Surgery – Diagnostic testing – Detecting muscle electrical signal
Patent
1998-07-27
2000-10-17
O'Connor, Cary
Surgery
Diagnostic testing
Detecting muscle electrical signal
600551, 600588, 600595, A61B 5103
Patent
active
061344664
ABSTRACT:
Disclosed are systems and methods for detecting an onset of true labor in a pregnant mammal. In accordance with a method of this invention the following steps are executed: (a) detected electrical signals from a succession of muscular contractions associated with labor; (b) determining an average frequency of the electrical signals for each contraction; (c) determining a discriminant (.delta.) from the determined average frequency for each contraction so as to provide a set of discriminants, individual ones of the set of discriminants being associated with an individual one of the contractions; and (d) indicating a beginning of true labor when a slope of at least two discriminants of the set of discriminants exceeds a first threshold value and when a magnitude of a last determined discriminant exceeds a second threshold value. The onset of true labor can also be indicated when a value of a critical determinant exceeds a threshold value, the value of the critical determinant being obtained from a combination of the slope of at least two discriminants of the set of discriminants and a magnitude of a last determined discriminant.
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Hygeia Biomedical Research Inc.
O'Connor Cary
Wingood Pamela
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