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Secondary adrenal insufficiency in the acute phase of pediatric traumatic brain injury
Clémentine Dupuis1, Sébastien Thomas, Patrice Faure
1Department of Pediatrics, Pediatric Endocrinology, University Hospital of Grenoble, 38043, Grenoble Cedex 9, France.
Insights
Secondary adrenal insufficiency (AI) is common in children after traumatic brain injury (TBI). This condition, particularly when intracranial hypertension is present, requires systematic pituitary function assessment and may necessitate hormonal replacement therapy.
Area of Science:
- Pediatric Intensive Care
- Neuroendocrinology
- Trauma Management
Background:
- Secondary adrenal insufficiency (AI) is increasingly recognized post-traumatic brain injury (TBI).
- Adult studies suggest AI can occur acutely after TBI, impacting patient management.
- Pediatric TBI patients may be at risk for acute AI.
Purpose of the Study:
- To determine the prevalence and characteristics of AI in the acute phase of pediatric TBI.
- To investigate the association between AI and TBI severity markers.
Main Methods:
- Systematic evaluation of adrenal function in pediatric TBI patients admitted to the ICU.
- Serial cortisol and adrenocorticotropic hormone (ACTH) measurements were collected post-admission.
- AI defined by specific cortisol and ACTH levels.
Main Results:
- Secondary AI was identified in 36% of evaluated pediatric TBI patients.
- AI was significantly more frequent in patients with intracranial hypertension.
- AI was associated with longer mechanical ventilation duration.
Conclusions:
- Secondary AI is a frequent complication during the acute phase of pediatric TBI.
- Intracranial hypertension is a key factor associated with AI in these patients.
- Systematic pituitary function assessment and consideration of hormonal replacement are crucial.
Purpose:
A high incidence of secondary adrenal insufficiency (AI) has been reported several months after a traumatic brain injury (TBI) in pediatric patients. Data from studies in adults suggest that AI may occur during the acute phase of TBI, with potential negative effects in the management of these vulnerable patients. The aim of this study was to describe the prevalence and the characteristics of AI in the acute phase of pediatric TBI.
Methods:
Adrenal function was systematically evaluated in patients admitted to the pediatric intensive care unit following a TBI. Serial measurements of cortisol (9 samples) and adrenocorticotropic hormone (ACTH) were drawn from the second morning to the third morning post admission. Secondary AI was defined as all cortisols < 200 nmol/l (6 μg/dl) with ACTH < 12 pmol/l.
Results:
Twenty-eight patients (2-15 years old) were evaluated. Secondary AI occurred in ten (36%) patients. AI was more frequent in patients with intracranial hypertension (p < 0.05). Patients with AI required longer mechanical ventilation (p < 0.05), and a non-significant trend for a higher Pediatric Logistic Organ Dysfunction score (p = 0.09) and greater norepinephrine dose (p = 0.11) was observed.
Conclusions:
Secondary AI is frequent during the acute phase of pediatric TBI, particularly when intracranial hypertension is present. Systematic assessment of pituitary function after TBI appears to be essential. A randomized clinical trial is warranted to evaluate the benefits of hormonal replacement therapy in TBI patients with AI.
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