Systems, devices, and methods for performing trans-abdominal fetal oximetry and/or trans-abdominal fetal pulse oximetry using a fetal heartbeat signal for a pregnant mammal
AssigneeRaydiant Oximetry, Inc.
InventorNeil Padharia Ray
Life of this patent
Estimating the term…
Abstract
Light reflected from a pregnant woman's abdomen and fetus contained therein that has been received by a detector and converted into a reflected electronic signal may be received by a processor. A portion of the reflected electronic signal that is reflected from the fetus may be isolated and the isolated portion of the reflected electronic signal may be analyzed to determine a fetal hemoglobin oxygen saturation level of the fetus. The isolation may be achieved by synchronizing the reflected electronic signal with a fetal heartbeat signal and multiplying the synchronized reflected electronic signal by the synchronized fetal heartbeat signal.
Claims13
A method for determining a fetal hemoglobin oxygen saturation level comprising:
- projecting light of a first wavelength into the abdomen of a pregnant mammal toward a fetus contained therein;
- projecting light of a second wavelength into the abdomen of the pregnant mammal toward the fetus;
- calculating, by a processor, a modulation ratio using information derived from projecting the light of the first and second wavelengths;
- receiving a signal from a pulse oximetry probe of the pregnant mammal to determine an oxygen saturation level of the pregnant mammal's arterial blood;
- and
- determining the fetal hemoglobin oxygen saturation level using said oxygen saturation level of the pregnant mammal's arterial blood and the modulation ratio.
A method for determining a fetal hemoglobin oxygen saturation level comprising:
- projecting light of a first wavelength into the abdomen of a pregnant mammal toward a fetus contained therein;
- projecting light of a second wavelength into the abdomen of the pregnant mammal toward the fetus;
- projecting light of a third wavelength directed toward the abdomen of the pregnant mammal toward the fetus in order to account for the depth of fetus of the pregnant mammal;
- calculating, by a processor, a modulation ratio using information derived from projecting the light of the first wavelength and the second wavelength;
- and
- determining the fetal hemoglobin oxygen saturation level by using a curve that relates the modulation ratio to fetal hemoglobin oxygen saturation level.
A system for determining a fetal hemoglobin oxygen saturation level comprising:
- a first light source adapted to project light of a first wavelength into the abdomen of a pregnant mammal toward a fetus contained therein;
- a second light source adapted to project light of a second wavelength into the abdomen of the pregnant mammal toward the fetus;
- a pulse oximetry probe;
- a processor, the processor being configured to:
- calculate a modulation ratio using information derived from projecting the light of the first and second wavelengths;
- using a signal from received from the pulse oximetry probe to determine an oxygen saturation level of the pregnant mammal's arterial blood;
- and
- determine the fetal hemoglobin oxygen saturation level using said oxygen saturation level of the pregnant mammal's arterial blood.
Dependencies are inferred from the claim text.