20-, 23-, and 25-gauge vitreous cutters - Performance and characteristics evaluation
20-, 23-, and 25-gauge vitreous cutters - Performance and characteristics evaluation
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DOI：
10.1097/iae.0b013e31815ec2b3
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发表时间：
2008-02-01
影响因子：
3.3
通讯作者：
Schwartz, Steven D.
中科院分区：
文献类型：
--
作者：
Hubschman, Jean Pierre;Gupta, Anurag;Schwartz, Steven D.
目的：对9种玻璃体切割器在两种不同粘度环境下的流速进行测试。测量每个探针的物理特征，如柔韧性和内腔直径。方法：每个探针在两种不同液体中共进行26次吸入试验。通过测量探针尖端在已知恒力作用下的位移，计算出每个探针轴的刚度。解剖所有探头，测量内腔直径。结果：在三种不同的条件下，在三种不同的规格组（25、23和20规格玻璃体切割器）之间，以及在每个规格组内，观察到流速的显著差异。给出了探头内腔直径和刚度特性。结论：真空度、内腔直径和占空比似乎是控制实际流量的关键特征。了解各种探头的流速和硬度可以帮助外科医生做出明智的选择，并可以改善病人的护理。
Purpose: 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.Methods: 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.Results: 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.Conclusion: 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.