Internal micro pump system by ultrasonic wave

动脉硬化、血栓等循环系统疾病的治疗具有重要的临床意义，为此，提出了一种基于微处理器控制的微执行器的微观机制。然而，将这些机制应用于活组织可能是困难的，因为这些机制有许多问题需要解决。例如，对活组织的安全性和可靠性还不清楚。本研究在助学金的支持下，提出并研究了基于超声波和微粒的微观机理。例如，当微粒子悬浮在超声波驻波中，通过改变超声波的相位使驻波横向移动时，微粒子沿相同的横向运动。这可能会成为活组织中的微型刮刀。如果微粒被超声波驻波捕获，阻力输送系统也可以以相同的方式设计。为了设计包括微泵、微刮板和微颗粒捕集系统在内的微机构，利用模拟容器进行了基本实验，并给出了这些方法的特点。

It is clinically important to give medical treatment for circulatory diseases such as arterial sclerosis and thrombosis.For this purpose, micro mechanisms which are based on micro actuator controlled by micro CPU have been proposed. However, it may be difficult to apply these mechanisms in living tissues, because there are many problems to be solved in these mechanisms. For example, safety to the living tissues and reliability are not clear. In our research which is supported by the grant-in-aid, micro mechanisms which are based on the use of ultrasonic waves and micro particles are proposed and are studied. For example, when the micro particles are suspended in the ultrasonic standing waves and the standing waves shift laterally by shanging the phase of an ultrasonic wave, the micro particles move in the same lateral direction. This may become a micro scraper in the living tissues. The drag delivery system may be also designed in the same manner if the micro particles are trapped by the ultrasonic standing wave. In order to design such micro mechanisms including micro pump, micro scraper and micro particle trapping system, the basic experiments are carried out by using mimic vessels and characteristics of theses methods are presented.