Collaborative Research: Investigation of Vibratory Cutting Mechanics with Novel Compliant Needle Geometry for Precision Needle Positioning Machine

该合作研究奖支持振动组织切割力学的基础研究，以提高癌症治疗和其他医疗程序中体内针插入位置的准确性。本研究将确定振动组织切割力如何与振动参数和针切割边缘几何形状相关，固定几何形状和利用顺应性工具几何形状的新概念。振动组织切割力学将使用精密针定位机进行研究，该定位机振动不同顺应性针尖几何形状的针。本研究亦将探讨如何利用雷射微加工及多轴电火花线切割来制造小尺寸复杂针尖几何形状。结果将提供振动组织切割力学和新的微细加工技术的知识。振动组织切割的知识将带来创新的微创医疗器械设计的发展，提高手术效率，减少患者创伤，降低医疗成本。获得的微细加工知识将导致新的基于激光的微制造和多轴电火花加工技术。这些制造技术将使未来开发的微结构医疗设备，具有更大的范围内的尺寸，形状和材料比传统的微制造技术可以生产。宾夕法尼亚州立大学和北卡罗来纳州州立大学之间的这一合作研究项目也将对这些大学的工程教育产生积极影响，并加强跨学科的研究合作。

This collaborative research award supports fundamental research on vibratory tissue cutting mechanics to improve needle insertion placement accuracy inside the body for cancer treatment and other medical procedures. This research will determine how vibrational tissue cutting force is related to vibrational parameters and needle cutting edge geometry with both fixed geometry and utilizing the novel concept of compliant tool geometry. Vibratory tissue cutting mechanics will be investigated with a precision needle positioning machine that vibrates needles of varying compliant needle tip geometries. This research will also investigate how laser micro machining and multi-axis wire electrical discharge machining can be employed to produce small scale intricate needle tip geometries. Results will provide knowledge of vibratory tissue cutting mechanics and novel microfabrication techniques. Knowledge of vibratory tissue cutting will bring about the development of innovative minimally invasive medical instrument designs that improve procedure efficacy, reduce patient trauma, and reduce medical cost. Microfabrication knowledge gained will lead to new laser-based micro manufacturing and multi-axis electrical discharge machining techniques. These fabrication techniques will enable the future development of microstructured medical devices that have a larger range of sizes, shapes and materials than conventional microfabrication techniques can produce. This collaborative research project between Pennsylvania State University and North Carolina State University will also positively impact engineering education at these universities and enhance cross-disciplinary research collaboration.