Efeito da elevação da cabeceira do leito na morfologia das ondas da pressão intracraniana monitorada de forma não invasiva em cães saudáveis anestesiados com propofol

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Resumo

O objetivo deste estudo foi monitorar a morfologia das ondas da pressão intracraniana de forma não invasiva (Ni-ICP) e avaliar a razão P2/P1 em cães saudáveis sob anestesia geral com propofol em diferentes ângulos de elevação da cabeceira do leito (HOB). 23 animais foram incluídos. Dados de sete animais foram excluídos pois o excesso de artefatos na forma de onda inviabilizou a análise confiável da Ni-ICP, resultando em uma amostra final de 16 animais. Após indução e manutenção anestésica com infusão contínua de propofol, os animais foram posicionados em decúbito lateral sobre uma prancha reclinável. A morfologia das ondas da Ni-ICP foi registrada utilizando um sensor do tipo extensômetro colocado sobre a pele da região parietal do crânio. O monitoramento foi realizado com a HOB em 0°, 15° e 30°, e novamente a 0°. Os dados foram apresentados como média ± desvio-padrão. A ANOVA de medidas repetidas foi utilizada para comparar a razão P2/P1 entre as diferentes posições de elevação da cabeceira, enquanto a correlação de Pearson, com correção para múltiplas comparações pelo método de Benjamini–Hochberg (False Discovery Rate – FDR), foi empregada para avaliar a associação entre a razão P2/P1 e as variáveis fisiológicas. O nível de significância adotado foi de p < 0,05. A idade média dos cães foi de 1,7 anos e o peso corporal médio foi de 4,4 kg. A razão P2/P1 média foi de 0,91 ± 0,17 em 0°, 1,00 ± 0,22 em 15°, 0,93 ± 0,26 em 30°, e 0,91 ± 0,23 após o retorno a 0°. Não foram encontradas diferenças significativas na razão P2/P1 média entre os diferentes ângulos de HOB. Esses achados fornecem valores de referência preliminares para as ondas da PIC-Ni e para a razão P2/P1 em cães saudáveis sob condições experimentais. Além disso, estabelecem um referencial metodológico para futuros estudos que avaliem o posicionamento da cabeça em cães com suspeita de hipertensão intracraniana.
Palavras-chave: perfusão cerebral; líquido cerebroespinhal; trauma cranioencefálico.

Keywords: cerebral perfusion; cerebrospinal fluid; traumatic brain injury.

 

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Publicado

2026-09-01

Como Citar

SILVA, Matheus Henrique Dario; BERNARDES, Giselle de Lima; SPRENGEL, Henrique Zem Chequin; GREGHI, Julia Rodrigues; CARDOSO, Guilherme Schiess; ARIAS, Mônica Vicky Bahr. Efeito da elevação da cabeceira do leito na morfologia das ondas da pressão intracraniana monitorada de forma não invasiva em cães saudáveis anestesiados com propofol. Ciência Animal Brasileira / Brazilian Animal Science, Goiânia, v. 27, 2026. Disponível em: https://revistas.ufg.br/vet/article/view/85530. Acesso em: 5 out. 2026.

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MEDICINA VETERINÁRIA

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