A 30-year-old G2P1 with a previous lower segment cesarean section is undergoing a trial of labor at 40 weeks. She suddenly develops severe lower abdominal pain, fetal bradycardia, and cessation of uterine contractions. On examination, the presenting part recedes. Which of the following is the most specific sign of complete uterine rupture?
- A Loss of station of the presenting part ✓
- B Vaginal bleeding
- C Maternal tachycardia
- D Late decelerations on CTG
Correct answer: A. Loss of station of the presenting part
Explanation
Loss of station occurs when the fetus extrudes into the abdominal cavity, which is a hallmark of complete uterine rupture. Vaginal bleeding and maternal tachycardia are non-specific signs of hemorrhage or shock. Late decelerations indicate uteroplacental insufficiency but do not confirm complete rupture of the uterine wall.
Reference: Williams Obstetrics, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.