Evaluating the dynamic performance of a fibre optic pressure microsensor

Shigao Chen, Cristina Pislaru, Randall R. Kinnick, Duane A. Morrow, Kenton R. Kaufman, James F. Greenleaf

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The dynamic performance of a new fibre optic sensor intended for measuring physiological fluid pressures is assessed in water. The sensor's sensitivity is evaluated at 23°, 35° and 37°C against a Millar pressure catheter for sinusoidal pressure inputs with frequency ranging from 0.5 to 10 Hz. We found that sensitivity versus frequency is flat to 6 Hz and decreases slightly between 6 and 10 Hz. The sensitivity is slightly lower at 23°C than at 37°C. The reproducibility of measurements is excellent (two separate calibration tests in two consecutive days). The output of the fibre optic system used shows a constant time delay (0.13 s) for all frequencies tested. Experiments suggest that, with current sensor design, its immersion in degassed water prior to use ensures a reliable performance.

Original languageEnglish (US)
Pages (from-to)N13-N19
JournalPhysiological Measurement
Volume26
Issue number4
DOIs
StatePublished - Aug 1 2005

Keywords

  • Fibre optic sensor
  • Fluid pressure
  • Measuring instruments

ASJC Scopus subject areas

  • Biophysics
  • Physiology
  • Biomedical Engineering
  • Physiology (medical)

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