Methods and systems for power optimization in a medical device
First Claim
1. A method of operating a pulse oximeter, the method comprising:
- receiving, using the pulse oximeter, a photoplethysmograph (PPG) signal from a pulse oximetry sensor, which comprises a light source and a detector;
determining, using the pulse oximeter, pulse period information related to physiological pulses in the PPG signal;
determining, using the pulse oximeter, at least one parameter of a light drive signal based on the pulse period information, wherein the at least one parameter is determined to vary substantially synchronously with the physiological pulses, and wherein the determined at least one parameter comprises at least one of light intensity, light source firing rate, and duty cycle; and
generating, using the pulse oximeter, the light drive signal for activating the light source of the pulse oximetry sensor to emit a photonic signal according to the determined at least one parameter.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
21 Claims
-
1. A method of operating a pulse oximeter, the method comprising:
-
receiving, using the pulse oximeter, a photoplethysmograph (PPG) signal from a pulse oximetry sensor, which comprises a light source and a detector; determining, using the pulse oximeter, pulse period information related to physiological pulses in the PPG signal; determining, using the pulse oximeter, at least one parameter of a light drive signal based on the pulse period information, wherein the at least one parameter is determined to vary substantially synchronously with the physiological pulses, and wherein the determined at least one parameter comprises at least one of light intensity, light source firing rate, and duty cycle; and generating, using the pulse oximeter, the light drive signal for activating the light source of the pulse oximetry sensor to emit a photonic signal according to the determined at least one parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
Specification