Investigation of long term drift of an intraocular pressure sensor
| Autor: | Phuong Truong, Frank E. Talke, Christoph Schade, Aditya Vasan, Alex Phan, James Friend |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Communications Technologies Intraocular pressure Materials science Fabrication Membrane thickness 02 engineering and technology Zero drift Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Term (time) Membrane Hardware and Architecture Deflection (engineering) 0103 physical sciences Nanotechnology Mechanical Engineering & Transports Nanoscience & Nanotechnology Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Microsystem Technologies, vol 27, iss 6 MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS, vol 27, iss 6 |
| ISSN: | 1432-1858 0946-7076 |
| DOI: | 10.1007/s00542-020-05164-2 |
| Popis: | “Zero drift” behavior of an optical intraocular pressure sensor is studied using an analytical model based on the deflection of a circular membrane. Results from the analytical model were verified with experimental results from “bulge” testing. The analytical model was used to study the zero drift of the sensor as a function of changes in membrane thickness, geometry of the sensor and amount of gas inside the cavity of the sensor. The results show that dissolution of the membrane, swelling of the spacer layer and oxidative aging can contribute significantly to zero drift of the sensor over time. The results are useful in guiding design and fabrication optimization to minimize drift in intraocular pressure sensors used for long term implantation. |
| Databáze: | OpenAIRE |
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