Implantable wireless sensor

US9265428B2 · kind B2 · utility

Assignee

• ST. JUDE MEDICAL LUXEMBOURG HOLDINGS II S.A.R.L. (“SJM LUX II”) · LU

Inventors

• David O'Brien · Atlanta, US
• Jason White · Decatur, US
• Michael Fonseca · Marietta, US
• Jason Kroh · Villa Rica, US
• Mark Allen · Atlanta, US
• David Stern · Grayson, US

Key dates

• Filing date: Jul 18, 2008
• Grant date: Feb 23, 2016
• Expiry date: Aug 31, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49073
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A wireless sensor for indicating a physical state within an environment includes a housing defining a hermetically sealed cavity. A structure located within the cavity of the housing has elements providing capacitance, the elements being arranged such that the distance and thereby the capacitance of the structure changes when a physical state of the environment changes. The structure has a resonant frequency based at least in part on the capacitance of the structure when in the presence of a fluctuating electromagnetic field. When the sensor is positioned within an environment and is subjected to a fluctuating electromagnetic field, the resonant frequency indicates the physical state of the environment.