pneumomediastinum

Full Definition

Pneumomediastinum refers to the abnormal presence of air or gas within the mediastinal space, the central compartment of the thoracic cavity. In minimally invasive surgery, this can occur as a complication during thoracoscopic procedures when CO₂ insufflation leads to gas migration into mediastinal tissues. The condition may cause chest pain, dysphagia, or subcutaneous emphysema and requires careful monitoring during recovery.

Usage

Usage note: Often confused with pneumothorax; editors should verify the specific anatomical location being referenced.

In Context

• "The operative report should document any signs of pneumomediastinum observed during the thoracoscopic procedure." — Surgical documentation
• "Post-operative imaging revealed mild pneumomediastinum that resolved spontaneously within 48 hours." — Medical record