O88.019 Air embolism in pregnancy, unspecified trimester

Name of the Condition

• Air embolism in pregnancy, unspecified trimester

Summary

Air embolism in pregnancy, unspecified trimester is a rare but serious complication where air enters the maternal vascular system during pregnancy. It can lead to rapid cardiovascular and respiratory compromise, requiring immediate medical intervention.

Causes

Air embolism in pregnancy typically occurs when air is introduced into the venous or arterial circulation, often during procedures such as uterine surgery, invasive diagnostic tests, or trauma to pelvic veins. It may also result from positive-pressure ventilation or central venous catheter placement.

Risk Factors

• Uterine or pelvic surgery during pregnancy.
• Invasive procedures (e.g., amniocentesis, chorionic villus sampling).
• Trauma to the uterus or pelvic vessels.
• Use of positive-pressure ventilation.
• Placement of central venous catheters in obstetric patients.

Symptoms

• Sudden dyspnea, chest pain, or respiratory distress.
• Hypotension, tachycardia, or cardiovascular collapse.
• Neurological symptoms (e.g., seizures, confusion, loss of consciousness).
• Cyanosis or altered mental status.
• Possible "mill wheel" murmur on auscultation.

Diagnosis

Diagnosis is based on clinical suspicion, especially in the context of obstetric procedures, and confirmed by imaging (e.g., echocardiography) or detection of air in the vascular system.

Treatment Options

Treatment focuses on immediate stabilization, including oxygen therapy, positioning the patient in left lateral decubitus or Trendelenburg position, and supportive care. Advanced interventions may include hyperbaric oxygen therapy or aspiration of air from the circulation.

Prognosis and Follow-Up

Prognosis depends on the volume of air introduced and the speed of intervention. Close monitoring for respiratory, cardiovascular, or neurological complications is essential. Follow-up may involve imaging or functional assessments to evaluate recovery.

Complications

Potential complications include permanent neurological damage, myocardial infarction, or death due to cardiovascular collapse. Long-term sequelae may occur if air embolism is not promptly treated.

Lifestyle & Prevention

Preventive measures include careful technique during obstetric procedures, avoiding positive-pressure ventilation in high-risk settings, and using proper positioning during delivery. Awareness of risk factors can help reduce incidence.

When to Seek Professional Help

Seek immediate medical attention if symptoms such as sudden dyspnea, chest pain, or altered mental status occur during or after pregnancy-related procedures.

Tips for Medical Coders

Document the trimester if known; if unspecified, use this code. Ensure clinical correlation with procedures or events that may introduce air into the maternal circulation.