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Published on: February 10, 2023
Incidence and risk factors associated with venous thrombotic events in pediatric intensive care unit patients
Renee A Higgerson1, Karla A Lawson, Leeann M Christie
1Dell Children's Medical Center of Central Texas, Austin, TX, USA.
Insights
Children in pediatric intensive care units (PICUs) face a significant risk of venous thromboembolism (VTE). Central venous catheters (CVCs) are the primary risk factor, leading to increased mortality and longer ICU stays.
Area of Science:
- Pediatric Critical Care Medicine
- Hematology
- Vascular Medicine
Background:
- Venous thromboembolism (VTE) is a serious complication in critically ill children.
- Understanding VTE incidence and risk factors in pediatric intensive care units (PICUs) is crucial for patient management.
Purpose of the Study:
- To determine the incidence and identify risk factors for VTE in children admitted to PICUs.
- To compare characteristics and outcomes of VTE patients with non-VTE patients.
Main Methods:
- Prospective observational study conducted in 11 US tertiary care PICUs.
- Enrolled children with radiographically confirmed VTE over a 6-month period.
- Collected demographic, patient-related, and outcome data; compared with all PICU admissions.
Main Results:
- Sixty-six VTE events occurred in 62 of 6653 PICU admissions (0.74% incidence).
- Strongest risk factors identified: central venous catheter (CVC) use (OR 6.9) and mechanical ventilation (OR 2.8).
- VTE patients were younger, sicker (higher PIM2 score), had longer ICU stays, and experienced higher mortality (10.2% vs. 2.6%).
Conclusions:
- Children in PICUs have a substantial risk of VTE.
- CVC presence is the most significant risk factor for VTE in this population.
- VTE is associated with poorer outcomes, including increased mortality and prolonged ICU admission.
Objective:
To evaluate the incidence and risk factors associated with venous thromboembolism (VTE) in children admitted to pediatric intensive care units (PICUs).
Design:
Prospective observational study.
Setting:
Eleven tertiary care PICUs in the United States.
Patients:
Children who were admitted to PICUs and had radiographically confirmed VTE over a rolling 6-month period were enrolled in the study. Demographic, patient-related, and outcomes data were collected and compared with all children admitted during the same period.
Interventions:
None.
Results:
: Sixty-six symptomatic VTE were documented in sixty-two patients among 6653 patients admitted to 11 PICUs. Thirteen (19.7%) of the thrombi were present on admission. The incidence rate was 0.74% (range, 0-2.7% per PICU) with a point prevalence of 0.93%. Doppler ultrasound was most frequently used to diagnose or confirm a suspected VTE. Variables associated with unadjusted risk for VTE include: younger age (3.8 months for patients with VTE vs. 51 months for non-VTE patients, p < .001), cardiac diagnosis (41% in VTE cases vs. 15% in non-VTE, p < .001), pre-/post-operative status (63% in VTE cases vs. 40% in non-VTE, p = .001), presence of central venous catheter (88% in VTE case vs. 17% in non-VTE, p < .001), or mechanical ventilation (85% in VTE cases vs. 30% non-VTE, p < .001). Multivariate analysis showed increased risk of VTE with CVC (odds ratio 6.9; confidence interval 2.7-17.5) and mechanical ventilation (odds ratio 2.8; confidence interval 0.98-7.93). Children with VTE were sicker (Pediatric Index of Mortality 2 score risk of mortality of 3.0% vs. 0.9%; p<0.0001), stayed longer in the ICU (21.2 days vs. 1.6 days; p < .0001) and had increased mortality (10.2% vs. 2.6; p < .0001).
Conclusions:
Children admitted to the PICU have an increased risk of VTE. The presence of a CVC is the strongest risk factor for VTE in this PICU population. Children with VTE were younger, sicker, stayed longer in PICU, and had a higher mortality rate.
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