OBJECTIVE: The purpose of this study was to compare uterine electromyography of patients delivering>24 hours from measurement with laboring patients<or=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<or=24 hours from measurement.
OBJECTIVE: The purpose of this study was to compare uterine electromyography of patients delivering>24 hours from measurement with laboring patients<or=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<or=24 hours from measurement.
Authors: René Hornung; Sonja Spichtig; Ana Baños; Michèle Stahel; Roland Zimmermann; Martin Wolf Journal: Lasers Med Sci Date: 2010-09-03 Impact factor: 3.161
Authors: Miha Lucovnik; William L Maner; Linda R Chambliss; Richard Blumrick; James Balducci; Ziva Novak-Antolic; Robert E Garfield Journal: Am J Obstet Gynecol Date: 2010-12-08 Impact factor: 8.661
Authors: Dorothy Brooten; Joanne M Youngblut; Jean Hannan; Frank Guido-Sanz; Donna Felber Neff; Wannee Deoisres Journal: Pac Rim Int J Nurs Res Thail Date: 2012-04