title: Smart Sensing Strip Using Monolithically Integrated Flexible Flow Sensor for Noninvasively Monitoring Respiratory Flow.
abstract: This paper presents a smart sensing strip for noninvasively monitoring respiratory flow in real time. The monitoring system comprises a monolithically-integrated flexible hot-film flow sensor adhered on a molded flexible silicone case, where a miniaturized conditioning circuit with a Bluetooth4.0 LE module are packaged, and a personal mobile device that wirelessly acquires respiratory data transmitted from the flow sensor, executes extraction of vital signs, and performs medical diagnosis. The system serves as a wearable device to monitor comprehensive respiratory flow while avoiding use of uncomfortable nasal cannula. The respiratory sensor is a flexible flow sensor monolithically integrating four elements of a Wheatstone bridge on single chip, including a hot-film resistor, a temperature-compensating resistor, and two balancing resistors. The monitor takes merits of small size, light weight, easy operation, and low power consumption. Experiments were conducted to verify the feasibility and effectiveness of monitoring and diagnosing respiratory diseases using the proposed system.
authors.affiliation: State Key Laboratory of Precision Measurement Technology and Instrument, Department of Precision Instrument, Tsinghua University, Beijing 100084, China. jiang-p13@mails.tsinghua.edu.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Precision Measurement Technology and Instrument, Department of Precision Instrument, Tsinghua University, Beijing 100084, China. zolmes2010@163.com.
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Precision Measurement Technology and Instrument, Department of Precision Instrument, Tsinghua University, Beijing 100084, China. zr_gloria@mail.tsinghua.edu.cn.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhu
mesh_terms: D004867:Equipment Design; D045853:Exhalation / Q000502:physiology*; D006801:Humans; D008046:Lip / Q000502:physiology; D008954:Models, Biological; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D009666:Nose / Q000502:physiology; D012815:Signal Processing, Computer-Assisted; D017216:Telemedicine / Q000295:instrumentation*
keywords: flexible hot-film flow sensor; micro sensor; respiratory disease; wearable device; wireless monitoring