Optical sensor for measuring physiological properties
First Claim
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1. A physiological probe configured for securing to a subject'"'"'s digit, comprising:
- a sensor module comprising(a) electronic circuitry which comprises (i) at least one source of electromagnetic radiation, and (ii) a photodetector configured to detect radiation from the at least one source of electromagnetic radiation after it has interacted with the subject'"'"'s tissue, thereby acquiring data relating to at least one physiologic property of the subject, wherein the photodetector is operably connected to a connection cable for delivery of photodetector signals to an external processing unit, and(b) a flexible enclosure providing a cover for the electronic circuitry, wherein the flexible enclosure comprises (i) at least one aperture through which the at least one source of electromagnetic radiation emits radiation for irradiating the subject'"'"'s tissue, (ii) at least one aperture through which the photodetector receives radiation after it has interacted with the subject'"'"'s tissue, and (iii) an aperture through which the connection cable passes; and
a cradle module comprising(a) at least first and second rigid housing members mated to one another via a hinge region to form an approximately semicircular ring which is configured to releasably receive the sensor module, wherein the hinge region is configured to provide, when secured to the subject'"'"'s digit, a range of adjustment in a diameter of the ring while physically constraining an included angle measured between the at least one source of electromagnetic radiation and the photodetector within a predetermined range, wherein the predetermined range of the included angle measured between the source(s) of electromagnetic radiation and the photodetector is between about 60° and
about 30°
.
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Abstract
The invention provides a physiological probe that comfortably attaches to the base of the patient'"'"'s thumb, thereby freeing up their fingers for conventional activities in a hospital, such as reading and eating. The probe, which comprises a separate cradle module and sensor module, secures to the thumb and measures time-dependent signals corresponding to LEDs operating near 660 and 905 nm. The cradle module, which contains elements subject to wear, is preferably provided as a disposable unit.
460 Citations
14 Claims
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1. A physiological probe configured for securing to a subject'"'"'s digit, comprising:
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a sensor module comprising (a) electronic circuitry which comprises (i) at least one source of electromagnetic radiation, and (ii) a photodetector configured to detect radiation from the at least one source of electromagnetic radiation after it has interacted with the subject'"'"'s tissue, thereby acquiring data relating to at least one physiologic property of the subject, wherein the photodetector is operably connected to a connection cable for delivery of photodetector signals to an external processing unit, and (b) a flexible enclosure providing a cover for the electronic circuitry, wherein the flexible enclosure comprises (i) at least one aperture through which the at least one source of electromagnetic radiation emits radiation for irradiating the subject'"'"'s tissue, (ii) at least one aperture through which the photodetector receives radiation after it has interacted with the subject'"'"'s tissue, and (iii) an aperture through which the connection cable passes; and a cradle module comprising (a) at least first and second rigid housing members mated to one another via a hinge region to form an approximately semicircular ring which is configured to releasably receive the sensor module, wherein the hinge region is configured to provide, when secured to the subject'"'"'s digit, a range of adjustment in a diameter of the ring while physically constraining an included angle measured between the at least one source of electromagnetic radiation and the photodetector within a predetermined range, wherein the predetermined range of the included angle measured between the source(s) of electromagnetic radiation and the photodetector is between about 60° and
about 30°
. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification