Experimental model of intracranial hypertension with continuous multiparametric monitoring in swine



Document title: Experimental model of intracranial hypertension with continuous multiparametric monitoring in swine
Journal: Arquivos de neuro-psiquiatria
Database:
System number: 000569725
ISSN: 0004-282X
Authors: 1
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Institutions: 1University of Sao Paulo Medical School, Division of Neurosurgery, Sao Paulo, SP. Brasil
2University of Sao Paulo Medical School, LIM 26 Experimental Surgery Laboratory, Sao Paulo, SP. Brasil
Year:
Volumen: 71
Number: 10
Pages: 802-806
Country: Brasil
Language: Inglés
Portuguese abstract Objetivo A hipertensão intracraniana (HIC) ocorre em até 50% de todos os pacientes com traumatismo cranioencefálico (TCE). Por isso, é importante estabelecer um modelo animal adequado para estudar a fisiopatologia da HIC refratária, com a perspectiva de desenvolver tratamentos eficazes. Métodos Os animais foram submetidos a um protocolo padrão de anestesia. A hipertensão intracraniana foi estabelecida através de insuflação de um balão. As variáveis HIC foram medidas com a pressão intracraniana (PIC) do parênquima, oximetria, epidural e doppler transcraniano. Resultados A PIC epidural apresentou elevação mais lenta, comparada com a PIC parenquimal. Houve correlação entre a PIC e a oximetria cerebral. O registro da PIC, oximetria e índice de pulsatilidade foi realizado em todos os animais sem dificuldade. Conclusão O modelo descrito parece ser útil para a compreensão de algumas características fisiopatológicas na HIC aguda.
English abstract Objective Intracranial hypertension (IH) develops in approximately 50% of all patients with severe traumatic brain injury (TBI). Therefore, it is very important to identify a suitable animal model to study and understand the pathophysiology of refractory IH to develop effective treatments. Methods We describe a new experimental porcine model designed to simulate expansive brain hematoma causing IH. Under anesthesia, IH was simulated with a balloon insufflation. The IH variables were measured with intracranial pressure (ICP) parenchymal monitoring, epidural, cerebral oximetry, and transcranial Doppler (TCD). Results None of the animals died during the experiment. The ICP epidural showed a slower rise compared with parenchymal ICP. We found a correlation between ICP and cerebral oximetry. Conclusion The model described here seems useful to understand some of the pathophysiological characteristics of acute IH.
Keyword: Experimental model,
Intracranial hypertension,
Transcranial doppler sonography
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