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Biomimetic pulsatile flows through flexible microfluidic conduits.

Kiran Raj M1, Sunando DasGupta, Suman Chakraborty

  • 1Advanced Technology Development Center, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.

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|March 15, 2019
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Summary
This summary is machine-generated.

Pulsatile blood flow in microfluidic channels was studied using a blood analog. Pressure waveforms significantly impact hydrodynamics, offering insights for lab-on-a-chip microcirculation assessments.

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Microfluidics

Background:

  • Microfluidic devices are crucial for simulating physiological conditions.
  • Understanding pulsatile blood flow dynamics is essential for diagnosing cardiovascular diseases.
  • Biomimetic microchannels replicate in vivo environments for accurate research.

Purpose of the Study:

  • To investigate the pulsatile flow of a blood analog fluid in a biomimetic microfluidic channel.
  • To analyze the effects of pressure waveforms on microchannel hydrodynamics.
  • To assess the implications for lab-on-a-chip platforms in microcirculation studies.

Main Methods:

  • Utilized a blood analog fluid (Xanthan gum solution) in polydimethylsiloxane microchannels.
  • Applied physiologically relevant pressure waveforms, mimicking in vivo features like peak amplitude and dicrotic notch.
  • Analyzed time-varying velocity profiles and deformation profiles to understand viscoelastic behavior.

Main Results:

  • Viscoelastic behavior was observed in deformation profiles towards the end of each pressure cycle.
  • Local hydrodynamics were found to be more influenced by pressure waveforms than wall deformation or velocity profiles.
  • In vitro reproduction of in vivo waveform features was achieved.

Conclusions:

  • Pressure waveform characteristics are critical determinants of microchannel hydrodynamics.
  • Results provide valuable insights for developing advanced lab-on-a-chip platforms for microcirculation research.
  • The study enhances the understanding of pulsatile flow in physiologically relevant microfluidic systems.