Abstract
The technique of total circulatory arrest (TCA), or inflow occlusion , consists in preventing the blood entry into the heart chambers by clamping the vena cava and the cranial and caudal vena azygos. However, changes in physiological parameters of the patient can be triggered with the application of this technique. This technique can be easily used in heart intra-cavity diseases, whose correction takes a few minutes, as in pulmonary stenosis or subaortic stenosis. Because low cost and simple implementation, it may be carried out in private clinics. In this trial, the behavior of heart rate and body temperature of rabbits submitted to two periods of five minutes of TCA, by the use of inflow occlusion technique, was evaluated. A period of blood recirculation between occlusions was performed to verify the potential benefits of this practice on the behavior of heart rate and body temperature of the animals. These parameters were assessed throughout the perioperative period. There were two deaths, both in the recirculation period due to the occurrence of ventricular fibrillation. Nevertheless, with the implementation of the period of blood recirculation, we verified that this technique can be used in intra-cardiac surgery lasting up to 10 minutes. KEYWORDS: Circulatory arrest, inflow occlusion, rabbits.
Highlights
The technique of total circulatory arrest (TCA), or inflow occlusion, consists in preventing the blood entry into the heart chambers by clamping the vena cava and the cranial and caudal vena azygos
Uma vez no interior da cavidade pleural, as veias cavas cranial e caudal, bem como a veia ázigos, foram dissecadas em segmentos de 2 cm a fim de facilitar a sua oclusão pelas pinças vasculares
T. Avaliação hemogasométrica durante a parada circulatória total, inflow occlusion, aplicada por diferentes períodos de tempo em cães sadios
Summary
Daniela Fantini Vale, Renato Moran Ramos, Felipp Silveira Ferreira, Giseli Santos Ferreira, Fabio Ferreira Queiroz, Monica Jorge Luz, Alessandra Castello Costa, Guilherme Monteiro,. Cuja correção leva alguns minutos, como na estenose pulmonar ou na estenose subaórtica, esta técnica pode ser facilmente utilizada. Avaliou-se o comportamento da frequência cardíaca e da temperatura corpórea de coelhos submetidos a dois períodos de cinco minutos de PCT, utilizando-se a técnica da inflow occlusion. Um período de recirculação sanguínea entre as oclusões foi realizado a fim de verificar os potenciais benefícios desta prática sobre o comportamento da frequência cardíaca e temperatura corpórea dos animais, parâmetros avaliados ao longo de todo o período transoperatório. Com a aplicação do período de recirculação do sangue, foi possível constatar que esta técnica pode ser utilizada em cirurgias intracardíacas, com duração de até dez minutos.
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