基于磁驱动技术的空肠营养管的设计

目的:为解决目前床旁鼻肠管快速置入成功率低这一临床难题,该文提出一种基于磁驱动技术的空肠营养管的设计。方法:分析了现有空肠营养管置管过程中的动力因素,结合磁驱动技术原理,提出了通过体外旋转磁场带动体内感应磁体螺旋式前进的设计方案,以期缩短空肠营养管的飘管时间。结果:该设计包括磁性空肠营养管和体外磁力驱动装置两部分。其中磁性空肠营养管由管体和感应磁头两部分构成,感应磁头包括磁体内核和硅胶外壳。磁力驱动装置由多极磁体和手持式微型电机组成。操作时通过体外磁力驱动装置发出大旋转磁场带动空肠营养管的感应磁头做轴向旋转运动,可加速空肠营养管在肠道内的移动,达到缩短飘管时间的目的。结论:该设计基于磁驱动技术原理,设计巧妙,符合磁力学原理,操作简单,具有临床应用潜力。

The Design of Jejunum Nutrition Tube Based on Magnetic Drive Technology

ABSTRACT Objective: To solve the problem of low success rate of placing nasointestinal tube rapidly at the bed, this paper proposes a design of nasointestinal tube based on magnetic drive technology. Methods: The dynamic factors in the process of placing the nasointestinal tube were analyzed, and the design scheme of driving the induction magnet in the body forward by rotating the magnetic field outside the body was proposed, in order to shorten the floating time of the nasointestinal tube. Results: The design consists of two parts: magnetic nasointestinal tube and external magnetic drive device. The magnetic nasointestinal tube is composed of a tube body and an induction head, which includes a magnet core and a silicone shell. The magnetic driving device is composed of multi-pole magnets and hand-held micro-motor. During operation, a large rotating magnetic field is generated by the external magnetic drive device to drive the induction head of the nasointestinal tube to do axial rotation, which can accelerate the movement of the nasointestinal tube in the intestinal tract and shorten the floating tube time. Conclusion: The design is based on the principle of magnetic drive technology, which is ingenious, in accordance with the principle of magnetism, simple to operate and has the potential of clinical application.