O15.02 Eclampsia complicating pregnancy, second trimester

Name of the Condition

• Eclampsia complicating pregnancy, second trimester

Summary

Eclampsia complicating pregnancy, second trimester is a severe, life-threatening condition characterized by the onset of seizures in a pregnant woman with preeclampsia during the second trimester (13–27 weeks of gestation). It requires immediate medical intervention to protect both the mother and fetus, as it involves uncontrolled hypertension and potential organ damage.

Causes

Eclampsia typically develops as a progression of preeclampsia, a disorder involving high blood pressure and protein in the urine during pregnancy. The exact cause is not fully understood, but it is linked to abnormal placental development and endothelial dysfunction, which can lead to widespread vascular spasms and organ damage. Seizures occur when these underlying issues disrupt cerebral blood flow or cause cerebral edema.

Risk Factors

• Preexisting hypertension or chronic kidney disease.
• First pregnancy or pregnancy with a new partner.
• Age extremes (under 20 or over 40).
• Multiple gestation (twins, triplets, etc.).
• Obesity or poor prenatal care.
• History of preeclampsia in previous pregnancies.

Symptoms

• Sudden onset of seizures or convulsions.
• Severe headaches, often described as "thunderclap."
• Visual disturbances (blurred vision, flashing lights).
• Upper abdominal pain, especially under the ribs.
• Nausea, vomiting, or confusion.
• Swelling (edema) in the hands, face, or legs.

Diagnosis

Diagnosis is based on clinical presentation, including seizure activity, combined with signs of preeclampsia (elevated blood pressure, proteinuria). Laboratory tests may show elevated liver enzymes, low platelet counts, or abnormal kidney function. Imaging or further testing may be used to rule out other causes of seizures.

Treatment Options

• Immediate seizure management: Administer magnesium sulfate to prevent further seizures.
• Blood pressure control: Use antihypertensive medications to stabilize blood pressure.
• Delivery: The definitive treatment is delivery of the fetus, even if preterm, to resolve the underlying cause.
• Supportive care: Monitor and manage organ function, fluid balance, and fetal well-being.

Prognosis and Follow-Up

With prompt treatment, outcomes for both mother and fetus can improve, but eclampsia carries risks of maternal organ damage, fetal growth restriction, or preterm birth. Long-term follow-up includes monitoring blood pressure, kidney function, and future pregnancy risks. Women who have had eclampsia require careful management in subsequent pregnancies.

Complications

• Maternal: Stroke, pulmonary edema, kidney failure, or placental abruption.
• Fetal: Preterm birth, low birth weight, or stillbirth.
• Long-term: Increased risk of cardiovascular disease for the mother.

Lifestyle & Prevention

• Attend all prenatal appointments for early detection of preeclampsia.
• Follow prescribed prenatal care, including blood pressure monitoring.
• Maintain a healthy diet and avoid excessive salt intake.
• Report symptoms like headaches, swelling, or visual changes immediately.

When to Seek Professional Help

Seek emergency care if experiencing seizures, severe headaches, chest pain, shortness of breath, or sudden swelling, as these may indicate eclampsia or other complications.

Tips for Medical Coders

Document the timing (second trimester) and confirm the presence of preeclampsia or related hypertensive disorder to support the diagnosis. Ensure clinical notes specify seizure activity and any contributing factors, as these are critical for accurate coding.