Related Experiment Video
Updated: Jun 3, 2026

Determination of the Procoagulant Activity of Extracellular Vesicle (EV) Using EV-Activated Clotting Time (EV-ACT)
Published on: August 4, 2023
Coagulopathy after isolated severe traumatic brain injury in children
Peep Talving1, Thomas Lustenberger, Lydia Lam
1Division of Acute Care Surgery, Department of Surgery, Keck School of Medicine, Los Angeles County + University of Southern California Medical Center, Los Angeles, California 90033-4525, USA. peep.talving@surgery.usc.edu
Insights
Severe traumatic brain injury (sTBI) is common in children, with nearly 40% experiencing coagulopathy. Factors like head injury severity and brain contusions are linked to this condition.
Area of Science:
- Pediatric Traumatology
- Neurocritical Care
- Hematology
Background:
- Severe traumatic brain injury (sTBI) in children is understudied regarding coagulopathy.
- Coagulopathy significantly impacts patient outcomes.
Purpose of the Study:
- To determine the incidence of sTBI-associated coagulopathy in pediatric patients.
- To identify risk factors for sTBI coagulopathy in children.
- To assess the impact of coagulopathy on in-hospital outcomes.
Main Methods:
- Retrospective analysis of pediatric patients (<18 years) with isolated sTBI (head AIS ≥3).
- Coagulopathy defined by thrombocytopenia, elevated INR, or prolonged aPTT.
- Analysis of incidence, risk factors, and in-hospital outcomes.
Main Results:
- 42.8% of pediatric sTBI patients developed coagulopathy.
- Incidence increased with head injury severity (AIS score).
- Independent risk factors included low GCS, increasing age, ISS ≥16, and brain contusions.
Conclusions:
- Pediatric sTBI-associated coagulopathy is highly prevalent (approx. 40%) and linked to injury severity.
- Low GCS, older age, high ISS, and intraparenchymal lesions are associated with coagulopathy.
- While coagulopathy is common, it did not significantly impact mortality in this cohort after adjustment.
Introduction:
Few previous studies have been conducted on the severe traumatic brain injury (sTBI)-associated coagulopathy in children. The purpose of this study was to evaluate the incidence and risk factors of sTBI coagulopathy in a pediatric cohort and to evaluate its impact on outcomes.
Methods:
Retrospective analysis of pediatric patients (younger than 18 years) sustaining isolated sTBI [head Abbreviated Injury Scale (AIS) score ≥3 and extracranial injuries AIS score <3]. Criteria for sTBI-associated coagulopathy included thrombocytopenia (platelet count <100,000 per mm(3)) and/or elevated international normalized ratio >1.2 and/or prolonged activated partial thromboplastin time >36 seconds. Incidence and risk factors of sTBI coagulopathy and its impact on in-hospital outcomes were analyzed.
Results:
Overall, 42.8% (n = 137) of the 320 patients studied developed coagulopathy, with increasing incidence in a stepwise fashion with escalating head AIS score (31.1, 46.2, and 88.6% for head AIS score 3, 4, and 5, respectively; p < 0.001). Depressed GCS, increasing age, an ISS ≥16, and brain contusions/lacerations were independently associated with the presence of coagulopathy. The case fatality rate was 7.8% (n = 25); 17.5% versus 0.5% in coagulopathic versus noncoagulopathic patients, respectively. After logistic regression to adjust for confounders, no statistical significant mortality difference in patients with and without coagulopathy was noted (adjusted p = 0.912).
Conclusions:
Incidence of coagulopathy in children suffering isolated sTBI is exceedingly high at 40% and reflect the head injury severity. A low GCS, increasing age, ISS ≥16 and intraparenchymal lesions proved to be independently associated with TBI coagulopathy.
Related Concept Videos
Traumatic Brain Injury l: Introduction
Hemorrhagic Stroke ll: Pathophysiology
Cerebral Edema ll: Pathophysiology
Hemorrhagic Stroke l: Introduction
Increased Intracranial Pressure ll: Pathophysiology

