The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China.
School of Mechatronics and Automobile Engineering, Yantai University, Yan Tai 264005, China.
Sensors (Basel). 2020 Apr 8;20(7):2087. doi: 10.3390/s20072087.
The real-time monitoring of the working status of drainage tubes is crucial for successful surgical drainage and for informing clinicians of the drainage conditions of patients at different stages, to enable objective diagnosis and treatment. In this study, a method for monitoring the drainage condition of drainage tubes was proposed. The method was based on the principle of capacitance and was developed by analyzing the major states of drainage tubes in the process of drainage. Meanwhile, the principle of interdigital capacitance monitoring drainage was analyzed, and an interdigital capacitance device for the real-time monitoring of the working status of drainage tubes was designed. Ultimately, an experimental system for drainage simulation was established on the basis of the interdigital capacitance device and method for drainage monitoring. Results showed that the interdigital capacitance device for drainage monitoring can identify unobstructed or blocked drainage tubes effectively in real time. The device has a hydrophobic surface, so its electrodes do not undergo electrolysis and pollution due to adhesion. Hence the proposed capacitance-based method for monitoring the working states of drainage tubes has good application prospects in the postoperative drainage of abdominal and thoracic cavities.
实时监测引流管的工作状态对于手术引流的成功以及向临床医生告知患者在不同阶段的引流情况至关重要，以便进行客观的诊断和治疗。本研究提出了一种监测引流管引流情况的方法。该方法基于电容原理，通过分析引流管在引流过程中的主要状态进行开发。同时，分析了叉指电容监测引流的原理，并设计了用于实时监测引流管工作状态的叉指电容装置。最终，在叉指电容引流监测装置和方法的基础上，建立了引流模拟实验系统。结果表明，引流监测叉指电容装置能够实时有效地识别通畅或堵塞的引流管。该装置具有疏水表面，因此其电极不会因粘连而发生电解和污染。因此，基于电容的监测引流管工作状态的方法在胸腹腔术后引流中具有良好的应用前景。
