Dujovny M, Kossowsky R, Kossovsky N, Diaz F G, Ausman J I
Acta Neurochir (Wien). 1984;72(3-4):257-69. doi: 10.1007/BF01406875.
The intracranial fracture of aneurysm clips due to stress corrosion failure is an increasingly common long term postoperative complication. To study the susceptibility of different clips to this process, we evaluated seven aneurysm clips (Mayfield, Yasargil, Vari-Angle McFadden, Scoville, Heifetz, and Pivot) in vitro. Microstructures, hardness, chemical composition, and susceptibility to stress corrosion failure were all measured by standard metallurgical techniques. Certain clips such as Heifetz, Pivot, and Vari-Angle showed a much greater propensity to stress corrosion failure than the others. As a result of our tests, we recommend that only the clips that show high stress corrosion resistance in in vitro testing should be considered for long term in vivo implantation.
由于应力腐蚀失效导致的动脉瘤夹颅内骨折是一种越来越常见的长期术后并发症。为了研究不同夹子对这一过程的敏感性，我们在体外评估了七种动脉瘤夹（梅菲尔德夹、亚萨吉尔夹、可变角度麦克法登夹、斯科维尔夹、海费茨夹和枢轴夹）。通过标准冶金技术测量了微观结构、硬度、化学成分和应力腐蚀失效敏感性。某些夹子，如希费茨夹、枢轴夹和可变角度夹，比其他夹子更容易发生应力腐蚀失效。根据我们的测试结果，我们建议只有在体外测试中显示出高抗应力腐蚀性的夹子才应考虑用于长期体内植入。
