磁控微型螺旋机器人可高速穿越血管，实现精准治疗。
Magnetic Milli-spinner for Robotic Endovascular Surgery
- 采用螺旋鳍与缝隙结构，磁驱动实现高效推进。
- 最高速度达23 cm/s，是迄今最快的无缆磁控机器人。
- 适合脑血管等复杂狭窄环境的微创手术，前景广阔。
血管疾病如血栓、动脉粥样硬化和动脉瘤可导致血流阻塞或血管破裂，常见且危及生命。传统微创治疗依赖导管引导小型器械或药物至靶区，但导管在狭窄弯曲的血管（如脑血管）中导航困难且不可靠。磁驱动的无缆机器人作为替代方案，在复杂血管系统导航和治疗中展现出潜力。然而，现有机器人大多难以对抗高速血流或对特定病灶处理不足。本文提出一种多功能磁控微型螺旋机器人，具有独特中空结构，包含螺旋鳍和缝隙，旋转时产生特殊流场。该机器人在管状环境中运动速度达23厘米/秒，为迄今最快无缆磁控机器人，展现出在血流环境中高效导航和执行多种治疗任务的潜力，适用于多种血管疾病的机器人治疗。
原文摘要 · Abstract (English)
Vascular diseases such as thrombosis, atherosclerosis, and aneurysm, which can lead to blockage of blood flow or blood vessel rupture, are common and life-threatening. Conventional minimally invasive treatments utilize catheters, or long tubes, to guide small devices or therapeutic agents to targeted regions for intervention. Unfortunately, catheters suffer from difficult and unreliable navigation in narrow, winding vessels such as those found in the brain. Magnetically actuated untethered robots, which have been extensively explored as an alternative, are promising for navigation in complex vasculatures and vascular disease treatments. Most current robots, however, cannot swim against high flows or are inadequate in treating certain conditions. Here, we introduce a multifunctional and magnetically actuated milli-spinner robot for rapid navigation and performance of various treatments in complicated vasculatures. The milli-spinner, with a unique hollow structure including helical fins and slits for propulsion, generates a distinct flow field upon spinning. The milli-spinner is the fastest-ever untethered magnetic robot for movement in tubular environments, easily achieving speeds of 23 cm/s, demonstrating promise as an untethered medical device for effective navigation in blood vessels and robotic treatment of numerous vascular diseases.
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