非接触式手持眼压计式接触镜在飞秒激光辅助白内障手术中的稳定性。
Stability of a non-applanating handheld liquid patient interface for femtosecond laser-assisted cataract surgery.
机构信息
Knappschaft Eye Clinic Sulzbach, Knappschaft Hospital Saar, An der Klinik 10, 66280, Sulzbach, Germany.
Centre for Ophthalmology, University Eye Hospital Tuebingen, Schleichstr. 12, 72076, Tuebingen, Germany.
出版信息
Int Ophthalmol. 2020 Oct;40(10):2683-2689. doi: 10.1007/s10792-020-01450-0. Epub 2020 Jun 1.
PURPOSE
A stable and reliable vacuum is crucial for the correct planning and performance of femtosecond laser-assisted cataract surgery (FLACS) in order to avoid complications such as suction loss and cyclorotation. This study investigates, for the first time, the impact of different vacuum levels on the stability of the application of a liquid patient interface for FLACS in view of break-away forces.
METHODS
Break-away forces were measured using a multifunctional material testing machine with a mounted digital manometer. Sixteen porcine eyes were docked to the patient interface of a femtosecond laser platform (FEMTO LDV Z8), and the impact of different vacuum levels between 300 and 500 mbar investigated.
RESULTS
Mean break-away forces for each vacuum level were as follows: 1.78 N (± 0.58 N) for 300 mbar; 2.24 N (± 0.68 N) for 350 mbar; 2.66 N (± 0.68 N) for 400 mbar; 2.86 N (± 0.77 N) for 420 mbar; and 3.49 N (± 0.86 N) for 500 mbar.
CONCLUSION
The stability increases with the vacuum in a nearly linear manner. Vacuum levels higher than 500 mmHg and lower than 350 mmHg are not recommended for FLACS.
目的
为避免负压吸引损失和眼环旋转等并发症，稳定可靠的真空环境对飞秒激光辅助白内障手术（FLACS）的正确规划和实施至关重要。本研究首次探讨了不同真空度对用于 FLACS 的液体患者接口稳定性的影响，主要考虑脱离力。
方法
使用配备数字压力计的多功能材料试验机测量脱离力。将 16 只猪眼固定在飞秒激光平台（FEMTO LDV Z8）的患者接口上，研究了 300 至 500 mbar 之间不同真空度的影响。
结果
每个真空度的平均脱离力如下：300 mbar 时为 1.78 N（±0.58 N）；350 mbar 时为 2.24 N（±0.68 N）；400 mbar 时为 2.66 N（±0.68 N）；420 mbar 时为 2.86 N（±0.77 N）；500 mbar 时为 3.49 N（±0.86 N）。
结论
稳定性随真空度的增加呈近线性增加。FLACS 不建议使用真空度高于 500mmHg 或低于 350mmHg。
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