Multi-stream emitter for noninvasive measurement of blood constituents

US8515509B2 · kind B2 · utility

Assignee

• Cercacor Laboratories, Inc. · US

Inventors

• Johannes Bruinsma · Opeinde, NL
• Marcelo Lamego · Cupertino, US
• Sean Merritt · Lake Forest, US
• Cristiano Dalvi · Irvine, US
• Hung Vo · Garden Grove, US
• Jeroen Poeze · Mission Viejo, US
• Ferdyan Lesmana · Irvine, US
• Massi Joe E. Kiani · Laguna Niguel, US

Key dates

• Filing date: Aug 3, 2009
• Grant date: Aug 20, 2013
• Expiry date: Oct 4, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2562/146
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present disclosure relates to an emitter that is suitable for a noninvasive blood constituent sensor. The emitter is configured as a point optical source that comprises a plurality of LEDs that emit a sequence of pulses of optical radiation across a spectrum of wavelengths. In some embodiments, the plurality of sets of optical sources may each comprise at least one top-emitting LED and at least one super luminescent LED. In some embodiments, the emitter comprises optical sources that transmit optical radiation in the infrared or near-infrared wavelengths suitable for detecting glucose. In order to achieve the desired SNR for detecting analytes like glucose, the emitter may be driven using a progression from low power to higher power. In addition, the emitter may have its duty cycle modified to achieve a desired SNR.