Revista do Colégio Brasileiro de Cirurgiões
versão impressa ISSN 0100-6991versão On-line ISSN 1809-4546
BOTTER, Flávia Coelho de Souza; TAHA, Murched Omar; FAGUNDES, Djalma José e FAGUNDES, Anna Tereza Negrini. The role of pneumoperitoneum in the respiratory and hemodynamic evaluation in anaesthetized rats, with or without intubation. Rev. Col. Bras. Cir. [online]. 2005, vol.32, n.5, pp.261-266. ISSN 0100-6991. http://dx.doi.org/10.1590/S0100-69912005000500008.
BACKGROUND: To investigate hemodynamic and respiratory changes in rats submitted to CO2 pneumoperitoneum or not, under anesthesia with and without endotracheal intubation. METHODS: Male albino rats (n = 40), average weight of 300g, three months aged, were randomized: GA - anesthesia with endotracheal intubation for one hour with CO2 pneumoperitoneum (4mmHg); GB - anesthesia without intratracheal intubation for one hour with CO2 pneumoperitoneum (4mmHg); GC - anesthesia without endotracheal intubation for one hour without pneumoperitoneum; GD - anesthesia with endotracheal intubation for one hour without pneumoperitoneum. Median arterial pressure (MAP- mmHg), heart rate (HR-beat/min), respiratory frequency (RF - rm/min), central venous pressure (CVP - cmH2O), peripheral oxygen saturation (STO2), partial CO2 pressure (PaCO2), arterial bicarbonate (HCO3-), oxygen saturation (SO2) and pH were recorded. Measurements were performed at the begining of the procedure (MO) and after, 30 minutes (M1) and 60 minutes (M2). RESULTS: In GA and GC (groups with CO2 pneumoperitoneum) there was an increase of MAP, PaCO2, HCO3-, HR, CVP and decrease of pH, CO2, STO2 in comparison with those without pneumoperitoneum. On the other hand, endotracheal intubation attenuated these changings during the first hour of anesthesia. CONCLUSION: General anesthesia with endotracheal intubation, associated to CO2 pneumoperitoneum (4 mmHg) during one hour, proved advantageous in hemodynamic and respiratory systems, in relation to the animals with pneumoperitoneum without endotraqueal intubation, and to those within four hour of anesthesia, in spite of intubation.
Palavras-chave : Pneumoperitoneum; intubation; intratracheal; Rats; Video-Assisted Surgery.