Contoured protrusion for improving spectroscopic measurement of blood constituents
First Claim
1. A multi-stream emitter for a noninvasive, physiological device configured to transmit optical radiation in a tissue site, said emitter comprising:
- a submount comprising a base surface;
a first surface perpendicular to the base surface;
a second surface perpendicular to the first surface and the base surface;
a top-emitting diode affixed on the first surface and configured to transmit first infrared optical radiation in a first direction perpendicular to the first surface and into a tissue site of a patient;
a side-emitting diode affixed on the second surface and configured to transmit second infrared optical radiation in a second direction parallel to the second surface and into the tissue site of the patient, wherein the side-emitting diode is configured to transmit the second infrared optical radiation at a power between 40 mW to 100 mW and at a wavelength between 1600 nm to 1800 nm, and wherein the side-emitting diode is larger than the top-emitting diode;
a heat sink thermodynamically coupled to the top-emitting diode and the side-emitting diode; and
at least one thermistor configured to detect a temperature of at least one of the optical sources,the top-emitting diode and the side-emitting diode positioned on the submount such that the first and the second infrared optical radiation are generally aligned toward the tissue site of the patient.
1 Assignment
0 Petitions
Accused Products
Abstract
A noninvasive physiological sensor for measuring one or more physiological parameters of a medical patient can include a bump interposed between a light source and a photodetector. The bump can be placed in contact with body tissue of a patient and thereby reduce a thickness of the body tissue. As a result, an optical pathlength between the light source and the photodetector can be reduced. In addition, the sensor can include a heat sink that can direct heat away from the light source. Moreover, the sensor can include shielding in the optical path between the light source and the photodetector. The shielding can reduce noise received by the photodetector.
1101 Citations
7 Claims
-
1. A multi-stream emitter for a noninvasive, physiological device configured to transmit optical radiation in a tissue site, said emitter comprising:
-
a submount comprising a base surface; a first surface perpendicular to the base surface; a second surface perpendicular to the first surface and the base surface; a top-emitting diode affixed on the first surface and configured to transmit first infrared optical radiation in a first direction perpendicular to the first surface and into a tissue site of a patient; a side-emitting diode affixed on the second surface and configured to transmit second infrared optical radiation in a second direction parallel to the second surface and into the tissue site of the patient, wherein the side-emitting diode is configured to transmit the second infrared optical radiation at a power between 40 mW to 100 mW and at a wavelength between 1600 nm to 1800 nm, and wherein the side-emitting diode is larger than the top-emitting diode; a heat sink thermodynamically coupled to the top-emitting diode and the side-emitting diode; and at least one thermistor configured to detect a temperature of at least one of the optical sources, the top-emitting diode and the side-emitting diode positioned on the submount such that the first and the second infrared optical radiation are generally aligned toward the tissue site of the patient. - View Dependent Claims (2, 3, 4)
-
-
5. An emitter of a noninvasive optical sensor, the emitter configured to transmit optical radiation into a tissue site to be detected after attenuation by said tissue site, said emitter comprising:
-
a base surface; a first surface extending in a longitudinal direction from the base surface; a second surface extending in the longitudinal direction from the base surface and perpendicular from the first surface; an optical source comprising a top-emitting diode and a side-emitting diode, wherein the top-emitting diode is placed on the first surface and configured to emit first optical radiation in a first direction towards the tissue site and the side-emitting diode is placed on the second surface and configured to emit optical radiation in the first direction towards the tissue site, and wherein the side-emitting diode is larger in size than the top-emitting diode; and a driver configured to; drive the top-emitting diode to transmit light at a first wavelength into the tissue site; and drive the side-emitting diode to transmit light at a second wavelength into the tissue site, wherein the top-emitting diode and the side-emitting diode are positioned such that light transmitted by the top-emitting diode and the side-emitting diode is aligned toward the tissue site. - View Dependent Claims (6, 7)
-
Specification