WAVELENGTH SWITCHING FOR PULSE OXIMETRY
First Claim
1. A sensor, comprising:
- a first emitter configured to emit a first wavelength;
a second emitter configured to emit a second wavelength;
a third emitter configured to emit a third wavelength; and
a sensor cable configured to couple to an interface of a patient monitor, wherein the sensor cable is configured to receive light drive signals from the patient monitor;
wherein the sensor is configured to use the light drive signals received from the patient monitor to selectively activate at least two of the first emitter, the second emitter, or the third emitter.
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Accused Products
Abstract
The present disclosure describes techniques that may provide more accurate estimates of arterial oxygen saturation using pulse oximetry by switching between a wavelength spectrum of at least a first and a second light source so that the arterial oxygen saturation estimates at low (e.g., in the range below 75%), medium (e.g., greater than or equal to 75% and less than or equal to 84%), and high (e.g., greater than 84% range) arterial oxygen saturation values are more accurately calculated. In one embodiment, light emitted from a near 660 nm and a near 900 nm emitter pair may be used when the arterial oxygen saturation range is high. In another embodiment, light emitted from a near 730 nm and a near 900 nm emitter pair may be used when the arterial oxygen saturation range is low. In yet another embodiment, light emitted from both a near 660 nm-900 nm emitter pair and light emitted from a near 730 nm-900 nm emitter pair may be used when the arterial oxygen saturation range is in the middle range. Priming techniques may also be used to reduce or eliminate start up delays of certain oximetry system components.
7 Citations
20 Claims
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1. A sensor, comprising:
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a first emitter configured to emit a first wavelength; a second emitter configured to emit a second wavelength; a third emitter configured to emit a third wavelength; and a sensor cable configured to couple to an interface of a patient monitor, wherein the sensor cable is configured to receive light drive signals from the patient monitor; wherein the sensor is configured to use the light drive signals received from the patient monitor to selectively activate at least two of the first emitter, the second emitter, or the third emitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system, comprising:
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a sensor comprising; a first emitter pair configured to emit a first wavelength and a second wavelength; a second emitter pair configured to emit the second wavelength and a third wavelength; and a sensor cable operatively coupled to the first emitter pair and the second emitter pair; and a patient monitor comprising; an interface configured to couple to the sensor cable; and drive circuitry configured to generate light drive signals; wherein the sensor cable is configured to receive the light drive signals from the patient monitor, and wherein the sensor is configured to use the light drive signals received from the patient monitor to selectively activate at least one of the first emitter pair or the second emitter pair. - View Dependent Claims (11, 12, 13, 14)
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15. A method of manufacturing a sensor, comprising:
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providing a first emitter pair configured to emit a first wavelength and a second wavelength; providing a second emitter pair configured to emit the second wavelength and a third wavelength; and coupling a sensor cable to the first emitter pair and the second emitter pair, wherein the sensor cable is configured to couple to an interface of a patient monitor and to receive light drive signals from the patient monitor; and wherein the sensor is configured to use the light drive signals received from the patient monitor to selectively activate at least one of the first emitter pair or the second emitter pair. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification