Characterization of local fluid flow in 3D porous construct characterized by fourier domain doppler optical coherence tomography

P. O. Bagnaninchi, Y. Yang, A. El Haf, M. T. Hinds, R. K. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In order to achieve functional tissue with the correct biomechanical properties it is critical to stimulate mechanically the cells. Perfusion bioreactor induces fluid shear stress that has been well characterized for two-dimensional culture where both simulation and experimental data are available. However these results can't be directly translated to tissue engineering that makes use of complex three-dimensional porous scaffold. Moreover, stimulated cells produce extensive extra-cellular matrix (ECM) that alter dramatically the micro-architecture of the constructs, changing the local flow dynamic. In this study a Fourier domain Doppler optical coherent tomography (FD-DOCT) system working at 1300nm with a bandwidth of 50nm has been used to determine the local flow rate inside different types of porous scaffolds used in tissue engineering. Local flow rates can then be linearly related, for Newtonian fluid, to the fluid shear stress occurring on the pores wall. Porous chitosan scaffolds (φ1.5mm × 3mm) with and without a central 250 um microchannel have been produced by a freeze-drying technique. This techniques allow us to determine the actual shear stress applied to the cells and to optimise the input flow rate consequently, but also to relate the change of the flow distribution to the amount of ECM production allowing the monitoring of tissue formation.

Original languageEnglish (US)
Title of host publicationOptics in Tissue Engineering and Regenerative Medicine
DOIs
StatePublished - Aug 31 2007
EventOptics in Tissue Engineering and Regenerative Medicine - San Jose, CA, United States
Duration: Jan 21 2007Jan 23 2007

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume6439
ISSN (Print)1605-7422

Other

OtherOptics in Tissue Engineering and Regenerative Medicine
CountryUnited States
CitySan Jose, CA
Period1/21/071/23/07

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Keywords

  • 3D porous constructs
  • Fourier domain Doppler OCT
  • Interconnectivity
  • Local fluid flow
  • Porous scaffold
  • Shear stress
  • Tissue engineering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

Cite this

Bagnaninchi, P. O., Yang, Y., El Haf, A., Hinds, M. T., & Wang, R. K. (2007). Characterization of local fluid flow in 3D porous construct characterized by fourier domain doppler optical coherence tomography. In Optics in Tissue Engineering and Regenerative Medicine [64390H] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 6439). https://doi.org/10.1117/12.701083