Análise hemogasométrica arterial e venosa de ovinos submetidos à transposição carotídea e indução de desequilíbrios ácido-básicos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

With the purpose of comparing the parameters of arterial and venous blood gases during inhalational anesthesia with isoflurane in acid-base induced imbalances, 6 sheep Santa Inês were used. To facilitate the serial collection of blood they were prior submitted to carotid transposition technique used by Sweeney and Constantinescu (1992) in horses. We evaluated the success of the technique by ultrasound examination and catheterization, accomplishing 100% of success. Subsequently, all animals were submitted to 4 acid-base imbalance situations, where 3 samples of arterial and venous blood were collected simultaneously by imbalance, with an interval of 10 minutes. Metabolic acidosis was induced with 500mg.Kg-1 ascorbic acid and the metabolic alkalosis was induced with 3.5 meq.kg-1 of sodium bicarbonate 8.4%. The respiratory alkalosis was induced through hyperventilation and increase of the amount of calcium hydroxide lime, the respiratory acidosis was performed with decrease in the respiratory rate and withdrawal of the canister. Monitoring anesthesia was performed to evaluate heart rate (HR), respiratory rate (RR), invasive medium pressure (IMP), SpO2 and body temperature. The data obtained showed compensatory attempts mainly observed in HF and RR during metabolic acidosis. The parameters obtained from blood gas analysis were: pH, pO2, pCO2, HCO3 -, EB e TCO2. The analysis of results showed no significant difference between the parameters of pCO2, bicarbonate, base excess, pH e TCO2. It is, therefore, that samples of venous blood may be used for classification and treatment of acid-base imbalance

ASSUNTO(S)

anestesia inalatória em ovinos transposição da artéria carótida ciências agrárias hemogasometria comparada

ACESSO AO ARTIGO

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