Br J Ophthalmol. 2017 Aug;101(8):1138-1142. doi: 10.1136/bjophthalmol-2016-309890. Epub 2017 May 25.
To evaluate intraocular pressure (IOP) using the application of a novel liquid patient interface for femtosecond laser-assisted cataract surgery with the FEMTO LDV Z8.
IOP was evaluated in enucleated porcine eyes prior, during and after the application of the Femto LDV Z8 liquid patient interface (Ziemer Ophthalmic Systems, Switzerland) using intracameral cannulation (n=20), intravitreal cannulation (n=20), rebound tonometry (n=20) and indentation tonometry (n=20). Pressure was assessed prior vacuum, during vacuum (30 s, 1 min, 2 min, 3 min) and after releasing the vacuum (1 min and 2 min). Two groups with different predefined vacuum levels (350 mbar, 420 mbar) were investigated.
Mean intracameral pressure (±SD) increased during vacuum application from 20 mm Hg to 52.00 mm Hg (±6.35mm Hg; p=0.005) and 45.18 mmHg (±4.34 mm Hg; p=0.005) for the 420 mbar and the 350 mbar vacuum levels, respectively. Mean intravitreal pressure increased from 20 mm Hg to 25.60 mm Hg (±9.85 mm Hg; p=0.058) and 28.10 mm Hg (±2.54 mm Hg; p=0.059) for the 420 mbar and the 350 mbar vacuum levels, respectively. Pressure values from indentation and rebound tonometry were in between intracameral and intravitreal values. Mean intracameral IOP was 18.1% higher (p=0.019) in the 420 mbar group compared with the 350 mbar group.
During vacuum application of the liquid patient interface of the Femto LDV Z8 for femtosecond laser-assisted cataract surgery, IOP values were higher in the anterior chamber compared with the intravitreal pressure measurements. The higher predefined vacuum level (350 mbar vs 420 mbar) resulted in significant higher intracameral IOP.
使用一种新型液体患者界面，结合FEMTO LDV Z8飞秒激光辅助白内障手术，评估眼内压（IOP）。
使用前房内插管（n = 20）、玻璃体内插管（n = 20）、回弹眼压计（n = 20）和压陷眼压计（n = 20），在应用Femto LDV Z8液体患者界面（瑞士齐默眼科系统公司）之前、期间和之后，对摘除的猪眼进行IOP评估。在抽真空前、抽真空期间（30秒、1分钟、2分钟、3分钟）和释放真空后（1分钟和2分钟）评估压力。研究了两组具有不同预定义真空水平（350毫巴、420毫巴）的情况。
在抽真空期间，420毫巴和350毫巴真空水平下，前房平均压力（±标准差）分别从20毫米汞柱增加到52.00毫米汞柱（±6.35毫米汞柱；p = 0.005）和45.18毫米汞柱（±4.34毫米汞柱；p = 0.005）。420毫巴和350毫巴真空水平下，玻璃体内平均压力分别从20毫米汞柱增加到25.60毫米汞柱（±9.85毫米汞柱；p = 0.058）和28.10毫米汞柱（±2.54毫米汞柱；p = 0.059）。压陷眼压计和回弹眼压计的压力值在前房和玻璃体内压力值之间。420毫巴组的前房平均IOP比350毫巴组高18.1%（p = 0.019）。
在使用Femto LDV Z8液体患者界面进行飞秒激光辅助白内障手术的抽真空过程中，前房的IOP值高于玻璃体内压力测量值。较高的预定义真空水平（350毫巴对420毫巴）导致前房IOP显著升高。
