Pressure sensor configurations for implantable medical electrical leads

US7591185B1 · kind B1 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• Kamal Deep Mothilal · Maple Grove, US
• Michael A. Schugt · Windom, US
• David A. Ruben · Mesa, US
• Jonathan P. Roberts · Coon Rapids, US
• Clark B. Norgaard · Phoenix, US
• Lary R. Larson · Apache Junction, US

Key dates

• Filing date: Apr 23, 2008
• Grant date: Sep 22, 2009
• Expiry date: Apr 23, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/0573
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An implantable pressure sensor, which may be incorporated within an implantable medical electrical lead, includes an insulative sidewall, which contains a gap capacitor and an integrated circuit. The insulative sidewall of the pressure sensor includes a pressure sensitive diaphragm portion, and the gap capacitor includes a first electrode plate, which is attached to an interior surface of the diaphragm portion of the sidewall, and a second electrode plate, which is spaced apart from the first electrode plate and coupled to the integrated circuit, which is coupled, through the sidewall, to a supply contact and a ground contact. A conductive layer extends over one of the interior surface of the diaphragm portion of the sidewall and an exterior surface of the diaphragm portion; and the conductive layer is coupled to the ground contact to either shield or ground the first electrode plate.