A passive intraocular pressure sensor and a wireless sensing technique using an intermediate LC resonator

Author

Cao, Haibo ; Weber, Robert J. ; Hamouche, Nicolas G.

Author_Institution

Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA

fYear

2011

fDate

7-8 April 2011

Firstpage

5

Lastpage

8

Abstract

This paper presents a wireless passive pressure sensor and wireless sensing techniques for intraocular pressure (IOP) measurement. The sensor device consists of a capacitor array and a coil inductor, which form a series LC type resonator. The capacitor array is also a membrane structure, and is fabricated by surface micromachining technique. By using a high permeability ferrite coil detector, the IOP sensor can be wirelessly detected up to 4mm with a sensitivity of 3.78kHz/(10mmHg), under a pressure range 0-70mmHg. This work also demonstrates a new sensing technique using an intermediate LC resonator to improve the sensing distance to 1.5cm, with a sensitivity of about 185Hz/(10mmHg).

Keywords

bioMEMS; biomembranes; cellular biophysics; coils; eye; micromachining; permeability; pressure sensors; prosthetics; resonators; capacitor array; coil inductor; high permeability ferrite coil detector; intermediate LC resonator; membrane structure; passive intraocular pressure sensor; pressure 0 mm Hg to 70 mm Hg; surface micromachining technique; wireless passive pressure sensor; wireless sensing technique; Biomembranes; Capacitors; Coils; Couplings; Detectors; Sensitivity; Glaucoma; Intraocular Pressure Sensor; Passive Telemetry; Surface Micromachining;

fLanguage

English

Publisher

ieee

Conference_Titel

Life Science Systems and Applications Workshop (LiSSA), 2011 IEEE/NIH

Conference_Location

Bethesda, MD

Print_ISBN

978-1-4577-0421-5

Type

conf

DOI

10.1109/LISSA.2011.5754141

Filename

5754141