Multi-functional Active Catheter

多功能主动导管

• 批准号: 10359001
• 负责人: ESASHI Masayoshi
• 金额: $ 18.43万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10359001/
• 关键词: Active catheter; Shape memory alloy actuator; Integrated circuit; Ultrasonic endoscope; 1-3 Composite; Piezoelectric ceramic; PZT; Fiber optic pressure sensor

Active catheters which can move in a blood vessel and reach some part in a body(for example inside a brain) have been developed for the purpose of diagnosis and therapy in a blood vessel. Micromachining based on a semiconductor micro fabrication has been applied for their fabrication. Many actuators made of shape memory alloy(SMA) coil rare distributed in the active catheter and hence it can bend flexibly like a snake. Sensors for the catheters have been developed as well.Active catheters(2.3 mm in outer diameter) having integrated circuits for communication and control and hence needs only three common lead wires have been developed. Multi-functional active catheters( 1.4 mm in outer diameter) which can not only bend but also extend and twist have been also developed. The Multi-functional active catheters have been fabricated in batch process using electroplating and other processes. Furthermore active guide wires(0.5 mm in outer diameter) have been fabricated using etched thin SMApla … More te. Thin outer tube having liner coil was fabricated for the active catheter.Sensors for the active catheters have been developed. One is a forward looking ultrasound imager (3 mm in outer diameter)at the end of the active catheter to assist their navigation. Thermal micro relay as a multiplexer for the transmitting ultrasonic pulse has been developed. Micromachining of a piezoelectric material(PZT) has been studied. Silicon lost mold process for the PZT which uses micromachined silicon as a mold for sintering was developed and achieved piezoelectric characteristics successfully.Fiber optic fine(125 μm in outer diameter) pressure sensor which has a thin diaphragm at the end of a optical fiber was fabricated by applying silicon deep reactive ion etching(RIE). Three axis magnetic field sensor was fabricated at the end of en active catheter was fabricated to know the position and the direction of the catheter tip in the body.Laser assisted chemical vapor deposition(CVD) using ultraviolet CW laser was developed for micro assembly and selective metalization. These research results presented in a conference for the therapy inside brain blood vessel were highly evaluated by medical doctors. Less

为了在血管中进行诊断和治疗目的，已经开发了可以在血管中移动并到达体内某个部分（例如大脑内部）的活性导管。基于半导体微制造的微加工已用于制造。许多由形状记忆合金（SMA）线圈制成的执行器稀有分布在活性导管中，因此它可以像蛇一样弯曲。也已经开发了导管的传感器。活性导管（外径2.3毫米）具有用于通信和控制的集成电路，因此仅开发了三条常见的导线。多功能活性导管（外径为1.4毫米）不仅可以弯曲，而且还可以延伸和扭曲。多功能活性导管已在批处理过程中使用电镀和其他过程制造。此外，活跃的导管线（外径为0.5毫米）直径已使用擦除的薄SMAPLA……更多。为活性导管的发电机制造了带有衬里线圈的细管。一个是活跃导管末端的前看超声成像仪（外径为3毫米），以帮助导航。热微继电器作为传输超声脉冲的多路复用器。压电材料（PZT）的微加工已经研究了。 PZT的硅丢失模具过程成功地开发并实现了压电特性。纤维精细（外径为125μm）压力传感器，通过在光纤末端施加了硅纤维末端，通过施加了硅的深层反应式反应离子二子（Rie）。在EN活性导管的末端制造了三个轴磁场传感器，以了解体内导管尖端的位置和方向。使用紫外线CW激光器开发用于微型组装和选择性金属化的激光器辅​​助化学蒸气沉积（CVD）。医生对脑血管内部治疗的会议上提出了这些研究结果。较少的

项目成果

T.Katsumata,Y.Haga,K.Minami and M.Esashi: "Micromachined 125μm Diameter Ultra Miniature Fiber-Optic Pressure Sensor for Catheter"電気学会論文誌E. 120-E-2. 58-63 (2000)

T.Katsumata、Y.Haga、K.Minami 和 M.Esashi：“用于导管的微加工 125μm 直径超微型光纤压力传感器”IEEJ Transactions E. 120-E-2 (2000)。

Y.Haga,M.Esashi and S.Maeda: "Bending, Torsional and Extending Active Catheter Assembled Using Electroplating"Proc.of the Micro Electro Mechanical Systems'2000. 13. 181-186 (2000)

Y.Haga、M.Esashi 和 S.Maeda：“使用电镀组装的弯曲、扭转和延伸主动导管”Proc. of the Micro Electro Mechanical Systems2000。

K.Totsu, Y.Haga and M.Esashi: "Magnetic Vector Sensor System for Detecting Position and Orientation of a Catheter Tip (in Japanese)"Proc.of the 38th Conf.The Japan Soc.of Medical Electronics and Biological Eng.. 39. 29 (2000)

K.Totsu、Y.Haga 和 M.Esashi：“用于检测导管尖端位置和方向的磁矢量传感器系统（日语）”第 38 届日本医疗电子和生物工程会议论文集。

Y.Haga and M.Esashi: "Micromachine Technologies for Intra-Corporal Ultrasonic Imaging (in Japanese)"Advanced Medicine. 5-1. 48-51 (1998)

Y.Haga 和 M.Esashi：“用于体内超声成像的微机械技术（日语）”高级医学。

Y.Haga, M.Esashi and S.Maeda: "Bending, Torsional and Extending Active Catheter Assembled Using Electroplating"Proc.of the MEMS' 2000. 13. 181-186 (2000)

Y.Haga、M.Esashi 和 S.Maeda：“使用电镀组装的弯曲、扭转和延伸有源导管”Proc.of the MEMS 2000. 13. 181-186 (2000)