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Published on: December 22, 2023
Continuous recording intrarectal pressures during the second phase of labor
S Meyer1, F Salchli, H Bettaieb
1Urogynecology Unit, Department of Gynecology and Obstetrics, CHUV, 46, rue du Bugnon, 1011 Lausanne, Switzerland. sylvain.meyer@chuv.ch
Summary
Intrarectal pressure during labor does not correlate with baby
Area of Science:
- Obstetrics and Gynecology
- Biomedical Engineering
- Pelvic Floor Research
Background:
- The second phase of labor involves significant biomechanical forces on maternal pelvic floor structures.
- Understanding these forces is crucial for assessing potential postpartum pelvic floor dysfunction.
Purpose of the Study:
- To evaluate biomechanical pressures within the rectum during the second stage of labor in nulliparous women.
- To investigate correlations between these intrarectal pressures and key obstetrical parameters: infant birth weight and mode of delivery.
Main Methods:
- A microsystem device was used to record intrarectal pressure parameters (surface area under the pressure curve, peak pressure).
- Measurements were taken during bearing efforts in 59 nulliparous women during the second stage of labor.
- Correlations were analyzed against infant birth weight and delivery mode (spontaneous vs. assisted).
Main Results:
- Intrarectal pressure parameters showed no significant correlation with infant birth weight.
- No significant correlation was found between intrarectal pressures and the mode of delivery (spontaneous, forceps, or vacuum-assisted).
- Significant individual variability in measured pressure parameters was observed among participants.
Conclusions:
- Biomechanical pressures recorded intrarectally during labor's second stage do not correlate with obstetrical parameters.
- This lack of correlation may explain the limited predictive value of these obstetrical parameters for future pelvic floor issues.
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