Hubschman Jean Pierre, Gupta Anurag, Bourla Dan H, Culjat Martin, Yu Fei, Schwartz Steven D
Jules Stein Eye Institute, Department of Ophthalmology, and Center for Advanced Surgical and Interventional Technology (CASIT), University of California, David Geffen School of Medicine, Los Angeles, CA 90095, USA.
Retina. 2008 Feb;28(2):249-57. doi: 10.1097/IAE.0b013e31815ec2b3.
The flow rate of nine vitreous cutters was tested in two different viscosity environments. Physical features of each probe, such as flexibility and internal lumen diameter, were measured.
For each probe, a total of 26 aspiration tests were performed in two different liquids. The stiffness of the shaft of each probe was calculated by measuring the displacement of the tip of the probe under a known constant force. All the probes were dissected and the internal lumen diameter was measured.
Significant differences in flow rates were observed among the three separate conditions, among the three different gauge groups (25-, 23-, and 20-gauge vitreous cutter), and also within each gauge group. Internal lumen diameters and probe stiffness characteristics are presented.
Vacuum, internal lumen diameter, and duty cycle seem to be the critical features governing actual flow rate. Knowledge of flow rate and stiffness of the various probes may aid surgeons in making an educated choice and may improve patient care.
在两种不同的粘度环境中测试了九种玻璃体切割器的流速。测量了每个探头的物理特征，如柔韧性和内腔直径。
对于每个探头，在两种不同的液体中总共进行了26次抽吸测试。通过在已知恒定力下测量探头尖端的位移来计算每个探头轴的刚度。所有探头均被解剖并测量内腔直径。
在三种不同条件之间、三个不同规格组（25G、23G和20G玻璃体切割器）之间以及每个规格组内均观察到流速存在显著差异。列出了内腔直径和探头刚度特征。
真空、内腔直径和占空比似乎是控制实际流速的关键因素。了解各种探头的流速和刚度可能有助于外科医生做出明智的选择，并可能改善患者护理。
