MULTI-STREAM DATA COLLECTION SYSTEM FOR NONINVASIVE MEASUREMENT OF BLOOD CONSTITUENTS
First Claim
1. A noninvasive sensor capable of producing a signal responsive to light attenuated by tissue at a measurement site on a patient, the sensor comprising:
- an optical source configured to emit optical radiation onto said tissue at said measurement site;
at least one photodetector configured to detect the optical radiation from said optical source after attenuation by said tissue of said patient and output at least one respective signal stream responsive to said detected optical radiation;
a housing positioning said optical source and said at least one photodetector with respect to said measurement site;
a thermistor operably associated with said housing and configured to output a temperature signal responsive to a temperature of said measurement site.
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Accused Products
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 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.
140 Citations
22 Claims
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1. A noninvasive sensor capable of producing a signal responsive to light attenuated by tissue at a measurement site on a patient, the sensor comprising:
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an optical source configured to emit optical radiation onto said tissue at said measurement site; at least one photodetector configured to detect the optical radiation from said optical source after attenuation by said tissue of said patient and output at least one respective signal stream responsive to said detected optical radiation; a housing positioning said optical source and said at least one photodetector with respect to said measurement site; a thermistor operably associated with said housing and configured to output a temperature signal responsive to a temperature of said measurement site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13)
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10. A method of measuring an analyte and a temperature at a measurement site of a living patient, said method comprising:
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electronically emitting optical radiation on the measurement site; electronically detecting said optical radiation after attenuation by tissue at the measurement site; electronically measuring the temperature of said measurement site; using a signal processor, electronically correcting wavelength drift from said optical source after attenuation by tissue of said measurement site; and electronically determining an output measurement value indicative of the analyte based on the detected streams of optical radiation.
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14. A signal processing system capable of producing a signal responsive to light attenuated by tissue at a measurement site on a patient, the system comprising:
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a noninvasive optical sensor including; an optical source configured to emit optical radiation onto said tissue at said measurement site; at least one photodetector configured to detect the optical radiation from said optical source after attenuation by said tissue of said patient and output at least one respective signal stream responsive to said detected optical radiation; a thermistor operably associated with said housing and configured to output a temperature signal responsive to a temperature of said measurement site. a monitor capable of processing the at least one signal stream and the temperature sensor to determine output values for one or more physiological parameters; and a cable connected to the monitor providing communication between said optical sensor and said monitor. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification