Polysomnograph scoring
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United States of America Patent
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Mar 31, 1998
Grant Date -
N/A
app pub date -
Jul 5, 1994
filing date -
Mar 17, 1992
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Abstract
A method and apparatus for scoring EEG, EMG and EOG data, for sleep stages, in order to simulate the scoring results achieved by human scorers in which a general determination is initially made of the presence or absence of a plurality of elemental events. This determination is employed to develop the probabilities of the occurrence of the elemental events. These probabilities are then employed as a base to determine the probabilities of the occurrence of Rechtschaffen and Kales events. The Rechtschaffen and Kales event probabilities may be modified to account for the stage 2 rule and the REM rule. These Rechtschaffen and Kales event probabilities are then employed to determine the probability distribution of possible sleep stages for each epoch of the polysomnograph and choose the most likely score.
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