O43.212 Placenta accreta, second trimester

Name of the Condition

• Placenta Accreta, Second Trimester

Summary

Placenta accreta is a condition where the placenta abnormally adheres to the uterine wall, often penetrating or invading the muscle layer. In the second trimester, this condition may be identified during routine prenatal imaging, as the placenta fails to separate properly from the uterine tissue. Early detection is critical to plan for specialized delivery and minimize risks to the mother and fetus.

Causes

The condition arises from abnormal placental implantation, where the placenta attaches too deeply into the uterine wall. This may occur due to scarring from prior uterine surgery, such as cesarean sections, or other uterine abnormalities that disrupt the normal separation process after delivery.

Risk Factors

• Prior uterine surgery, including multiple cesarean deliveries.
• Advanced maternal age.
• Placenta previa (placenta covering the cervix).
• Previous history of morbidly adherent placenta.
• Uterine conditions like fibroids or endometrial scarring.
• Multiparity (having had multiple pregnancies).

Symptoms

• Vaginal bleeding during the second trimester, which may be painless or accompanied by cramping.
• Abnormal placental location noted on prenatal imaging.
• Uterine tenderness or pain during pregnancy.
• Signs of anemia or shock if bleeding occurs.

Diagnosis

Diagnosis is typically made through ultrasound imaging, which may reveal abnormal placental attachment or invasion. Doppler studies may assess blood flow to the placenta, and MRI may be used for further evaluation in complex cases. Prenatal monitoring is essential to track the condition’s progression.

Treatment Options

Management focuses on planning for a specialized delivery, often involving a multidisciplinary team. Options may include scheduled cesarean hysterectomy to control bleeding, or conservative management in select cases. Blood transfusion and intensive care support may be necessary during delivery.

Prognosis and Follow-Up

Prognosis depends on the severity of placental invasion and timely intervention. Close follow-up with obstetric and maternal-fetal medicine specialists is required to monitor for complications. Postpartum recovery may involve additional imaging or procedures to address residual placental tissue.

Complications

• Severe maternal hemorrhage during delivery.
• Uterine rupture or damage requiring hysterectomy.
• Infection or sepsis.
• Preterm birth or fetal distress.
• Long-term maternal morbidity, including infertility or chronic pain.

Lifestyle & Prevention

While placenta accreta cannot always be prevented, reducing risk factors like unnecessary uterine surgeries may help. Prenatal care and early imaging can aid in early detection, allowing for proactive management. Avoiding smoking and maintaining a healthy pregnancy weight may support overall uterine health.

When to Seek Professional Help

Seek immediate medical attention if you experience vaginal bleeding, severe abdominal pain, or signs of shock (e.g., dizziness, rapid heartbeat) during pregnancy. Regular prenatal visits are essential for monitoring high-risk pregnancies.

Tips for Medical Coders

Document the trimester (second trimester) and confirm the diagnosis via imaging or clinical evaluation. Ensure the code O43.212 is used when placenta accreta is identified and documented in the second trimester. Include details of any associated complications or management plans to support accurate coding.