Non-traumatic coma in the pediatric intensive care unit: etiology, clinical characteristics and outcome ABSTRACT Background/aim: The purpose of this study was to evaluate the etiology, clinical characteristics and outcome of non-traumatic coma (NTC) among children admitted to a Pediatric Intensive Care Unit (PICU). Materials and methods: A total of 159 children with NTC were included in the study. The Modified Glasgow Coma Scale (GCS) was used to assess consciousness. Patients were classified with regard to etiology. For each patient, demographic and clinical characteristics, survival and degree of disability at PICU discharge were recorded. Results: Median age was 55 months (IQR: 17.0-109.0). The most common cause of NTC was neuroinfection (31.4%) followed by toxic-metabolic conditions (25.8%) and epileptic disorder (15.1%). There was no significant relationship between the level of encephalopathy at admission and NTC etiology. A total of 13 patients died (8.2%). Among the survivors, 61.6% were discharged without any neurologic deficit, 2.8% had severe neurologic disability and 3.4% were in a vegetative state. Complete neurological recovery was significantly more common in patients with toxic metabolic disease, whereas neurological deficits were more frequent in patients with tuberculous meningo-encephalitis (P = 0.01 and P = 0.04, respectively). Higher Pediatric Risk of Mortality III (PRISM III) score at PICU admission (Odds ratio: 1.51, 95% CI: 1.19-1.92; P < 0.001) was the only variable that was independently associated with mortality. The LOS at hospital (Odds ratio: 0.73, 95% CI: 0.58-0.91; P = 0.006) were associated with improved odds of survival. 2 Conclusions: Although results obtained from this single-center study cannot be generalized to the pediatric population, the contribution to the literature in terms of the relationships between NTC etiology and outcome can be crucial for clinical decision-making. We report neuroinfection as the most common cause of NTC, and the only factor that was closely associated with mortality was PRISM III score. Length of hospital stay was inversely correlated to patient mortality.

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Background. Internal carotid artery dissection (ICAD) is a rare but potentially devastating complication after trauma in the pediatric age group. The diagnosis of traumatic dissection is difficult and is usually recognized only when ischemic symptoms appear. We report a pediatric patient with ICAD due to blunt cerebrovascular injury (BCVI). Case. A 14-year-old boy suffered major trauma due to a motor vehicle accident. When the first aid team reached the accident site, he was intubated because of his low Glasgow Coma Score (GCS) and then transported to the nearest emergency department. Cranial computed tomography (CT) showed multiple fractures at the skull base and independent bone fragments in both carotid canals. On the 6th day; a brain magnetic resonance imaging (MRI) was performed to detect diffuse axonal injury. There was a loss of signal in the left internal carotid artery (LICA) tract but the limitation of diffusion was not associated with the same side, conversely there was a limitation of diffusion on the other side, affecting a very large area. CT angiography was performed in order to detect a filling defect and showed dissection in the LICA. The patient did not have any specific neurological symptoms associated with ICAD. Low-dose aspirin was utilized as anticoagulant therapy. On the 25th day of admission, the patient`s GCS was 14, neurologic examination showed no difference between the right and left sides. He was discharged on the 55th day of the accident and was walking without support. Conclusion. Our patient was a rare case in pediatrics due to having a clinically silent form of ICAD. It is very difficult to diagnose ICAD dissection during the early phase in cases with BCVI accompanied by multiple trauma. Even in the absence of typical neurological deficit, the possible presence of ICAD should be explored in patients with cranial fractures encompassing the skull base.