Management of Premature Rupture of Membranes on a Scarred Uterus at Term

Risks Associated with the Duration of Rupture of Membranes

The risk of intra-amniotic infection increases significantly with the duration of rupture of membranes, particularly after 18 hours 1
In the case of a scarred uterus, the risk of uterine dehiscence or rupture may be increased by an ascending infection 1
The risk of vertical transmission (in the case of HIV-positive patients) is doubled after 4 hours of rupture of membranes 2, 1
Chorioamnionitis is the most frequent complication and its risk increases with the duration of rupture 1

Within 0-4 hours after rupture, immediate evaluation is recommended to search for signs of infection, labor, or fetal distress, and consideration of induction of labor if there is no spontaneous onset of labor 1, 2
Between 4-18 hours after rupture, close surveillance of signs of infection is necessary, and consideration of acceleration of labor with oxytocin if dilation is minimal and a long labor is anticipated 1, 2
After 18 hours of rupture, antibiotic prophylaxis is indicated regardless of other risk factors, and consideration of cesarean delivery if the patient is not in active labor to limit the risk of infection, particularly in the context of a scarred uterus 1, 2

The risk of postpartum infection is increased in women undergoing cesarean delivery after rupture of membranes and labor, justifying antibiotic prophylaxis after cord clamping 2
If a cesarean delivery was planned (for a scarred uterus with contraindication to vaginal delivery) but the patient presents with recent rupture of membranes, cesarean delivery remains beneficial if performed quickly 2
If the patient presents after 4 hours of rupture of membranes, the benefit of cesarean delivery on the transmission of infectious agents is less clear, but the risk of perioperative infection increases with the duration of rupture 2