McClelland W A, Towler M A, Kaulbach H C, Cantrell R W, Tribble C G, Morgan R F, Edlich R F
Department of Otolaryngology and Head and Neck Surgery, University of Virginia School of Medicine, Charlottesville 22908.
Am Surg. 1990 Oct;56(10):632-8.
Standardized reproducible tests have been developed to determine the biomechanical performance of cardiovascular needles. The parameters used to assess performance were sharpness, resistance to bending, and ductility. Three comparable groups of taper point cardiovascular needles were selected from different manufacturers for these biomechanical studies. The results of this testing demonstrated that needle geometry, needle composition, and the manufacturer were important determinants of needle performance. When needles of comparable size were evaluated, the biomechanical performance of cardiovascular needles manufactured by Ethicon, Inc., were superior to needles produced by other manufacturers. The superior performance characteristics of the cardiovascular needles produced by Ethicon, Inc., were related to their unique stainless steel alloy, American Society for Testing Materials 45500, which has greater yield and tensile strengths than the alloy used by the other manufacturers. Scanning electron microscopic photographs of the Ethicon, Inc., needle revealed a uniform taper point geometry without irregularities. The deformations of the points of cardiovascular needles produced by the other manufacturers could alter their performance.
已开发出标准化的可重复测试来确定心血管针的生物力学性能。用于评估性能的参数有锋利度、抗弯曲性和延展性。从不同制造商处挑选出三组可比较的锥形尖端心血管针用于这些生物力学研究。该测试结果表明，针的几何形状、针的成分以及制造商是针性能的重要决定因素。当评估尺寸相当的针时，Ethicon公司生产的心血管针的生物力学性能优于其他制造商生产的针。Ethicon公司生产的心血管针的卓越性能特征与其独特的不锈钢合金（美国材料与试验协会45500）有关，该合金的屈服强度和抗拉强度比其他制造商使用的合金更高。Ethicon公司针的扫描电子显微镜照片显示出均匀的锥形尖端几何形状，没有不规则之处。其他制造商生产的心血管针尖端的变形可能会改变其性能。
