System and method for probability based determination of estimated oxygen saturation
AssigneeNellcor Puritan Bennett LLC
InventorSteven E. Pav
Life of this patent
Estimating the term…
Abstract
Embodiments of the present invention relate to a method of estimating a blood flow characteristic in a patient. Present embodiments include providing a first probability distribution for an actual value of a function of the blood flow characteristic based on a previous value of the function, providing a second probability distribution describing a probability that observations of the blood flow characteristic were made given that the blood flow characteristic took a certain value, and combining the first and second probability distributions to facilitate selection of a most likely value of the function for posting as the value of the estimated blood flow characteristic.
Claims29
A method of estimating a blood flow characteristic in a patient, comprising:
- providing a first probability distribution for an actual value of a function of the blood flow characteristic based on a previous value of the function;
- providing a second probability distribution describing a probability that observations of the blood flow characteristic were made given that the blood flow characteristic took a certain value;
- and
- combining the first and second probability distributions to facilitate selection of a most likely value of the function for posting as the value of the estimated blood flow characteristic.
The method of claim 13, comprising emitting the light at a third wavelength.
A method of estimating a blood flow characteristic in a patient, comprising:
- determining a probability distribution of transition for the blood flow characteristic based on a single previous value of the blood flow characteristic;
- calculating a new value for the blood flow characteristic;
- determining a probability distribution of observation describing a probability that observations of the blood flow characteristic were made given that the blood flow characteristic took a certain value;
- and
- combining the probability distribution of transition and the probability distribution of observation to facilitate selection of a probable value of the blood flow characteristic.
An apparatus for estimating a blood flow characteristic in a patient, comprising:
- a sensor configured to facilitate establishment of a measured value of the blood flow characteristic;
- a first probability distribution component configured to provide a first probability distribution for an actual value of a function of the blood flow characteristic based on a previous value of the function;
- a second probability distribution component configured to provide a second probability distribution describing a probability that observations of the blood flow characteristic were made given that the blood flow characteristic took a certain value;
- and
- a combining component configured to combine the first and second probability distributions to facilitate selection of a most likely value of the function for posting as the value of the estimated blood flow characteristic.
Dependencies are inferred from the claim text.