Changes in uterine electromyography according to cervical dilatation in the first stage of labor
Background: Myometrial contractile activity can be evaluated by recording uterine electromyography (EMG) non-invasively from the abdominal surface. Uterine EMG has been shown to detect contractions during labor as reliably as tocography (TOCO) and intrauterine pressure catheters. To evaluate whether...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IMR Press
2021-08-01
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| Series: | Clinical and Experimental Obstetrics & Gynecology |
| Subjects: | |
| Online Access: | https://www.imrpress.com/journal/CEOG/48/4/10.31083/j.ceog4804139 |
| _version_ | 1811256426248536064 |
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| author | Neža Sofija Pristov Ela Rednak Ksenija Geršak Andreja Trojner Bregar Miha Lučovnik |
| author_facet | Neža Sofija Pristov Ela Rednak Ksenija Geršak Andreja Trojner Bregar Miha Lučovnik |
| author_sort | Neža Sofija Pristov |
| collection | DOAJ |
| description | Background: Myometrial contractile activity can be evaluated by recording uterine electromyography (EMG) non-invasively from the abdominal surface. Uterine EMG has been shown to detect contractions during labor as reliably as tocography (TOCO) and intrauterine pressure catheters. To evaluate whether changes in uterine EMG throughout the first stage of labor correlate with advancing cervical dilatation. Methods: Uterine EMG was recorded from the abdominal surface for 30 minutes in 32 women during the first stage of labor at term. Women were divided in three groups according to cervical dilatation at the time of EMG recording: <3 cm (n = 4), 3–5 cm (n = 19), and 6–10 cm (n = 9). Power density spectrum (PDS) peak frequencies within EMG bursts were compared between groups using ANOVA (p < 0.05 significant). Bonferroni post-hoc test was used for pair-wise comparison among groups. Results: PDS peak frequencies were significantly different in the three groups (p < 0.001). PDS peak frequency in the ≥6 cm dilatation group (0.52 ± 0.06 Hz) was significantly higher than in the <3 cm group (0.41 ± 0.02 Hz; p = 0.001) and 3 to 5 cm group (0.44 ± 0.04 Hz, p = 0.001). Difference between <3 cm and 3 to 5 cm groups was not statistically significant (p = 0.55). Discussion: Uterine EMG PDS peak frequencies increase with increasing cervical dilatation during the first stage of labor. |
| first_indexed | 2024-04-12T17:40:03Z |
| format | Article |
| id | doaj.art-f21671e3c4024d00bae67ba9eff5ca7c |
| institution | Directory Open Access Journal |
| issn | 0390-6663 |
| language | English |
| last_indexed | 2024-04-12T17:40:03Z |
| publishDate | 2021-08-01 |
| publisher | IMR Press |
| record_format | Article |
| series | Clinical and Experimental Obstetrics & Gynecology |
| spelling | doaj.art-f21671e3c4024d00bae67ba9eff5ca7c2022-12-22T03:22:50ZengIMR PressClinical and Experimental Obstetrics & Gynecology0390-66632021-08-0148488388710.31083/j.ceog4804139S0390-6663(21)00142-1Changes in uterine electromyography according to cervical dilatation in the first stage of laborNeža Sofija Pristov0Ela Rednak1Ksenija Geršak2Andreja Trojner Bregar3Miha Lučovnik4Department of Perinatology, Division of Obstetrics and Gynecology, University Medical Center Ljubljana, 1000 Ljubljana, SloveniaDepartment of Perinatology, Division of Obstetrics and Gynecology, University Medical Center Ljubljana, 1000 Ljubljana, SloveniaDepartment of Perinatology, Division of Obstetrics and Gynecology, University Medical Center Ljubljana, 1000 Ljubljana, SloveniaDepartment of Perinatology, Division of Obstetrics and Gynecology, University Medical Center Ljubljana, 1000 Ljubljana, SloveniaDepartment of Perinatology, Division of Obstetrics and Gynecology, University Medical Center Ljubljana, 1000 Ljubljana, SloveniaBackground: Myometrial contractile activity can be evaluated by recording uterine electromyography (EMG) non-invasively from the abdominal surface. Uterine EMG has been shown to detect contractions during labor as reliably as tocography (TOCO) and intrauterine pressure catheters. To evaluate whether changes in uterine EMG throughout the first stage of labor correlate with advancing cervical dilatation. Methods: Uterine EMG was recorded from the abdominal surface for 30 minutes in 32 women during the first stage of labor at term. Women were divided in three groups according to cervical dilatation at the time of EMG recording: <3 cm (n = 4), 3–5 cm (n = 19), and 6–10 cm (n = 9). Power density spectrum (PDS) peak frequencies within EMG bursts were compared between groups using ANOVA (p < 0.05 significant). Bonferroni post-hoc test was used for pair-wise comparison among groups. Results: PDS peak frequencies were significantly different in the three groups (p < 0.001). PDS peak frequency in the ≥6 cm dilatation group (0.52 ± 0.06 Hz) was significantly higher than in the <3 cm group (0.41 ± 0.02 Hz; p = 0.001) and 3 to 5 cm group (0.44 ± 0.04 Hz, p = 0.001). Difference between <3 cm and 3 to 5 cm groups was not statistically significant (p = 0.55). Discussion: Uterine EMG PDS peak frequencies increase with increasing cervical dilatation during the first stage of labor.https://www.imrpress.com/journal/CEOG/48/4/10.31083/j.ceog4804139uterine electromyography (uterine emg)electrohysterography (ehg)cervical dilatationlabor |
| spellingShingle | Neža Sofija Pristov Ela Rednak Ksenija Geršak Andreja Trojner Bregar Miha Lučovnik Changes in uterine electromyography according to cervical dilatation in the first stage of labor Clinical and Experimental Obstetrics & Gynecology uterine electromyography (uterine emg) electrohysterography (ehg) cervical dilatation labor |
| title | Changes in uterine electromyography according to cervical dilatation in the first stage of labor |
| title_full | Changes in uterine electromyography according to cervical dilatation in the first stage of labor |
| title_fullStr | Changes in uterine electromyography according to cervical dilatation in the first stage of labor |
| title_full_unstemmed | Changes in uterine electromyography according to cervical dilatation in the first stage of labor |
| title_short | Changes in uterine electromyography according to cervical dilatation in the first stage of labor |
| title_sort | changes in uterine electromyography according to cervical dilatation in the first stage of labor |
| topic | uterine electromyography (uterine emg) electrohysterography (ehg) cervical dilatation labor |
| url | https://www.imrpress.com/journal/CEOG/48/4/10.31083/j.ceog4804139 |
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