Motion compatible sensor for non-invasive optical blood analysis
First Claim
Patent Images
1. A pulse oximeter sensor comprising:
- a light emitter;
a light detector;
processing circuitry in the sensor that calculates blood oxygen saturation values using signals received from the light detector; and
a transmitter in the sensor for wirelessly transmitting signals from the sensor to an oximeter monitor, wherein the pulse oximeter sensor is attached to a second transmissive pulse oximeter sensor, the second pulse oximeter sensor comprising a second light emitter and a second light detector.
0 Assignments
0 Petitions
Accused Products
Abstract
A non-invasive optical sensor which uses the motion signal to calculate the physiological characteristic being measured. For pulse oximetry, a least squares or a ratio-of-ratios technique can be applied to the motion signal itself. This is made possible by selecting a site on the patient where variations in motion produce signals of two wavelengths which are sufficiently correlated. In particular, it has been determined that a sensor placed on a nail, in particular a thumbnail, exhibits the characteristics of having the red and infrared signals correlated when used for pulse oximetry, and the resulting signals correlate to arterial oxygen saturation.
90 Citations
18 Claims
-
1. A pulse oximeter sensor comprising:
-
a light emitter; a light detector; processing circuitry in the sensor that calculates blood oxygen saturation values using signals received from the light detector; and a transmitter in the sensor for wirelessly transmitting signals from the sensor to an oximeter monitor, wherein the pulse oximeter sensor is attached to a second transmissive pulse oximeter sensor, the second pulse oximeter sensor comprising a second light emitter and a second light detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A pulse oximeter sensor comprising:
-
a light emitter; a light detector; processing circuitry in the sensor that calculates blood oxygen saturation values and a pulse rate using signals received from the light detector; a display in the sensor for displaying the blood oxygen saturation values and the pulse rate; and a transmitter in the sensor for wirelessly transmitting signals from the sensor to an oximeter monitor, wherein the pulse oximeter sensor is attached to a second transmissive pulse oximeter sensor, the second pulse oximeter sensor comprising a second light emitter and a second light detector. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
Specification