Theoretical Evaluation of the Acoustic Field in an Ultrasonic Bioreactor

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Ultrasound-assisted bioreactors that provide mechanical conditioning to cells have broad applicability in tissue engineering, but biological experiments with ultrasound are very sensitive to environmental conditions. A mathematical model was developed to complement experimental measurements, as well as to describe ultrasonic fields existing in regions where measurements are impossible, specifically, within microporous tissue engineering scaffolds. The model uniquely combines Biot theory to predict the ultrasonic field in the scaffold with an electromechanical transducer model to couple the mechanical stimulation experienced by cells to the external electrical input. In the specific example examined here, cells immobilized on scaffolds are subjected to different forms of ultrasonic stimulation due to the formation of standing wave fields and vertical high-pressure bands. The model confirms the sensitivity of the supplied acoustic power to the liquid level in sonobioreactors and identifies the input electrical impedance as a method of detecting resonance effects.

Original languageEnglish (US)
Pages (from-to)1766-1778
Number of pages13
JournalUltrasound in Medicine and Biology
Volume41
Issue number6
DOIs
StatePublished - Jun 1 2015

Fingerprint

bioreactors
Bioreactors
Acoustics
Ultrasonics
tissue engineering
ultrasonics
Tissue Engineering
stimulation
acoustics
evaluation
cells
Tissue Scaffolds
liquid levels
Immobilized Cells
conditioning
electrical impedance
Transducers
Electric Impedance
standing waves
complement

Keywords

  • Bio-acoustics
  • Biot theory
  • Finite volume method
  • Mechanotransduction
  • Spectral method
  • Tissue engineering
  • Ultrasound

ASJC Scopus subject areas

  • Biophysics
  • Radiological and Ultrasound Technology
  • Acoustics and Ultrasonics

Cite this

Theoretical Evaluation of the Acoustic Field in an Ultrasonic Bioreactor. / Louw, Tobias M.; Subramanian, Anuradha; Viljoen, Hendrik J.

In: Ultrasound in Medicine and Biology, Vol. 41, No. 6, 01.06.2015, p. 1766-1778.

Research output: Contribution to journalArticle

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