Overview
Acute anoxic encephalopathy refers to a syndrome characterized by neurological dysfunction due to severe oxygen deprivation, often involving multisystem involvement and potentially leading to severe complications including mortality 123.Diagnosis
Clinical Presentation: Common features include ophthalmologic and respiratory abnormalities, multisystem involvement, and bilateral basal ganglia involvement on neuroimaging 1.
Laboratory Tests: Elevated serum levels of cytochrome c (>45 ng/ml), TNF-alpha (>15 pg/ml), IL-6 (>60 pg/ml), sTNF-R1 (>2000 pg/ml), AST (>58 IU/dl), and CRP are associated with poor prognosis 23.
Neuroimaging: Bilateral basal ganglia involvement on imaging is a notable finding 1.
Thiamine Levels: Biochemical confirmation of thiamine deficiency may be relevant, though not universally assessed 1.Management
First-Line Treatment: Thiamine administration is strongly recommended, particularly in exclusively breastfed infants and those with bilateral basal ganglia involvement, significantly reducing mortality 1.
Supportive Care: Management should include supportive measures tailored to multisystem dysfunction, including respiratory and cardiovascular support 23.
Inflammatory Markers Monitoring: Regular monitoring of inflammatory markers like IL-6, TNF-alpha, and sTNF-R1 can guide prognosis and treatment adjustments 23.Special Populations
Pediatrics: Exclusive breastfeeding and early infancy are risk factors; thiamine treatment is crucial in this population 1.
Comorbidities: Elevated levels of UN, Cr, AST, LDH, and CRP indicate severity and potential for multiple organ dysfunctions, necessitating aggressive management 3.Key Recommendations
Administer thiamine to patients with acute non-infectious encephalopathy, especially those with bilateral basal ganglia involvement, to significantly reduce mortality (Evidence: Strong 1).
Monitor serum levels of cytochrome c, TNF-alpha, IL-6, sTNF-R1, AST, and CRP early in the course of illness to predict unfavorable outcomes (Evidence: Moderate 23).
Provide comprehensive supportive care addressing multisystem involvement, including respiratory and cardiovascular support, tailored to individual patient needs (Evidence: Expert opinion).References
1 Gurung B, Bhutia TD, Chettri S, Mummadi MK, Bondre VP. Thiamine Responsive Acute Infantile Encephalopathy. Indian journal of pediatrics 2024. link
2 Hosoya M, Kawasaki Y, Katayose M, Sakuma H, Watanabe M, Igarashi E et al.. Prognostic predictive values of serum cytochrome c, cytokines, and other laboratory measurements in acute encephalopathy with multiple organ failure. Archives of disease in childhood 2006. link
3 Morita H, Hosoya M, Kato A, Kawasaki Y, Suzuki H. Laboratory characteristics of acute encephalopathy with multiple organ dysfunctions. Brain & development 2005. link