Biomedical Microdevices

, Volume 15, Issue 1, pp 73–81

An implantable optical blood pressure sensor based on pulse transit time

  • Jens Fiala
  • Philipp Bingger
  • Dominic Ruh
  • Katharina Foerster
  • Claudia Heilmann
  • Friedhelm Beyersdorf
  • Hans Zappe
  • Andreas Seifert
Article

DOI: 10.1007/s10544-012-9689-9

Cite this article as:
Fiala, J., Bingger, P., Ruh, D. et al. Biomed Microdevices (2013) 15: 73. doi:10.1007/s10544-012-9689-9
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Abstract

An implantable sensor system for long-term monitoring of blood pressure is realized by taking advantage of the correlation between pulse transit time and blood pressure. The highly integrated implantable sensor module, fabricated using MEMS technologies, uses 8 light emitting diodes (LEDs) and a photodetector on chip level. The sensor is applied to large blood vessels, such as the carotid or femoral arteries, and allows extravascular measurement of highly-resolved photoplethysmograms. In addition, spectrophotometric approaches allow measurement of hemoglobin derivatives. For the calibration of blood pressure measurements, the sensor system has been successfully implemented in animal models.

Keywords

Optical sensors Photoplethysmography Blood pressure Implantable sensors Pulse transit time Long-term monitoring 

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Jens Fiala
    • 1
  • Philipp Bingger
    • 1
  • Dominic Ruh
    • 1
  • Katharina Foerster
    • 2
  • Claudia Heilmann
    • 2
  • Friedhelm Beyersdorf
    • 2
  • Hans Zappe
    • 1
  • Andreas Seifert
    • 1
  1. 1.Department of Microsystems Engineering (IMTEK), Laboratory for Micro-OpticsUniversity of FreiburgFreiburgGermany
  2. 2.Department of Cardiovascular SurgeryUniversity Medical CenterFreiburgGermany

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