O71.02 Rupture of uterus before onset of labor, second trimester

Name of the Condition

• Rupture of uterus before onset of labor, second trimester

Summary

Rupture of the uterus before the onset of labor in the second trimester is a rare but serious obstetric complication involving a tear in the uterine wall during pregnancy. This condition requires prompt medical attention to manage maternal and fetal risks.

Causes

Uterine rupture in the second trimester may result from uterine overdistension (e.g., multiple gestation or polyhydramnios), prior uterine surgery (e.g., cesarean delivery or myomectomy), or congenital uterine abnormalities. Trauma or spontaneous weakening of the uterine wall can also contribute.

Risk Factors

• Previous uterine surgery (e.g., cesarean section, myomectomy).
• Multiple pregnancies or polyhydramnios.
• Congenital uterine anomalies (e.g., bicornuate uterus).
• History of uterine rupture or severe uterine scarring.
• Use of uterine-stimulating agents (e.g., misoprostol) in the second trimester.

Symptoms

• Sudden, severe abdominal pain.
• Vaginal bleeding or spotting.
• Uterine tenderness or rigidity.
• Fetal distress (e.g., decreased fetal movement, abnormal heart rate).
• Signs of shock (e.g., dizziness, rapid pulse).

Diagnosis

Diagnosis is based on clinical evaluation, including assessment of abdominal pain, uterine tenderness, and fetal status. Ultrasound or MRI may confirm uterine wall integrity. Laboratory tests (e.g., complete blood count) assess for hemorrhage or infection.

Treatment Options

• Immediate surgical repair of the uterine rupture, often requiring hysterectomy if the tear is extensive.
• Blood transfusion to manage hemorrhage.
• Antibiotics to prevent infection.
• Close monitoring of maternal and fetal vital signs.

Prognosis and Follow-Up

Prognosis depends on the extent of rupture, timing of intervention, and maternal/fetal condition. Follow-up includes monitoring for complications (e.g., infection, future pregnancy risks) and counseling on future obstetric care.

Complications

• Maternal hemorrhage or shock.
• Fetal loss or neonatal morbidity.
• Infection (e.g., endometritis).
• Long-term uterine damage affecting future pregnancies.

Lifestyle & Prevention

• Prenatal care to monitor uterine health and address risk factors.
• Avoidance of uterine-stimulating agents in the second trimester unless medically necessary.
• Counseling on delivery options for those with prior uterine surgery.

When to Seek Professional Help

Seek immediate medical attention for sudden severe abdominal pain, vaginal bleeding, or signs of shock during the second trimester.

Tips for Medical Coders

Document the timing (second trimester, pre-labor), location (uterus), and nature (rupture) of the event. Include details on contributing factors (e.g., prior surgery, uterine anomalies) and clinical management to support accurate coding.