Jung Wooseok, Li Chunyan, Kim Dong-Sik, Ahn Chong H
Microsystems and BioMEMS Laboratory, Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, OH, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:4469-72. doi: 10.1109/IEMBS.2009.5333823.
An innovative sensing tube with an integrated piezoelectric flow sensor to measure flow rate in portal vein during liver transplantation has been developed and characterized in this work. This smart tube aims to measure flow rates in the portal vein in a real-time continuous format with high reliability. The PVDF-TrFE piezoelectric flow sensor integrated in a tube was able to measure flow rates with the sensitivity of 0.02 mVpp per 20 mL/min in the range of portal vein flow rate. It also showed excellent operational stability for 120 minutes with a standard deviation of 0.084 mVpp. The tube can be used as a clinical tool for assessing the need for portal vein inflow modification during liver transplantation.
在这项工作中，已经开发并表征了一种创新的传感管，其集成了压电流量传感器，用于在肝移植期间测量门静脉流速。这种智能管旨在以高可靠性实时连续地测量门静脉流速。集成在管中的聚偏氟乙烯-三氟乙烯（PVDF-TrFE）压电流量传感器能够在门静脉流速范围内以每20 mL/min 0.02 mVpp的灵敏度测量流速。它还在120分钟内表现出出色的操作稳定性，标准偏差为0.084 mVpp。该管可作为一种临床工具，用于评估肝移植期间门静脉流入量改变的必要性。
