Abstract
A fiber optic sensing system for pressure measurement in invasive urodynamics is presented and experimentally validated. Probes are based on extrinsic Fabry-Perot interferometry (EFPI) principle, with an all-glass biocompatible design having 0.2-mm thickness. Pressure sensitivity of 1.0-1.6 nm/kPa with high stability and reduced thermal sensitivity has been achieved, leading to 0.3-cmH2O pressure accuracy. The EFPI probes have been embedded in medical catheters with 4F size for dual bladder and abdominal pressure measurement throughout the full course of a urodynamic analysis. Pressure traces have been compared with a PICO2000 urodynamic instrument, showing improved accuracy and higher responsivity to local pressure variations. Tests have been carried out in vivo on seven patients; the main highlights are reported, showing the premises for an EFPI-based diagnostic tool.
Original language | English |
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Article number | 6762873 |
Pages (from-to) | 2335-2340 |
Number of pages | 6 |
Journal | IEEE Sensors Journal |
Volume | 14 |
Issue number | 7 |
DOIs | |
Publication status | Published - Jul 2014 |
Externally published | Yes |
Keywords
- Biophotonics
- extrinsic Fabry-Perot interferometry (EFPI)
- medical optics instrumentation
- optical fiber sensing
- urology
ASJC Scopus subject areas
- Instrumentation
- Electrical and Electronic Engineering