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Central venous air embolism without a catheter
1Department of Anesthesiology, Medical College of Wisconsin, Milwaukee 53226.
Summary
Venous air embolism can occur when only a guide wire is in place during central venous catheter procedures. This case highlights a rare complication and emphasizes vigilance during central line manipulation.
Area of Science:
- Medical Procedures
- Patient Safety
- Critical Care Medicine
Background:
- Venous air embolism (VAE) is a known complication of central venous catheterization.
- Previous literature documents VAE during catheter insertion, disconnection, or removal.
- VAE associated with guide wire placement alone has not been previously reported.
Observation:
- A patient presented with signs of VAE, including tachypnea, chest pain, and arterial hypoxemia.
- These symptoms occurred during central venous catheter manipulation with a guide wire in place.
- Pulse oximetry was instrumental in detecting hypoxemia and guiding the diagnosis.
Findings:
- The study presents a unique case of VAE occurring solely around a guide wire.
- A gasp reflex or sustained negative pressure maneuver is postulated as the mechanism.
- This suggests a novel pathway for air entry into the venous system.
Implications:
- Clinicians should maintain a high index of suspicion for VAE during central venous catheter procedures, even with guide wires alone.
- Utilizing pulse oximetry can aid in early detection of hypoxemia.
- Implementing preventive measures such as occlusive dressings and patient positioning is crucial.