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Related Experiment Video

Updated: Feb 24, 2026

A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
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The Ultrasonic Directional Tidal Breathing Pattern Sensor: Equitable Design Realization Based on Phase Information.

Arijit Sinharay1, Raj Rakshit2, Anwesha Khasnobish3

  • 1TCS Research and Innovation, Kolkata 700156, India. arijit.sinharay@tcs.com.

Sensors (Basel, Switzerland)
|August 12, 2017
PubMed
Summary

A new, portable device accurately measures tidal breathing patterns for pulmonary evaluation. This cost-effective technology offers precise, real-time data, improving accessibility to respiratory healthcare.

Keywords:
3D printed blow pipeAD8302pulmonary assessmenttidal breathingultrasonic phase detection

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Area of Science:

  • Biomedical Engineering
  • Respiratory Medicine
  • Medical Device Design

Background:

  • Spirometry is the standard for diagnosing pulmonary ailments but is often impractical due to cost and complexity.
  • There is a need for accessible, portable, and precise methods for pulmonary function assessment.

Purpose of the Study:

  • To develop a novel, cost-effective, and portable device for real-time acquisition and analysis of directional tidal breathing patterns.
  • To provide an alternative to traditional spirometry for pulmonary evaluation.

Main Methods:

  • Designed a system using an in-house blowpipe, 40-kHz air-coupled ultrasound transceivers, and an RF phase-gain IC.
  • Utilized phase measurement technique for enhanced sensitivity and cost-effectiveness, avoiding sub-microsecond time-of-flight requirements.
  • Calibrated the system with a 3-L syringe and validated against a standard spirometer.

Main Results:

  • The device achieved a maximum percentage error below 16% when validated against a standard spirometer.
  • Extracted tidal breathing parameters demonstrated comparability with existing research.
  • Respiration rate detection error was only 3.9% compared to manual evaluation.

Conclusions:

  • The developed tidal breathing pattern (TBP) prototype shows significant potential for accurate pulmonary parameter measurement.
  • This technology can extend the reach of affordable respiratory healthcare, particularly in rural and underserved areas.