3D printed micro-scale fiber optic probe for intravascular pressure sensing
| Autor: | Charles A. Mosse, Malcolm Finlay, Adrien E. Desjardins, Jo Coote, Ioannis Papakonstantinou, Radhika K. Poduval |
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| Rok vydání: | 2018 |
| Předmět: |
Optical fiber
Fabrication Materials science business.industry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Pressure sensor Thermal expansion law.invention 010309 optics Interferometry Pressure measurement Deflection (engineering) law Fiber optic sensor 0103 physical sciences Optoelectronics 0210 nano-technology business |
| Zdroj: | Biosensing and Nanomedicine XI. |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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