Elijah Isaac, Song Sang-Eun
Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, USA.
Department of Mechanical Engineering, University of Akron, Akron, OH, USA.
SM Radiol J. 2024;7(1). Epub 2024 Jun 25.
Prostate cancer ranks as the second most common cause of cancer-related mortality among males. A template guided core biopsy procedure is an essential component of prostate cancer diagnosis. Various factors influence the quality of the histological sample that is produced from the biopsy, including tissue fragmentation, needle insertion speed, needle deflection, and sheath cutting speed. In instances where a biopsy core fails to meet established clinical standards, an additional core extraction is necessary, resulting in heightened patient discomfort and an increased risk of infection. The objective of this study is to examine alternative configurations for the needle guide in order to optimize for the reduction of needle guide frictional forces while providing adequate guidance towards a target. A simulation of this interaction using different configurations of the needle guide was designed using SIMULA Abaqus, and a Finite Element Analysis was performed to observe the friction force between the needle and guide. The results showed that configurations with contact points oriented parallel to the direction of insertion exhibited the least recorded frictional forces. The study demonstrated that configurations which provided decreased contact surface compared to the control needle guide resulted in lower friction force. These findings advocate for the optimization of the conventional biopsy needle guide to reduce the contact area between the needle and guide inner surface, potentially reducing the number of passes required to obtain a histologically viable core specimen and mitigating the risk of patient infection.
前列腺癌是男性癌症相关死亡的第二大常见原因。模板引导的核心活检程序是前列腺癌诊断的重要组成部分。多种因素会影响活检所产生的组织学样本的质量，包括组织破碎、针插入速度、针偏转和鞘切割速度。在活检核心不符合既定临床标准的情况下，需要额外提取核心，这会导致患者不适加剧和感染风险增加。本研究的目的是检查针引导器的替代配置，以便在为目标提供足够引导的同时，优化减少针引导器摩擦力。使用SIMULA Abaqus设计了使用不同针引导器配置的这种相互作用的模拟，并进行了有限元分析以观察针与引导器之间的摩擦力。结果表明，接触点与插入方向平行的配置记录的摩擦力最小。该研究表明，与对照针引导器相比，提供减小的接触表面的配置导致更低的摩擦力。这些发现主张优化传统活检针引导器，以减少针与引导器内表面之间的接触面积，有可能减少获得组织学上可行的核心样本所需的穿刺次数，并降低患者感染风险。
