Design and analysis of a magnetic connection device for external ventricular drain

IF 1.4 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Rongguo Yan, Junjun Ye, Jiahui Wang, Maomao Wang
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引用次数: 1

Abstract

It is difficult to separate Luer lock adapters during the external ventricular drainage (EVD) since they are often connected by a threaded connection, and the infusion needle put into the patient's body gets pulled out when extubation occurs unexpectedly. The paper described a new magnetic connection assembly made up of ring magnetic permanents and a Hall sensor that could be used to replace Luer lock adapters for quicker disconnection and reconnection of the drainage catheter. For the design and analysis of the device, the finite element method magnetics (FEMM) was used to estimate the size of magnetic permanents and the best detection site of the Hall sensor for detecting whether the magnetic permanents were closely attracted and/or pulled apart. Then an experiment was conducted to confirm our findings. Both simulation and experiment revealed that a pair of hollow cylindrical magnetic permanents, each with height 10 mm, outer diameter 8 mm, and inner diameter 4 mm, could achieve the same force as the Luer lock adapters held, and that the best Hall sensor detection position was in the middle of the permanent magnets, with a radial distance of about 2 mm.

Abstract Image

心室外引流磁连接装置的设计与分析
在心室外引流(EVD)过程中,很难分离Luer锁适配器,因为它们通常通过螺纹连接,并且当意外拔管时,插入患者体内的输液针会被拔出。本文介绍了一种由环形永磁体和霍尔传感器组成的新型磁性连接组件,该组件可用于取代路厄锁定适配器,以更快地断开和重新连接引流导管。为了设计和分析该装置,使用有限元法磁学(FEMM)来估计永磁体的尺寸和霍尔传感器的最佳检测位置,以检测永磁体是否被紧密吸引和/或拉开。然后进行了一项实验来证实我们的发现。模拟和实验都表明,一对高度为10mm、外径为8mm、内径为4mm的空心圆柱形永磁体可以获得与鲁尔锁适配器相同的力,霍尔传感器的最佳检测位置位于永磁体的中间,径向距离约为2mm。
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来源期刊
Iet Science Measurement & Technology
Iet Science Measurement & Technology 工程技术-工程:电子与电气
CiteScore
4.30
自引率
7.10%
发文量
41
审稿时长
7.5 months
期刊介绍: IET Science, Measurement & Technology publishes papers in science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.The emphasis of the journal is on theory, simulation methodologies and measurement techniques. The major themes of the journal are: - electromagnetism including electromagnetic theory, computational electromagnetics and EMC - properties and applications of dielectric, magnetic, magneto-optic, piezoelectric materials down to the nanometre scale - measurement and instrumentation including sensors, actuators, medical instrumentation, fundamentals of measurement including measurement standards, uncertainty, dissemination and calibration Applications are welcome for illustrative purposes but the novelty and originality should focus on the proposed new methods.
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