Department of Mechanical Engineering, Temple University, Philadelphia, PA 19122, United States.
Department of Mechanical Engineering, Temple University, Philadelphia, PA 19122, United States.
Med Eng Phys. 2021 Sep;95:104-110. doi: 10.1016/j.medengphy.2021.07.008. Epub 2021 Aug 11.
This research aims to study the effect of a composite coating comprised of polydopamine (PDA), polytetrafluoroethylene (PTFE), and activated Carbon on the insertion mechanics of surgical needles in tissues i.e., polyvinyl chloride (PVC) tissue phantom and bovine kidney. A needle insertion and extraction test system was designed and constructed to measure the insertion and extraction forces. It was found that the composite coating on the needle surface decreases the maximum average insertion and extraction forces by 62% and 64%, respectively, when tested in PVC tissue phantom and by 49% and 30%, respectively, in bovine kidney tissue. Additionally, an Atomic Force Microscope study was performed to characterize the surface properties of the coated needles. It was found that the composite coating reduced the friction force on the needle surface by 65.7%. The decrease in these forces is critical in minimizing tissue damage and decreasing needle path deviation or deflection during percutaneous procedures.
本研究旨在研究由聚多巴胺（PDA）、聚四氟乙烯（PTFE）和活性炭组成的复合涂层对手术针在组织中的插入力学性能的影响，即聚氯乙烯（PVC）组织体模和牛肾。设计并构建了一个用于测量插入和拔出力的针插入和拔出测试系统。结果发现，与 PVC 组织体模相比，针表面的复合涂层可使最大平均插入力和拔出力分别降低 62%和 64%，而在牛肾组织中，最大平均插入力和拔出力分别降低 49%和 30%。此外，还进行了原子力显微镜研究，以表征涂层针的表面特性。结果发现，复合涂层使针表面的摩擦力降低了 65.7%。这些力的降低对于在经皮手术过程中最小化组织损伤和减少针路径偏差或偏转至关重要。
