Purpose

To test the stiffness and displacement of different vitreous forceps. Physical features and deformation after multiple procedures were also measured.

Methods

Eleven different 23-, 25-, and 27-gauge vitreous forceps were studied. The measurements were repeated loading the probe at different distances from the tip: at the top of the tip and 10 and 20 mm from the tip, respectively. For each probe, 10 successive identical bending tests were performed. The total length and the internal and external diameters of each forceps were also measured.

Results

A total of 330 successive identical bending tests were performed. No progression in deformation after the repeated measurements was recorded (p > 0.05). In each gauge group, displacement differences were detected according to the manufacturing metal properties, the total length, and the thickness of the shaft wall. A minimal adequate model to describes forceps displacements in terms of their significant predictors, such as gauge, model, and load distance from the tip, was created.

Conclusion

We provided a precise assessment of the stiffness and displacement of different vitreous forceps to enable surgeons to select the optimal instrument according to the benefits and limitations of each forceps.

中文翻译：

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23、25 和 27 号钳子刚度和相关位移的比较分析。

目的

测试不同玻璃体钳的刚度和位移。还测量了多次手术后的物理特征和变形。

方法

研究了 11 种不同的 23、25 和 27 号玻璃体钳。在距尖端的不同距离处重复加载探头：分别在尖端顶部和距离尖端 10 和 20 毫米处重复测量。对于每个探针，进行了 10 次连续相同的弯曲测试。还测量了每个镊子的总长度和内径和外径。

结果

总共进行了 330 次连续的相同弯曲试验。记录重复测量后变形没有进展（p  > 0.05）。在每个仪表组中，根据制造金属特性、总长度和井壁厚度检测位移差异。创建了一个最小的足够模型来描述钳子位移的重要预测因素，例如规格、模型和与尖端的负载距离。

结论

我们对不同玻璃体钳的刚度和位移进行了精确评估，使外科医生能够根据每种玻璃体钳的优点和局限性选择最佳器械。