Anestesia para colecistectomia laparoscópica: avaliaçåo das alteraçöes respiratórias / Anesthesia for laparoscopic cholecystectomy: evaluation of respiratoy changes

ABSTRACT

The purpose of this study was evaluate the respiratory chnges of 24 ASA I OR II patients undergoing laparoscopic cholecystectomy under controlled mechanic ventilation. The anesthetic induction was performed with fentanyl (0.003-0.004 mg/kg), propofol (2-3 mg/kg), atracurium (0,5 mg/kg) and maintained with halothane and nitrous oxide (11). The respiratory pattern was adjusted to tidal volume=10 ml/kg; respiratory rate= 10/min; I/E= 1/2. The endotracheal (PET) and intra-abdominal pressure,the oxygen saturation (SpO2) and end CO2 (PET CO2) were studied. These parameters were registred 1 minute after tracheal intubation (T0), 1 minute after insuflation of the peritoneal cavity (T1) and afterwards every 10 minutes. The oxygen saturation values were maintained within normal limits during the procedure. The endotracheal pressure increased significantly after insuflation of the peritoneal cavity (p=0,0001), while the values of the end tidal C02 incresead at T4 and T5, when compared with T0. The authors concluded that controlled mechanic ventilation along with an appropriate monitoring of the patient must be taken into account in order to prevent respiratory disturbances and its adverse effects