Method and apparatus for estimating a physiological parameter from a physiological signal
AssigneeSiemens Medical Solutions USA, Inc.
InventorJohn W. Huang
Life of this patent
Estimating the term…
Abstract
A system is disclosed which first identifies a plurality of characteristics of a physiological signal any one of which may represent a physiological parameter. A plurality of different techniques are used to provide respective likelihood factors for each such identified characteristic. The resulting likelihood factors are then analyzed to select the one characteristic of the physiological signal which most likely represents the desired physiological parameter. The physiological parameter is then calculated from the selected characteristic of the physiological signal.
Claims24
Apparatus for estimating a physiological parameter from a physiological signal derived from patient blood, comprising:
- a source of the physiological signal;
- a characteristic identification processor, coupled to the physiological signal source, for identifying respective characteristics in the physiological signal;
- at least one likelihood processor, coupled to the characteristic identification processor and deriving likelihood representative values from a function associating probability values with pulse rates, said values respectively corresponding to the identified characteristics and representing a probability that the corresponding identified characteristic is associated with said physiological parameter;
- an arbitrator for selecting one of the identified characteristics in response to the likelihood representative values;
- and
- a computational processor, for estimating the physiological parameter responsive to the selected one of the identified characteristics.
A method for estimating pulse rate from a physiological signal derived from patient blood, comprising the steps of:
- receiving a physiological signal;
- identifying respective characteristics in said received physiological signal;
- deriving likelihood representative values from a function associating probability values with pulse rates, said values respectively corresponding to the identified characteristics and representing a probability that the corresponding identified characteristic is associated with said physiological parameter;
- selecting one of said identified characteristics in response to said likelihood representative values;
- and
- estimating said pulse rate using said selected one of said identified characteristics.
A method for estimating a physiological parameter from a physiological signal derived from patient blood, comprising the steps of:
- receiving a physiological signal;
- identifying respective characteristics in said received physiological signal;
- deriving likelihood representative values from a function associating probability values with pulse rates, said values respectively corresponding to the identified characteristics and representing a probability that the corresponding identified characteristic is associated with said physiological parameter;
- selecting one of said identified characteristics in response to said likelihood representative values;
- and
- estimating said physiological parameter using said selected one of said identified characteristics.
Dependencies are inferred from the claim text.