O46.013 Antepartum hemorrhage with afibrinogenemia, third trimester

Name of the Condition

• Antepartum Hemorrhage with Afibrinogenemia, Third Trimester

Summary

Antepartum hemorrhage refers to bleeding from the genital tract during pregnancy, typically after 20 weeks of gestation. When associated with afibrinogenemia in the third trimester, the bleeding is exacerbated by a severe deficiency of fibrinogen, a critical protein for blood clotting. This condition can complicate management and increase risks to both the mother and fetus due to impaired clot formation.

Causes

Afibrinogenemia in antepartum hemorrhage may result from congenital deficiencies (e.g., inherited fibrinogen disorders) or acquired conditions such as severe liver disease, disseminated intravascular coagulation (DIC), or massive blood loss that depletes fibrinogen stores. Pregnancy-related complications like placental abruption or previa can also trigger or worsen this coagulation defect.

Risk Factors

• Congenital fibrinogen deficiency
• Severe liver dysfunction
• Previous history of bleeding disorders
• Placental abruption or previa
• Multiple pregnancies
• Use of anticoagulant medications

Symptoms

• Vaginal bleeding (ranging from spotting to heavy flow)
• Excessive bruising or prolonged bleeding from minor injuries
• Fatigue or weakness (due to blood loss)
• Signs of coagulation issues, such as petechiae or uncontrolled bleeding

Diagnosis

Diagnosis involves assessing the bleeding pattern and evaluating coagulation status through laboratory tests, including fibrinogen levels, prothrombin time (PT), and activated partial thromboplastin time (aPTT). Imaging studies (e.g., ultrasound) may be used to identify obstetric causes like placental abruption or previa. Clinical correlation with symptoms and history is essential for accurate diagnosis.

Treatment Options

Treatment focuses on controlling bleeding and correcting the fibrinogen deficiency. This may include blood transfusions, fibrinogen replacement therapy, and addressing underlying causes (e.g., placental abruption). Obstetric management, such as delivery if necessary, may be required to stabilize the mother and fetus.

Prognosis and Follow-Up

Prognosis depends on the severity of bleeding, timely intervention, and underlying causes. Close monitoring of coagulation parameters and fetal well-being is critical. Follow-up includes regular assessments of fibrinogen levels and obstetric care to prevent recurrence or complications.

Complications

• Severe maternal hemorrhage
• Fetal distress or loss
• Disseminated intravascular coagulation (DIC)
• Postpartum hemorrhage
• Organ damage due to prolonged bleeding

Lifestyle & Prevention

• Avoid activities with high injury risk during pregnancy.
• Manage underlying conditions (e.g., liver disease) with medical guidance.
• Attend all prenatal appointments for monitoring.
• Inform healthcare providers of bleeding disorders or family history.

When to Seek Professional Help

Seek immediate medical attention for heavy vaginal bleeding, severe abdominal pain, dizziness, or signs of shock (e.g., rapid heart rate, low blood pressure). Prompt evaluation is essential to prevent life-threatening complications.

Tips for Medical Coders

Document the trimester (third trimester) and confirm the presence of afibrinogenemia. Ensure clinical documentation supports the diagnosis, including coagulation test results or obstetric complications. Code O46.013 is specific to antepartum hemorrhage with afibrinogenemia in the third trimester; verify no conflicting or more specific codes apply.