摘要
设计了一种基于温差原理的足背动脉血液流量传感器,传感器由前端柔性加热片和后端信号调理板组成。搭建了模拟足背实验平台,在模拟足背动脉流量范围(4~20mL/min)内,传感器能稳定监测到与流量相关的温差信号(0.10~0.24℃),并通过持续测量验证了对流量的分辨率高于4mL/min。最后,建立了温差信号与流量信号的定量映射关系。进一步开展了人体足背实验,对两名志愿者足背进行了测试。血流通畅条件下,温差信号在1.03~2.14℃间,在局部临时阻断条件下,温差信号表现约为0.5℃的波动,验证传感器对监测足背动脉的可行性。该传感器在指导下肢动脉缺血血运重建手术、患者术后居家监测等方面具有重要意义。
A flow sensor for the dorsalis pedis artery based on the temperature difference principle is designed.The sensor comprises a front-end flexible heating module and a back-end signal conditioning board.A simulated dorsalis pedis experimental platform is built to stably monitor the temperature difference signal(at 0.10~0.24℃)corresponding with flow within the range of the simulated dorsalis pedis artery flow from 4 to 20 mL/min.It is verified by continuously measurement that the flow rate resolution exceeds 4 ml/min.Finally,a quantitative mapping relationship between the temperature difference signal and flow signal is established.Additional trials are conducted on the human foot instep,where two volunteers are selected for testing.The temperature difference signal ranges of 1.03~2.14℃under blood patency conditions.The signal shows a fluctuation of approximately 0.5℃during local temporary blocking conditions.These results confirm the feasibility of the sensor in monitoring the dorsalis pedis artery.This sensor is of great significance in guiding revascularization surgery for lower limb arterial ischemia and in monitoring patients post-surgery at home.
作者
范士远
林学广
谭晋韵
邓宇君
彭林法
FAN Shiyuan;LIN Xueguang;TAN Jinyun;DENG Yujun;PENG Linfa(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Department of Vascular Surgery,Pudong Hospital of Fudan University,Shanghai 201399,China;Department of Vascular Surgery,Huashan Hospital of Fudan University,Shanghai 200040,China)
出处
《传感器与微系统》
北大核心
2025年第8期12-16,共5页
Transducer and Microsystem Technologies
基金
国家自然科学基金青年科学基金资助项目(52005331)
上海市卫生健康委员会科研项目(202150004)。
关键词
温差式流量传感
足背动脉
肤表器件
differential temperature flow sensing
dorsalis pedis artery
skin surface device
