TY  - JOUR
SN  - 0277-786X
UR  - https://doi.org/10.1117/12.2321980
ID  - discovery10063559
N2  - Small form-factor invasive pressure sensors are widely used in minimally invasive surgery, for example to guide decision making in coronary stenting procedures. Current fiber-optic sensors can have high manufacturing complexities and costs, which severely constrains their adoption outside of niche fields. A particular challenge is the ability to rapidly prototype and iterate upon sensor designs to optimize performance for different applications and medical devices. Here, we present a new sensor fabrication method, which involves two-photon polymerization printing and integration of the printed structure onto the end-face of a single-mode optical fiber. The active elements of the sensor were a pressure-sensitive diaphragm and an intermediate temperature-sensitive spacer that was insensitive to changes in external pressure. Deflection of the diaphragm and thermal expansion the spacer relative to the fiber end-face were monitored using phase-resolved low coherence interferometry. A pressure sensitivity of 0.031 rad/mmHg across the range of 760 to 1060 mmHg (absolute pressure), and a temperature sensitivity of 1.2 mrad/°C across the range 20 to 45°C were observed. This method will enable the fabrication of a wide range of fiber-optic sensors with pressure and temperature sensitivities suitable for guiding minimally invasive surgery.
A1  - Poduval, R
A1  - Coote, J
A1  - Mosse, C
A1  - Finlay, M
A1  - Papakonstantinou, I
A1  - Desjardins, A
JF  - Proceedings of Biosensing and Nanomedicine XI
AV  - public
Y1  - 2018/09/05/
VL  - 10728
TI  - 3D printed micro-scale fiber optic probe for intravascular pressure sensing
N1  - This version is the version of the record. For information on re-use, please refer to the publisher?s terms and conditions.
ER  -