Microstructure-based fiber optic pressure sensor for measurements in lumbar intervertebral discs

Svante Hoejer; Martin Krantz; Lars Ekstroem; Allison Kaigle; Sten Holm

doi:10.1117/12.336921

15 January 1999 Microstructure-based fiber optic pressure sensor for measurements in lumbar intervertebral discs

Svante Hoejer, Martin Krantz, Lars Ekstroem, Allison Kaigle, Sten Holm

Proceedings Volume 3570, Biomedical Sensors, Fibers, and Optical Delivery Systems; (1999) https://doi.org/10.1117/12.336921
Event: BiOS Europe '98, 1998, Stockholm, Sweden

Abstract

A fiberoptic system with a microstructure sensor element was used for measuring lumbar intervertebral disc pressure in a porcine model. The fiberoptic pressure sensor was inserted in the disc using a guiding needle. A reference sensor was also introduced into the same area of an adjacent disc. The fiberoptic sensor detected pressures from 0.7-8 bar in the disc. Dynamic measurements were carried out at frequencies between 2 and 10 Hz. No phase lag was observed between the applied force and the measured pressures. Sensitivity, dynamic response and available pressure range are all important design characteristics for which this fiberoptic sensor has a competitive edge.

Citation Download Citation

Svante Hoejer, Martin Krantz, Lars Ekstroem, Allison Kaigle, and Sten Holm "Microstructure-based fiber optic pressure sensor for measurements in lumbar intervertebral discs", Proc. SPIE 3570, Biomedical Sensors, Fibers, and Optical Delivery Systems, (15 January 1999); https://doi.org/10.1117/12.336921

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