1
|
Drazan JF, Abdoun OT, Wassick MT, Dahle R, Beardslee L, Marcus GA, Cady NC, Ledet EH. Simple implantable wireless sensor platform to measure pressure and force. Med Eng Phys 2018; 59:81-87. [PMID: 30064939 DOI: 10.1016/j.medengphy.2018.06.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 04/24/2018] [Accepted: 06/29/2018] [Indexed: 11/18/2022]
Abstract
Smart implants have the potential to enable personalized care regimens for patients. However, the integration of smart implants into daily clinical practice is limited by the size and cost of available sensing technology. Passive resonant sensors are an attractive alternative to traditional sensing technologies because they obviate the need for on-sensor signal conditioning or telemetry and are substantially simpler, smaller, less expensive, and more robust than other sensing methods. We have developed a novel simple, passive sensing platform that is adaptable to a variety of applications. Sensors consist of only two disconnected parallel Archimedean spiral coils and an intervening solid dielectric layer. When exposed to force or pressure, the resonant frequency of the circuit shifts which can be measured wirelessly. We fabricated prototype pressure sensors and force sensors and compared their performance to a lumped parameter model which predicts sensor behavior. The sensors exhibited a linear response (R2 > 0.91) to dynamic changes in pressure or force with excellent sensitivity. Experimental data were within 13.3% and 6.2% of the values predicted by the model for force and pressure respectively. Results demonstrate that the sensors can be adapted to measure various measurands through a span of sensitivities and ranges by appropriate selection of the intervening layer.
Collapse
Affiliation(s)
- John F Drazan
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, JEC 7044, Troy, NY, USA
| | - Omar T Abdoun
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, JEC 7044, Troy, NY, USA
| | - Michael T Wassick
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, JEC 7044, Troy, NY, USA
| | - Reena Dahle
- Department of Electrical Engineering, State University of New York at New Paltz, 1 Hawk Drive, New Paltz, NY, USA
| | - Luke Beardslee
- Department of Nanobioscience, State University of New York Polytechnic Institute, 257 Fuller Road, Albany, NY, USA
| | - George A Marcus
- Department of Physics, State University of New York at Geneseo, 1 College Circle, Geneseo, NY, USA
| | - Nathaniel C Cady
- Department of Nanobioscience, State University of New York Polytechnic Institute, 257 Fuller Road, Albany, NY, USA
| | - Eric H Ledet
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 8th Street, JEC 7044, Troy, NY, USA; Research and Development Service, Stratton VA Medical Center, 113 Holland Avenue, Albany, NY, USA.
| |
Collapse
|