Hemodynamic evaluation of dogs submitted to total circulatory arrest using "Inflow Occlusion" technique for different periods of time / Avaliação hemodinâmica de cães submetidos à parada circulatória total através da técnica do "Inflow Occlusion" por diferentes períodos de tempo

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Because of difficulties related to extracorporeal circulation in Veterinary Medicine, more interest occurred about circulatory arrest trough "Inflow Occlusion" technique to correct surgically some cardiac pathologies, such as semilunar valves stenosis. The aim of this study was to compare possible hemodynamic alterations that can occur in dogs submitted to circulatory arrest using "Inflow Occlusion" technique for different periods of time. Twelve mongrel dogs were used in this study divided in two groups, each one submitted to seven or eight minutes of total circulatory arrest. Hemodynamic evaluation was realized during four moments on transoperatory period. Oxygenation parameters were obtained trough pulmonary artery catheter data and hemogasometric analysis. Statistical difference between groups were found on M3 moment, five minutes after circulatory arrest, for mean arterial pressure (MAP), right ventricular systolic stroke index (RVSSI) and left ventricular systolic stroke index (LVSSI). There were two transoperatory deaths on group B, because ventricular fibrillation. Because these deaths, we can say that "Inflow Occlusion" can be realized up to seven minutes on healthy dogs and is contra-indicated for periods of eight minutes. However, clinical studies should be performed in order to use this technique routinely with safe in dogs presenting cardiovascular abnormalities.

ASSUNTO(S)

pulmonary catheter hemodynamic evaluation dogs "inflow occlusion" cães total circulatory arrest avaliação hemodinâmica cateter de artéria pulmonar "inflow occlusion" parada circulatória total

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