Method for reducing power consumption in pulse oximeter systems, pulse oximeter system and pulse oximeter sensor
First Claim
1. A method for determining blood characteristics of a subject based on photoplethysmographic data, the method comprising:
- estimating time instants of systolic rises in at least one plethysmographic waveform of a subject;
controlling light emitting elements of a sensor according to the estimated time instants, thereby to collect signal samples from a plurality of plethysmographic waveforms of the subject during the systolic rises; and
defining at least one desired blood parameter based on the signal samples collected during the systolic rises.
1 Assignment
0 Petitions
Accused Products
Abstract
Method and pulse oximeter system for determining blood characteristics of a subject are disclosed. A pulse oximeter sensor for collecting plethysmographic data is also disclosed. In order to reduce the power consumption, time instants of systolic rises are estimated in at least one plethysmographic waveform of a subject and light emitting elements of a sensor are controlled according to the estimated time instants, thereby to collect signal samples from a plurality of plethysmographic waveforms of the subject during the systolic rises. A desired blood parameter, typically oxygen saturation, is then defined based on the signal samples collected during the systolic rises.
-
Citations
20 Claims
-
1. A method for determining blood characteristics of a subject based on photoplethysmographic data, the method comprising:
-
estimating time instants of systolic rises in at least one plethysmographic waveform of a subject; controlling light emitting elements of a sensor according to the estimated time instants, thereby to collect signal samples from a plurality of plethysmographic waveforms of the subject during the systolic rises; and defining at least one desired blood parameter based on the signal samples collected during the systolic rises. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A pulse oximeter system for determining blood characteristics of a subject, the pulse oximeter system comprising:
-
a sensor comprising light emitting elements; a first synchronization unit configured to estimate time instants of systolic rises in at least one plethysmographic waveform of a subject; a second synchronization unit configured to control the light emitting elements according to the estimated time instants, thereby to collect signal samples from a plurality of plethysmographic waveforms of the subject during the systolic rises; and a calculation unit configured to define at least one desired blood parameter based on the signal samples collected during the systolic rises. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A pulse oximeter sensor for collecting plethysmographic data, the pulse oximeter sensor comprising:
-
light emitting elements; and a synchronization unit configured to receive timing information indicative of time instants of systolic rises in plethysmographic waveforms of a subject and to control the light emitting elements according to the time instants, thereby to collect signal samples from the plethysmographic waveforms during the systolic rises. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification