Multi-stream data collection system for noninvasive measurement of blood constituents
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 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.
1. A noninvasive optical physiological measurement device adapted to be worn by a wearer, the noninvasive optical physiological measurement device providing an indication of a physiological parameter of the wearer comprising:
a plurality of emitters of different wavelengths;
a housing having a surface and a circular wall protruding from the surface;
at least four detectors arranged on the surface and spaced apart from each other, the at least four detectors configured to output one or more signals responsive to light from the one or more light emitters attenuated by body tissue, the one or more signals indicative of a physiological parameter of the wearer; and
a light permeable cover arranged above at least a portion of the housing, the light permeable cover comprising a protrusion arranged to cover the at least four detectors.
2. The noninvasive optical physiological measurement device of claim 1 , wherein the light permeable cover is attached to the housing and forms an airtight or substantially airtight seal enclosing the at least four detectors.
3. The noninvasive optical physiological measurement device of claim 2 , wherein the circular wall creates a gap between the surface and the light permeable cove.
4. The noninvasive optical physiological measurement device of claim 2 , wherein the housing provides noise shielding for the at least four detectors.
5. The noninvasive optical physiological measurement device of claim 4 , wherein the light permeable cover comprises a conductive layer configured to shield the at least four detectors from noise.
6. The noninvasive optical physiological measurement device of claim 3 , wherein the protrusion comprises a continuous protrusion.
7. The noninvasive optical physiological measurement device of claim 6 , wherein the continuous protrusion comprises a convex protrusion.
8. The noninvasive optical physiological measurement device of claim 6 , wherein the light permeable cover is comprised of a rigid material.
9. The noninvasive optical physiological measurement device of claim 8 , wherein the light permeable cover is configured to be positioned between the at least four detectors and tissue of a user when the noninvasive optical physiological measurement device is worn by the user.
10. The noninvasive optical physiological measurement device of claim 9 , wherein the light permeable cover is configured to press against and at least partially deform tissue of the user when the noninvasive optical physiological measurement device is worn by the user.
11. The noninvasive optical physiological measurement device of claim 10 , wherein the light permeable cover is configured to act as a tissue shaper and conform tissue of the user to at least a portion of an external surface shape of the light permeable cover when the noninvasive optical physiological measurement device is worn by the user.
12. The noninvasive optical physiological measurement device of claim 11 , wherein the light permeable cover is configured to reduce a mean path length of light traveling to the at least four detectors.
13. The noninvasive optical physiological measurement device of claim 11 , wherein the at least four detectors are evenly spaced from one another.
14. The noninvasive optical physiological measurement device of claim 1 , wherein the light permeable cover is configured to reduce a mean path length of light traveling to the at least four detectors.
15. The noninvasive optical physiological measurement device of claim 13 , wherein the light permeable cover concentration window is configured to increase a signal to noise ratio of the noninvasive optical physiological measurement device.
16. The noninvasive optical physiological measurement device of claim 13 , wherein the light permeable cover is configured to increase a signal strength per area of the at least four detectors.
17. The noninvasive optical physiological measurement device of claim 1 , wherein the physiological parameter is pulse rate.
18. The noninvasive optical physiological measurement device of claim 1 , wherein the physiological parameter is at least one of: glucose, oxygen, oxygen saturation, methemoglobin, total hemoglobin, carboxyhemoglobin, or carbon monoxide.
19. The noninvasive optical physiological measurement device of claim 1 , wherein the noninvasive optical physiological measurement device is a disposable or a reusable device.
20. The noninvasive optical physiological measurement device of claim 1 , wherein a first detector is arranged spaced apart from a second detector, and a third detector arranged spaced apart from a fourth detector.
21. The noninvasive optical physiological measurement device of claim 20 , wherein the first detector is arranged across a central axis from the second detector and the third detector is arranged across the central axis from the fourth detector, wherein the first, second, third and fourth detectors form a cross pattern about the central axis.
22. The noninvasive optical physiological measurement device of claim 20 , wherein the noninvasive optical physiological measurement device provides a variation in optical path length to the at least four detectors.
23. The noninvasive optical physiological measurement device of claim 1 , wherein the noninvasive optical physiological measurement device is comprised as part of a mobile monitoring device.
24. The noninvasive optical physiological measurement device of claim 23 , wherein the mobile monitoring device includes a touch-screen display.
25. A physiological monitoring system comprising:
the noninvasive optical physiological measurement device of claim 1 ; and
a processor configured to receive the one or more signals and communicate physiological measurement information to a mobile phone.
26. A noninvasive optical physiological measurement device adapted to be worn by a wearer providing an indication of a physiological parameter of the wearer comprising:
a plurality of emitters of different wavelengths;
a circular housing comprising a surface with a raised edge;
at least four detectors arranged on the surface, wherein a first detector is arranged spaced apart from a second detector, and a third detector arranged spaced apart from a fourth detector; and
a cover of the circular housing comprising a lens portion, the lens portion comprising a protrusion in optical communication with the at least four detectors,
wherein the at least four detectors are configured to output one or more signals responsive to light from the one or more light emitters attenuated by body tissue, the one or more signals indicative of a physiological parameter of the wearer.
27. The noninvasive optical physiological measurement device of claim 26 , wherein the first detector is arranged across a central axis from the second detector and the third detector is arranged across the central axis from the fourth detector, wherein the first, second, third and fourth detectors form a cross pattern about the central axis.
28. The noninvasive optical physiological measurement device of claim 26 , wherein the at least four detectors are arranged in a grid pattern such that the first detector and the second detector are arranged across from each other on opposite sides of a central point along a first axis, and the third detector and the fourth detector are arranged across from each other on opposite sides of the central point along a second axis which is perpendicular to the first axis.
29. The noninvasive optical physiological measurement device of claim 27 , wherein the physiological parameter is pulse rate.
30. The noninvasive optical physiological measurement device of claim 27 , wherein the physiological parameter is at least one of: glucose, oxygen, oxygen saturation, methemoglobin, total hemoglobin, carboxyhemoglobin, or carbon monoxide.