Direct to digital oximeter
First Claim
Patent Images
1. An oximeter for non-invasively measuring arterial oxygen saturation, comprising:
- a sensor including at least first and second light emitting devices for producing light in at least two wavelengths;
at least one photodetector for detecting said light, after passing through a tissue sample containing a pulsating blood supply, and for producing an analog electrical current signal representing the absorption of each wavelength of said light;
an analog to digital converter for converting said analog electrical current signal to a digital voltage signal; and
a processing unit for processing said digital voltage signal to calculate an arterial oxygen saturation.
3 Assignments
0 Petitions
Accused Products
Abstract
An oximeter for non-invasively measuring the oxygen saturation in blood with increased speed and accuracy. The device includes a sensor unit which can be attached to a patient and an oximeter which determines the oxygen saturation in the blood based on signals received from the sensor. In the present invention, the detected signal is immediately converted to a digital value.
283 Citations
15 Claims
-
1. An oximeter for non-invasively measuring arterial oxygen saturation, comprising:
-
a sensor including at least first and second light emitting devices for producing light in at least two wavelengths; at least one photodetector for detecting said light, after passing through a tissue sample containing a pulsating blood supply, and for producing an analog electrical current signal representing the absorption of each wavelength of said light; an analog to digital converter for converting said analog electrical current signal to a digital voltage signal; and a processing unit for processing said digital voltage signal to calculate an arterial oxygen saturation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for non-invasively measuring arterial oxygen saturation, comprising the steps of:
-
producing light of at least first and second wavelengths; directing said light at a tissue sample containing a pulsating blood supply; detecting said light, after passing through said tissue sample, and producing an analog electrical current signal representing the absorption rate of each wavelength of said light; then converting said analog electrical current signal to a digital voltage signal; then processing the digital voltage signal to calculate an arterial oxygen saturation. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
Specification