Comparing uterine electromyography activity of antepartum patients versus term labor patients

Robert E. Garfield; William L. Maner; Lyn B. MacKay; Dietmar Schlembach; George R. Saade

doi:10.1016/j.ajog.2005.01.050

Comparing uterine electromyography activity of antepartum patients versus term labor patients

Robert E. Garfield, William L. Maner, Lyn B. MacKay, Dietmar Schlembach, George R. Saade

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

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)
Pages (from-to)	23-29
Number of pages	7
Journal	American journal of obstetrics and gynecology
Volume	193
Issue number	1
DOIs	https://doi.org/10.1016/j.ajog.2005.01.050
State	Published - Jul 2005
Externally published	Yes

Keywords

EMG
Labor
Parturition
Patient monitoring
Uterine electromyography

ASJC Scopus subject areas

Obstetrics and Gynecology

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10.1016/j.ajog.2005.01.050

Cite this

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title = "Comparing uterine electromyography activity of antepartum patients versus term labor patients",

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.",

keywords = "EMG, Labor, Parturition, Patient monitoring, Uterine electromyography",

author = "Garfield, {Robert E.} and Maner, {William L.} and MacKay, {Lyn B.} and Dietmar Schlembach and Saade, {George R.}",

note = "Funding Information: Supported by NIH grant RO1-37480, and the General Clinical Research Center (GCRC) at the University of Texas Medical Branch (funded from grant M01 RR00073 from the National Center for Research Resources, NIH, USPHS). ",

year = "2005",

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AU - Maner, William L.

AU - MacKay, Lyn B.

AU - Schlembach, Dietmar

AU - Saade, George R.

N1 - Funding Information: Supported by NIH grant RO1-37480, and the General Clinical Research Center (GCRC) at the University of Texas Medical Branch (funded from grant M01 RR00073 from the National Center for Research Resources, NIH, USPHS).

PY - 2005/7

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N2 - 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.

AB - 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.

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Comparing uterine electromyography activity of antepartum patients versus term labor patients

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