Uterine rupture after induction of labour for intrauterine death using the prostaglandin E2 analogue sulprostone

Abstract

A 30-year old pregnant woman who had had an earlier stillbirth and 2 children, the oldest of whom was delivered by Cesarean section, presented at the National University Hospital in Singapore at 32 weeks because she had not felt fetal movements for 3 days. Doptone did not detect a fetal heart beat and ultrasound confirmed intrauterine death. She did not have any soreness at the previous lower segment Cesarean scar. After she opted to have labor induced, health workers injected 0.5 mg of the prostaglandin E2 analogue, sulprostone, into a muscle every 6 hours. Painful uterine contractions did not start until after the 2nd injection of sulprostone. 20 hours after the 1st injection, her pulse increased to 100/minute, blood pressure fell from 120/70 to 80/50, and she began to perspire. She noted tenderness at the lower segment scar. Abdominal examination did not reveal any free fluid. There was no blood in the urine. 20 minutes after her blood pressure increased to 100/70, the woman had steady abdominal pain and vaginal bleeding. Her abdomen swelled and rebound tenderness occurred. Physicians diagnosed uterine rupture and performed a laparotomy promptly. They found 800 ml of free blood in the peritoneal cavity and a complete rupture all along the Cesarean scar. The removed the dead fetus and repaired the scar. They also applied Filshie clips on her Fallopian tubes since she wanted to be sterilized. She was discharged 7 days after laparotomy and recovered uneventfully. This case report confirms that vaginal delivery at term after lower segment Cesarean section is no guarantee against scar rupture in subsequent pregnancies, particularly when health workers use prostaglandins. Nevertheless, prostaglandins are still a reasonably safe and predictable method of terminating pregnancy even in cases of previous Cesarean section. It is important that health workers supervise closely women who have had a Cesarean section and are being administered a prostaglandin to terminate a pregnancy because of the possibility of uterine rupture.