O15.03 Eclampsia complicating pregnancy, third trimester

Name of the Condition

• Eclampsia complicating pregnancy, third trimester

Summary

Eclampsia complicating pregnancy, third trimester is a severe, life-threatening condition characterized by the onset of seizures in a pregnant woman with preeclampsia during the third trimester (28 weeks to delivery). It requires immediate medical intervention to protect both the mother and fetus, as it involves uncontrolled hypertension and potential organ damage. The condition typically arises after 20 weeks of gestation but can occur postpartum as well.

Causes

Eclampsia develops as a progression of preeclampsia, a disorder marked by hypertension and proteinuria during pregnancy. The exact cause is not fully understood, but it is believed to involve abnormal placental development, leading to endothelial dysfunction, systemic inflammation, and vasoconstriction. These changes can trigger seizures when severe.

Risk Factors

• Preexisting chronic hypertension.
• First pregnancy or pregnancy interval less than 2 years.
• Multiple gestation (twins, triplets).
• Obesity (BMI ≥30).
• Age extremes (under 20 or over 40).
• History of preeclampsia or eclampsia in prior pregnancies.
• Autoimmune diseases (e.g., lupus, antiphospholipid syndrome).
• Diabetes mellitus or renal disease.

Symptoms

• New-onset seizures during pregnancy or postpartum period.
• Severe headaches, visual disturbances (blurred vision, photophobia).
• Upper abdominal pain, nausea, or vomiting.
• Sudden weight gain and swelling (edema).
• Elevated blood pressure (hypertension).

Diagnosis

Diagnosis is based on clinical presentation, including new-onset seizures in a pregnant woman with preeclampsia. Key diagnostic steps include measuring blood pressure, assessing proteinuria, and ruling out other causes of seizures. Laboratory tests may evaluate liver and kidney function, and imaging (e.g., MRI) may be used to assess cerebral edema or other complications.

Treatment Options

Treatment focuses on stabilizing the mother and fetus, typically involving antihypertensive medications, magnesium sulfate to prevent seizures, and delivery of the fetus if the pregnancy is at or near term. In severe cases, intensive care monitoring and support for organ function may be necessary.

Prognosis and Follow-Up

With prompt treatment, outcomes for both mother and fetus can improve, but eclampsia remains a high-risk condition. Long-term follow-up is essential to monitor for persistent hypertension, kidney damage, or other complications. Future pregnancies require careful planning and monitoring.

Complications

• Maternal: Stroke, pulmonary edema, kidney failure, placental abruption.
• Fetal: Preterm birth, low birth weight, stillbirth, or neonatal death.

Lifestyle & Prevention

Regular prenatal care, managing preexisting conditions (e.g., hypertension), and early detection of preeclampsia symptoms can reduce risk. Maintaining a healthy weight and avoiding smoking may also help.

When to Seek Professional Help

Seek immediate medical attention if experiencing seizures, severe headaches, visual changes, or sudden swelling during pregnancy. Prompt evaluation is critical to prevent life-threatening complications.

Tips for Medical Coders

Document the trimester (third trimester) and confirm the presence of preeclampsia or related hypertension. Ensure clinical documentation supports the diagnosis and timing of eclampsia to justify the code. Note any associated complications or interventions, as these may impact coding accuracy.