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The effect of a normal vaginal delivery on anal function
N Rieger1, A Schloithe, G Saccone
1Department of Surgery, Flinders Medical Centre, Bedford Park, South Australia.
Acta Obstetricia Et Gynecologica Scandinavica
|November 5, 1997
Summary
Uncomplicated vaginal delivery significantly reduces anal squeeze pressure in primiparous women, even without detectable sphincter injury. Resting pressure remained unaffected, indicating subtle functional changes post-birth.
Area of Science:
- Obstetrics and Gynecology
- Pelvic Floor Function
- Postpartum Recovery
Background:
- Investigating the impact of childbirth on maternal pelvic floor health is crucial.
- Anal sphincter function is a key component of postpartum recovery.
Purpose of the Study:
- To assess the effect of uncomplicated vaginal delivery on anal sphincter function in first-time mothers.
- To compare functional changes between vaginal delivery and Cesarean section.
Main Methods:
- Prospective study involving 18 primiparous women.
- Anal manometry performed prenatally and 4-6 weeks postpartum.
- Anal ultrasound and pudendal nerve terminal motor latency used to rule out sphincter damage.
Main Results:
- Vaginal delivery group showed a significant decrease in squeeze pressure (269 to 204 cm H2O, p=0.004).
- Resting anal pressure did not significantly change after vaginal delivery (96 to 86 cm H2O, p=0.075).
- Cesarean section group had no significant changes in anal pressures.
Conclusions:
- Normal vaginal delivery impacts anal sphincter function, specifically reducing squeeze pressure.
- These functional changes occur despite the absence of overt sphincter injury.
- Postpartum monitoring of anal function is important after vaginal birth.