Processing venous oxygen saturation and hematocrit information in an implantable sensor
First Claim
1. A method for collecting data from an implantable multi-wavelength venous oxygen (SvO2) sensor having multiple light sources, comprising:
- (a) receiving a first signal in response to a peak of a pulsatile action of a blood vessel;
(b) turning on a light source of the multiple light sources in response to the first signal;
(c) receiving a second signal that indicates the light source is on;
(d) sampling, in response to the second signal, an output of a photodetector to measure the intensity of the light source that is on, such that the sampling occurs during the peak of the pulsatile action; and
(e) repeating steps (b) through (d) until outputs corresponding to each of the multiple light sources have been sampled.
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Accused Products
Abstract
Methods of processing venous oxygen saturation and hematrocrit information in an implantable sensor are provided. In an embodiment a method for collecting data from an implantable multi-wavelength SvO2 sensor having multiple light sources is provided. The method includes receiving a frame signal that indicates a beginning of the light sources being turned on and receiving a light source signal that indicates a light source is on. The output of a photodetector is sampled to measure the intensity of the transmitted light. The process is repeated for each light source to gather intensity measurements that then can be used to generate venous oxygen saturation and hematocrit measurements.
13 Citations
14 Claims
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1. A method for collecting data from an implantable multi-wavelength venous oxygen (SvO2) sensor having multiple light sources, comprising:
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(a) receiving a first signal in response to a peak of a pulsatile action of a blood vessel; (b) turning on a light source of the multiple light sources in response to the first signal; (c) receiving a second signal that indicates the light source is on; (d) sampling, in response to the second signal, an output of a photodetector to measure the intensity of the light source that is on, such that the sampling occurs during the peak of the pulsatile action; and (e) repeating steps (b) through (d) until outputs corresponding to each of the multiple light sources have been sampled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification