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Central Venous Catheter-Associated Deep Venous Thrombosis in Critically Ill Children
1Department of Pediatrics, Yale School of Medicine, New Haven, Connecticut.
Insights
Central venous catheters in critically ill children significantly increase deep venous thrombosis (DVT) risk. Early systemic anticoagulation may prevent catheter-associated thrombosis, with ongoing trials investigating its benefits.
Area of Science:
- Pediatric critical care medicine
- Vascular medicine
- Thrombosis research
Background:
- Central venous catheters are crucial for critically ill children but pose significant risks.
- Deep venous thrombosis (DVT) is a serious complication associated with these catheters in pediatric intensive care units.
Purpose of the Study:
- To identify key risk factors for deep venous thrombosis (DVT) in critically ill children.
- To evaluate the incidence and consequences of catheter-associated thrombosis (CAT) in this population.
- To explore potential prophylactic strategies against CAT.
Main Methods:
- Retrospective analysis of critically ill children with central venous catheters.
- Radiological confirmation of thrombosis.
- Assessment of clinical outcomes including mechanical ventilation duration and postthrombotic syndrome development.
Main Results:
- Central venous catheter use and intensive care unit admission are primary DVT risk factors.
- Catheter-associated thrombosis (CAT) affects at least 18% of critically ill children with catheters.
- Clinically apparent CAT leads to prolonged mechanical ventilation and increases postthrombotic syndrome risk.
Conclusions:
- Catheter-associated thrombosis (CAT) is a significant concern in pediatric intensive care, with most thrombi developing within four days of insertion.
- Pharmacological prophylaxis, including heparin-bonded catheters, has not proven effective.
- Systemic anticoagulation initiated early after catheter insertion shows potential benefit, pending results from ongoing multicenter trials.
Abstract:
The presence of a central venous catheter and admission to the intensive care unit are the most important risk factors for deep venous thrombosis (DVT) in children. At least 18% of critically ill children with a catheter develop radiologically confirmed catheter-associated thrombosis. Clinically apparent thrombosis occurs in 3% of critically ill children with a catheter and is associated with 8 additional days of mechanical ventilation. Even when the thrombus is initially asymptomatic, 8 to 18% of critically ill children with catheter-associated thrombosis develop postthrombotic syndrome. Thrombosis is uncommon within 24 hours after insertion of a nontunneled catheter in critically ill children, but nearly all thrombi have developed by 4 days after insertion. Hypercoagulability during or immediately after insertion of the catheter plays an essential role in the development of thrombosis. Pharmacologic prophylaxis, including local anticoagulation with heparin-bonded catheter, has not been shown to reduce the risk of catheter-related thrombosis in children. Systemic anticoagulation in critically ill children started soon after the insertion of the catheter, however, may be beneficial. A multicenter clinical trial that is testing this hypothesis is currently underway.
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