US Patent No. 9,326,722

METHODS OF PREDICTING AND MONITORING LABOR


Patent No. 9,326,722
Issue Date May 03, 2016
Title Methods Of Predicting And Monitoring Labor
Inventorship Roger C. Young, Memphis, TN (US)
Assignee University of Vermont and State Agricultural College, Burlington, VT (US)

Claim of US Patent No. 9,326,722

1. A method of determining labor status in a pregnant subject, the method comprising:
receiving, at an electromyography (EMG) recorder, a plurality of signals, each of the plurality of signals comprising an EMG
signal generated by different regions of a subject's uterine wall and measured with a respective one of a plurality of electrode
pairs, each of the electrode pairs positioned on the subject's abdomen in a manner minimizing or eliminating overlap of the
signal of the plurality of signals measured by two or more of the positioned electrode pairs;

detecting three or more uterine muscle contractions, each of the three or more detected uterine muscle contractions associated
with a respective one of the plurality of signals;

calculating a synchronization factor of the three or more uterine muscle contractions based on a ratio of a summed duration
of each of the three or more detected uterine muscle contractions to a total time spanned by the three or more detected uterine
muscle contractions; and

identifying, responsive to the synchronization factor crossing a predetermined threshold, a labor status of the subject.