Central venous catheter-related thrombi detected by routine ultrasound

An observational study assessed the frequency of thrombi related to central venous catheters. Any central venous catheter in place for longer than 14 days was studied with ultrasound surveillance twice a week. Around 1300 catheters were studied, and 10% of them were found to have a thrombus related to the venous catheter. These catheters with thrombi were more likely to be removed for non-elective reasons than those without thrombi. To detect one thrombus 14 ultrasounds had to be performed.

Routine surveillance ultrasound for management of central venous catheters. Haddad et al, 2014.