ANALYTE MONITORING USING ONE OR MORE ACCELEROMETERS

• US 20110087083A1
• Filed: 09/16/2010
• Published: 04/14/2011
• Est. Priority Date: 09/17/2009
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Bruinsma, Johannes, Lamego, Marcelo, Poeze, Jeroen
• Granted Patent: US 9,510,779 B2
• Time in Patent Office: Days
• US Class Current: 600/316
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/6838 Clamps or clips

Abstract

The present disclosure relates to methods, devices, and systems for measuring a blood analyte, such as glucose. The disclosure relates more specifically to the use in such methods, devices, and systems of one or more accelerometers to aid in the collection of data, operation of the device, filtering, and other uses. In some embodiments, the accelerometers are three-dimensional accelerometers. An accelerometer can be used in conjunction with analyte monitoring that may be performed with infrared, near infrared, or other wavelength spectroscopy. The accelerometer may allow a monitoring instrument to expect noisy measurement data, indicate positioning of a measurement site for improved expected results, indicate position of the instrument, or help the user properly place or control the instrument. It may also improve analyte monitoring by providing motion information that can be used to help determine and reduce or remove movement-related signal artifacts or noise that may be present within the monitoring signal.

Claims

1. A physiological monitoring system comprising:

a sensor, comprising;

a light source; and

a photodetector capable of detecting light from said light source after attenuation by tissue of a measurement site; and

a device coupled to the sensor, comprising;

one or more accelerometers; and

a signal processor which receives a signal generated by the one or more accelerometers, said signal processor capable of;

generating a movement signal based on the signal generated by ‘

the one or more accelerometers; and

providing feedback to a user based on the movement signal for the device.

2. The physiological monitoring system of claim 1, wherein the feedback provided to the user comprises turning on a user interface on the device.

3. The physiological monitoring system of claim 1, wherein the feedback provided to the user comprises reorienting a user interface on the device.

4. The physiological monitoring system of claim 1, wherein the feedback provided to the user comprises showing the user a new menu on an interface on the device.

5. The physiological monitoring system of claim 1, wherein the physiological monitoring system further includes a user interface and the signal processor is further capable of providing data to the user interface.

6. The physiological monitoring system of claim 1, wherein the signal processor is further configured to improve signal integrity based on the outputs of the one or more accelerometers.

7. The physiological monitoring system of claim 6, wherein the signal processor signal processor improves signal integrity by adaptive filtering based on the outputs of the one or more accelerometers.

8. The physiological monitoring system of claim 6, wherein the signal processor improves signal integrity by signaling the user based on the outputs of the one or more accelerometers.

12. The physiological monitoring system of claim 5, wherein the feedback provided to the user comprises showing the user a noise level of a signal obtained based on data from the accelerometer on a user interface on the device.

13. The physiological monitoring system of claim 5, wherein the physiological monitoring system further includes a user interface and the signal processor is further capable of providing data to the user interface.

9. A physiological monitoring system comprising:

a sensor, comprising;

an accelerometer;

a light source; and

a photodetector capable of detecting light from said light source after attenuation by tissue of a measurement site; and

a device coupled to the sensor, comprising;

a signal processor which receives a signal generated by the accelerometer, said signal processor capable of;

generating a movement signal based on the signal generated by the accelerometer; and

providing feedback to a user based on the movement signal for the device.

10. The physiological monitoring system of claim 9, wherein the accelerometer;

and wherein the signal processor is further capable of;

using the signal produced by the accelerometer to estimate a position of the sensor; and

indicating to an end user a desired position of the sensor relative to the estimated position of the sensor.

11. The physiological monitoring system of claim 9, wherein the signal processor is further capable of:

using the signal produced by the accelerometer to determine the orientation of the sensor; and

indicating to an end user a desired orientation of the sensor relative to the current orientation of the sensor.

14. A physiological monitoring system comprising:

a sensor, comprising;

one or more accelerometers;

a light source; and

a photodetector capable of detecting light from said light source after attenuation by tissue of a measurement site; and

a device coupled to the sensor, comprising

a signal processor which receives signal generated by the one or more accelerometers and an analyte signal detected by the device, said signal processor capable of;

generating a movement noise signal based on the signal generated by the one or more accelerometers; and

generating a noise-reduced signal based on the movement noise signal and the analyte signal.

15. The physiological monitoring system of claim 14, wherein the physiological monitoring system further includes a user interface and the signal processor is further capable of providing data to the user interface.

16. The physiological monitoring system of claim 14, wherein the signal processor is further configured to improve signal integrity based on the outputs of the one or more accelerometers.

17. The physiological monitoring system of claim 16, wherein the signal processor improves signal integrity by adaptive filtering based on the outs of the one or more accelerometers.

18. The physiological monitoring system of claim 16, wherein the signal processor signal processor improves signal integrity by signaling the user based on the outs of the one or more accelerometers.