SYSTEM AND METHOD FOR PROBABILITY BASED DETERMINATION OF ESTIMATED OXYGEN SATURATION
1 Assignment
0 Petitions
Accused Products
Abstract
Present embodiments include providing an initial estimate of a value representative of a blood flow characteristic at a current timestep, and determining a probability distribution of transition, wherein the probability distribution of transition includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based solely on the initial estimate. Present embodiments further include obtaining an initial measurement of the blood flow characteristic, and determining a probability distribution of measured values, wherein the probability distribution of measured values includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based on the initial measurement. Further, present embodiments include combining the probability of distribution of transition with the probability of distribution of measured values to determine a meaningful blood flow characteristic value, and posting the meaningful blood flow characteristic value.
3 Citations
40 Claims
-
1-20. -20. (canceled)
-
21. A method, comprising:
-
using a monitor for; providing an initial estimate of a value representative of blood oxygen saturation at a current timestep; correlating one or more optical observations obtained during a previous timestep; obtaining a noise estimate based on the correlation; and performing a maximum likelihood calculation to determine a value of blood oxygen saturation that is most likely given the initial estimate, the one or more optical observations, and the noise estimate. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. A system for providing a meaningful blood oxygen saturation value at a current timestep, comprising:
a pulse oximetry monitor configured to; determine a first probability distribution of potential blood oxygen saturation values, based on an initial estimate of a blood oxygen saturation value; determine a second probability distribution of potential blood oxygen saturation values based on an initial measurement of a blood oxygen saturation value; and combine the first and second probability distributions to provide a meaningful blood oxygen saturation value, wherein each probability distribution of potential values includes potential values at a current timestep with associated probabilities of occurrence. - View Dependent Claims (32, 33, 34, 35, 36)
-
37. A pulse oximeter, comprising:
-
a processing device configured to; provide an initial estimate of a value representative of blood oxygen saturation at a current timestep; provide an initial measurement of a value representative of blood oxygen saturation at a current timestep; determine a noise estimate based on a correlation of one or more optical observations during a previous timestep; and perform a maximum likelihood calculation to determine a value of blood oxygen saturation that is most likely given the initial estimate, the initial measurement, and the noise estimate. - View Dependent Claims (38, 39, 40)
-
Specification