METHODS AND SYSTEMS FOR SHAPING DRIVE PULSES IN A MEDICAL DEVICE
First Claim
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1. A method of compensating for a channel effect in a physiological monitor, the method comprising:
- determining, using processing equipment, a signal characteristic corresponding to a channel effect of a channel used to receive a light signal attenuated by a subject; and
determining, using the processing equipment, at least one light drive parameter, wherein the light drive parameter is based on the signal characteristic, wherein the at least one light drive parameter is configured to compensate for the channel effect, and wherein the at least one light drive parameter comprises light drive shape.
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Abstract
Systems and methods are provided for shaping drive pulses in a medical device. In some embodiments, signal channel characteristics introduce undesirable channel effects including signal distortions such as droop in a square wave pulse. In some embodiments, the system may shape light drive pulses to compensate for channel effects. Light drive characteristics may be determined based on, for example, modeling of components and/or iterative calibration techniques. The output of the channel may be used to determine physiological information such as blood oxygen saturation and respiration rate.
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Citations
22 Claims
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1. A method of compensating for a channel effect in a physiological monitor, the method comprising:
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determining, using processing equipment, a signal characteristic corresponding to a channel effect of a channel used to receive a light signal attenuated by a subject; and determining, using the processing equipment, at least one light drive parameter, wherein the light drive parameter is based on the signal characteristic, wherein the at least one light drive parameter is configured to compensate for the channel effect, and wherein the at least one light drive parameter comprises light drive shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for compensating for a channel effect in a physiological monitor, the system comprising:
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a sensor configured to receive a light signal attenuated by a subject; and processing equipment configured to perform operations comprising; determining a signal characteristic corresponding to a channel effect of a channel used to receive the light signal attenuated by the subject; and determining at least one light drive parameter, wherein the light drive parameter is based on the signal characteristic, wherein the at least one light drive parameter is configured to compensate for the channel effect, and wherein the at least one light drive parameter comprises light drive shape. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification