Development of a Multilayer Iliac Crest Numerical Model for Simulating Honeybee Stinger-Inspired Hollow Needle Insertion

R. Nadda, R. Repaka, A. Sahani
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Abstract

Minimally invasive biopsy needles are frequently inserted into the desired body regions while performing the bone marrow biopsy (BMB) procedure. The key problem with needle insertion in tissues is that the insertion force damages the tissue and deviates the needle path, leading the needle to miss the desired target and reducing biopsy sample integrity. To address these shortcomings, the present work developed a unique bioinspired barbed biopsy needle design that reduces insertion/extraction forces and needle deflection. This study established several design parameters, including barb geometry and shape (viz., the height of barb, barbed front angle, barbed back angle, and length of portion containing barbs), and examined the impact of these factors on insertion/extraction force and deflection. A Lagrangian surface-based non-linear finite element (FE) approach has been used to numerically simulate the BMB procedure on a three-dimensional (3D) multilayered heterogeneous model of the human iliac crest. The proposed honeybee stinger-inspired needle design has been found to reduce both insertion and extraction forces because of the decreased frictional surface of the biopsy needle.
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基于多层髂骨数值模型的蜜蜂螫刺式空心针插入模拟
在进行骨髓活检(BMB)过程中,微创活检针经常插入所需的身体区域。在组织中插入针头的关键问题是,插入力会破坏组织并使针头路径偏离,导致针头偏离预期目标并降低活检样本的完整性。为了解决这些缺点,本研究开发了一种独特的生物启发刺活检针设计,可以减少插入/拔出力和针挠度。本研究建立了几个设计参数,包括倒刺的几何形状(即倒刺高度、倒刺前角、倒刺后角和含倒刺部分的长度),并研究了这些因素对插拔力和挠度的影响。采用基于拉格朗日曲面的非线性有限元(FE)方法,在三维(3D)多层非均匀人体髂骨模型上对BMB过程进行数值模拟。研究发现,由于活检针的摩擦表面减少,因此提出的受蜜蜂螫针启发的针头设计可以减少插入和拔出力。
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