Difficult central venous access: can magnetic resonance angiography help?

Thoracoscopic-assisted central line placement for a thrombosed superior vena cava

BACKGROUND

In children who require prolonged and multiple venous catheterizations, the superior vena cava and iliofemoral veins may become occluded, making central venous access a difficult challenge. We report an innovative technique of catheter insertion percutaneously from the neck into the right atrium traversing a thrombosed superior vena cava using video-assisted thoracoscopic surgery.

METHODS

Two children with irreversible intestinal failure had 4 central venous accesses insertions using the above-mentioned technique. Both had occluded major central veins after multiple catheterizations. An interventional radiologist and cardiologist failed to establish a central venous access in both patients.

RESULTS

A 9-year-old boy has a long-term catheter functioning for 8 months, and in an 18-month-old girl, the line was removed accidentally 6 weeks from its insertion and 2 months later for a line leak. It was then reinserted each time using the same technique.

CONCLUSION

This technique of catheter placement into the right atrium using video-assisted thoracoscopic surgery when other conduits are unavailable can be lifesaving in children depending on total parenteral nutrition.

Central venous catheter techniques in infants and children

PURPOSE OF REVIEW

The placement of central venous catheters is often necessary to facilitate optimal anaesthetic and perioperative management or for the long-term management of chronic underlying diseases. Insertion may be a challenge in selected patients, and the risk of infection, thrombosis, and other complications may result in significant risk factors.

RECENT FINDINGS

Ultrasound visualization of the cervical veins with Valsalva manoeuvres significantly increases the rate and safety of central venous cannulation, and decreases needle passes in paediatric patients even with experienced operators. Pericardial effusion with tamponade is a more frequent phenomenon than generally realized, and accurate location of the catheter-tip position is essential. The femoral venous approach has proved to be safe even in premature babies. Clear guidelines for infection control and the prevention of intravascular catheter-related infections in children have been established; however, the high incidence of nosocomial catheter-related infections requires effective prevention strategies. The impact of antimicrobial-impregnated central venous catheters on the prevention of bloodstream infections in children is not yet clear. Routine use of prophylactic antibiosis (i.e. vancomycin) to prevent catheter-related infection cannot be recommended. Thrombolytic therapy with recombinant tissue plasminogen activator is safe, efficient, well tolerated and effective for lysis of catheter-induced intravascular and intracardiac thrombi even in neonates. Embolized catheter fragments can be retrieved in neonates and children by non-surgical interventions using standard procedures applied by paediatric cardiologists.

SUMMARY

Despite a variety of new techniques, the major problem of central venous catheterization in neonates and children remains the prevention of catheter-related infection and infection control.