Influence of electro-polishing characteristics on needle-tissue interaction forces
Influence of electro-polishing characteristics on needle-tissue interaction forces
复制标题
电抛光特性对针-组织相互作用力的影响
DOI：
10.1080/20421338.2017.1359446
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
R. Kuppuswamy
中科院分区：
文献类型：
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作者：
Mubita Kapui;R. Kuppuswamy
为了改善304不锈钢的表面织构，对不锈钢进行了电抛光处理。电解质为体积比为2：3：5的H2O、H2SO 4（98%）和H3 PO 4（85%）的混合物。使用重量分析法和触针轮廓测定法对样品进行分析。据观察，在电解抛光过程中去除的材料可以控制在6%的误差范围内。所获得的表面显示出改善的清洁度和降低的表面粗糙度（Ra）。然后使用相同的参数对皮下注射针进行电抛光，目的是减少针插入组织期间的力。使用SEM分析针尖。使用硅胶体模作为组织替代品对针头进行测试。对于所有电抛光针，插入期间的力较小，在0.66 A/cm 2的电流密度下获得的结果最一致。在不同的插入深度的针插入力的理论模型。
The electro-polishing process was applied to stainless steel 304 with the aim of improving its surface texture. The electrolyte was a mixture of H2O, H2SO4 (98%) and H3PO4 (85%) at a volume ratio of 2:3:5. Gravimetric analysis and stylus profilometry were used to analyze the samples. It was observed that the material removed during the electro-polishing process could be controlled to an error limit of 6%. The surfaces obtained showed improved cleanness and reduced surface roughness (Ra). Hypodermic needles were then electro-polished using the same parameters with the aim of reducing forces during needle insertion into tissue. The needle tips were analyzed using a SEM. The needles were tested using silicone phantoms as a tissue substitute. The forces during insertion were less for all the electro-polished needles, with the most consistent results obtained at a current density of 0.66 A/cm2. A theoretical model of the needle insertion forces at different insertion depths was developed.