Reflectance and/or transmissive pulse oximeter
First Claim
Patent Images
1. A system comprising:
- a sensor comprising;
a sensor body adapted to be applied to a patient'"'"'s tissue;
a first detector and a second detector disposed on the sensor body;
an emitter disposed on the sensor body, wherein the emitter and the first detector are configured to operate in transmission mode and the emitter and the second detector are configured to operate in reflectance mode, and wherein the sensor is configured to alternate between transmission mode and reflectance mode such that the first detector is active when the second detector is inactive and such that the second detector is active when the first detector is inactive; and
a monitor comprising a processor configured to;
receive a signal from the sensor;
determine a signal quality of the signal, wherein determining the signal quality comprises detecting a signal artifact in the signal and determining a characteristic of the signal artifact, and wherein determining the characteristic of the signal artifact comprises determining if the signal artifact comprises one or more of an η
-artifact, α
-artifact, Δ
Ptiss-artifact, heterogeneity artifact, or boundary condition artifact; and
control the activation of the first detector and the second detector based on the signal quality and the characteristic of the signal artifact.
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Abstract
According to various embodiments, a medical sensor assembly may be configured to switch between transmission and reflectance mode. Such sensors may include multiple optical sensing components that may be activated or silent, depending on the mode in use. A practitioner may switch between modes based on the particular situation of the patient or based on the signal quality.
49 Citations
15 Claims
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1. A system comprising:
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a sensor comprising; a sensor body adapted to be applied to a patient'"'"'s tissue; a first detector and a second detector disposed on the sensor body; an emitter disposed on the sensor body, wherein the emitter and the first detector are configured to operate in transmission mode and the emitter and the second detector are configured to operate in reflectance mode, and wherein the sensor is configured to alternate between transmission mode and reflectance mode such that the first detector is active when the second detector is inactive and such that the second detector is active when the first detector is inactive; and a monitor comprising a processor configured to; receive a signal from the sensor; determine a signal quality of the signal, wherein determining the signal quality comprises detecting a signal artifact in the signal and determining a characteristic of the signal artifact, and wherein determining the characteristic of the signal artifact comprises determining if the signal artifact comprises one or more of an η
-artifact, α
-artifact, Δ
Ptiss-artifact, heterogeneity artifact, or boundary condition artifact; andcontrol the activation of the first detector and the second detector based on the signal quality and the characteristic of the signal artifact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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receiving a signal from a first detector disposed on a sensor body; determining a quality of the signal, wherein determining the quality of the signal comprises determining if the signal comprises a signal artifact and determining a characteristic of the signal artifact; and switching between a transmission mode and a reflectance mode based at least in part upon the characteristic of the signal artifact and a determination that the quality of the signal is below a certain threshold, wherein switching from the transmission mode to the reflectance mode comprises switching from the first detector to a second detector disposed on the sensor body. - View Dependent Claims (13, 14, 15)
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Specification