Abstract
Objective: The purpose of this study was to compare uterine electromyography of patients delivering >24 hours from measurement with laboring patients ≤24 hours from measurement. Study design: Fifty patients (group 1: labor, n = 24; group 2: antepartum, n = 26) were monitored using transabdominal electrodes. Group 2 was recorded at several gestations. Uterine electrical "bursts" were analyzed by power-spectrum from 0.34 to 1.00 Hz. Average power density spectrum (PDS) peak frequency for each patient was plotted against gestational age, and compared between group 1 and group 2. Frequency was partitioned into 6 bins, and associated burst histograms compared. Results: Group 1 was significantly higher than group 2 for gestational age (39.87 ± 1.08 vs 32.96 ± 4.26 weeks) and average PDS peak frequency (0.51 ± 0.10 vs 0.40 ± .03 Hz). Histograms were significantly different. A correlation coefficient of .41, with significance, was found with PDS vs gestation. Conclusion: Uterine electromyography in antepartum patients is significantly lower than in laboring patients delivering ≤24 hours from measurement.
Original language | English (US) |
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Pages (from-to) | 23-29 |
Number of pages | 7 |
Journal | American journal of obstetrics and gynecology |
Volume | 193 |
Issue number | 1 |
DOIs | |
State | Published - Jul 2005 |
Keywords
- EMG
- Labor
- Parturition
- Patient monitoring
- Uterine electromyography
ASJC Scopus subject areas
- Obstetrics and Gynecology