O41.1435 Placentitis, third trimester, fetus 5

Name of the Condition

• Placentitis, Third Trimester, Fetus 5 (ICD Code: O41.1435)

Summary

Placentitis in the third trimester is an inflammatory condition affecting the placenta during weeks 27 to 40 of pregnancy, typically resulting from infection. This condition can compromise placental function, potentially impacting maternal and fetal health. Timely management is essential to mitigate risks such as preterm labor, fetal distress, or other complications.

Causes

Placentitis often arises from ascending bacterial or viral pathogens from the vaginal tract, though hematogenous spread (via the bloodstream) or direct contamination can also occur. Common pathogens include group B streptococcus, Escherichia coli, and other organisms associated with genitourinary infections. Risk increases with prolonged rupture of membranes or invasive prenatal procedures.

Risk Factors

• Prolonged rupture of membranes (especially >18 hours)
• Multiple vaginal examinations during labor
• Preterm labor or delivery
• Maternal genitourinary infections
• Invasive prenatal procedures
• Immunocompromised maternal status

Symptoms

• Maternal fever or chills
• Uterine tenderness
• Foul-smelling vaginal discharge
• Fetal tachycardia
• Maternal leukocytosis
• Abdominal pain or cramping

Diagnosis

Diagnosis typically involves clinical evaluation of maternal symptoms, laboratory testing (e.g., elevated maternal white blood cell count), and imaging (e.g., ultrasound) to assess placental integrity and fetal well-being. Amniocentesis may be performed to detect intra-amniotic infection.

Treatment Options

Treatment focuses on managing the underlying infection with appropriate antibiotics or antiviral medications, monitoring fetal status, and addressing complications like preterm labor. In severe cases, delivery may be necessary to protect maternal or fetal health.

Prognosis and Follow-Up

Prognosis depends on the severity of infection, gestational age, and promptness of treatment. Close monitoring of maternal and fetal health is required, with follow-up to assess recovery and address potential long-term effects.

Complications

• Preterm labor or delivery
• Fetal growth restriction
• Fetal distress or hypoxia
• Maternal sepsis
• Placental abruption

Lifestyle & Prevention

• Practice good prenatal hygiene to reduce infection risk.
• Attend regular prenatal check-ups for early detection.
• Avoid unnecessary invasive procedures when possible.
• Report symptoms like fever or vaginal discharge promptly.

When to Seek Professional Help

Seek immediate medical attention for symptoms such as fever, abdominal pain, vaginal discharge changes, or reduced fetal movement, as these may indicate worsening infection or fetal distress.

Tips for Medical Coders

Document the specific fetus number (5) and trimester (third) to ensure accurate coding. Include clinical details supporting the diagnosis, such as infection signs or imaging findings, to justify the code assignment.