Laser micromachining system for the development of sensorized medical devices

用于开发传感医疗设备的激光微加工系统

• 批准号: 406033-2011
• 负责人: Naish, Michael
• 金额: $ 7.84万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=472369
• 关键词: Laser; micromachining; system; development; sensorized

This proposal is requesting funds to purchase a 193-nm excimer laser micromachining system for the fabrication of small-scale sensors to be incorporated into a variety of instruments suitable for minimally invasive surgery and therapy (MIST). In MIST, instruments enter the patient's body through small (10 mm) incisions. This type of surgery significantly reduces trauma to the body, post-operative pain and the length of hospital stay compared to open surgery. Many of the ongoing projects at CSTAR (Canadian Surgical Technologies and Advanced Robotics) are focused on the development of new devices and techniques for this type of surgery. Projects include the development of instruments for tumour localization, single port access surgery (where instruments are often less than 3 mm in diameter), active catheters, the delivery of probe and needle based ablative therapies (e.g., brachytherapy and radio-frequency ablation), and a test-bed for haptics-enabled, robotics-assisted MIST. In each of these projects, the size and capabilities of currently available sensors impose limits on the design and functionality of devices intended for use in MIST. For example, to overcome the loss of haptic cues due to friction, moments and force scaling at the entry point, it is desirable to place force-sensing elements at or near the tip of MIST instruments; however, even the smallest strain gauges are often too large and are too difficult to apply accurately. The requested laser micromachining centre would allow strain-sensitive elements to be fabricated in-place by precisely ablating insulating and semiconductor layers deposited on instrument tips, shafts and flexure elements. The resulting micro strain gauges would be smaller than commercially-available gauges, free from adhesion and alignment issues, and could be made into any desired pattern. The versatility of the excimer laser system allows for high precision cutting, etching, drilling and ablation of a wide variety of materials including metals, polymers, ceramics and glasses. This capability is essential to the development of sensor technologies suitable for use in MIST instrumentation.

该提案要求提供资金，用于购买193纳米准分子激光微加工系统，用于制造小型传感器，这些传感器将被纳入各种适用于微创手术和治疗（MIST）的仪器。在MIST中，器械通过小切口（10 mm）进入患者体内。与开放性手术相比，这种类型的手术显著减少了对身体的创伤，术后疼痛和住院时间。CSTAR（加拿大外科技术和先进机器人）正在进行的许多项目都专注于开发这种手术的新设备和技术。项目包括开发肿瘤定位仪器、单孔手术（仪器直径通常小于3 mm）、有源导管、探针和针消融治疗（例如，近距离放射治疗和射频消融），以及用于触觉使能的机器人辅助MIST的试验台。在这些项目中，当前可用传感器的尺寸和功能对预期用于MIST的设备的设计和功能施加了限制。例如，为了克服由于进入点处的摩擦、力矩和力缩放而导致的触觉提示的损失，期望将力感测元件放置在MIST仪器的尖端处或附近;然而，即使是最小的应变仪也常常太大并且太难以准确地应用。所要求的激光微加工中心将允许通过精确烧蚀沉积在仪器尖端、轴和弯曲元件上的绝缘层和半导体层来就地制造应变敏感元件。所得到的微应变仪将小于市售的应变仪，没有粘附和对准问题，并且可以制成任何期望的图案。准分子激光系统的多功能性允许对各种材料进行高精度切割、蚀刻、钻孔和烧蚀，包括金属、聚合物、陶瓷和玻璃。这种能力对于开发适用于MIST仪器的传感器技术至关重要。