The residual central venous catheter track--an occult source of lethal air embolism: case report.

Air embolization through a residual track after removal of a central venous catheter is an elusive mechanism of a treacherous problem. Prompt diagnosis is necessary for successful application of established therapy, as demonstrated by this case report. Awareness of this unusual mechanism of air embolism with utilization of simple prophylactic measures, however, remains the best treatment.