O41.1295 Chorioamnionitis, unspecified trimester, fetus 5

Name of the Condition

• Chorioamnionitis, Unspecified Trimester, Fetus 5 (ICD Code: O41.1295)

Summary

Chorioamnionitis is an infection of the fetal membranes (chorion and amnion) and amniotic fluid during pregnancy. This condition involves microbial invasion, typically bacterial, and can affect both maternal and fetal health. It is often associated with inflammation and may lead to complications if not managed promptly. The infection can occur at any stage of pregnancy but is more common in the second or third trimester.

Causes

The infection usually results from bacteria ascending from the vaginal tract into the uterus, though hematogenous spread (via the bloodstream) or direct contamination can also occur. Common pathogens include group B streptococcus, Escherichia coli, and other vaginal flora. Risk increases with prolonged rupture of membranes or invasive procedures during pregnancy.

Risk Factors

• Prolonged rupture of membranes (especially >18 hours)
• Multiple vaginal examinations during labor
• Preterm labor or delivery
• Maternal infections (e.g., urinary tract infections)
• Low socioeconomic status or limited prenatal care
• History of prior intrauterine infections

Symptoms

• Maternal fever (≥38°C or 100.4°F)
• Maternal tachycardia (≥100 beats per minute)
• Fetal tachycardia (≥160 beats per minute)
• Uterine tenderness
• Foul-smelling amniotic fluid

Diagnosis

Diagnosis is typically based on clinical criteria, including maternal fever, maternal or fetal tachycardia, uterine tenderness, and foul-smelling amniotic fluid. Laboratory tests may include amniotic fluid culture, maternal blood cultures, or inflammatory markers like C-reactive protein. Imaging or ultrasound may be used to assess fetal well-being or detect complications.

Treatment Options

Treatment usually involves intravenous antibiotics to target common pathogens. Delivery may be expedited if the infection is severe or if the fetus is at risk. Supportive care, such as hydration and monitoring, is also provided. The choice of antibiotics and timing of delivery depends on the clinical situation and gestational age.

Prognosis and Follow-Up

Prognosis varies based on the severity of the infection, gestational age, and promptness of treatment. Most cases resolve with appropriate management, but complications can occur. Follow-up may include monitoring for maternal or fetal recovery, assessing for long-term effects, and ensuring proper care for any resulting issues.

Complications

• Preterm birth
• Neonatal sepsis or pneumonia
• Maternal postpartum infection
• Fetal distress or stillbirth
• Long-term developmental issues in the infant

Lifestyle & Prevention

• Attend regular prenatal care to monitor for infections
• Avoid unnecessary vaginal examinations during pregnancy
• Treat maternal infections promptly (e.g., urinary tract infections)
• Follow guidelines for managing prolonged rupture of membranes

When to Seek Professional Help

Seek immediate medical attention if experiencing fever, abdominal pain, or signs of infection during pregnancy. Prompt evaluation is critical to prevent complications for both mother and fetus.

Tips for Medical Coders

When coding O41.1295, ensure the documentation specifies chorioamnionitis in an unspecified trimester affecting fetus 5. Verify that the clinical notes support the diagnosis and include details about the infection and its impact on the fetus. Accurate documentation of trimester and fetus number is essential for correct code assignment.