Multi-stream data collection system for noninvasive measurement of blood constituents

Patent metadata

Field	Value
Publication number	US-11426103-B2
Application number	US-201916449143-A
Country	US
Kind code	B2
Filing date	Jun 21, 2019
Priority date	Jul 3, 2008
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

The present disclosure relates to noninvasive methods, devices, and systems for measuring various blood constituents or analytes, such as glucose. In an embodiment, a light source comprises LEDs and super-luminescent LEDs. The light source emits light at at least wavelengths of about 1610 nm, about 1640 nm, and about 1665 nm. In an embodiment, the detector comprises a plurality of photodetectors arranged in a special geometry comprising one of a substantially linear substantially equal spaced geometry, a substantially linear substantially non-equal spaced geometry, and a substantially grid geometry.

First claim

What is claimed is:

1. A noninvasive physiological sensor comprising:
at least two sets of photodiodes; and
a front-end interface comprising:
one or more inputs configured to receive signals from the respective sets of photodiodes in the sensor;
respective switched capacitor circuits for each respective set of photodiodes and configured to convert the signals from the respective sets of photodiodes into output signals for each of the respective sets of photodiodes, wherein the switched capacitor circuits include at least two switched capacitor circuits, and wherein the at least two switched capacitor circuits are configured to combine the output signals of two or more of the at least two sets of photodiodes into a single stream; and
an output configured to provide the output signals, wherein the switched capacitor circuits are configured to provide analog averaging of the output signals.

2. The noninvasive physiological sensor of claim 1 , wherein the front-end interface is integrated with the sensor.

Assignees

• Masimo Corp

Inventors

• Poeze Jeroen
• Lamego Marcelo
• Merritt Sean
• Dalvi Cristiano
• Vo Hung
• Bruinsma Johannes
• Lesmana Ferdyan
• Kiani Massi Joe E

Classifications

• A61B2562/0233

  Special features of optical sensors or probes classified in A61B5/00 · CPC title

• A61B2562/046

  in a matrix array · CPC title

• A61B5/6826

  Finger · CPC title

• A61B5/02427

  Details of sensor · CPC title

• A61B5/14546

  for measuring analytes not otherwise provided for, e.g. ions, cytochromes · CPC title