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 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 sensor comprising:
a plurality of emitters configured to emit light into tissue of a user;
at least four detectors, wherein at least one of the at least four detectors is configured to detect light that has been attenuated by tissue of the user, and wherein the at least four detectors are arranged on a substrate;
a wall configured to circumscribe at least the at least four detectors; and
a cover configured to be located between tissue of the user and the at least four detectors when the noninvasive optical physiological sensor is worn by the user, wherein the cover comprises a single protruding convex surface operable to conform tissue of the user to at least a portion of the single protruding convex surface when the noninvasive optical physiological sensor is worn by the user, and wherein the wall operably connects to the substrate and the cover.
2. The noninvasive optical physiological sensor of claim 1 , wherein the wall operably connects to the substrate on one side and operably connects to the cover on an opposite side.
3. The noninvasive optical physiological sensor of claim 1 wherein the at least four detectors are arranged evenly spaced from one another.
4. The noninvasive optical physiological sensor of claim 3 further comprising:
an opaque layer blocking light other than at one or more openings that allow light to pass through to at least one of the at least four detectors.
5. The noninvasive optical physiological sensor of claim 1 , wherein at least part of the cover is light permeable.
6. The noninvasive optical physiological sensor of claim 5 , wherein the cover is configured to allow light to reach at least one of the at least four detectors.
7. A physiological monitoring device comprising:
the noninvasive optical physiological sensor of claim 1 ;
a touch-screen display;
one or more processors configured to receive data or one or more signals from at least one of the at least four detectors and cause communication of physiological measurement information to at least one of: the touch-screen display or a mobile phone; and
a strap configured to facilitate attachment of at least part of the physiological monitoring device to an arm of a user of the physiological monitoring device.
8. The physiological monitoring device of claim 7 further comprising:
a magnet configured to be used as a connecting mechanism.
9. The noninvasive optical physiological sensor of claim 1 , wherein the attenuated light is reflected by the tissue.
10. An optical physiological measurement sensor comprising:
a plurality of emitters configured to emit light into tissue of a user;
a substrate including a planar surface;
at least four detectors operably arranged on the planar surface of the substrate in a pattern;
a cover comprising a single protruding convex surface; and
a wall that surrounds the at least four detectors, wherein the wall operably connects to the substrate and the cover.
11. The optical physiological measurement sensor of claim 10 , wherein the cover is operable to conform tissue of the user to at least a portion of the single protruding convex surface when the optical physiological measurement sensor is worn by the user.
12. The optical physiological measurement sensor of claim 10 , wherein at least a portion of the cover is sufficiently rigid to be operable to conform tissue of the user to at least a portion of a shape of the cover.
13. The optical physiological measurement sensor of claim 10 , wherein the cover is configured to be positioned between the at least four detectors and tissue of a user when the optical physiological measurement sensor is worn by the user.
14. The optical physiological measurement sensor of claim 10 , wherein the wall comprises an opaque surface.
15. The optical physiological measurement sensor of claim 10 , wherein the wall operably connects to the substrate on one side and operably connects to the cover on the other side.
16. The optical physiological measurement sensor of claim 10 , wherein at least a portion of the cover is light permeable.
17. The optical physiological measurement sensor of claim 16 , wherein the cover is configured to allow light to reach at least one of the at least four detectors.
18. The optical physiological measurement sensor of claim 10 further comprising:
one or more openings that allow light to pass through to the at least four detectors.
19. The optical physiological measurement sensor of claim 18 further comprising:
one or more processors configured to:
receive one or more signals from at least one of the at least four detectors, the one or more signals indicative of a physiological parameter of the user of the optical physiological measurement sensor; and
cause output of information indicative of measurements of the physiological parameter to at least one of: a touch-screen display or a mobile phone.
20. A noninvasive optical physiological measurement device comprising:
a plurality of emitters configured to emit light into tissue of a user;
at least four detectors, wherein at least one of the at least four detectors is configured to detect light that has been attenuated by tissue of the user;
a cover configured to be located between tissue of the user and the at least four detectors when the noninvasive optical physiological measurement device is worn by the user, wherein the cover comprises a protruding surface operable to conform tissue of the user to at least a portion of the protruding surface when the noninvasive optical physiological measurement device is worn by the user, and wherein at least one of the at least four detectors is configured to receive light passed through the protruding surface after attenuation by tissue of the user;
a wall surrounding the at least four detectors; and
a substrate on which at least the at least four detectors are positioned,
wherein the wall operably connects to the substrate and the cover, thereby positioning the at least four detectors within one or more spaces formed by at least the substrate, the wall, and the cover.
21. The noninvasive optical physiological measurement device of claim 20 , wherein the cover is further configured to allow passage of light to at least one of the at least four detectors after attenuation by tissue of the user via at least one or more light permeable portions of the cover.
22. The noninvasive optical physiological measurement device of claim 21 , wherein at least a portion of the cover is comprised of a sufficiently rigid material so as to cause the tissue of the user to conform to at least the portion of the protruding surface.
23. The noninvasive optical physiological measurement device of claim 22 , wherein the at least four detectors are evenly spaced from one another.
24. The noninvasive optical physiological measurement device of claim 23 further comprising:
one or more openings that allow light to pass through to the at least four detectors.
25. The noninvasive optical physiological measurement device of claim 24 further comprising:
a magnet configured to be used as a connecting mechanism.
26. The noninvasive optical physiological measurement device of claim 25 further comprising:
one or more processors configured to:
receive data or one or more signals from at least one of the at least four detectors, the data or one or more signals indicative of a physiological parameter of the user of the noninvasive optical physiological measurement device; and
cause output of information indicative of measurements of the physiological parameter to at least one of: a touch-screen display or a mobile phone.
27. The noninvasive optical physiological measurement device of claim 26 , further comprising a touch-screen display.
28. The noninvasive optical physiological measurement device of claim 27 , wherein the physiological parameter comprises at least one of: pulse rate, glucose, oxygen, oxygen saturation, methemoglobin, total hemoglobin, carboxyhemoglobin, or carbon monoxide.
29. The noninvasive optical physiological measurement device of claim 20 , wherein the attenuated light is reflected by the tissue.