Pressão intra-abdominal em bovinos
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Data
2022-07-06
Autores
Silva, Paloma Coutinho
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Universidade Estadual Paulista (Unesp)
Resumo
A pressão intra-abdominal e as repercussões decorrentes da sua variação vêm sendo estudadas no homem há mais de cem anos. Na Medicina Veterinária, somente há cerca de uma década foram iniciados estudos em grandes animais, com enfoque nos cavalos. Neste aspecto, pouco ou praticamente nada se sabe a respeito da pressão intra-abdominal dos bovinos. Em função disso, buscou-se obter valores de referência da pressão intra-abdominal, pelo método direto (invasivo), com os animais mantidos em posição quadrupedal. Para este fim, foram utilizados 25 animais, 16 machos não castrados e 9 fêmeas não prenhes, com peso corpóreo entre 350 e 500 kg, idade entre 3,5 e 12 anos, sem histórico prévio de afecções do sistema gastrintestinal, considerados hígidos com base em avaliação clínica e hematológica. A mensuração da pressão intra-abdominal direta foi realizada por meio da abdominocentese, seguindo protocolo de antissepsia e bloqueio anestésico (lidocaína 2%) prévios. O registro direto foi efetuado por meio de introdução da cânula mamária de 10 cm de comprimento nos quadrantes dosal esquerdo (DE) e dorsal direito (DD), médio esquerdo (ME) e médio direito (MD), previamente conectada à sistema de coluna d’água (equipo de registro de pressão venosa central [PVC]). Foram obtidos 10 valores pressóricos, ao final de cada fase do ciclo respiratório, para cada um dos pontos de registro. Houve difença (p < 0,05) entre o quadrante dorsal esquerdo comparado aos quadrantes médio esquerdo, médio direito e dorsal direito à inspiração. Já na expiração, apenas o quadrante dorsal direito e médio direito não diferiram. Os valores da mediana expressos em mmHg ao final da inspiração foram: DE -8,5 mmHg, DD -7 mmHg, ME -7 mmHg, MD -7,5 mmHg.; na expiração: DE -9 mmHg, DD -8 mmHg, ME -7,5 mmHg E MD -8 mmHg. Os resultados demonstram a presença de gradiente pressórico no abdômen dos bovinos.
Intra-abdominal pressure and the repercussions resulting from its variation have been studied in men for over a hundred years. In Veterinary Medicine, only about a decade ago studies were started in large animals, with a focus on horses. In this aspect, little or practically nothing is known about the intra- abdominal pressure of cattle. As a result, we sought to obtain reference values for intraabdominal pressure, by the direct method (invasive), with the animals kept in a quadrupedal position. For this purpose, 25 animals were used, 16 non- castrated males and 9 non-pregnant females, with body weight between 350 and 500 kg, aged between 3.5 and 12 years, with no previous history of gastrointestinal disorders, considered healthy based on clinical and hematological evaluation. The measurement of direct intra-abdominal pressure was performed by means of abdominocentesis, following a previous protocol of antisepsis and anesthetic block (2% lidocaine). Direct recording was performed by introducing a 10-cmlong breast cannula into the left (DE) and right dorsal (DD), left middle (LM) and right middle (MD) quadrants, previously connected to the spinal column system. water (central venous pressure recording equipment [PVC]). Ten blood pressure values were obtained at the end of each phase of the respiratory cycle for each of the recording points. There was a difference (p< 0.05) between the left dorsal quadrant compared to the left middle, right middle and right dorsal quadrants at inspiration. On expiration, only the right dorsal and right middle quadrants did not differ. The median values expressed in mmHg at the end of inspiration were: DE -8,5 mmHg, DD -7 mmHg, ME -7 mmHg, MD -7,5 mmHg.; on expiration: DE -9 mmHg, DD -8 mmHg, ME -7,5 mmHg E MD -8 mmHg. The results demonstrate the presence of a pressure gradient in the bovine abdomen.
Intra-abdominal pressure and the repercussions resulting from its variation have been studied in men for over a hundred years. In Veterinary Medicine, only about a decade ago studies were started in large animals, with a focus on horses. In this aspect, little or practically nothing is known about the intra- abdominal pressure of cattle. As a result, we sought to obtain reference values for intraabdominal pressure, by the direct method (invasive), with the animals kept in a quadrupedal position. For this purpose, 25 animals were used, 16 non- castrated males and 9 non-pregnant females, with body weight between 350 and 500 kg, aged between 3.5 and 12 years, with no previous history of gastrointestinal disorders, considered healthy based on clinical and hematological evaluation. The measurement of direct intra-abdominal pressure was performed by means of abdominocentesis, following a previous protocol of antisepsis and anesthetic block (2% lidocaine). Direct recording was performed by introducing a 10-cmlong breast cannula into the left (DE) and right dorsal (DD), left middle (LM) and right middle (MD) quadrants, previously connected to the spinal column system. water (central venous pressure recording equipment [PVC]). Ten blood pressure values were obtained at the end of each phase of the respiratory cycle for each of the recording points. There was a difference (p< 0.05) between the left dorsal quadrant compared to the left middle, right middle and right dorsal quadrants at inspiration. On expiration, only the right dorsal and right middle quadrants did not differ. The median values expressed in mmHg at the end of inspiration were: DE -8,5 mmHg, DD -7 mmHg, ME -7 mmHg, MD -7,5 mmHg.; on expiration: DE -9 mmHg, DD -8 mmHg, ME -7,5 mmHg E MD -8 mmHg. The results demonstrate the presence of a pressure gradient in the bovine abdomen.
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Palavras-chave
Manometria, Ruminantes, Bovinos, Cavalos doenças, Hipertensão intra-abdominal