Methods and systems for power optimization in a medical device
First Claim
1. A pulse oximetry monitoring system, comprising:
- an oximetry sensor comprising a light source; and
a pulse oximeter comprising a processor, wherein the pulse oximeter is coupled to the oximetry sensor and is configured to;
receive an external trigger, wherein the external trigger is based on a signal other than a light signal received from the oximetry sensor;
vary at least one parameter of a light drive signal modulation based on the external trigger; and
generate a light drive signal for activating the light source to emit a photonic signal according to the light drive signal modulation.
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Abstract
A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger.
57 Citations
32 Claims
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1. A pulse oximetry monitoring system, comprising:
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an oximetry sensor comprising a light source; and a pulse oximeter comprising a processor, wherein the pulse oximeter is coupled to the oximetry sensor and is configured to; receive an external trigger, wherein the external trigger is based on a signal other than a light signal received from the oximetry sensor; vary at least one parameter of a light drive signal modulation based on the external trigger; and generate a light drive signal for activating the light source to emit a photonic signal according to the light drive signal modulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification