再处理对血管成形术中使用的导丝的化学和形态学特性的影响。
Effects of reprocessing on chemical and morphological properties of guide wires used in angioplasty.
作者信息
Gelamo Rogério Valentim, Sene Eva Cláudia Venâncio de, Paiva Luciana, Oliveira Cristina da Cunha Hueb Barata de, Maltos André Luiz, Schreiner Wido H, Moraes Mário Bica de, Vaz Alfredo R, Moshkalev Stanislav A, Cunha Daniel Ferreira da
出版信息
Rev Bras Cir Cardiovasc. 2013 Jul-Sep;28(3):331-7. doi: 10.5935/1678-9741.20130052.
OBJECTIVE
To investigate the influence of the reprocessing technique of enzymatic bath with ultrasonic cleaning and ethylene oxide sterilization on the chemical properties and morphological structure of polymeric coatings of guide wire for regular guiding catheter.
METHODS
These techniques simulated the routine of guide wire reprocessing in many hemodynamic services in Brazil and other countries. Samples from three different manufacturers were verified by scanning electron microscopy and X-ray photoelectron spectroscopy.
RESULTS
A single or double sterilization of the catheters with ethylene oxide was not associated with morphological or chemical changes. However, scanning electron microscopy images showed that the washing method was associated with rough morphological changes, including superficial holes and bubbles, in addition to chemical changes of external atomic layers of polymeric coating surfaces, as detected by the X-ray photoelectron spectroscopy method, which is compatible with extended chemical changes on catheter surfaces.
CONCLUSION
The reprocessing of the catheters with ethylene oxide was not associated with morphological or chemical changes, and it seemed appropriate to maintain guide wire coating integrity. However, the method combining chemical cleaning with mechanical vibration resulted in rough anatomical and chemical surface deterioration, suggesting that this reprocessing method should be discouraged.
目的
研究超声清洗酶浴再处理技术及环氧乙烷灭菌对普通引导导管导丝聚合物涂层化学性质和形态结构的影响。
方法
这些技术模拟了巴西和其他国家许多血流动力学服务中导丝再处理的常规流程。通过扫描电子显微镜和X射线光电子能谱对来自三个不同制造商的样本进行验证。
结果
导管单次或两次环氧乙烷灭菌与形态或化学变化无关。然而，扫描电子显微镜图像显示，清洗方法与粗糙的形态变化有关，包括表面孔洞和气泡，此外，通过X射线光电子能谱法检测到聚合物涂层表面外部原子层的化学变化，这与导管表面广泛的化学变化相符。
结论
环氧乙烷对导管进行再处理与形态或化学变化无关，维持导丝涂层完整性似乎是合适的。然而，化学清洗与机械振动相结合的方法导致解剖学和化学表面粗糙恶化，表明这种再处理方法应予以摒弃。
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